ZR431F01 [ZETEX]

ADJUSTABLE PRECISION ZENER SHUNT REGULATOR; 可调式精密齐纳并联稳压器


型号：	ZR431F01
厂家：	ZETEX SEMICONDUCTORS
描述：	ADJUSTABLE PRECISION ZENER SHUNT REGULATOR 可调式精密齐纳并联稳压器稳压器光电二极管输出元件
文件：	总7页 (文件大小：148K)
中文：	中文翻译
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ADJUSTABLE PRECISION

ZENER SHUNT REGULATOR

ISSUE 4 – SEPTEMBER 2000

ZR431

DEVICE DESCRIPTION

FEATURES

The ZR431 is a three terminal adjustable

shunt regulator offering excellent

temperature stability and output current

handling capability up to 100mA. The output

voltage may be set to any chosen voltage

between 2.5 and 20 volts by selection of two

external divider resistors.

Surface mount SO8, SOT223 and

SOT23 packages

TO92 package

2%, 1 % and 0.5% tolerance

Max. temperature coefficient 55 ppm/°C

Temperature compensated for operation

over the full temperature range

The devices can be used as a replacement

for zener diodes in many applications

requiring an improvement in zener

performance.

Programmable output voltage

50 A to 100mA current sink capability

Low output noise

APPLICATIONS

Shunt regulator

Series regulator

Voltage monitor

Over voltage/ under voltage protection

Switch mode power supplies

SCHEMATIC DIAGRAM

V_Z

ref

G_nd

4-189

ZR431

ABSOLUTE MAXIMUM RATING

Cathode Voltage (V_Z)

Cathode Current

20V

150mA

Power Dissipation (T_amb=25°C,T_jmax=150°C)

SOT23

TO92

SOT223

SO8

330mW

780mW

Operating Temperature

Storage Temperature

-40 to 85°C

-55 to 125°C

Recommended Operating Conditions

780mW

Min Max

Cathode Voltage

Cathode Current

Vref 20V

50 A 100mA

ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):T

=25°C

amb

VALUE

SYMBOL

PARAMETER

UNITS CONDITIONS

MIN TYP MAX

Reference Voltage

2% V_ref

2.45 2.50 2.55

2.475 2.50 2.525

2.489 2.50 2.513

I_L=10mA (Fig1), V_Z=V_ref

⁽¹⁾0.5%

Deviation of Reference Input V_dev

Voltage over Temperature

8.0 17

I_L=10mA, V_Z=V_ref

T_a=full range (Fig1)

Ratio of the change in

Reference Voltage to the

Change in Cathode

Voltage

-1.85 -2.7 mV/V V_Zfrom V_refto 10V

I_Z=10mA (Fig2)

V_ref

V_Z

-1.0 -2.0 mV/V V_Zfrom 10V to 20V

I_Z=10mA (Fig2)

Reference Input Current

I_ref

0.12 1.0

R1=10k, R2=O/C, l_L=10mA

(Fig2)

Deviation of Reference

Input Current over

Temperature

0.04 0.2

R1=10k, R2=O/C, I_L=10mA

T_a=full range (Fig2)

I_ref

Minimum Cathode

Current for Regulation

I_Zmin

I_Zoff

V_Z=V_ref(Fig1)

Off-state Current

0.1

V_Z=20V, V_ref=0V (Fig3)

V_Z=V_ref(Fig1), f=0Hz

Dynamic Output Impedance R_Z

⁽¹⁾0.5% SOT23 only.

