ACE431S
Adjustable Precision Shunt Regulator
Description
The ACE431S is a low voltage three terminal adjustable shunt regulator with a guaranteed thermal
stability over applicable temperature ranges. The output voltage can be set to any value between VREF
(approximately 2.5 V) to 18V with two external resistors. This device has a typical output impedance of
0.08Ω. Active output circuitry provides a very sharp turn on characteristic, making this device excellent
replacement for Zener diodes in many applications.
The ACE431S is characterized for operation from -40 OC to 125 OC , and five package options (SOT-23-3,
SOT-23-5, SOP-8, TO-92 and SOT-89-3) allow the designer the opportunity to select the proper package
for their applications.
Features
● Low voltage operation (2.5V)
● Adjustable output voltage V0=VREF to 18V
● Wide operating current range 150μA to 80mA
● Low dynamic output impedance 0.08Ω (Typ)
● Trimmed bandgap design up to +0.5%
● ESD rating is 6KV (Per MIL-STD-883D)
● ROHS Compliant and 100% Lead (Pb)-Free
Application
●
●
●
●
●
●
Linear Regulators
Adjustable Supplies
Switching Power Supplies
Battery Operated Computers
Instrumentation
Computer Disk Drives
Absolute Maximum Ratings
Parameter
Symbol
Max
Unit
Cathode Voltage
VKA
18
V
Continuous Cathode Current
IKA
90
mA
Reference Current
IREF
1
mA
Operating Junction Temperature Range
TJ
150
O
C
Storage Temperature Range
TSTG
-65 to 150
O
C
SOT-89-3 120
SOT-23-3 230
Thermal Resistance
θJA
SOT-23-5 230 OC/W
SOP-8 150
TO-92
220
VER 1.5
1
ACE431S
Adjustable Precision Shunt Regulator
Packaging Type
SOP-8
1
2
3
4
SOT-23-3
SOT-23-3(A)
3
3
SOT-89-3
8
7
6
5
1
SOT-23-5
5
2
1
2
1
2
3
TO-92
4
3
2
1
1
2
3
Description SOP-8
SOT-23-3 SOT-23-3(A) SOT-89-3 SOT-23-5 TO-92
Cathode
1
2
1
3
3
3
Anode
2.3.6.7
3
3
2
5
2
NC
4.5
Ref
8
1.2
1
2
1
4
1
Ordering information
ACE431S X XX + H
Halogen-free
Pb-free
BM : SOT-23-3
BMA : SOT-23-3(A)
BN : SOT-23-5
AM : SOT-89-3
EP : TO-92
FM : SOP-8
Reference Voltage accuracy :
A : 0.5%
B : 1%
C : 2%
VER 1.5
2
ACE431S
Adjustable Precision Shunt Regulator
Block Diagram
Symbol Diagram
Electrical Characteristics
TA=25℃ unless otherwise specified.
Test
Circuit
Parameter
Symbol
Conditions
VREF
VKA=VREF,
IKA=10mA
0.5%
Reference Voltage
1%
2%
Deviation of reference
voltage over full
temperature range
Ration of change in
reference voltage to the
change in cathode voltage
Minimum cathode current
for Regulation
1
Min
Typ
Max
2483 2495
2507
2470 2495
2520
2445 2495
2545
Units
mV
1
VI(Dev)
VKA=VREF,
IKA=10mA
TA=-40℃ to 85℃
-14
2
IΔVREF/ΔVKAI
IKA=3 mA,
ΔVKA=10V- VREF
0.2
2.7
mV/V
1
IMIN
VKA=VREF
0.15
0.3
mA
Dynamic Impedance
1
ZKA
0.08
0.7
Ω
Reference Current
2
IREF
0.3
4
μA
VKA=VREF, IKA=1 to
80mA, f≦1.0KHz
IKA=10mA,
mV
VER 1.5
3
ACE431S
Adjustable Precision Shunt Regulator
R1=10KΩ, R2=∞
Deviation of Reference
current over Full
Temperature Range
Off-State cathode current
2
II(dev)
3
IOFF
IKA=10mA,
R1=10KΩ, R2=∞,
TA=0 to 125℃
VKA=18V, VREF=0
μA
-0.13
0.4
1.0
μA
Typical Circuit
Test Circuit 1: VKA=VREF
Test Circuit 2: VKA>VREF
Test Circuit 3: Off State Current
VER 1.5
4
ACE431S
Adjustable Precision Shunt Regulator
Application Diagram
ACE431S
Typical Performance Characteristics
Cathode Current vs. Cathode Voltage
Cathode Voltage (V)
Cathode Current vs. Cathode Voltage
Cathode Voltage (V)
VER 1.5
5
ACE431S
Adjustable Precision Shunt Regulator
Reference Voltage vs. Junction Temperature
Stability Boundry Conditions
Temperature (℃)
Load Capacitance /pf
Thermal Consideration
Power Rating Power Rating Power Rating
(TA=25℃)
(TA=50℃)
(TA=70℃)
SOT-23-3 (θJA=230℃/W)
435mW
326mW
239mW
Package
SOT-23-5 (θJA=230℃/W)
TO-92
(θJA=220℃/W)
435mW
326mW
239mW
455mW
341mW
250mW
1.
Maximum junction temperature is 125℃
2.
θJA is measured with packages mounted onboard under still-air condition with 1W power applied.
3.
Power rating is calculated using PD=(TJ-TA)/ θJA, where TJ denotes junction temperature and TA denotes ambient
temperature.
VER 1.5
6
ACE431S
Adjustable Precision Shunt Regulator
Packing Information
TO-92
VER 1.5
7
ACE431S
Adjustable Precision Shunt Regulator
Packing Information
SOT-23-3
VER 1.5
8
ACE431S
Adjustable Precision Shunt Regulator
Packing Information
SOT-23-5
VER 1.5
9
ACE431S
Adjustable Precision Shunt Regulator
Packing Information
SOT-89-3
VER 1.5
10
ACE431S
Adjustable Precision Shunt Regulator
Packing Information
SOP-8
VER 1.5
11
ACE431S
Adjustable Precision Shunt Regulator
Notes
ACE does not assume any responsibility for use as critical components in life support devices or systems
without the express written approval of the president and general counsel of ACE Electronics Co., LTD.
As sued herein:
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and shoes failure to perform when properly used in
accordance with instructions for use provided in the labeling, can be reasonably expected to result in
a significant injury to the user.
2. A critical component is any component of a life support device or system whose failure to perform can
be reasonably expected to cause the failure of the life support device or system, or to affect its safety
or effectiveness.
ACE Technology Co., LTD.
http://www.ace-ele.com/
VER 1.5
12
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