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AZ431L

Document number: DS36801 Rev. 3 - 2

1 of 18

www.diodes.com

January 2014

AZ431L

A Product Line of

Diodes Incorporated

LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR

Description

The AZ431L series ICs are low voltage three-terminal adjustable

regulators with guaranteed thermal stability over a full operation

range. These ICs feature sharp turn-on characteristics, low

temperature coefficient and low output impedance, which make them

ideal substitutes for Zener diodes in applications such as switching

power supply, charger, motherboard and other adjustable regulators.

The output voltage can be set to any value between 1.24V and 18V

with two external resistors.

The AZ431L precision reference is offered in two voltage tolerance:

0.5% and 1.0%.

These ICs are available in 4 packages: TO-92 (bulk or ammo

packing), SOT-23, SOT-23-5 and SOT-89.

Features

 Wide Programmable Precise Output Voltage from 1.24V to 18V

 High Stability under Capacitive Load

 Low Temperature Deviation: 3mV Typical

 Low Equivalent Full-range Temperature Coefficient: 20PPM/

Typical

 Low Dynamic Output Resistance: 0.05Ω Typical

 High Sink Current Capacity from 0.1mA to 100mA

 Low Output Noise

 Wide Operating Range of -40 to +125

Applications

 Graphic Card

 PC Motherboard

 Voltage Adapter

 Switching Power Supply

 Charger

Pin Assignments

(Top View) (Top View) (Top View)

(TO-92 (Bulk Packing)/ Z Package) (TO-92 (Ammo Packing)/ Z Package) (SOT-23/ N Package)

CATHODE

ANODE

REF

CATHODE

ANODE

REF

CATHODE

ANODE

REF

Summary of content (18 pages)

