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降压稳压芯片LSP5502DATASHEET

PIN ASSIGNMENT

SS EN COMP FB

BS IN SW GND

SOP-8L

PIN DESCRIPTION

Name No.

Description

BS 1

Bootstrap. This pin acts as the positive rail for the high-side switch’s gate driver.

Connect a 0.01uF capacitor between BS and SW.

IN 2

Input Supply. Bypass this pin to G with a low ESR capacitor. See Input Capacitor

in the Application Information section.

SW 3 Switch Output. Connect this pin to the switching end of the inductor. GND 4 Ground.

FB 5

Feedback Input. The voltage at this pin is regulated to 0.925V. Connect to the

resistor divider between output and ground to set output voltage.

COMP 6

Compensation Pin. See Stability Compensation in the Application Information

section.

EN 7 Enable Input. When higher than 2.5V, this pin turns the IC on. When lower than

1.3V, this pin turns the IC off. Output voltage is discharged when the IC is off. This

pin should not be left open.

SS 8 Soft-Start Control Input. SS controls the soft-start period. Connect a capacitor from

SS to GND to set the soft-start period. A 0.1μF capacitor sets the soft-start period

to 15ms. To disable the soft-start feature, leave SS unconnected.

TYPICAL APPLICATION Distributed Power Systems

Networking Systems

FPGA, DSP, ASIC Power Supplies Green Electronics/ Appliances Notebook Computers

GENERAL DESCRIPTION

The LSP5502 is a monolithic synchronous buck regulator. The device integrates 120m ? MOSFETS that provide 2A continuous load current over a wide operating input voltage of 4.5V to 27V. Current mode control provides fast transient response and cycle-by-cycle current limit.

An adjustable soft-start prevents inrush current at turn on. In shutdown mode, the supply current drops below 1μA.

This device, available in an 8-pin SOP package,provides a very compact system solution with minimal reliance on external components.

FEATURES 2A Output Current

Wide 4.5V to 27V Operating Input Range Integrated 120m ? Power MOSFET Switches Output Adjustable from 0.925V to 24V

Up to 96% Efficiency Programmable Soft-Start

Stable with Low ESR Ceramic Output Capacitors Fixed 400KHz Frequency

Cycle-by-Cycle Over Current Protection Input Under Voltage Lockout

8-Pin SOP Package

ABSOLUTE MAXIMUM RATINGS

Parameter Value Unit

IN Supply Voltage -0.3 to 30 V

SW Voltage -1 to V IN + 0.3 V

BS Voltage V SW – 0.3 to V SW + 6 V

EN, FB, COMP Voltage -0.3 to 6 V

Continuous SW Current Internally limited A

Junction to Ambient Thermal Resistance (θJA)

(Test on Approximately 3 in2 Copper Area 1OZ copper FR4 board)

70 °C/W

Junction to Ambient Case Resistance (θJC) 20

°C/W Maximum Power Dissipation 0.76 W

Operating Temperature -20 to 85 °C

Storage Temperature -55 to 150 °C

Lead Temperature (Soldering, 10 sec) 300 °C

(Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long

periods may affect device reliability.)

Recommended Operating Conditions

Symbol Parameter Min Max Unit V IN Input

Voltage 4.5 27 V T J Operating

Junction

Temperature Range -20 125 o C

ELECTRICAL CHARACTERISTICS

(V IN = 12V, TA= 25°C unless otherwise specified.)

Parameter Symbol Test Conditions Min. Typ. Max. Unit Input Operating Voltage V IN V OUT = 1.0V, I LOAD = 0A to 2A 4.5 27 V

Input Holdup Voltage V OUT = 1.0V, I LOAD = 0A to 2A 4.5 V

Feedback Voltage V FB 4.5V

≤ V IN≤20V 0.900 0.925 0.950V

Feedback

Overvoltage

Threshold 1.1 V

High-Side Switch-On Resistance 120 m?

Low-Side Switch-On Resistance 120 m?High-Side Switch Leakage VEN = 0V, VSW = 0V 9 10 μA

Upper Switch Current Limit 3.5 4.0 A

Lower Switch Current Limit 0.9 A

COMP to Current Limit

Transconductance

G COMP 5.2 A/V

Error Amplifier Transconductance G EA?I COMP = ±10μA

800 μA/V Error Amplifier DC Gain A VEA480

V/V Switching Frequency f SW350 400 470 kHz

Short Circuit Switching Frequency V FB = 0 150 kHz Maximum Duty Cycle D MAX V FB = 0.8V 90 %

Minimum On Time 220 nS

EN Shutdown Threshold Voltage VEN Rising 1.1 1.3 1.5 V

EN Shutdown Threshold Voltage

Hysterisis 200

EN Lockout Threshold Voltage 2.2 2.5 2.7 V EN Lockout Hysterisis 210 mV

Supply Current in Shutdown V EN = 0 0.3 3.0 μA IC Supply Current in Operation V EN = 3V, V FB = 1.0V 1.4 1.5 mA

Rising 3.80 4.05 4.40 V Input UVLO Threshold Rising UVLO VEN

Input UVLO Threshold Hysteresis 210 mV Soft-start Current VSS = 0V 6 μA

Soft-start Period CSS = 0.1μF 15 mS Thermal Shutdown Temperature Hysteresis = 10°C 160 °C

FUNCTIONAL BLOCK DIAGRAM

COMP

FUNCTIONAL DESCRIPTION

The LSP5502 is a synchronous rectified, cur-rent-mode, step-down regulator. It regulates in-put voltages from 4.5V to 23V down to an out-put voltage as low as 0.925V, and supplies up to 2A of load current.

