AP431SANTR-G1 datasheet, PDF - EEWORLD Datasheet

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AP431S

LOW CATHODE CURRENT ADJUSTABLE PRECISION SHUNT REGULATOR

Description

The AP431S is a 3-terminal adjustable shunt regulator with

guaranteed thermal stability over a full operation range. It features

sharp turn-on characteristics, low temperature coefficient and low

output impedance, which makes it ideal substitute for Zener diode in

applications such as switching power supply, charger and other

adjustable regulators.

The AP431S has the same electrical specifications as the industry

standard 431 except that it features a low minimum cathode current

for regulation. The typical value of 50μA makes the parts ideal for

very low power dissipation applications.

The output voltage of AP431S can be set to any value between V

REF

(2.5V/2.495V) and the corresponding maximum cathode voltage

(36V).

The AP431S is offered in two grade initial voltage tolerance at +25°

C,

0.5% and 1%.

This IC is available in 3 packages: TO92 (ammo packing), SOT23

and SOT89.

Pin Assignments

(Top View)

ANODE

3

(Top View)

ANODE

3

NEW PRODUCT

1

REF

2

CATHODE

1

CATHODE

2

REF

SOT23 (Package Code: N)

(Top View)

SOT23 (Package Code: N1)

(Top View)

1

2

3

1

2

3

REF ANODE CATHODE

Features





Low Minimum Cathode Current for Regulation: 50μA (Typ.),

100μA (Max.)

Programmable Precise Output Voltage from 2.5V/2.495V to 36V

High Stability Under Capacitive Load

Low Deviation of Reference Voltage Over Full Temperature

Range: 11mV Typical (-40° to +125°

C

C)

Sink Current Capacity from 100µA to 100mA

Low Dynamic Impedance: 0.1Ω (Typ.)

Wide Operating Temperature Range: -40C to +125°

C

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)

SOT89 (Option 1)

(Top View)

REF ANODE CATHODE

SOT89 (Option 2)

TO92 (Ammo Packing)

Applications



Charger

Voltage Adapter

Switching Power Supply

Graphic Card

Precision Voltage Reference

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

AP431S

Document number: DS39195 Rev. 1 - 2

1 of 17

www.diodes.com

January 2017

AP431S

Typical Applications Circuit

AP431S

V

OUT

=(1+R1/R2) x V

REF

NEW PRODUCT

Shunt Regulator

V

OUT

=(1+R2/R3) x V

REF

AP431S

High Current Shunt Regulator

I

OUT

=V

REF

/R2+I

KA

AP431S

Current Source or Current Limit

AP431S

Document number: DS39195 Rev. 1 - 2

2 of 17

www.diodes.com

January 2017

AP431S

Typical Applications Circuit

(Cont.)

NEW PRODUCT

AP431S

Precision 5V 1A Regulator

AP431S

PWM Converter with Reference

AP431S

Document number: DS39195 Rev. 1 - 2

3 of 17

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January 2017

AP431S

Functional Block Diagram

CATHODE

REF

+

NEW PRODUCT

-

V

REF

ANODE

Absolute Maximum Ratings

(Note 4)

Symbol

V

KA

I

KA

I

REF

Cathode Voltage

Cathode Current Range (Continuous)

Reference Input Current Range

TO92

P

D

Power Dissipation

SOT89

SOT23

T

J

T

STG

ESD

Note 4:

Parameter

Rating

40

-100 to 150

10

750

350

+150

-65 to +150

5,500

300

Unit

V

mA

mW

Junction Temperature

Storage Temperature Range

ESD (Human Body Model)

ESD (Machine Model)

°

C

°

C

V

Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.

Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.

Recommended Operating Conditions

Symbol

V

KA

I

KA

T

A

Cathode Voltage

Cathode Current

Operating Ambient Temperature Range

Parameter

Min

V

REF

0.1

-40

Max

36

100

+125

Unit

V

mA

°

C

AP431S

Document number: DS39195 Rev. 1 - 2

4 of 17

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January 2017

AP431S

Electrical Characteristics

(T

A

= +25° unless otherwise specified.)

C,

Symbol

Parameter

Test

Circuit

Conditions

V

KA

= V

REF,

I

KA

= 1mA (AP431SA)

0.5%

V

REF

Reference

Voltage

1.0%

V

KA

= V

REF,

I

KA

= 1mA (AP431SHA)

4

V

KA

= V

REF,

I

KA

= 1mA (AP431SB)

V

KA

= V

REF,

I

KA

= 1mA (AP431SHB)

Deviation of Reference

Voltage Over Full

Temperature Range

Ratio of Change in

Reference Voltage to the

Change in Cathode

Voltage

Reference Current

Deviation of Reference

Current Over Full

Temperature Range

Minimum Cathode Current

for Regulation

Off-state Cathode Current

Dynamic Impedance

0 to +70°

C

4

V

KA

= V

REF

I

KA

= 1mA

-40 to +85°

C

-40 to +125°

C

V

KA

= 10V to V

REF

5

I

KA

= 1mA

V

KA

= 36V to 10V

2.475

2.470

—

2.500

2.495

3

6

11

-1.0

-0.5

0.2

2.525

2.520

6

10

18

-2.7

mV/V

-2.0

0.5

µA

mV

2.483

2.495

2.507

V

Min

2.487

Typ

2.500

Max

2.512

Unit

NEW PRODUCT

V

REF

V

REF

V

KA

I

REF

I

REF

5

I

KA

= 1mA, R1 = 10kΩ, R2 =



I

KA

= 1mA, R1 = 10kΩ

R2 =



T

A

= -40 to +125°

C

V

KA

= V

REF

V

KA

= 36V, V

REF

= 0

V

KA

= V

REF

,

I

KA

= 1 to 100mA, f

1.0kHz

TO92

5

0.1

0.3

µA

I

KA

(Min)

I

KA

(Off)

Z

KA

4

6

4

—

50

0.05

0.1

80

140

100

1.0

0.3

—

µA

Ω

θ

JC

Thermal Resistance

—

SOT89

SOT23

°

C/W

AP431S

Document number: DS39195 Rev. 1 - 2

5 of 17

www.diodes.com

January 2017

Parameter Name	Attribute value
Output voltage (minimum/fixed)	2.5V
Output current	100mA
Output voltage (maximum)	36V
Input voltage	-
Supply current	-
Output type	Adjustable
Operating temperature	-40°C ~ 125°C(TA)
Temperature Coefficient	-
cathode current	100uA
Accuracy	±0.5%
Reference source type	shunt

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