SS431GNBTR [SSC]

Adjustable Precision Shunt Regulator; 可调式精密并联稳压器


型号：	SS431GNBTR
厂家：	SILICON STANDARD CORP.
描述：	Adjustable Precision Shunt Regulator 可调式精密并联稳压器稳压器
文件：	总7页 (文件大小：279K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SS431/G

Adjustable Precision Shunt Regulator

DESCRIPTION

FEATURES

Low voltage operation (2.5V)

The SS431 is a low-voltage three-terminal adjustable shunt

regulator with a guaranteed thermal stability over the applicable

Adjustable output voltage from VO = V REF to 18V

Wide operating current range from 0.4mA to 100mA

temperature range. The output voltage can be set to any value

between V_REF(approximately 2.5V) to 18V with two external

resistors (see application circuit). This device has a typical output

impedance of 0.2 ohms. Active output circuitry provides very sharp

turn-on characteristics, making this device an excellent

replacement for Zener diodes in many applications.

Low dynamic output impedance 0.5Ω max.

ESD rating is 5.5kV (per MIL-STD 883D)

Pb-free lead finish available.

APPLICATIONS

Linear Regulators

Adjustable Supplies

Switching Power Supplies

Battery Operated Computers

Instrumentation

The SS431 is characterized for operation from 0°C to 105°C,

and three package options (SOT-23, SOT-89, and TO-92) allow

the designer the opportunity to select the proper package for his

application. The SS431 is available with a Pb-free lead finish

Computer Disk Drives

- order as SS431Gxx.

PIN CONFIGURATION

BLOCK DIAGRAM

SOT-23 (Top view)

Cathode

Ref

Anode

Reference

Vref

SOT-89 (Top view)

Anode

Cathode

Anode

Reference

TO-92 (Top view)

SYMBOL

Cathode

Anode

Cathode

Reference

Ref.

Anode

Rev.2.02 3/11/2004

www.SiliconStandard.com

1 of 7

SS431/G

ABSOLUTE MAXIMUM RATINGS over ambient temp.range.

Parameter

Symbol

Maximum

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Units

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ELECTRICAL CHARACTERISTICS

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Rev.2.02 3/11/2004

www.SiliconStandard.com

2 of 7

SS431/G

TYPICAL PERFORMANCE CHARACTERISTICS

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ꢁꢃꢃ

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ꢃ

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Rev.2.02 3/11/2004

www.SiliconStandard.com

3 of 7

SS431/G

TEST CIRCUITS

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ꢀ _ꢁꢂꢂ

ꢀ_ꢀꢁ

ꢄ_ꢀꢁ

ꢍꢎ

ꢄꢁꢂꢃ

ꢌꢀꢁꢂ

ꢀꢁꢂꢃ

ꢍꢏ

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ꢀꢁꢂꢃꢄꢅꢆꢇꢈꢉꢆꢃꢄꢊꢋꢄ

_ꢉꢇꢃꢍꢄꢌꢇꢁꢎꢄ

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ꢌ

ꢒꢎꢎꢄꢓꢃꢔꢃꢁꢄꢅꢉꢇꢇꢁꢕꢃꢄ

APPLICATION INFORMATION

Where:

T T =full temperature change.

V_MAX

a V_REFcan be positive or negative depending on

whether the slope is positive or negative.

V_DEV= V_MAX-V_MIN

V_MIN

Example: V_DEV= 7.0mV, V_REF= 2495mV,

T T = 105°C, slope is negative.

7.0mV

ê_2495mV

ù₁₀

aVREF =

= - 27ppm/°C

105°C

T₁

T₂

TEMPERATURE

Note 4. The dynamic output impedance, R , is de-

fined as:

Deviation of reference input voltage, V _DEV, is defined as

the maximum variation of the reference input voltage

over the full temperature range.