The LSP5502 uses current-mode control to regulate the output voltage. The output voltage is measured at FB through a resistive voltage divider and amplified through the internal trans-conductance error amplifier. The voltage at the COMP pin is compared to the switch current

measured internally to control the output voltage.

The converter uses internal N-Channel MOSFET switches to step-down the input voltage to the regulated output voltage. Since the high side MOSFET requires a gate voltage greater than the input voltage, a boost capacitor connected between SW and BS is needed to drive the high side gate. The boost capacitor is charged from the internal 5V rail when SW is low.

When the LSP5502 FB pin exceeds 20% of the nominal regulation voltage of 0.925V, the over volt-age comparator

is tripped and the COMP pin and the SS pin are discharged to GND, forcing the high-side switch off.

APPLICATION INFORMATION

Output Voltage Setting

Figure1. Output Voltage Setting

Figure 1 shows the connections for setting the output voltage. Select the proper ratio of the two feedback resistors RFB1 and RFB2 based on the output voltage. Typically, use RFB2 ≈ 10k? and determine RFB1 from the following equation:

(1)

Table 1-Recommended Resistance Values

VOUT RFB1 RFB2

1.0V 1.0k 12k

1.2V 3.0k 10k

1.8V 9.53k 10k

2.5V 16.9k 10k

3.3V 26.1k 10k

5V 44.2k 10k

12V 121k 10k

Inductor Selection

The inductor maintains a continuous current to the output load. This inductor current has a ripple that is dependent on the inductance value: higher inductance reduces the peak-to-peak ripple current. The trade off for high inductance value is the increase in inductor core size and series resistance, and the reduction in current handling

where V IN is the input voltage, V OUT is the output voltage, f SW is the switching frequency, I OUTMAX is the maximum output current, and K RIPPLE is the ripple factor. Typically, choose K RIPPLE = 30% to correspond to the peak-to-peak ripple current being 30% of the maximum output current.

With this inductor value, the peak inductor current is I OUT ? (1 + K RIPPLE / 2). Make sure that this peak inductor current is less that the 3A current limit. Finally, select the inductor core size so that it does not saturate at 3A. Typical inductor values for various output voltages are shown in Table 1.

V OUT 1.0V 1.2V 1.5V 1.8V 2.5V 3.3V5V

L 4.7uH

4.7uH6.8μH6.8μH10μH10μH15μH

Table 1. Typical Inductor Values

Input Capacitor

The input capacitor needs to be carefully selected to maintain sufficiently low ripple at the supply input of the converter. A low ESR capacitor is highly recommended. Since large current flows in and out of this capacitor during switching, its ESR also affects efficiency.

The input capacitance needs to be higher than 10μF. The best choice is the ceramic type; however, low ESR tantalum or electrolytic types may also be used provided that the RMS ripple current rating is higher than 50% of the output current. The input capacitor should be placed close to the IN and G pins of the IC, with the shortest traces possible. In the case of tantalum or electrolytic types, they can be further away if a small parallel 0.1μF ceramic capacitor is placed right next to the IC. Output Capacitor

ESR RIPPLE OUTMAX RIPPLE R K I V = where I OUTMAX RIPPLE ESR is the ESR of the output capacitor, f SW is the switching frequency, L is the inductor value, and C OUT is the output capacitance. In the case of ceramic output capacitors, R ESR is very small and does not contribute to the ripple. Therefore, a lower capacitance value can be used for ceramic capacitors. In the case of tantalum or electrolytic capacitors, the ripple is dominated by R ESR multiplied by the ripple current. In that case, the output capacitor is chosen to have sufficiently low ESR.

For ceramic output capacitors, typically choose a capacitance of about 22μF. For tantalum or electrolytic capacitors, choose a capacitor with less than 50m ? ESR. Optional Schottky Diode

During the transition between high-side switch and low-side switch, the body diode of the low side power MOSFET conducts the inductor current. The forward voltage of this body diode is high. An optional Schottky diode may be paralleled between the SW pin and GND pin to improve overall efficiency. Table 2 lists example Schottky diodes and their Manufacturers.

Table 2-Diode Selection Guide

Part Number Voltage/Current Rating

Vendor

B130 30V,1A Lite-on Semiconductor Corp. MBRS130 30V,1A International Rectifier

V IN

Stability Compensation

C COMP2 is needed only for high ESR output capacitor

Figure 2. Stability Compensation

The feedback loop of the IC is stabilized by the components at the COMP pin, as shown in Figure 2. The DC loop gain of the system is determined by the following equation:

(4)

COMP

and C COMP:

COMP

and C COMP2 (if C COMP2 is used):

The following steps should be used to compensate the IC:

STEP1. Set the crossover frequency at 1/10 of the switching frequency via RCOMP:

(9)

but limit RCOMP to 10k? maximum.

