NOT RECOMMENDED FOR NEW DESIGN NO ALTERNATE PART
AZ432
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
Description
Features
The AZ432 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.
Wide Programmable Precise Output Voltage from 1.25V to 18V
High Stability under Capacitive Load
The output voltage can be set to any value between 1.25V and 18V
with two external resistors.
The AZ432 precision reference is offered in two voltage tolerance:
0.5% and 1.0%.
Low Temperature Deviation: 3mV Typical
Low Equivalent Full-Range Temperature Coefficient: 20PPM/°C
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°C
Applications
These ICs are available in 4 packages: TO-92 (bulk or ammo
packing), SOT-23, SOT-23-5 and SOT-89.
Graphic Card
PC Motherboard
Voltage Adapter
Switching Power Supply
Charger
Pin Assignments
(Top View)
(Top View)
(Top View)
ANODE
3
CATHODE
3
CATHODE
2
ANODE
2
ANODE
1
REF
1 REF
TO-92 (Bulk Packing)
1
*
2
CATHODE
3
(Note 1)
5
ANODE
4
REF
Note 1:
2
REF
CATHODE
SOT-23
(Top View)
(Top View)
1
2
3
REF ANODE CATHODE
SOT-23-5
1
TO-92 (Ammo Packing)
(Top View)
NC
3
SOT-89 (Option 1)
1
2
3
REF ANODE CATHODE
SOT-89 (Option 2)
*Pin 2 is attached to substrate and must be connected to ANODE or open.
AZ432
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AZ432
Typical Applications Circuit
R3
VOUT
VIN
R1
VOUT = (1+R1/R2)*VREF
VREF
AZ432
R2
Shunt Regulator
VIN
VOUT
R1
R4
R2
VOUT = (1+R2/R3)*VREF
VREF
AZ432
R3
High Current Shunt Regulator
R2
VIN
IOUT
R1
IOUT = VREF/R2+ IKA
AZ432
Current Source or Current Limit
AZ432
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AZ432
Typical Applications Circuit (Cont.)
VIN
AZ1117
R1
8.2K
2.5V/1A
R2
250
AZ432
R3
250
Precision 2.5V/1A Regulator
R3
C1
R4
VOUT
R2 680
R5
R1
U2
Q1
3
COMP
C2
2
AZ432
PWM Controller
VFB
4
PS521
PWM Converter with Reference
AZ432
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AZ432
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
°C
-65 to +150
°C
Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Symbol
Parameter
Min
Max
Unit
VKA
Cathode Voltage
VREF
18
V
IKA
Cathode Current
0.1
100
mA
—
Operating Ambient Temperature Range
-40
+125
°C
AZ432
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AZ432
Electrical Characteristics (Typical and limits apply for TA = +25°C, unless otherwise noted.)
Symbol
Parameter
Test
Circuit
Conditions
Min
Typ
Max
1.244
1.250
1.256
1.238
1.250
1.262
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
1.0%
∆VREF
∆VREF
∆VKA
Deviation of Reference Voltage
Over Full Temperature Range
Ratio of Change in VREF to the
Change in Cathode Voltage
4
VKA = VREF,
IKA = 10mA
Unit
V
mV
5
IKA = 10mA,
∆VKA: VREF to 16V
—
-0.5
-1.5
mV/V
IREF
Reference Input Current
5
IKA = 10mA, R1 = 10kΩ, R2 = ∞
—
0.15
0.4
µA
∆IREF
Deviation of Reference Current
Over Full Temperature Range
5
IKA = 10mA, R1 = 10kΩ, R2 = ∞,
TA = -40 to +125°C
—
0.1
0.4
µA
Minimum Cathode Current for
Regulation
4
VKA = VREF
—
55
80
µA
VREF = 0, VKA = 18V
—
0.04
0.10
Off-state Cathode Current
6
VKA = 6V, VREF = 0
—
0.01
0.05
—
0.05
0.15
SOT-23
—
84.84
—
SOT-23-5
—
84.84
—
TO-92
—
140.80
—
SOT-89
—
29.80
—
IKA
(Min)
IKA
(Off)
ZKA
θJC
Dynamic Impedance
Thermal Resistance
(Junction to Case)
AZ432
Document number: DS36803 Rev. 4 - 3
4
µA
VKA = VREF, IKA = 1 to 100mA,
f ≤ 1.0kHz
—
Ω
°C/W
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AZ432
Electrical Characteristics (Cont.)
