AP431 Diodes Inc, AP431 Datasheet

Voltage & Current References 2.495V - 36V 250mA

AP431

Manufacturer Part Number
AP431
Description
Voltage & Current References 2.495V - 36V 250mA
Manufacturer
Diodes Inc
Datasheet

Specifications of AP431

Product
Voltage References
Topology
Shunt References
Output Voltage
+/- 1 %
Initial Accuracy
1 %
Average Temperature Coefficient (typ)
30 PPM / C
Series Vref - Input Voltage (max)
36 V
Shunt Current (max)
200 mA
Maximum Operating Temperature
+ 85 C
Package / Case
SOP-8
Input Voltage
20 V
Minimum Operating Temperature
- 20 C
Mounting Style
SMD/SMT
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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Features
Notes:
Typical Application Circuit
AP431/AP431A
Document number: DS31002 Rev. 15 - 2
Precision reference voltage
Sink current capability: 200mA
Minimum cathode current for regulation: 300μA
Equivalent full-range temp coefficient: 30 ppm/oC
Fast turn-on response
Low dynamic output impedance: 0.2Ω
Programmable output voltage to 36V
Low output noise
Lead Free packages: SOT25, SC59, SC59R, SOT89-3L
and TO92-3L
SOT23, SOT23R, SOT25, SC59, SC59R, SOP-8L,
SOT89-3L, TO92-3L: Available in “Green” Molding
Compound (No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
AP431: 2.495V ± 1%
AP431A: 2.495V ± 0.5%
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
V
IN
C
in
+
AP431
V
Precision Regulator
OUT
www.diodes.com
ADJUSTABLE PRECISION SHUNT REGULATOR
= (1+R1/R2)V
1 of 16
The AP431 and AP431A are 3-terminal adjustable precision
shunt regulators with guaranteed temperature stability over
the applicable extended commercial temperature range.
The output voltage may be set at any level greater than
2.495V (V
resistors that act as a voltage divider network. These
devices have a typical output impedance of 0.2Ω. Active
output circuitry provides very sharp turn-on characteristics,
making these devices excellent improved replacements for
Zener diodes in many applications.
The precise (+/-) 1% Reference voltage tolerance of the
AP431/AP431A make it possible in many applications to
avoid the use of a variable resistor, consequently saving
cost and eliminating drift and reliability problems associated
with it.
Description
REF
REF
) up to 36V merely by selecting two external
R2
R1
AP431/AP431A
+
C
out
V
OUT
© Diodes Incorporated
June 2010

Related parts for AP431

AP431 Summary of contents

Page 1

... Zener diodes in many applications. The precise (+/-) 1% Reference voltage tolerance of the AP431/AP431A make it possible in many applications to avoid the use of a variable resistor, consequently saving cost and eliminating drift and reliability problems associated with it. ...

Page 2

... Anode Cathode REF AP431/AP431A Document number: DS31002 Rev ADJUSTABLE PRECISION SHUNT REGULATOR (2) SOP-8L CATHODE 5 ANODE ANODE ANODE 4 REF (4) SC59R 3 REF ANODE 2 CATHODE (6) SOT23R ANODE (8) TO92- www.diodes.com AP431/AP431A (Top View REF 2 ANODE 7 ANODE (Top View) 3 CATHODE 1 2 REF (Top View) 3 CATHODE ...

Page 3

... Ratings apply to ambient temperature at 25°C. AP431/AP431A Document number: DS31002 Rev ADJUSTABLE PRECISION SHUNT REGULATOR + - V REF Anode (A) Cathode (C) REF (R) Anode (A) Parameter SOT23(R) SOT25 SC59(R) SOP-8L SOT89-3L TO92- www.diodes.com AP431/AP431A Rating Unit +36 V -10 to +250 - -65 to +150 C mW 400 mW 550 mW 400 ...

Page 4

... REF defined as: Z Δ Δ Δ ≈ Δ www.diodes.com AP431/AP431A Min Typ. Max 2.470 2.520 2.495 2.482 2.507 ⎯ 8.0 20 ⎯ to10V -1.4 -2.0 REF ⎯ ⎯ 1.4 3.5 ⎯ 0.4 1.2 ⎯ 0.19 0.5 ⎯ 0.1 1.0 ⎯ 0.2 ...

Page 5

... Fig 1. Test Circuit for REF AP431/AP431A Document number: DS31002 Rev ADJUSTABLE PRECISION SHUNT REGULATOR REF V R2 REF Note:V =V (1+R1/R2)+ REF REFx Fig 2. Test Circuit for V > V Fig 3. Test Circuit for Off-State Current KA REF www.diodes.com AP431/AP431A Z(OFF) June 2010 © Diodes Incorporated ...