STEP2. Set the zero fZ1 at 1/4 of the crossover frequency. If RCOMP is less than 10k?, the equation for CCOMP is:

If RCOMP is limited to 10k?, then the actual crossover frequency is 10/ (VOUTCOUT). Therefore:

)

2.1

C OUT

OUT

COMP

= (11)

STEP3. If the output capacitor’s ESR is high enough to cause a zero at lower than 4 times the crossover frequency, an additional compensation capacitor CCOMP2 is required. The condition for using CCOMP2 is:

And the proper value for C COMP2 is:

Though C COMP2 is unnecessary when the output capacitor has sufficiently low ESR, a small value C COMP2 such as 100pF may improve stability against PCB layout parasitic effects.

Table 3 shows some calculated results based on the compensation method above.

VOUT COUT RCOMP CCOMP CCOMP2

Ceramic 1.5k 10nF 100pF

1.0V 22μF

1.2V 22μF

Ceramic 1.7k 10nF 100pF

Ceramic 2.2k 6.8nF 100pF

1.8V 22μF

Ceramic 3.6k 4.7nF 100pF

2.5V 22μF

Ceramic 4.7k 3.3nF 47pF

3.3V 22μF

Ceramic 6.8k 2.2nF 47pF

5V 22μF

1.0V 47μF SP Cap 3.0k 6.8nF 470pF

1.2V 47μF SP Cap 3.6k 4.7nF 330pF

1.8V 47μF SP Cap 5.6k 3.3nF 220pF

2.5V 47μF SP Cap 6.8k 2.2nF 200pF

3.3V 47μF SP Cap 10k 2.0nF 150pF

5V 47μF SP Cap 10k 2.2nF 150pF

1.0V 470μF/6.3V/30m 10k

2.2nF 1nF

1.2V 470μF/6.3V/30m 10k 3.3nF 1nF

1.8V 470μF/6.3V/30m 10k 4.7nF 1nF

2.5V 470μF/6.3V/30m 10k 6.8nF 1nF

3.3V 470μF/6.3V/30m 10k 8.2nF 1nF

5V 470μF/10V/30m 10k 10nF 1nF

Table3. Typical Compensation for Different Output Voltages and Output Capacitors

V IN

Figure 3 shows a sample LSP5502 application circuit generating 5V/2A output. Array

V IN

Figure 4 shows a sample LSP5502 application circuit generating 1.0V/2A output.

TYPICAL CHARACTERISTICS

Start up soft start Vin=12V, Vout=5V Iout=2A Operating status Vin=12V, Vout=5V Iout=2A

ripple of Vout Vin=12V, Vout=5V Iout=3A SCP

12Vin 5.0Vout Efficiency curve 12Vin 1.0Vout Efficiency curve

LSP5502 X X X

Package : S: SOP8Packing :

Blank : Tube or Bulk

A : Tape & Reel

C : -20 ~ 85C

Temperature :

MARKING INFORMATION

PACKAGE INFORMATION

Dimensions In Millimeters Dimensions In Inches

Symbol Min. Nom. Max. Min. Nom. Max.

0.069

0.063

A 1.35 1.6 1.75 0.053

A1 0.1 0.25 0.004 0.01

A2 1.25 1.45 1.55 0.049 0.057 0.061

B 0.31 0.41 0.51 0.012

0.016 0.02

0.008

0.01

C 0.1 0.2 0.25

0.0039

0.196 0.2

D 4.8 4.9 5 0.192

0.16

E 3.8 3.9 4 0.148

0.154

e 1.27 BSC 0.050 BSC

H 5.7 6 6.3 0.224

0.248

0.236

0.05

0.028

L 0.4 0.71 1.27

0.015

θ0ο 8ο0ο 8ο

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常用开关电源芯片大全

常用开关电源芯片大全第1章DC-DC电源转换器/基准电压源 1.1 DC-DC电源转换器 1.低噪声电荷泵DC-DC电源转换器AAT3113/AAT3114 2.低功耗开关型DC-DC电源转换器ADP3000 3.高效3A开关稳压器AP1501 4.高效率无电感DC-DC电源转换器FAN5660 5.小功率极性反转电源转换器ICL7660 6.高效率DC-DC电源转换控制器IRU3037 7.高性能降压式DC-DC电源转换器ISL6420 8.单片降压式开关稳压器L4960 9.大功率开关稳压器L4970A 10.1.5A降压式开关稳压器L4971 11.2A高效率单片开关稳压器L4978 12.1A高效率升压/降压式DC-DC电源转换器L5970 13.1.5A降压式DC-DC电源转换器LM1572 14.高效率1A降压单片开关稳压器LM1575/LM2575/LM2575HV 15.3A降压单片开关稳压器LM2576/LM2576HV 16.可调升压开关稳压器LM2577 17.3A降压开关稳压器LM2596 18.高效率5A开关稳压器LM2678 19.升压式DC-DC电源转换器LM2703/LM2704 20.电流模式升压式电源转换器LM2733 21.低噪声升压式电源转换器LM2750 22.小型75V降压式稳压器LM5007 23.低功耗升/降压式DC-DC电源转换器LT1073 24.升压式DC-DC电源转换器LT1615 25.隔离式开关稳压器LT1725 26.低功耗升压电荷泵LT1751