DV^Z

R_Z=

DI^Z

When the device is programmed with two external re-

sistors, R1 and R2, (see Fig. 2), the dynamic output

impedance of the overall circuit, is defined as:

The average temperature coefficient of the reference in-

put voltage, a V_REFis defined as:

VMAX - VMIN

VREF(at 25°C)

T2 - T1

VDEV

VREF(at 25°C)

T2 - T1

rz =

@ Rz

[

]

ppm

DVREF

°C

Rev.2.02 3/11/2004

www.SiliconStandard.com

4 of 7

SS431/G

APPLICATION EXAMPLES

V_IN

OUT

SS431

R_S

SS431

I_OUT=V_REF/ R_CL

I_OUT=V_REF/R_S

Current Limiter or Current Source

Constant-Current Sink

V_IN

R_IN

V_OUT

FUSE

OUT

SS431

V_OUT@ (1+R1/R2) x V_REF

V_LIMIT@ (1+R1/R2) x V_REF

Higher-Current Shunt Regulator

Crow Bar

R1A

R2A

R1B

SS431

Output turns ON when

Low Limit <V < High Limit

SS431

R2B

Low Limit@ V_REF( 1+ R1B/ R2B )+ V_BE

High Limit @ V_REF( 1+ R1A/ R2A )

Over-Voltage/Under-Voltage Protection Circuit

Rev.2.02 3/11/2004

www.SiliconStandard.com

5 of 7

SS431/G

PHYSICAL DIMENSIONS SOT-23

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SOT-89

ꢈꢁ

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ꢒꢌꢏꢐꢀ

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ꢒꢌꢎꢍꢀ

ꢍꢌꢋꢒꢀ

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ꢄꢀ

ꢑꢀ

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ꢕꢀ

ꢗꢀ

ꢙꢀ

ꢛꢀ

ꢇꢀ

ꢃꢁ

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Rev.2.02 3/11/2004

www.SiliconStandard.com

6 of 7

SS431/G

PHYSICAL DIMENSIONS TO-92

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ꢏꢋꢊꢑ

ꢓ

ꢀꢁꢂꢃꢄꢅ

ꢈ

ꢈꢏ

ꢒ

ꢂ

ꢔꢋꢊꢕ

ꢌꢋꢍꢐ

ꢌꢋꢐꢗ

ꢌꢋꢍꢑ

ꢏꢋꢐꢑ

ꢖꢏ

ꢖ

ꢘ

ꢌꢋꢐꢑ

ꢌꢋꢏꢌ

ꢌꢋꢊꢐ

ꢓ

ꢌꢋꢑꢕ

ꢌꢋꢌꢍ

ꢌꢋꢕꢊ

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ꢁꢂꢀꢃꢄꢅꢆ

ꢇꢈꢀꢅꢂ

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ꢏꢊꢋꢌꢗ ꢏꢌꢋꢔꢔ

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ORDERING INFORMATION

SS431(G)xBxx

TR: Tape and Reel Packing

Bandgap tolerance

B = 1%

Package type

N = SOT-23-3

T = TO-92

G = SOT-89

Lead finish option: G for Pb-free lead finish

Example: SS431GNBTR

SS431 with 1% tolerance in SOT-23-3 with pb-free lead

finish shipped on tape and reel

Information furnished by Silicon Standard Corporation is believed to be accurate and reliable. However, Silicon Standard Corporation makes no

guarantee or warranty, express or implied, as to the reliability, accuracy, timeliness or completeness of such information and assumes no

responsibility for its use, or for infringement of any patent or other intellectual property rights of third parties that may result from its

use. Silicon Standard reserves the right to make changes as it deems necessary to any products described herein for any reason, including

without limitation enhancement in reliability, functionality or design. No license is granted, whether expressly or by implication, in relation to

the use of any products described herein or to the use of any information provided herein, under any patent or other intellectual property rights of

Silicon Standard Corporation or any third parties.

Rev.2.02 3/11/2004

www.SiliconStandard.com

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SS431GNBTR [SSC]

相关型号：

SS431GTB

SS431GTBTR

SS431NB

SS431NBTR

SS431P

SS431TB

SS431TBTR

SS432G

SS432GGB

SS432GGBTR

SS432GNB

SS432GNBTR