ZR431C01STOB [DIODES]

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型号：	ZR431C01STOB
厂家：	DIODES INCORPORATED
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ADJ USTABLE PRECISION

ZENER SHUNT REGULATOR

ISSUE 5 – DECEMBER 2002

ZR431

DEVICE DESCRIPTION

FEATURES

The ZR431 is a three term inal adjustable

s h u n t r e g u la t o r o ffe r in g e x c e lle n t

te m perature stability and output current

handling capability up to 100m A. The output

voltage m ay be set to any chosen voltage

between 2.5 and 20 volts by selection of two

external divider resistors.

Surface m ount SOT223 and SOT23

packages

•

TO92 package

•

2%, 1 % and 0.5% tolerance

Max. tem perature coefficient 55 ppm /°C

Tem perature com pensated for operation

over the full tem perature range

The devices can be used as a replacem ent

fo r ze n e r d io d e s in m a n y a p p lica tio n s

r e q u ir in g a n im p r o v e m e n t in ze n e r

perform ance.

Program m able output voltage

50µA to 100m A current sink capability

Low output noise

•

APPLICATIONS

Shunt regulator

•

Series regulator

•

Voltage m onitor

•

Over voltage/ under voltage protection

•

Switch m ode power supplies

•

SCHEMATIC DIAGRAM

V_Z

ref

G_nd

4-189

ZR431

ABSOLUTE MAXIMUM RATING

Cathode Voltage (V_Z)

Cathode Current

Operating Tem perature

Storage Tem perature

20V

Pow er Dissipation (T_{am b}=25°C,T_{jm ax}=150°C)

150m A

SOT23

TO92

330m W

780m W

-40 to 85°C

-55 to 125°C

SOT223

Recom m ended Operating Conditions

Min

Vref 20V

50µA 100m A

Max

Cathode Voltage

Cathode Current

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

2.487 2.50 2.513

I_L=10m A (Fig1), V_Z=V_ref

⁽¹⁾0.5%

Deviation of Reference Input V_dev

Voltage over Temperature

8.0

m V

I_L=10m A, 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 m V/V V_Zfrom V_refto 10V

I_Z=10m A (Fig2)

∆V_ref

∆V_Z

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

I_Z=10m A (Fig2)

Reference Input Current

I_ref

0.12 1.0

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

(Fig2)

µA

Deviation of Reference

Input Current over

Tem perature

0.04 0.2

R1=10k, R2=O/C, I_L=10m A

T_a=full range (Fig2)

∆I

ref

µA

Minim um Cathode

Current for Regulation

I_{Zm in}

I_Zoff

V_Z=V_ref(Fig1)

µA

Off-state Current

0.1

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

V_Z=V_ref(Fig1), f=0Hz

µA

Dynam ic Output Im pedance R_Z

⁽¹⁾0.5% SOT23 only.

0.75

Ω

For definitions of reference voltage tem perature coefficient and dynam ic output im pedance see

NOTES following DC TEST CIRCUITS

4-190

ZR431

TYPICAL CHARACTERISTICS

160

150

140

130

120

110

100

IZ=10m A

ref=V

IZ=10m A

-5

-10

-15

-20

-25

-40

-20

Tem perature (°C)

Cathode Voltage (V)

Change in Vr v Cathode Voltage

Reference Current v Temperature

100

Vref=VZ

V^ref=V

1m A

10m A

1.0

0.1

100

10k

100k

-40

-20

Frequency (Hz)

Tem perature (°C)

Dynamic Impedance v Frequency

Cathode Current v Temperature

2.506

2.504

I =10m A

SOT223

2.502

2.500

2.498

TO92

2.496

2.494

2.492

2.490

SOT23

-40

-20

Tem perature (°C)

Reference Voltage v Temperature

4-191

ZR431

TYPICAL CHARACTERISTICS

V^Z

I^Z

230

15k

9µF

8k25

100

10k

100k

Frequency (Hz)

= 10m A, T = 25°C

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

Tim e (µs)

TA = 25°C

Pulse Response

Test Circuit for Pulse Response

100

Input

150

V^Z

STABLE

10k

10p

100p

1000p

0.01

0.1

Load Capacitance (F)

Vref < VZ < 20, IZ = 10m A, 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

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

OVER VOLTAGE / UNDER VOLTAGE

COMPENSATED THRESHOLD

4-193

ZR431

DC TEST CIRCUITS

I^L

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 m axim um variation of the reference

input voltage over the full tem perature range.

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

Vm ax

V_devx 1000000

V_ref(ppm ⁄ °C)=

V_ref(T1−T2)

The dynam ic output im pedance, Rz, is defined as:

∆V_Z

Vm in

R_Z

∆I_Z

Vdev = Vm ax - Vm in

Whe n th e d e vice is p ro g ra m m e d w ith tw o e xte rna l

re s is tors, R1 a nd R2, (fig 2) , the dynam ic output

im pedance of the overall circuit, R’, is defined as:

R’=R_z(1+

)

4-194

ZR431

CONNECTION DIAGRAMS

TO92 Package Suffix – C

SOT223 Package Suffix – G

Bottom View

Top View

–

Pin 4 floating or connected to pin 2

SOT23 Package Suffix – F

Top View

ORDERING INFORMATION

Part Num ber Package Tol. Part Mark

ZR431C01

ZR431C

TO92

1.0

2.0

ZR43101

ZR431

ZR43101

ZR431

43R

ZR431G01

ZR431G

SOT223 1.0

SOT223 2.0

ZR431F005

ZR431F01

ZR431F

SOT23

0.5

1.0

2.0

43B

43A

4-195

ZR431C01STOB [DIODES]

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