TL431 family All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 5 — 01 September 2015 5 of 27
NXP Semiconductors
TL431 family
Adjustable precision shunt regulator
4. Marking
[1] * = placeholder for manufacturing site code.
5. Functional diagram
The TL431 family comprises a range of 3-terminal adjustable shunt regulators, with
specified thermal stability over applicable automotive and commercial temperature
ranges. The output voltage may be set to any value between V
ref
(approximately 2.5 V)
and 36 V with two external resistors (see Figure 8
). These devices have a typical output
impedance of 0.2 . Active output circuitry provides a very sharp turn-on characteristic,
making these devices excellent replacements for Zener diodes in many applications like
on-board regulation, adjustable power supplies and switching power supplies.
Table 5. Marking codes
Type number Marking code
[1]
Type number Marking code
[1]
TL431CDBZR CA* TL431ASDT RL*
TL431IDBZR CB* TL431AMSDT LQ*
TL431QDBZR CC* TL431BCDBZR CG*
TL431FDT AR* TL431BIDBZR CH*
TL431MFDT AU* TL431BQDBZR CJ*
TL431SDT RM* TL431BFDT AT*
TL431MSDT LR* TL431BMFDT AW*
TL431ACDBZR CD* TL431BSDT MA*
TL431AIDBZR CE* TL431BMSDT MB*
TL431AQDBZR CF* - -
TL431AFDT AS* - -
TL431AMFDT AV* - -
Fig 1. Functional diagram
V
ref
ANODE
CATHODE
REF
006aab569
