APL431L
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders.Features
General Description
Applications
The APL431L is a 3-terminal low voltage adjustable precision reference with specified thermal stability over applicable commercial temperature ranges. Out-put voltage may be set to any value between V ref (1.24 V) and 20 V with two external resistors (see Fig-ure 2). When used with an photocoupler, the APL431L is an ideal voltage reference in isolated feed-back circuits for 3V to 12V switching-mode power supplies. This device has a typical output imped-ance of 0.1?. Active output circuitry provides a very sharp turn-on characteristic, making the APL431L ex-cellent replacements for zener diodes in many applications, including on-board regulation and ad-justable power supplies.
? Precise Reference Voltage to 1.24V
? Guaranteed 0.5% or 1% Reference Voltage
Tolerance
? Sink Current Capability, 80uA to 100mA ? Quick Turn-on
? Adjustable Output Voltage, V O = V REF to 20V ? Low Operational Cathode Current, 80μA
Typical
? 0.1? Typical Output Impedance
? SOT-23-3, SOT-23-5, TO-92 and SOT-89
Packages
? Lead Free Available (RoHS Compliant)
? Linear Regulators
? Adjustable Power Supply ? Switching Power Supply
Symbol
Functional Diagram
SOT-23-3 (Top View)
REF ANODE
CATHODE
1
2
3
SOT-89 (Top View)
REF
ANODE CATHODE
123
REF
ANODE
CATHO DE
3
21TO-92 (Top View)Cathode
Anode
REF
REF NC
CATHODE
NC
ANODE 1
2
3
45SOT-23-5 (Top View)
APL431L
Ordering and Marking Information
Notes: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte in plate termination finish; which are fully compliant with RoHS and compatible with both SnPb and lead-free soldiering operations. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J STD-020C for MSL classification at lead-free peak reflow temperature.
Absolute Maximum Ratings
APL431L
Electrical Characteristics T A = 25°C ( unless otherwise noted)
Notes : 1.Full temperature range is 0°C to 70°C for APL431LXXC,and -40°C to 85°C for APL431LXXl.
Test Figures
Figure 1. Test Circuit for V KA =V REF , V O =V KA =V REF Figure 3. Test Circuit for I K(off)
V IN
V o
APL431L
Test Figures (Cont.)
Figure 2. Test Circuit for V KA >V REF ,
V O = V KA = V REF × (1+R 1/R 2) + I REF × R 1
V IN
V o
Application Schematic
V o
V
Precision Voltage Reference
V o
V IN
Precision High-Current Series Regulator
Notes for Application Circuits:
1) T o improve the stability of output voltage, a 0.1μF capacitor between cathode and anode of APL431L is strongly recommended.
2)Set V OUT according to the following equation: V OUT = V REF (1+R1/R2)+l REF R1
3)Choose the value for R B as follows:
A)The maximum limit for R B should be such that the cathode current(l K ) is greater than the mini mum operating current (80μA) at V IN(MIN). B)The minimum limit for RB should be such that the cathode current (l K ) does not exceed 100mA under all load conditions, and the instantaneous turnon value for lk does not exceed 150mA. Both of the following conditions must. be met: V IN(MAX)
150mA V IN(MAX)-V OUT
l OUT(MIN)+100mA
(to limit instantaneous turn-on l K ) R B,Min ≥(to limit l K under normal operating conditions)
R B,Min ≥
0.08
0.10
0.12
0.14
0.16
0.18
-50
-25
25
50
75
100
125
150
1.22
1.23
1.24
1.25
1.26
-50
-25
25
50
75
100
125
150
Junction Temperature (°C)R e f e r e n c e V o l t a g e (V )
R e f e r e n c e I n p u t C u r r e n t (μA )
Junction Temperature (°C)
Referemce Voltage vs.Junction Temperature
Reference Input Current vs.Junction Temperature
APL431L
0.1
0.2
0.3
0.4
0.5
-50
-25
25
50
75
100
125
150
0S
μ0
1V
5S
μ3V
0S
μ5S
μ0
1V
03V
Typical Characteristics
Input
R a t i o o f D e l t a R e f e r e n c e V o l t a g e t o
Junction Temperature (°C)
O f f S t a t e C a t h o d e C u r r e n t (μA )
Off State Cathode Current vs.
Junction Temperature
/?V vs. Junction Temperature
I KA =1mA
Output
Input
Output
T A =25°C
I KA =0.1mA
T A =25°C
APL431L
10203040506070
80901000.0001
0.0010.010.11
-10
010203040
5060
50
100150200250300350
0.01
0.1
1
10
100
10
100
1000
10000
100000
1000000
Typical Characteristics
Frequency (Hz)
Z k a (?)
Frequency (Hz)G a i n (d B )
P h a s e S h i f t (d e g r e e )
Gain vs. Phase Shift vs. Frequency
Zka vs. Frequency
Load Capacitance (μF)
I k (m A )
Stability Boundary Conditions
APL431L
Package Information SOT-23
APL431L
Package Information SOT-23-5
APL431L
Package Information TO-92
APL431L
Package Information
SOT-89 (Reference EIAJ ED-7500A Reg stration SC-62)
APL431L
Physical Specifications
T L
T P
25
T e m p e r a t u r e
Tim e
Reflow Condition (IR/Convection or VPR Reflow)
Classificatin Reflow Profiles
APL431L
Reliability Test Program
Carrier Tape & Reel Dimensions
APL431L
Carrier Tape & Reel Dimensions
Carrier Tape & Reel Dimensions
(mm)
APL431L
Cover Tape Dimensions
Customer Service
Anpec Electronics Corp.
Head Office :
5F, No. 2 Li-Hsin Road, SBIP,
Hsin-Chu, T aiwan, R.O.C.
T el : 886-3-5642000
Fax : 886-3-5642050
Taipei Branch :
7F, No. 137, Lane 235, Pac Chiao Rd.,
Hsin Tien City, Taipei Hsien, Taiwan, R. O. C.
T el : 886-2-89191368
Fax : 886-2-89191369