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CS8182YDF8中文资料

CS8182

Micropower 200 mA

Low Dropout Tracking Regulator/Line Driver

The CS8182 is a monolithic integrated low dropout tracking regulator designed to provide adjustable buffered output voltage that closely tracks (±10 mV) the reference input. The output delivers up to 200 mA while being able to be configured higher, lower or equal to the reference voltages.

The output has been designed to operate over a wide range (2.8 V to

45 V) while still maintaining excellent DC characteristics. The CS8182 is protected from reverse battery, short circuit and thermal runaway conditions. The device also can withstand 45 V load dump transients and ?50 V reverse polarity input voltage transients. This makes it suitable for use in automotive environments.

The V REF/ENABLE lead serves two purposes. It is used to provide the input voltage as a reference for the output and it also can be pulled low to place the device in sleep mode where it nominally draws less than 30 m A from the supply.

Features

?200 mA Source Capability

?Output Tracks within ±10 mV Worst Case

?Low Dropout (0.35 V Typ. @ 200 mA)

?Low Quiescent Current

?Thermal Shutdown

?Short Circuit Protection

?Wide Operating Range

?Internally Fused Leads in SO?8 Package

?For Automotive and Other Applications Requiring Site and Change Control

V OUT

Adj

V REF/ENABLE

GND

V IN

Figure 1. Block Diagram

Device Package Shipping?ORDERING INFORMATION*

CS8182YDF8SO?895 Units/Rail CS8182YDFR8SO?8

CS8182YDPS5D2PAK 5?PIN

2500 Tape & Reel

CS8182YDPSR5

*Consult your local sales representative for SO?8 with exposed pads package option.

D2PAK 5?PIN750 Tape & Reel

50 Units/Rail

https://www.sodocs.net/doc/0916857621.html,

?For information on tape and reel specifications, including part orientation and tape sizes, please refer to our T ape and Reel Packaging Specifications Brochure, BRD8011/D.

PACKAGE PIN DESCRIPTION

MAXIMUM RATINGS

values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected.

1.60 second maximum above 183°C.

2.?5°C/+0°C allowable conditions.

*Depending on thermal properties of substrate. R q JA = R q JC + R q CA

ELECTRICAL CHARACTERISTICS (V IN = 14 V; V REF/ENABLE > 2.75 V; ?40°C < T J < +125°C; C OUT≥ 10 m F;

0.1 W< C < 1.0 W @ 10 kHz, unless otherwise specified.)

Regular Output

V/ENABLE

OUT

TYPICAL CHARACTERISTICS

181614121086420Figure 2. Quiescent Current vs. Output Current

100

120140160180200

OUTPUT CURRENT (mA)

Q U I E S C E N T C U R R E N T (m A )

Figure 3. Quiescent Current vs. Input Voltage

(Operating Mode)10.90.80.70.60.50.30.20.100

V IN , INPUT VOLTAGE (V)

Q U I E S C E N T C U R R E N T (m A )

0.4Figure 4. Quiescent Current vs. Input Voltage

(Sleep Mode)

Figure 5. V OUT Reverse Current Figure 6. V OUT Reverse Current

V IN , INPUT VOLTAGE (V)

Q U I E S C E N T C U R R E N T

(m A )

FORCED V OUT VOLTAGE (V)

C U R R E N T I N T O V O U T (m A )

FORCED V OUT VOLTAGE (V)

C U R R E N T I N T O V O U T (m A )

CIRCUIT DESCRIPTION

ENABLE Function

By pulling the V REF /ENABLE lead below 2.0 V typically,(see Figure 10 or Figure 11), the IC is disabled and enters a sleep state where the device draws less than 55 m A from supply. When the V REF /ENABLE lead is greater than 2.75 V ,V OUT tracks the V REF /ENABLE lead normally.

Output Voltage

The output is capable of supplying 200 mA to the load while configured as a similar (Figure 7), lower (Figure 9), or higher (Figure 8) voltage as the reference lead. The Adj lead acts as the inverting terminal of the op amp and the V REF lead as the non?inverting.

The device can also be configured as a high?side driver as displayed in Figure 12.

Figure 7. Tracking Regulator at the Same Voltage

Loads 5.0 V

B+

V OUT +V REF

Figure 8. Tracking Regulator at Higher Voltages

Loads V REF

B+

Figure 9. Tracking Regulator at Lower Voltages

Loads

V REF

B+

V OUT +V REF (R2R1)R2

)

Figure 10. Tracking Regulator with ENABLE Circuit

V REF

B+

Figure 11. Alternative ENABLE Circuit

Figure 12. High?Side Driver

MCU

B+

V OUT +B )*V SAT

** C2 is required for stability.

* C1 is required if the regulator is far from the power source filter.5.0 V 6.0 V?40 V To Load *** C3 is recommended for EMC susceptibility.

APPLICATION NOTES

V OUT Short to Battery

The CS8182 will survive a short to battery when hooked up the conventional way as shown in Figure 13. No damage to the part will occur. The part also endures a short to battery when powered by an isolated supply at a lower voltage as in

Figure 14. In this case the CS8182 supply input voltage is set at 7 V when a short to battery (14 V typical) occurs on V OUT which normally runs at 5 V . The current into the device (ammeter in Figure 14) will draw additional current as displayed in Figure 15.

Automotive Battery typically 14 V

Figure 13.

Figure 14.

