广东肇庆风华新谷微电子有限公司
广东省肇庆市风华路
18
号风华电子工业城三号楼一楼
TEL:0758-2865088 2865091
FAX:0758-2849749
ADJUSTABLE PRECISION SHUNT REGULATORS
精密可调电压基准源
DESCRIPTION & FEATURES
概述及特点
The FH431 series ICs are three-terminal adjustable
shunt 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 and other adjustable
regulators. The FH431 precision reference is offered
in three band gap tolerance: 0.5%,1.0% and 1.5％.
・
Adjustable output voltage from V
REF
to 36V
・
Low dynamic output resistance: 200mΩ typical
・
Sink current capacity from 1mA to 100 mA
・
Low output noise
・
Typical equivalent full range temperature coefficient
of 30ppm/°C
FH431
系列三端可调精密稳压电路，具有½温度系数和
½输出阻抗，这样精密可调的特性½其可替代许多应用
场合下的稳压二极管。例如：开关电源、充电器及可调
稳压器。FH431 参考电压有三种精度：0.5%，1.0%和
1.5％。
FH431
・
・
・
・
・
可调电压范围：2.5V½36V
½动态输出阻抗：200mΩ（典型值）
灌电流½力为
1.0½100mA
½输出噪声
½温度系数：30ppm/°C（典型值）
Applications
应用
・
・
・
・
・
PC Motherboard
Voltage monitor
Voltage Reference
PWM down converter with reference
Charger
・
・
・
・
・
电脑主板
电压监控器
电压基准源
开关电源（参考电压）
充电器
Ordering Information
订购信息
Package
封装类型
SOT-23
Temperature Range
温度范围
Voltage Tolerance
精度
0.5%
1.0%
1.5%
Part Number
产品型号
FH431MT36-A
FH431MT36-B
FH431MT36-C
Packing Type
包装类型
Tape
Tape
Tape
FH431
Type
产品型号
M
T 36 –A
V
KA
Voltage Tolerance
精度
Packing Type
包装½式
T: Tape
编带
B: Bulk
散装
Package
封装½式
M: SOT-23
Page 0 of 4
*2005
年第
1
版*
All Rights Reserved
广东肇庆风华新谷微电子有限公司
广东省肇庆市风华路
18
号风华电子工业城三号楼一楼
TEL:0758-2865088 2865091
FAX:0758-2849749
TYPICAL APPLICATION
（典型应用）
BLOCK DIAGRAM（功½框图）
MAXIMUM RATINGS (T
a
=25
℃
)
最大额定值
Characteristic
特性参数
Cathode Voltage (Note 2)
阴极电压
Continuous Cathode Current
阴极连续电流
Reference Input Current Range
参考端输入电流
Power Dissipation
耗散功率
Junction Temperature
工½结温
Thermal Impedance (Note 3)
热阻
Storage Temperature Range
储存温度
Symbol
符号
V
KA
I
K
I
REF
P
D
T
J
θ
JA
T
STG
(Note 1)
Rating
额定值
Min
最小
Max
最大
-0.3
-100
-0.05
SOT-23-3/5L
SOT-89-3
0
SOT-23-3
SOT-23-5
SOT-89-3
-65
Unit
单½
V
mA
mA
mW
°C
36
150
10
370
770
150
330
250
100
150
°C / W
°C
Note 1: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground.
Currents are positive into, negative out of the specified terminal.
Note 2: Voltage values are with respect to the anode terminal unless otherwise noted.
Note 3:θJA: Thermal Resistance-Junction to Ambient, D
F
= 1/θJ
A
Junction Temperature Calculation: T
J
= T
A
+ (P
D
×θJ
A
).
The
θJA
numbers are guidelines for the thermal performance of the device/PC-board system.
All of the above assume no ambient airflow.
RECOMMENDED OPERATING CONDITIONS
推荐½用条件
Operating free air temperature range
½用温度范围
Cathode current
阴极电流
Cathode voltage
阴极电压
Symbol
符号
T
A
I
K
V
KA
Min
最小
0
1
0
Max
最大
70
100
36
Unit
单½
°C
mA
V
Page 1 of 4
*2005
年第
1
版*
All Rights Reserved
广东肇庆风华新谷微电子有限公司
广东省肇庆市风华路
18
号风华电子工业城三号楼一楼
TEL:0758-2865088 2865091
FAX:0758-2849749
ELECTRICAL CHARACTERISTICS
电特性
T
A
=25℃ unless otherwise noted
如无特殊说明，温度为
25°C
Parameter
Symbol
Test Conditions
Min.
参数
符号
测试条件
最小值
Reference Input Voltage
输入基准电压
I
K
=10mA, V
KA
=V
REF
, note
1
I
K
=10mA, V
KA
=V
REF
, note
2
I
K
=10mA, V
KA
=V
REF
, note
3
I
K
=10mA, V
KA
=V
REF
,
0°C≤T
A
≤70°C
IK =10mA, V
KA
=2.5V to
10V
I
K
=10mA, V
KA
=10V to 36V
I
K
=10mA, V
KA
=V
REF
I
K
=10mA, V
KA
=V
REF
,
0°C≤T
A
≤70°C
V
KA
=V
REF
V
KA
= 36V,
V
REF
= 0V
V
KA
=
V
REF
,
I
K
= 1mA to 100mA, f
≤
Typ.
典型值
2.500
2.500
2.500
4
-1.4
-1.0
－
2
0.4
0.1
0.2
Max.
最大值
2.513
2.525
2.538
17
-2.7
-2.0
2.3
4
1
1
0.5
Unit
单½
2.487
2.475
2.462
－
－
－
－
－
－
－
－
V
REF
V
Reference Drift
参考电压变化率
Voltage Ratio, Ref to
Cathode阴极电压对参考电
压变化率
Reference Input Current
参考端出入电流
Minimum Operating
Current
最小工½电流
Off-State Cathode Current
关断阴极电流
Dynamic Impedance
动态阻抗
∆V
REF
∆V
REF
∆
V
KA
mV
mV/V
μ
A
mA
I
REF
I
min
I
off
|Z
KA
|
μ
A
Ω
1kHz
Note 1: For FH431A only. The output accuracy is 0.5%.
Note 2: For FH431B only. The output accuracy is 1.0%.
Note 3: For FH431C only. The output accuracy is 1.5%.
Note 4:
∆V
REF
/
∆V
KA
Ratio of change in reference input voltage to the change in cathode voltage.
PARAMETER MEASUREMENT INFORMATION
参数测试图
Page 2 of 4
*2005
年第
1
版*
All Rights Reserved
广东肇庆风华新谷微电子有限公司
广东省肇庆市风华路
18
号风华电子工业城三号楼一楼
TEL:0758-2865088 2865091
FAX:0758-2849749
SOT-23
封装外½尺寸（SOT-23
DIMENSION）
Page 3 of 4
*2005
年第
1
版*
All Rights Reserved
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