PAGE 1
A Product Line of Diodes Incorporated AZ431L LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR Description Features The AZ431L series ICs are low voltage three-terminal adjustable regulators with guaranteed thermal stability over a full operation range.
PAGE 2
A Product Line of Diodes Incorporated AZ431L Pin Assignments (Cont.) (Top View) NC 1 * 2 CATHODE 3 (Note 1) (Top View) 5 ANODE 4 REF (SOT-23-5/ K Package) 1 2 (Top View) 3 1 2 3 REF ANODE CATHODE REF ANODE CATHODE (SOT-89 Option 1/ R Package) (SOT-89 Option 2/ R Package) Note 1: *Pin 2 is attached to substrate and must be connected to ANODE or open. Typical Applications Circuit Shunt Regulator High Current Shunt Regulator AZ431L Document number: DS36801 Rev. 3 - 2 2 of 18 www.
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A Product Line of Diodes Incorporated AZ431L Typical Applications Circuit (Cont.) Current Source or Current Limit Precision 5V 1A Regulator PWM Converter with Reference AZ431L Document number: DS36801 Rev. 3 - 2 3 of 18 www.diodes.
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A Product Line of Diodes Incorporated AZ431L Functional Block Diagram Absolute Maximum Ratings (Note 2) Symbol VKA Cathode Voltage IKA Cathode Current Range (Continuous) IREF Reference Input Current Range PD Power Dissipation TJ TSTG Note 2: Parameter Rating Unit 20 V -100 to 100 mA 10 mA Z, R Package 770 N, K Package 370 mW Junction Temperature Storage Temperature Range +150 ºC -65 to +150 ºC Stresses greater than those listed under “Absolute Maximum Ratings” may cause perman
PAGE 5
A Product Line of Diodes Incorporated AZ431L Electrical Characteristics Symbol (Operating Conditions: TA = +25 ºC, unless otherwise noted.) Parameter Test Circuit Conditions Min Typ Max 1.234 1.240 1.246 1.228 1.240 1.252 0 to +70°C – 2 10 -40 to +85°C – 3 10 -40 to +125°C – 4 15 0.5% VREF Reference Voltage 4 VKA = VREF, IKA = 10mA 1.
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A Product Line of Diodes Incorporated AZ431L Electrical Characteristics (Cont.) Test Circuit 4 for VKA = VREF Test Circuit 5 for VKA > VREF Test Circuit 6 for IOFF AZ431L Document number: DS36801 Rev. 3 - 2 6 of 18 www.diodes.
PAGE 7
A Product Line of Diodes Incorporated AZ431L Performance Characteristics Reference Voltage vs. Ambient Temperature Reference Current vs. Ambient Temperature 1.242 0.18 VKA=VREF IKA=10mA 1.241 R1=10K R2=Infinite IKA=10mA Reference Current (A) Reference Voltage (V) 0.17 1.240 1.239 1.238 1.237 0.16 0.15 0.14 0.13 1.236 1.235 -50 -25 0 25 50 75 100 125 0.12 -50 150 -25 o 0 25 50 75 100 125 o Ambient Temperature ( C) Ambient Temperature ( C) Cathode Current vs.
PAGE 8
A Product Line of Diodes Incorporated AZ431L Performance Characteristics (Cont.) Dynamic Impedance vs. Frequency Dynamic Impedance () 10 1 IKA=1mA to 100mA 0.1 0.01 1k 10k 100k 1M Frequency (Hz) Pulse Response of Input and Output Voltage Input and output voltage (V) 3 Input 2 1 Output 0 -1 0 1 2 3 4 5 6 Time (S) Ratio of Delta Reference Voltage to the Ratio of Cathode Voltage vs. Ambient Temperature -0.30 IKA=10mA VKA=VREF to 16V Ratio of VREF to VKA (mV/V) -0.35 -0.
PAGE 9
A Product Line of Diodes Incorporated AZ431L Ordering Information AZ431L X X XX - XX Product Name Voltage Tolerance A : 0.5% B : 1.0% Package Packing E1/G1 Z : TO-92 N : SOT-23 K : SOT-23-5 R : SOT-89 TR : Tape & Reel or Ammo Blank : Bulk E1 : Lead Free G1 : Green Diodes IC's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green packages.
PAGE 10
A Product Line of Diodes Incorporated AZ431L Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: TO-92 (Bulk Packing) 1.000(0. 039) 3.430(0. 135) MIN 3.700(0.146) 3.300(0.130) 1.400(0. 055) 0.320(0. 013) 0.510(0. 020) 0. 000(0. 000) 0. 380(0. 015) Φ1. 600(0. 063) MAX 4.700(0.185) 1.270(0. 050) TYP AZ431L Document number: DS36801 Rev. 3 - 2 15.500(0.610) 0.360(0. 014) 0.760(0. 030) 12.500(0.492) 4.300(0.169) 4.400(0. 173) 4.800(0. 189) 2.420(0. 095) 2.660(0.
PAGE 11
A Product Line of Diodes Incorporated AZ431L Package Outline Dimensions (Cont. All dimensions in mm(inch).) (2) Package Type: TO-92 (Ammo Packing) 1. 100(0. 043) 1.270(0. 050) Typ 3. 430(0.135) MIN 3.800(0.150) 2.500(0. 098) 4.000 (0.157 ) 0.000(0.000) 0.380(0.015) Φ1. 600(0. 063) MAX 14.500(0.571) 0. 320(0. 013) 0. 510(0. 020) 12.500(0.492) 3.300(0.130) 1. 400(0. 055) 4.700(0.185) 4.300(0.169) 4.400(0. 173) 4.800 (0.189 ) 13.000(0. 512) 15.000 (0.591 ) 0.380(0.015) 0.550(0.022 ) 2.540(0.
PAGE 12
A Product Line of Diodes Incorporated AZ431L Package Outline Dimensions (Cont. All dimensions in mm(inch).) (3) Package Type: SOT-23 3.0 ° 7.0° 0.500(0.020) 0.700(0.028) 2.0° 1.050(0.041)REF 0.0°~10.0° 0.010(0.0004) 0.100(0.004) 0.200(0.008)MIN Document number: DS36801 Rev. 3 - 2 7.0° 0.080(0.003) 0.180(0.007) 0.550(0.022)REF 1.200(0.047) 1.400(0.055) 2.300(0.091) 2.500(0.098) AZ431L R0.100(0.004) 0.900(0.035) 1.100(0.043) 2.800(0.110) 3.000(0.118) 0.890(0.035) 1.030(0.041) 0.100(0.
PAGE 13
A Product Line of Diodes Incorporated AZ431L Package Outline Dimensions (Cont. All dimensions in mm(inch).) (4) Package Type: SOT-23-5 0.300(0.012) 0.600(0.024) 0.100(0.004) 0.200(0.008) 1.500(0.059) 1.700(0.067) 3.000(0.118) 2.650(0.104) 2.820(0.111) 3.100(0.122) 0.200(0.008) 0.700(0.028) REF 0.300(0.012) 0.500(0.020) 0° 8° 1.800(0.071) 2.000(0.079) 0.000(0.000) MAX 1.450(0.057) 0.950(0.037) TYP 0.150(0.006) 0.900(0.035) 1.300(0.051) AZ431L Document number: DS36801 Rev.
PAGE 14
A Product Line of Diodes Incorporated AZ431L Package Outline Dimensions (Cont. All dimensions in mm(inch).) (5) Package Type: SOT-89 1.400(0.055) 1.600(0.063) 4.400(0.173) 4.600(0.181) Option 1 2.300(0.091) 2.600(0.102) 3.950(0.156) 4.250(0.167) 2.060(0.081)REF 3 0.900(0.035) 1.200(0.047) 0.350(0.014) 0.450(0.018) 0.320(0.013) 0.540(0.021) 0.480(0.019) 0.620(0.024) 0.320(0.013) 0.540(0.021) 3.000(0.118) TYP 10 3 R0.150(0.006) 10 Option 1 Option 2 1.550(0.061)REF 1.030(0.041)REF R 0.
PAGE 15
A Product Line of Diodes Incorporated AZ431L Suggested Pad Layout (1) Package Type: SOT-23 Grid placement courtyard Y Z G Y X E Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch) Value 2.900/0.114 1.100/0.043 0.800/0.031 0.900/0.035 0.950/0.037 AZ431L Document number: DS36801 Rev. 3 - 2 15 of 18 www.diodes.
PAGE 16
A Product Line of Diodes Incorporated AZ431L Suggested Pad Layout (Cont.) (2) Package Type: SOT-23-5 E2 G Z E1 Y X Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E1 (mm)/(inch) E2 (mm)/(inch) Value 3.600/0.142 1.600/0.063 0.700/0.028 1.000/0.039 0.950/0.037 1.900/0.075 AZ431L Document number: DS36801 Rev. 3 - 2 16 of 18 www.diodes.
PAGE 17
A Product Line of Diodes Incorporated AZ431L Suggested Pad Layout (Cont.) (3) Package Type: SOT-89 X1 Z X2 Y1 Y E X Dimensions Z (mm)/(inch) X (mm)/(inch) X1 (mm)/(inch) X2 (mm)/(inch) Y (mm)/(inch) Y1 (mm)/(inch) E (mm)/(inch) Value 4.600/0.181 0.550/0.022 1.850/0.073 0.800/0.031 1.300/0.051 1.475/0.058 1.500/0.059 AZ431L Document number: DS36801 Rev. 3 - 2 17 of 18 www.diodes.
PAGE 18
A Product Line of Diodes Incorporated AZ431L IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).