27.大电流高频降压式DC-DC电源转换器LT1765 28.大电流升压转换器LT1935 29.高效升压式电荷泵LT1937 30.高压输入降压式电源转换器LT1956 31.1.5A升压式电源转换器LT1961 32.高压升/降压式电源转换器LT3433 33.单片3A升压式DC-DC电源转换器LT3436 34.通用升压式DC-DC电源转换器LT3460 35.高效率低功耗升压式电源转换器LT3464 36.1.1A升压式DC-DC电源转换器LT3467 37.大电流高效率升压式DC-DC电源转换器LT3782 38.微型低功耗电源转换器LTC1754 39.1.5A单片同步降压式稳压器LTC1875 40.低噪声高效率降压式电荷泵LTC1911 41.低噪声电荷泵LTC3200/LTC3200-5 42.无电感的降压式DC-DC电源转换器LTC3251 43.双输出/低噪声/降压式电荷泵LTC3252 44.同步整流/升压式DC-DC电源转换器LTC3401 45.低功耗同步整流升压式DC-DC电源转换器LTC3402 46.同步整流降压式DC-DC电源转换器LTC3405 47.双路同步降压式DC-DC电源转换器LTC3407 48.高效率同步降压式DC-DC电源转换器LTC3416 49.微型2A升压式DC-DC电源转换器LTC3426 50.2A两相电流升压式DC-DC电源转换器LTC3428 51.单电感升/降压式DC-DC电源转换器LTC3440 52.大电流升/降压式DC-DC电源转换器LTC3442 53.1.4A同步升压式DC-DC电源转换器LTC3458 54.直流同步降压式DC-DC电源转换器LTC3703 55.双输出降压式同步DC-DC电源转换控制器LTC3736 56.降压式同步DC-DC电源转换控制器LTC3770

常用稳压芯片

LM2930T-5.0 5.0V低压差稳压器 LM2930T-8.0 8.0V低压差稳压器 LM2931AZ-5.0 5.0V低压差稳压器(TO-92) LM2931T-5.0 5.0V低压差稳压器 LM2931CT 3V to 29V低压差稳压器(TO-220,5PIN) LM2940CT-5.0 5.0V低压差稳压器 LM2940CT-8.0 8.0V低压差稳压器 LM2940CT-9.0 9.0V低压差稳压器 LM2940CT-10 10V低压差稳压器 LM2940CT-12 12V低压差稳压器 LM2940CT-15 15V低压差稳压器 LM123K 5V稳压器(3A) LM323K 5V稳压器(3A) LM117K 1.2V to 37V三端正可调稳压器(1.5A) LM317LZ 1.2V to 37V三端正可调稳压器(0.1A) LM317T 1.2V to 37V三端正可调稳压器(1.5A) LM317K 1.2V to 37V三端正可调稳压器(1.5A) LM133K 三端可调-1.2V to -37V稳压器(3.0A) LM333K 三端可调-1.2V to -37V稳压器(3.0A) LM337K 三端可调-1.2V to -37V稳压器(1.5A) LM337T 三端可调-1.2V to -37V稳压器(1.5A) LM337LZ 三端可调-1.2V to -37V稳压器(0.1A) LM150K 三端可调1.2V to 32V稳压器(3A)

LM350K 三端可调1.2V to 32V稳压器(3A) LM350T 三端可调1.2V to 32V稳压器(3A) LM138K 三端正可调1.2V to 32V稳压器(5A) LM338T 三端正可调1.2V to 32V稳压器(5A) LM338K 三端正可调1.2V to 32V稳压器(5A) LM336-2.5 2.5V精密基准电压源 LM336-5.0 5.0V精密基准电压源 LM385-1.2 1.2V精密基准电压源 LM385-2.5 2.5V精密基准电压源 LM399H 6.9999V精密基准电压源 LM431ACZ 精密可调2.5V to 36V基准稳压源LM723 高精度可调2V to 37V稳压器 LM105 高精度可调4.5V to 40V稳压器 LM305 高精度可调4.5V to 40V稳压器 MC1403 2.5V基准电压源 MC34063 充电控制器 SG3524 脉宽调制开关电源控制器 TL431 精密可调2.5V to 36V基准稳压源 TL494 脉宽调制开关电源控制器 TL497 频率调制开关电源控制器 TL7705 电池供电/欠压控制器 7805 正5V稳压器(1A)

常用芯片型号大全

常用芯片型号大全 4N35/4N36/4N37 "光电耦合器" AD7520/AD7521/AD7530/AD7521 "D/A转换器" AD7541 12位D/A转换器 ADC0802/ADC0803/ADC0804 "8位A/D转换器" ADC0808/ADC0809 "8位A/D转换器" ADC0831/ADC0832/ADC0834/ADC0838 "8位A/D转换器" CA3080/CA3080A OTA跨导运算放大器 CA3140/CA3140A "BiMOS运算放大器" DAC0830/DAC0832 "8位D/A转换器" ICL7106,ICL7107 "3位半A/D转换器" ICL7116,ICL7117 "3位半A/D转换器" ICL7650 "载波稳零运算放大器" ICL7660/MAX1044 "CMOS电源电压变换器" ICL8038 "单片函数发生器" ICM7216 "10MHz通用计数器" ICM7226 "带BCD输出10MHz通用计数器" ICM7555/7555 CMOS单/双通用定时器 ISO2-CMOS MT8880C DTMF收发器 LF351 "JFET输入运算放大器" LF353 "JFET输入宽带高速双运算放大器" LM117/LM317A/LM317 "三端可调电源" LM124/LM124/LM324 "低功耗四运算放大器" LM137/LM337 "三端可调负电压调整器" LM139/LM239/LM339 "低功耗四电压比较器"