Test Circuit 4 for VKA = VREF
Test Circuit 5 for VKA > VREF
Test Circuit 6 for IOFF
AZ432
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AZ432
Performance Characteristics
Reference Voltage vs. Ambient Temperature
Reference Current vs. Ambient Temperature
1.253
0.18
VKA=VREF
IKA=10mA
1.251
1.250
1.249
1.248
1.247
-50
R1=10K
R2=Infinite
IKA=10mA
0.17
Reference Current (A)
Reference Voltage (V)
1.252
0.16
0.15
0.14
0.13
-25
0
25
50
75
100
125
0.12
-50
150
-25
o
25
50
75
100
Ambient Temperature ( C)
Cathode Current vs. Cathode Voltage
Cathode Current vs. Cathode Voltage
400
150
VKA=VREF
100
VKA=VREF
300
o
o
TA=25 C
TA=25 C
Cathode Current (A)
Cathode Current (mA)
0
o
Ambient Temperature ( C)
50
0
-50
200
100
0
-100
-200
-100
-300
-150
-1
0
-1.0
1
-0.5
Cathode Voltage (V)
0.0
0.5
1.0
1.5
Cathode Voltage (V)
Small Signal Voltage Gain vs. Frequency
Output
70
0
TA=25 C
IKA=10mA
60
6.8K
360
50
Voltage Gain (dB)
I KA
10F
40
30
20
10
4.3K
0
-10
1k
10k
100k
GND
Small Signal Frequency (Hz)
AZ432
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AZ432
Performance Characteristics (Cont.)
Dynamic Impedance vs. Frequency
10
Output
100
IKA
Impedance ()
1
50
0.1
0.01
1k
10k
100k
GND
1M
Frequency (Hz)
Pulse Response of Input and Output Voltage
Output
Input and Output Voltage (V)
3
R1
1.8K
Input
Pulse
Generator
f=100KHz
2
1
R2
50
Output
GND
0
-1
0
1
2
3
4
5
6
Time (S)
Ratio of Delta Reference Voltage to the Ratio of Delta
Cathode Voltage vs. Ambient Temperature
Ratio of VREF to VKA (mV/V)
-0.3
IKA=10mA
VKA=VREF to 16V
-0.4
-0.5
-40
0
40
80
120
o
Ambient Temperature ( C)
AZ432
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AZ432
Ordering Information
AZ432 X X X - X
Product Name
Bandage 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 : RoHS Compliant
G1 : RoHS Compliant
and Green
Part Number
Package
TO-92
SOT-23
SOT-23-5
SOT-89
Temperature
Range
Voltage
Tolerance
RoHS
Compliant
RoHS
Compliant and
Green
Marking ID
RoHS
Compliant
RoHS
Compliant
and Green
Packing
0.5%
AZ432AZ-E1
AZ432AZ-G1
AZ432AZ-E1
AZ432AZ-G1
Bulk
0.5%
AZ432AZTR-E1
AZ432AZTR-G1
AZ432AZ-E1
AZ432AZ-G1
Ammo
1.0%
AZ432BZ-E1
AZ432BZ-G1
AZ432BZ-E1
AZ432BZ-G1
Bulk
1.0%
AZ432BZTR-E1
AZ432BZTR-G1
AZ432BZ-E1
AZ432BZ-G1
Ammo
0.5%
AZ432ANTR-E1
AZ432ANTR-G1
EA8
GA8
Tape &
Reel
1.0%
AZ432BNTR-E1
AZ432BNTR-G1
EA9
GA9
Tape &
Reel
0.5%
AZ432AKTR-E1
AZ432AKTR-G1
E7A
G7A
Tape &
Reel
1.0%
AZ432BKTR-E1
AZ432BKTR-G1
E8A
G8A
Tape &
Reel
0.5%
AZ432ARTR-E1
AZ432ARTR-G1
E42A
G42A
Tape &
Reel
1.0%
AZ432BRTR-E1
AZ432BRTR-G1
E42B
G42B
Tape &
Reel
-40 to +125°C
-40 to +125°C
-40 to +125°C
-40 to +125°C
AZ432
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AZ432
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
AZ432
Document number: DS36803 Rev. 4 - 3
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(0.105)
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AZ432
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(0.100)
Typ
AZ432
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AZ432
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: DS36803 Rev. 4 - 3
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)
AZ432
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(0.004) GAUGE PLANE
4×R0.100(0.004)
0.300(0.012)
0.510(0.020)
1.900(0.075)REF
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AZ432
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)
AZ432
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AZ432
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 0.200(0.008)
0.320(0.013)REF
45
AZ432
Document number: DS36803 Rev. 4 - 3
2.630(0.104)
2.930(0.115)
1.620(0.064)REF
2.210(0.087)REF
1.500(0.059)
1.620(0.064)
1.800(0.071)
1.830(0.072)
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AZ432
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
AZ432
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AZ432
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
AZ432
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AZ432
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
AZ432
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AZ432
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).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, 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 © 2018, Diodes Incorporated
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AZ432
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