TLV431A-Q1_16 Datasheet, PDF (1/24 Pages) Texas Instruments – LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR

TLV431AĆQ1, TLV431BĆQ1
LOWĆVOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS
D Qualified for Automotive Applications
D Low-Voltage Operation: V_REF = 1.24 V
D Adjustable Output Voltage, V_O = V_REF to 6 V
D Reference Voltage Tolerances at 255C
− 0.5% for TLV431B
− 1% for TLV431A
D Typical Temperature Drift: 11 mV
SLVS905 − DECEMBER 2008
D Low Operational Cathode Current :80 µA Typ
D 0.25-Ω Typical Output Impedance
D See TLVH431 and TLVH432 for
− Wider V_KA (1.24 V to 18 V) and I_K (80 mA)
− Additional SOT-89 Package
− Multiple Pinouts for SOT-23-3 and SOT-89
Packages
DBV (SOT-23-5) PACKAGE
(TOP VIEW)
DBZ (SOT-23-3) PACKAGE
(TOP VIEW)
NC 1
*2
CATHODE 3
5 ANODE
4 REF
REF 1
CATHODE 2
3 ANODE
NC − No internal connection
* For TLV431A: NC − No internal connection
* For TLV431B: Pin 2 is attached to Substrate and must
be connected to ANODE or left open.
description/ordering information
The TLV431 is a low-voltage 3-terminal adjustable voltage reference with specified thermal stability over
applicable industrial and commercial temperature ranges. Output voltage can be set to any value between V_REF
(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.
ORDERING INFORMATION
TJ
255C VREF
TOLERANCE
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
−40°C to 125°C
0.5%
SOT-23-5 (DBV)
SOT-23-3 (DBZ)
Reel of 3000
Reel of 3000
TLV431BQDBVRQ1 VOMQ
TLV431BQDBZRQ1 VOQQ
1%
SOT-23-5 (DBV) Reel of 3000
TLV431AQDBVRQ1 VONQ
† _{For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see}
the TI web site at http://www.ti.com.
‡ _{Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.}
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.
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.
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