LM158/LM258/LM358 "低功耗双运算放大器" LM193/LM293/LM393 "低功耗双电压比较器" LM201/LM301 通用运算放大器 LM231/LM331 "精密电压—频率转换器" LM285/LM385 微功耗基准电压二极管 LM308A "精密运算放大器" LM386 "低压音频小功率放大器" LM399 "带温度稳定器精密电压基准电路" LM431 "可调电压基准电路" LM567/LM567C "锁相环音频译码器" LM741 "运算放大器" LM831 "双低噪声音频功率放大器" LM833 "双低噪声音频放大器" LM8365 "双定时LED电子钟电路" MAX038 0.1Hz-20MHz单片函数发生器 MAX232 "5V电源多通道RS232驱动器/接收器" MC1403 "2.5V精密电压基准电路" MC1404 5.0v/6.25v/10v基准电压 MC1413/MC1416 "七路达林顿驱动器" MC145026/MC145027/MC145028 "编码器/译码器" MC145403-5/8 "RS232驱动器/接收器" MC145406 "RS232驱动器/接收器"

常用电源芯片及其参数

常用电源的电源稳压器件如下： 79L05 负5V稳压器 79L06 负6V稳压器 79L08 负8V稳压器 79L09 负9V稳压器 79L12 负12V稳压器 79L15 负15V稳压器 79L18 负18V稳压器 79L24 负24V稳压器 LM1575T-3.3 3.3V简易开关电源稳压器(1A) LM1575T-5.0 5V简易开关电源稳压器(1A) LM1575T-12 12V简易开关电源稳压器(1A) LM1575T-15 15V简易开关电源稳压器(1A) LM1575T-ADJ

简易开关电源稳压器(1A可调1.23 to 37) LM1575HVT-3.3 3.3V简易开关电源稳压器(1A) LM1575HVT-5.0 5V简易开关电源稳压器(1A) LM1575HVT-12 12V简易开关电源稳压器(1A) LM1575HVT-15 15V简易开关电源稳压器(1A) LM1575HVT-ADJ 简易开关电源稳压器(1A可调1.23 to 37) LM2575T-3.3 3.3V简易开关电源稳压器(1A) LM2575T-5.0 5V简易开关电源稳压器(1A) LM2575T-12 12V简易开关电源稳压器(1A) LM2575T-15 15V简易开关电源稳压器(1A) LM2575T-ADJ 简易开关电源稳压器(1A可调1.23 to 37) LM2575HVT-3.3 3.3V简易开关电源稳压器(1A) LM2575HVT-5.0 5V简易开关电源稳压器(1A) LM2575HVT-12 12V简易开关电源稳压器(1A)

LM2575HVT-15 15V简易开关电源稳压器(1A) LM2575HVT-ADJ 简易开关电源稳压器(1A可调1.23 to 37) LM2576T-3.3 3.3V简易开关电源稳压器(3A) LM2576T-5.0 5.0V简易开关电源稳压器(3A) LM2576T-12 12V简易开关电源稳压器(3A) LM2576T-15 15V简易开关电源稳压器(3A) LM2576T-ADJ 简易开关电源稳压器(3A可调1.23V to 37V) LM2576HVT-3.3 3.3V简易开关电源稳压器(3A) LM2576HVT-5.0 5.0V简易开关电源稳压器(3A) LM2576HVT-12 12V简易开关电源稳压器(3A) LM2576HVT-15 15V简易开关电源稳压器(3A) LM2576HVT-ADJ 简易开关电源稳压器(3A可调1.23V to 37V) LM2930T-5.0 5.0V低压差稳压器

超详细整理稳压芯片型号

超详细整理稳压芯片型号 LM2930T-5.0 5.0V低压差稳压器LM2930T-8.0 8.0V低压差稳压器 LM2931AZ-5.0 5.0V低压差稳压器(TO-92) LM2931T-5.0 5.0V低压差稳压器 LM2931CT 3V to 29V低压差稳压器(TO-220,5PIN) LM2940CT-5.0 5.0V低压差稳压器 LM2940CT-8.0 8.0V低压差稳压器 LM2940CT-9.0 9.0V低压差稳压器 LM2940CT-10 10V低压差稳压器 LM2940CT-12 12V低压差稳压器 LM2940CT-15 15V低压差稳压器 LM123K 5V稳压器(3A) LM323K 5V稳压器(3A) LM117K 1.2V to 37V三端正可调稳压器(1.5A) LM317LZ 1.2V to 37V三端正可调稳压器(0.1A) LM317T 1.2V to 37V三端正可调稳压器(1.5A) LM317K 1.2V to 37V三端正可调稳压器(1.5A) LM133K 三端可调-1.2V to -37V稳压器(3.0A) LM333K 三端可调-1.2V to -37V稳压器(3.0A) LM337K 三端可调-1.2V to -37V稳压器(1.5A) LM337T 三端可调-1.2V to -37V稳压器(1.5A) LM337LZ 三端可调-1.2V to -37V稳压器(0.1A) LM150K 三端可调1.2V to 32V稳压器(3A) LM350K 三端可调1.2V to 32V稳压器(3A) LM350T 三端可调1.2V to 32V稳压器(3A) LM138K 三端正可调1.2V to 32V稳压器(5A) LM338T 三端正可调1.2V to 32V稳压器(5A) LM338K 三端正可调1.2V to 32V稳压器(5A) LM336-2.5 2.5V精密基准电压源 LM336-5.0 5.0V精密基准电压源 LM385-1.2 1.2V精密基准电压源 LM385-2.5 2.5V精密基准电压源 LM399H 6.9999V精密基准电压源 LM431ACZ 精密可调2.5V to 36V基准稳压源 LM723 高精度可调2V to 37V稳压器 LM105 高精度可调4.5V to 40V稳压器 LM305 高精度可调4.5V to 40V稳压器 MC1403 2.5V基准电压源 MC34063 充电控制器