Page 6

... Cathode Current (uA) vs Cathode Voltage 600 ref o Ta=25 400 200 0 -200 1.5 2.5 -1 -0.5 Reference Input Current vs Free Temperature 2 R1=10K 1.8 I =10mA KA 1.6 1.4 1 -50 -25 o Free-Air Temperature ( www.diodes.com AP431/AP431A C 0 0.5 1 1.5 2 2.5 Cathode Voltage( 100 125 o C) June 2010 © Diodes Incorporated ...

Page 7

... Document number: DS31002 Rev ADJUSTABLE PRECISION SHUNT REGULATOR (Continued) I =10mA = 15KΩ 9μF - 8.25KΩ Test Circuit for Voltage Amplification 1M 10M Test Circuit for Reference Impedance 1M 10M www.diodes.com AP431/AP431A Output I KA 232Ω GND 1KΩ Output I KA 50Ω GND June 2010 © Diodes Incorporated ...

Page 8

... Document number: DS31002 Rev ADJUSTABLE PRECISION SHUNT REGULATOR (Continued † o TA=25 C Stable conditions with C =0.V and C L BATT www.diodes.com AP431/AP431A 220Ω Output Pulse 50Ω Generator f=100kHz GND Test Circuit for Pulse Response 150 BATT Test Circuit for Curve 150? R1=10K ...

Page 9

... R1/R2 OUT REF Fig. 8 Higher-Current Shunt Regulator R1A R1B + V BE R2A R2B Low Limit R1B/R2B REF (1 + R1A/R2A) High Limit V REF Fig.10 Over-Voltage / Under-Voltage Protection Circuit www.diodes.com AP431/AP431A I R OUT OUT REF Fig. 6 Current Limiter or Current Source V IN OUT PULSE R1/R2 IMIT REF Fig ...

Page 10

... Notes: 6. SOP-8L, SOT23 and SOT23R are available in “Green” products only. 7. Ammo Box is for TO92-3L Spread Lead. 8. Suffix “A” denotes AP431A device. 9. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. AP431/AP431A Document number: DS31002 Rev ...

Page 11

... X : A~Z : Green Identification code Y : Year 0 Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green 2 3 a~z : Lead Free ( Top View ) Green YY : Year : 08, 09,10~ AP431X WW : Week : 01~52 represents 52 and 53 week X : Internal Code www.diodes.com AP431/AP431A June 2010 © Diodes Incorporated ...

Page 12

... A: 2.495 + 0.5% Device Package (Note 10) AP431SA AP431ASA AP431SR AP431ASR AP431Q AP431AQ AP431W AP431AW AP431R AP431AR AP431Y AP431AY Notes: 10. For Packaging Details our website at http://www.diodes.com/datasheets/ap02007.pdf. AP431/AP431A Document number: DS31002 Rev ADJUSTABLE PRECISION SHUNT REGULATOR XX : Identification code Y : Year : 0 Week : A~Z : 1~26 week a~z : 27~52 week ...

Page 13

... Package Outline Dimensions (1) Package type: SOT25 (2) Package Type: SC59 and SC59R 0.35/0.50 TOP VIEW 1.90 2.90/3.10 1.00/ 1.30 0.013/0.10 0.95 AP431/AP431A Document number: DS31002 Rev ADJUSTABLE PRECISION SHUNT REGULATOR (All Dimensions in mm) 2.70/ 3.00 0.10/0.20 0.35/0. www.diodes.com AP431/AP431A O June 2010 © Diodes Incorporated ...

Page 14

... Land Pattern Recommendation (Unit: mm) AP431/AP431A Document number: DS31002 Rev ADJUSTABLE PRECISION SHUNT REGULATOR (Continued) Gauge Plane Seating Plane 0.62/0.82 Detail "A" 7°~9° 0.35max. 45° Detail "A" 0°/8° www.diodes.com AP431/AP431A June 2010 © Diodes Incorporated ...

Page 15

... Typ 0.42 Typ 0.47 (6) Package Type: TO92-3L for Ammo pack AP431/AP431A Document number: DS31002 Rev ADJUSTABLE PRECISION SHUNT REGULATOR (Continued) 0.4 0.9 Land Pattern Recommendation (Unit: mm (2x) 0.36/0.48 0.35/0.43 Typ 0.42 Typ 0. www.diodes.com AP431/AP431A 1.7 1.5 June 2010 © Diodes Incorporated ...

Page 16

... Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2010, Diodes Incorporated www.diodes.com AP431/AP431A Document number: DS31002 Rev AP431/AP431A ADJUSTABLE PRECISION SHUNT REGULATOR IMPORTANT NOTICE LIFE SUPPORT www.diodes.com June 2010 © ...

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