Loads

Automotive Battery typically 14 V

** C2 is required for stability.

Figure 15. V

OUT Short to Battery

2.01.81.61.41.21.00.60.40.2

6510152025V OUT VOLTAGE (V)

C U R R E N T (m A )0.878911121314161718192122232426

Switched Application

The CS8182 has been designed for use in systems where the reference voltage on the V REF /ENABLE pin is continuously on. Typically, the current into the V REF /ENABLE pin will be less than 1.0 m A when the voltage on the V IN pin (usually the ignition line) has been switched out (V IN can be at high impedance or at ground.)Reference Figure 16.

BAT

Ignition Figure 16.

External Capacitors

The output capacitor for the CS8182 is required for stability. Without it, the regulator output will oscillate. Actual size and type may vary depending upon the application load and temperature range. Capacitor effective series resistance (ESR) is also a factor in the IC stability. Worst?case is determined at the minimum ambient temperature and maximum load expected.

The output capacitor can be increased in size to any desired value above the minimum. One possible purpose of this would be to maintain the output voltage during brief conditions of negative input transients that might be characteristic of a particular system.

The capacitor must also be rated at all ambient temperatures expected in the system. To maintain regulator stability down to ?40°C, a capacitor rated at that temperature must be used.

More information on capacitor selection for SMART REGULA TOR?s is available in the SMART REGULA TOR application note, “Compensation for Linear Regulators,”document number SR003AN/D, available through our website at https://www.sodocs.net/doc/0916857621.html,.

Calculating Power Dissipation in a Single Output Linear Regulator

The maximum power dissipation for a single output regulator (Figure 17) is:

PD(max)+{V IN(max)*V OUT(min)}I OUT(max)

)V IN(max)I Q

(1) where:

V IN(max) is the maximum input voltage,

V OUT(min) is the minimum output voltage,

I OUT(max) is the maximum output current, for the application,and

I Q is the quiescent current the regulator consumes at I OUT(max).

Once the value of PD(max) is known, the maximum permissible value of R q JA can be calculated:

R q JA+150°C*T A

P D(2)

The value of R q JA can then be compared with those in the package section of the data sheet. Those packages with R q JA’s less than the calculated value in equation 2 will keep the die temperature below 150°C.

In some cases, none of the packages will be sufficient to dissipate the heat generated by the IC, and an external heat sink will be required.

Figure 17. Single Output Regulator with Key

Performance Parameters Labeled

Heatsinks

A heatsink effectively increases the surface area of the package to improve the flow of heat away from the IC and into the surrounding air.

Each material in the heat flow path between the IC and the outside environment will have a thermal resistance. Like series electrical resistances, these resistances are summed to determine the value of R q JA:

R q JA+R q JC)R q CS)R q SA(3) where:

R q JC = the junction?to?case thermal resistance,

R q CS = the case?to?heatsink thermal resistance, and

R q SA = the heatsink?to?ambient thermal resistance.

R q JC appears in the package section of the data sheet. Like R q JA, it is a function of package type. R q CS and R q SA are functions of the package type, heatsink and the interface between them. These values appear in heat sink data sheets of heatsink manufacturers.

SOIC?8 DF SUFFIX CASE 751?07 ISSUE AB

NOTES:

1.DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

2.CONTROLLING DIMENSION: MILLIMETER.

3.DIMENSION A AND B DO NOT INCLUDE MOLD

PROTRUSION.

4.MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER

SIDE.

5.DIMENSION D DOES NOT INCLUDE DAMBAR

PROTRUSION. ALLOWABLE DAMBAR

PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN

EXCESS OF THE D DIMENSION AT MAXIMUM

MATERIAL CONDITION.

751?01 THRU 751?06 ARE OBSOLETE. NEW

STANDARD IS 751?07.

DIM

MIN MAX MIN MAX

INCHES

4.80

5.000.1890.197

MILLIMETERS

B 3.80 4.000.1500.157

C 1.35 1.750.0530.069

D0.330.510.0130.020

G 1.27 BSC0.050 BSC

H0.100.250.0040.010

J0.190.250.0070.010

K0.40 1.270.0160.050

M0 8 0 8

N0.250.500.0100.020

S 5.80 6.200.2280.244 Y

0.25 (0.010)Z S X S

____

Figure 18. SOIC?8

ǒmm

inches

SCALE 6:1

SOLDERING FOOTPRINT

D 2PAK?5DP SUFFIX CAS

E 936AC?01

ISSUE O

DIM MIN MAX MIN MAX MILLIMETERS INCHES A 0.3960.40610.0510.31B 0.3300.340

8.388.64C 0.1700.180 4.31 4.57D 0.0260.0360.660.91E 0.0450.055

1.14 1.40G 0.067 REF 1.70 REF H 0.5800.62014.7315.75K 0.0550.066 1.40 1.68L 0.0000.0100.000.25M 0.0980.108

2.49 2.74N 0.0170.0230.430.58NOTES:

1.DIMENSIONS AND TOLERANCING PER ANSI Y14.5M, 198

2.CONTROLLING DIMENSION: INCH.

3.PACKAGE OUTLINE EXCLUSIVE OF MOLD FLASH AND METAL BURR.

4.PACKAGE OUTLINE INCLUSIVE OF PLATING THICKNESS.

5.FOOT LENGTH MEASURED AT

INTERCEPT POINT BETWEEN DATUM A AND LEAD SURFACE.

P 0.0900.110 2.29 2.79R 0 8 S 0.0950.105 2.41 2.67

U 0.30 REF 7.62 REF V 0.305 REF 7.75 REF W

0.010

0.25

__0 8 __

SMART REGULATOR is a registered trademark of Semiconductor Components Industries, LLC (SCILLC).

ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

PUBLICATION ORDERING INFORMATION

CS8182YDF8中文资料

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