电子设计作品-开关电源-常用电源及稳压芯片

LM337T 三端可调JBV to -37V 稳压器(1?5A) 常用电源及稳压芯片［日期：2006-03-16］来源：作者：［字体：大中小］ 5.0V 低压差稳压器 8.0V 低压差稳压器 5.0V 低压差稳压器(TO ?92) 5.0V 低压差稳压器 3V to 29V 低压差稳压器(TO ?220?5PIN) 5?0V 低压差稳压器 8.0V 低压差稳压器 9.0V 低压差稳压器三端可调-L2V to -37V 稳用器(3?0A) 三端可调?1?2V to -37V 稳压器(3.0A) LM2940CT-10 10V 低压差稳压器 LM2940CTJ2 12V 低圧差稳斥器 LM2940CT-15 15V 低压差稳斥器 LM123K 5V 稳压器(3A) LM323K 5V 稳爪器(3A) LM117K I ?2V to 37V 三端正可调稳压器(1?5A) LM317LZ L2V to 37V 三端正可调稳斥器(0JA) LM317T L2V to 37V 三端正可调稳压器(1.5A) LM317K L2V to 37V 三端正可调稳压器(L5A) ** LM2931CT LM133K LM333K LM337K 三端可调JEV to -37V 稳压器(1?5A)

LM337LZ 三端可调-L2V to -37V稳斥器(O? 1A) LM150K 三端可调1.2V to 32V稳压器(3A) LM35OK 三端可调1.2V to 32V稳压器(3A) LM350T 三端可调L2V to 32V稳压器(3A) LM138K 二端正可调1.2V to 32V稳压器(5A) LM338T 二端正可调1.2V to 32V稳压器(5A) LM338K 三端正可调1.2V 10 32V稳压器(5A) ** 2.5V精密基准电压源 ** 5.0V精密基准电压源 ** 1.2V精密基准电压源 ** 2.5V精密基准电压源 LM399H 6.9999V精密基准电压源 LM431ACZ 精密可调2,5V to 36V基准稳压源LM723 高精度可调2V10 37V稳压器 LM105 高精度可调4.5V to 40V稳压器 LM3O5 高精度可调45V to 40V稳压器 MC1403 2.5V基准电压源 MC34063 充电控制器 SG3524 脉宽调制开关电源控制器 TL43i 精密可调2.5V to 36V基准稳压源 TL494 脉宽调制开关电源控制器 TL497 频率调制开关电源控制器

稳压芯片大全

5v 3.3 1.2 1.5 1.8 2.5V稳压电源芯片大全LM317LZ 1.2V to 37V三端正可调稳压器(0.1A) LM317T 1.2V to 37V三端正可调稳压器(1.5A) LM317K 1.2V to 37V三端正可调稳压器(1.5A) LM133K 三端可调-1.2V to -37V稳压器(3.0A) LM333K 三端可调-1.2V to -37V稳压器(3.0A) LM337K 三端可调-1.2V to -37V稳压器(1.5A) LM337T 三端可调-1.2V to -37V稳压器(1.5A) LM337LZ 三端可调-1.2V to -37V稳压器(0.1A) LM150K 三端可调1.2V to 32V稳压器(3A) LM350K 三端可调1.2V to 32V稳压器(3A) LM350T 三端可调1.2V to 32V稳压器(3A) LM138K 三端正可调1.2V to 32V稳压器(5A) LM338T 三端正可调1.2V to 32V稳压器(5A) LM338K 三端正可调1.2V to 32V稳压器(5A) LM336-2.5 2.5V精密基准电压源 LM336-5.0 5.0V精密基准电压源 LM385-1.2 1.2V精密基准电压源 LM385-2.5 2.5V精密基准电压源

LM399H 6.9999V精密基准电压源 LM431ACZ 精密可调2.5V to 36V基准稳压源LM723 高精度可调2V to 37V稳压器 LM105 高精度可调4.5V to 40V稳压器 LM305 高精度可调4.5V to40V稳压器 MC1403 2.5V基准电压源 MC34063 DC-DC直流变换器 SG3524 脉宽调制开关电源控制器 TL431 精密可调2.5V to 36V基准稳压源 TL494 脉宽调制开关电源控制器 TL497 频率调制开关电源控制器 TL7705 电池供电/欠压控制器

