TLV431, TLV431A, TLV431B

LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR

SLVS139T − JULY 1996 − REVISED JUNE 2007

1

POST OFFICE BOX 655303

− 0.5% for TLV431B

− 1% for TLV431A

− 1.5% for TLV431

− 4 mV (0

5C to 705C)

− 6 mV (–40

5C to 855C)

− 11 mV (–40

5C to 1255C)

80

µA Typ

Smaller Footprint Than SOT-23-3

− Additional SOT-89 Package

− Multiple Pinouts for SOT-23-3 and SOT-89

Packages

REF

ANODE

CATHODE

LP (TO-92/TO-226) PACKAGE

(TOP VIEW)

NC − No internal connection

* For TLV431, TLV431A: NC − No internal connection

* For TLV431B: Pin 2 is attached to Substrate and

must be connected to ANODE or

left open.

DBV (SOT-23-5) PACKAGE

(TOP VIEW)

1

2

3

5

4

NC

*

CATHODE

ANODE

REF

DBZ (SOT-23-3) PACKAGE

(TOP VIEW)

1

2

3

REF

CATHODE

ANODE

D (SOIC) PACKAGE

(TOP VIEW)

1

2

3

4

8

7

6

5

REF

ANODE

ANODE

NC

CATHODE

ANODE

ANODE

NC

DCK (SC-70) PACKAGE

(TOP VIEW)

1

2

3

6

5

4

CATHODE

NC

REF

ANODE

NC

NC

NC − No internal connection

PK (SOT-89) PACKAGE

(TOP VIEW)

1

3

2

REF

CATHODE

ANODE

ANODE

description/ordering information

The TLV431 is a low-voltage 3-terminal adjustable voltage reference with specified thermal stability over

(1.24 V) and 6 V with two external resistors (see Figure 2). These devices operate from a lower voltage

(1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLV431 is an ideal voltage reference in isolated feedback circuits for 3-V

to 3.3-V switching-mode power supplies. These devices have a typical output impedance of 0.25

Ω. Active

output circuitry provides a very sharp turn-on characteristic, making them excellent replacements for

low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright

 2007, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.