0.75

For definitions of reference voltage temperature coefficient and dynamic output impedance see

NOTES following DC TEST CIRCUITS

4-190

ZR431

TYPICAL CHARACTERISTICS

160

150

140

130

120

110

100

I^Z=10mA

Vref=VZ

IZ=10mA

-5

-10

-15

-20

-25

-40

-20

Temperature (°C)

Cathode Voltage (V)

Reference Current v Temperature

Change in Vr v Cathode Voltage

100

V^ref=V^Z

Vref=VZ

1mA

10mA

1.0

0.1

100

10k

100k

-40

-20

Frequency (Hz)

Temperature (°C)

Dynamic Impedance v Frequency

Cathode Current v Temperature

2.506

I^Z=10mA

2.504

SOT223

2.502

2.500

2.498

SO8/TO92

SOT23

2.496

2.494

2.492

2.490

-40

-20

Temperature (°C)

Reference Voltage v Temperature

4-191

ZR431

TYPICAL CHARACTERISTICS

V^Z

I^Z

230

15k

8k25

100

10k

100k

IZ = 10mA, TA = 25°C

Frequency (Hz)

Gain v Frequency

Test Circuit for Open Loop Voltage Gain

220

Input Monitor

3.0

Repetitive pulse

2.0

Single pulse

1.0

Pulse

Generator

5.0

INPUT

0.2

0.4

0.6

0.8

1.0

Time ( s)

TA = 25°C

Pulse Response

Test Circuit for Pulse Response

100

Input

150

V^Z

I^Z

STABLE

10k

10p

100p

1000p

0.01

0.1

Load Capacitance (F)

Vref < VZ < 20, IZ = 10mA, TA = 25°C

Test Circuit for Stability Boundary Conditions

Stability Boundary Conditions

4-192

ZR431

APPLICATION CIRCUITS

V+

Vout

V+

Vout

Vref

1 +

Vref

Vout =

Vout = 1 +

Vref

SHUNT REGULATOR

HIGHER CURRENT SHUNT REGULATOR

V+

ZSR***

V+

Vout

Out

Common

0.01µF

Vref

Vout

Vref

Vout_MIN= Vref + Vreg

Vout = 1 +

Vref

Vout = 1 +

Vref

OUTPUT CONTROL OF A

THREE TERMINAL FIXED REGULATOR

SERIES REGULATOR

V+

R1A

R1B

OUTPUT

INPUT

Vref

OUTPUT

V _on

V _off

Vref

R2A

= V+

R2B

= 2.5V

V_TH

R1B

Vref

1 +

Low limit =

High limit =

R2B

R1A

Vref

R2A

SINGLE SUPPLY COMPARATOR

WITH TEMPERATURE

COMPENSATED THRESHOLD

OVER VOLTAGE / UNDER VOLTAGE

4-193

ZR431

DC TEST CIRCUITS

Input

V _Z

Input

I_zoff

Fig 3 – Test Circuit for Off

Fig 1 – Test Circuit for V_z=V_ref

Fig 2 – Test Circuit for V_z>V_ref

State current

NOTES

Deviation of reference input voltage, V_dev,is defined as the maximum variation of the reference

input voltage over the full temperature range.

The average temperature coefficient of the reference input voltage, V_refis defined as:

Vmax

V_devx 1000000

V_refppm °C

V_refT1 T2

The dynamic output impedance, Rz, is defined as:

V_Z

Vmin

R_Z

I_Z

Vdev = Vmax - Vmin

When the device is programmed with two external

resistors, R1 and R2, (fig 2) , the dynamic output

impedance of the overall circuit, R’, is defined as:

R’ R_z

4-194

ZR431

CONNECTION DIAGRAMS

SO8 Package Suffix – N8

SOT223 Package Suffix – G

Top View

Top View –

Pin 4 floating or connected to pin 2

SOT23 Package Suffix – F

TO92 Package Suffix – C

Top View

Bottom View

ORDERING INFORMATION

Part Number Package Tol. Part Mark

ZR431C01

ZR431C

TO92

1.0 ZR43101

2.0 ZR431

ZR431G01

ZR431G

SOT223 1.0 ZR43101

SOT223 2.0 ZR431

ZR431F005

ZR431F01

ZR431F

SOT23

SO8

0.5 43R

1.0 43B

2.0 43A

ZR431N801

ZR431N8

1.0 ZR43101

2.0 ZR431

SO8

4-195

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