电子设计作品-开关电源-常用电源及稳压芯片

常用电源及稳压芯片 [日期：2006-03-16] 来源：作者：[字体：大中小] ** 5.0V低压差稳压器 ** 8.0V低压差稳压器 ** 5.0V低压差稳压器(TO-92) ** 5.0V低压差稳压器 LM2931CT 3V to 29V低压差稳压器(TO-220,5PIN) ** 5.0V低压差稳压器 ** 8.0V低压差稳压器 ** 9.0V低压差稳压器 LM2940CT-10 10V低压差稳压器 LM2940CT-12 12V低压差稳压器 LM2940CT-15 15V低压差稳压器 LM123K 5V稳压器(3A) LM323K 5V稳压器(3A) LM117K 1.2V to 37V三端正可调稳压器(1.5A) LM317LZ 1.2V to 37V三端正可调稳压器(0.1A) LM317T 1.2V to 37V三端正可调稳压器(1.5A) LM317K 1.2V to 37V三端正可调稳压器(1.5A) LM133K 三端可调-1.2V to -37V稳压器(3.0A) LM333K 三端可调-1.2V to -37V稳压器(3.0A) LM337K 三端可调-1.2V to -37V稳压器(1.5A) LM337T 三端可调-1.2V to -37V稳压器(1.5A)

LM337LZ 三端可调-1.2V to -37V稳压器(0.1A) LM150K 三端可调1.2V to 32V稳压器(3A) LM350K 三端可调1.2V to 32V稳压器(3A) LM350T 三端可调1.2V to 32V稳压器(3A) LM138K 三端正可调1.2V to 32V稳压器(5A) LM338T 三端正可调1.2V to 32V稳压器(5A) LM338K 三端正可调1.2V to 32V稳压器(5A) ** 2.5V精密基准电压源 ** 5.0V精密基准电压源 ** 1.2V精密基准电压源 ** 2.5V精密基准电压源 LM399H 6.9999V精密基准电压源 LM431ACZ 精密可调2.5V to 36V基准稳压源LM723 高精度可调2V to 37V稳压器 LM105 高精度可调4.5V to 40V稳压器 LM305 高精度可调4.5V to 40V稳压器 MC1403 2.5V基准电压源 MC34063 充电控制器 SG3524 脉宽调制开关电源控制器 TL431 精密可调2.5V to 36V基准稳压源 TL494 脉宽调制开关电源控制器 TL497 频率调制开关电源控制器

常用开关电源芯片大全

常用电源及稳压芯片介绍

常用电源及稳压芯片介绍 LM2930T-5.0 5.0V 低压差稳压器 LM2930T-8.0 8.0V 低压差稳压器 ================================================= LM2931AZ-5.0 5.0V 低压差稳压器 (TO-92) LM2931T-5.0 5.0V 低压差稳压器 LM2931CT 3V to 29V 低压差稳压器 (TO-220,5PIN) ================================================= LM2940CT-5.0 5.0V 低压差稳压器 LM2940CT-8.0 8.0V 低压差稳压器 LM2940CT-9.0 9.0V 低压差稳压器 LM2940CT-10 10V 低压差稳压器 LM2940CT-12 12V 低压差稳压器 LM2940CT-15 15V 低压差稳压器 ================================================= LM123K 5V 稳压器(3A) LM323K 5V 稳压器(3A) LM117K 1.2V to 37V 三端正可调稳压器(1.5A) LM317LZ 1.2V to 37V 三端正可调稳压器(0.1A) LM317T 1.2V to 37V 三端正可调稳压器(1.5A) LM317K 1.2V to 37V 三端正可调稳压器(1.5A) ================================================ LM133K -1.2V to -37V 三端可调稳压器(3.0A) LM333K -1.2V to -37V 三端可调稳压器(3.0A) LM337K -1.2V to -37V 三端可调稳压器(1.5A) LM337LZ -1.2V to -37V 三端可调稳压器(0.1A) LM350K 1.2V to 32V 三端可调稳压器(3A) LM350T 1.2V to 32 三端可调V稳压器(3A) LM338T 1.2V to 32V 三端正可调稳压器(5A) LM336-2.5 2.5V 精密基准电压源第 1 页

稳压电源芯片大全 (1)

稳压电源芯片大全常用稳压IC大全 7805正5V稳压器(1A) 7806正6V稳压器(1A) 7808正8V稳压器(1A) 7809正9V稳压议（1A） 7812正12V稳压器(1A) 7815正15V稳压器(1A) 7818正18V稳压器(1A) 7824正24V稳压器(1A) 78L05正5V稳压器(100ma) 78L06正6V稳压器(100ma) 78L08正8V稳压器(100ma) 78L09正9V稳压器(100ma) 78L12正12V稳压器(100ma) 78L15正15V稳压器(100ma) 78L18正18V稳压器(100ma) 78L24正24V稳压器(100ma) 7905负5V稳压器(1A) 7906负6V稳压器(1A) 7908负8V稳压器(1A) 7909负9V稳压器（1A） 7912负12V稳压器(1A) 7915负15V稳压器(1A) 7918负18V稳压器(1A) 7924负24V稳压器(1A)

