ATL431LI Regulator Datasheet

ATL431LI Datasheet, PDF, Equivalent


Part Number

ATL431LI

Description

High Bandwidth Low-Iq Programmable Shunt Regulator

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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ATL431LI
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ATL431LI
ATL432LI
SLVSDU6D – JULY 2017 – REVISED NOVEMBER 2019
ATL431LI / ATL432LI High Bandwidth Low-Iq Programmable Shunt Regulator
1 Features
1 Reference voltage tolerance at 25°C
– 0.5% (B Grade)
– 1% (A Grade)
• Minimum typical output voltage: 2.5 V
• Adjustable output voltage: Vref to 36 V
• Operation from 40°C to +125°C (Q temp)
• Maximum temperature drift
– 17 mV (I Temp)
– 27 mV (Q Temp)
• 0.3-Ω Typical output impedance
• Sink-current capability
– Imin = 0.08 mA (max)
– IKA = 15 mA (max)
• Reference input current IREF: 0.4 μA (max)
• Deviation of reference input current over
temperature, II(dev): 0.3 μA (max)
• Packages: 1-mm x 1-mm X2SON or SOT23-3
2 Applications
• Adjustable voltage and current referencing
• Secondary side regulation in Flyback SMPS
• Zener diode replacement
• Voltage monitoring
• Precision constant current sink/source
• Comparator with integrated reference
3 Description
The ATL43xLI device is a three-terminal adjustable
shunt regulator, with specified thermal stability over
applicable automotive, commercial, and military
temperature ranges. The output voltage can be set to
any value between Vref (approximately 2.5 V) and 36
V, with two external resistors. These devices have a
typical output impedance of 0.3 Ω. Active output
circuitry provides a very sharp turn-on characteristic,
making these devices excellent replacements for
Zener diodes in many applications, such as onboard
regulation, adjustable power supplies, and switching
power supplies. This device is a pin-to-pin alternative
to the TL431LI and TL432LI, with lower minimum
operating current to help reduce system power
consumption. The ATL432LI device has exactly the
same functionality and electrical specifications as the
ATL431LI device, but has a different pinout for the
DBZ package. The ATL431LI is also offered in a tiny
X2SON (1.00 mm x 1.00 mm) package which makes
it ideal for space constraint applications.
The ATL431LI device is offered in two grades, with
initial tolerances (at 25°C) of 0.5%, and 1%, for the B
and A grade, respectively. In addition, low output drift
versus temperature ensures good stability over the
entire temperature range.
The ATL43xLIxQ devices are characterized for
operation from –40°C to +125°C.
Device Information(1)
PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
ATL43xLI
SOT-23 (3)
2.90 mm x 1.30 mm
ATL431LI
X2SON (4)
1.00 mm x 1.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
Input
VKA
IKA
Vref
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

ATL431LI
ATL431LI
ATL432LI
SLVSDU6D – JULY 2017 – REVISED NOVEMBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Thermal Information .................................................. 4
7.4 Recommended Operating Conditions....................... 4
7.5 Electrical Characteristics........................................... 5
8 Typical Characteristics.......................................... 6
9 Parameter Measurement Information .................. 9
9.1 Temperature Coefficient............................................ 9
9.2 Dynamic Impedance ............................................... 10
10 Detailed Description ........................................... 11
10.1 Overview ............................................................... 11
10.2 Functional Block Diagram ..................................... 11
10.3 Feature Description............................................... 12
10.4 Device Functional Modes...................................... 12
11 Applications and Implementation...................... 13
11.1 Application Information.......................................... 13
11.2 Typical Applications .............................................. 13
11.3 System Examples ................................................. 21
12 Power Supply Recommendations ..................... 25
13 Layout................................................................... 25
13.1 Layout Guidelines ................................................. 25
13.2 SOT23-3 Layout Example..................................... 25
13.3 X2SON (DQN) Layout Example............................ 25
13.4 Thermal Considerations ........................................ 26
14 Device and Documentation Support ................. 27
14.1 Documentation Support ........................................ 27
14.2 Related Links ........................................................ 27
14.3 Receiving Notification of Documentation Updates 27
14.4 Community Resources.......................................... 27
14.5 Trademarks ........................................................... 27
14.6 Electrostatic Discharge Caution ............................ 27
14.7 Glossary ................................................................ 28
15 Mechanical, Packaging, and Orderable
Information ........................................................... 28
4 Revision History
Changes from Revision C (August 2019) to Revision D
Page
• Changed typical graph to match Electrical Characteristics ................................................................................................... 6
• Added X2SON (DQN) Layout Example ............................................................................................................................... 25
• Added Thermal Considerations ............................................................................................................................................ 26
Changes from Revision B (November 2018) to Revision C
Page
• Changed Imin description to match Electrical Characteristics ................................................................................................. 1
• Added X2SON package option .............................................................................................................................................. 1
• Added X2SON pinout and specifications................................................................................................................................ 3
Changes from Revision A (October 2018) to Revision B
Page
• Changed ATL43xLI from Product Preview to Production Data. ............................................................................................. 1
Changes from Original (July 2018) to Revision A
Page
• Initial release of full version ................................................................................................................................................... 1
• Changed Stability Boundary Conditions for All ATL431, ATL432 Devices Above 1 mA graph ............................................. 7
• Added Stability Boundary Conditions for All ATL431, ATL432 Devices Below 1 mA graph ................................................. 7
• Added Test Circuit for Stability Boundary Conditions image ................................................................................................. 7
2 Submit Documentation Feedback
Copyright © 2017–2019, Texas Instruments Incorporated
Product Folder Links: ATL431LI ATL432LI


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity ATL431LI ATL432LI SLVSDU6D – JULY 2017 – REVISED NOVEMBER 2019 ATL 431LI / ATL432LI High Bandwidth Low-Iq Programmable Shunt Regulator 1 Feature s •1 Reference voltage tolerance at 2 5°C – 0.5% (B Grade) – 1% (A Grade ) • Minimum typical output voltage: 2 .5 V • Adjustable output voltage: Vre f to 36 V • Operation from −40°C t o +125°C (Q temp) • Maximum temperat ure drift – 17 mV (I Temp) – 27 mV (Q Temp) • 0.3-Ω Typical output impe dance • Sink-current capability – I min = 0.08 mA (max) – IKA = 15 mA (ma x) • Reference input current IREF: 0. 4 μA (max) • Deviation of reference input current over temperature, II(dev) : 0.3 μA (max) • Packages: 1-mm x 1- mm X2SON or SOT23-3 2 Applications • Adjustable voltage and current referenc ing • Secondary side regulation in Fl yback SMPS • Zener diode replacement • Voltage monitoring • Precision constant current sink/source • Comparator with integrated reference 3 Descripti.
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