*************************************** 79L05负5V稳压器(100ma) 79L06负6V稳压器(100ma) 79L08负8V稳压器(100ma) 79L09负9V稳压器(100ma) 79L12负12V稳压器(100ma) 79L15负15V稳压器(100ma) 79L18负18V稳压器(100ma) 79L24负24V稳压器(100ma) *************************************** LM1575T-3.3 3.3V简易开关电源稳压器(1A) LM1575T-5.05V简易开关电源稳压器(1A) LM1575T-1212V简易开关电源稳压器(1A) LM1575T-1515V简易开关电源稳压器(1A) LM1575T-ADJ简易开关电源稳压器(1A可调1.23to37) LM1575HVT-3.3 3.3V简易开关电源稳压器(1A) LM1575HVT-5.05V简易开关电源稳压器(1A) LM1575HVT-1212V简易开关电源稳压器(1A) LM1575HVT-1515V简易开关电源稳压器(1A) LM1575HVT-ADJ简易开关电源稳压器(1A可调1.23to37) ************************************** LM2575T-3.3 3.3V简易开关电源稳压器(1A) LM2575T-5.05V简易开关电源稳压器(1A) LM2575T-1212V简易开关电源稳压器(1A) LM2575T-1515V简易开关电源稳压器(1A) LM2575T-ADJ简易开关电源稳压器(1A可调1.23to37) LM2575HVT-3.3 3.3V简易开关电源稳压器(1A) LM2575HVT-5.05V简易开关电源稳压器(1A)

常用电源芯片及其全参数

常用电源的电源稳压器件如下：79L05 负5V稳压器 79L06 负6V稳压器 79L08 负8V稳压器 79L09 负9V稳压器 79L12 负12V稳压器 79L15 负15V稳压器 79L18 负18V稳压器

79L24 负24V稳压器 LM1575T-3.3 3.3V简易开关电源稳压器(1A) LM1575T-5.0 5V简易开关电源稳压器(1A) LM1575T-12 12V简易开关电源稳压器(1A) LM1575T-15 15V简易开关电源稳压器(1A) LM1575T-ADJ 简易开关电源稳压器(1A可调1.23 to 37) LM1575HVT-3.3 3.3V简易开关电源稳压器(1A) LM1575HVT-5.0 5V简易开关电源稳压器(1A)

LM1575HVT-12 12V简易开关电源稳压器(1A) LM1575HVT-15 15V简易开关电源稳压器(1A) LM1575HVT-ADJ 简易开关电源稳压器(1A可调1.23 to 37) LM2575T-3.3 3.3V简易开关电源稳压器(1A) LM2575T-5.0 5V简易开关电源稳压器(1A) LM2575T-12 12V简易开关电源稳压器(1A) LM2575T-15 15V简易开关电源稳压器(1A) LM2575T-ADJ 简易开关电源稳压器(1A可调1.23 to 37)

LM2575HVT-3.3 3.3V简易开关电源稳压器(1A) LM2575HVT-5.0 5V简易开关电源稳压器(1A) LM2575HVT-12 12V简易开关电源稳压器(1A) LM2575HVT-15 15V简易开关电源稳压器(1A) LM2575HVT-ADJ 简易开关电源稳压器(1A可调1.23 to 37) LM2576T-3.3 3.3V简易开关电源稳压器(3A) LM2576T-5.0 5.0V简易开关电源稳压器(3A) LM2576T-12 12V简易开关电源稳压器(3A)

LM1117_稳压芯片资料7I

w w w. C h i n a d z .C o m LM1117/LM1117I 800mA Low-Dropout Linear Regulator General Description The LM1117is a series of low dropout voltage regulators with a dropout of1.2V at800mA of load current.It has the same pin-out as National Semiconductor’s industry standard LM317. The LM1117is available in an adjustable version,which can set the output voltage from1.25V to13.8V with only two external resistors.In addition,it is also available in five fixed voltages,1.8V,2.5V,2.85V,3.3V,and5V. The LM1117offers current limiting and thermal shutdown.Its circuit includes a zener trimmed bandgap reference to as-sure output voltage accuracy to within±1%. The LM1117series is available in LLP,TO-263,SOT-223, TO-220,and TO-252D-PAK packages.A minimum of10μF tantalum capacitor is required at the output to improve the transient response and stability.Features n Available in1.8V,2.5V,2.85V,3.3V,5V,and Adjustable Versions n Space Saving SOT-223and LLP Packages n Current Limiting and Thermal Protection n Output Current800mA n Line Regulation0.2%(Max) n Load Regulation0.4%(Max) n Temperature Range —LM11170?C to125?C —LM1117I?40?C to125?C Applications n 2.85V Model for SCSI-2Active Termination n Post Regulator for Switching DC/DC Converter n High Efficiency Linear Regulators n Battery Charger n Battery Powered Instrumentation Typical Application Active Terminator for SCSI-2Bus 10091905 Fixed Output Regulator 10091928April2006LM1117/LM1117I 800mA Low-Dropout Linear Regulator ?2006National Semiconductor Corporation https://www.sodocs.net/doc/771601464.html,

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电子设计作品-开关电源-常用电源及稳压芯片

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稳压电源芯片大全 (1)

常用电源芯片及其全参数

LM1117_稳压芯片资料7I

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