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Reference Design
LM2936Q
SNVS684D – NOVEMBER 2010 – REVISED MARCH 2016
LM2936Q Ultralow Quiescent Current LDO Voltage Regulator
1 Features
•1 Qualified for Automotive Applications • AEC Q100-Qualified With the Following Results
– Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
• Operating Input Voltage: 5.5 V to 40 V • Ultralow Quiescent Current (IQ ≤ 15 μA for
IOUT = 100 μA) • Fixed 3-V, 3.3-V or 5-V With 50-mA Output • ±2% Initial Output Tolerance • ±3% Output Tolerance Over Line, Load, and
Temperature • Dropout Voltage Typically 200 mV at IOUT = 50 mA • Reverse Battery Protection • –50-V Input Transient Protection • Internal Short Circuit Current Limit • Internal Thermal Shutdown Protection • 40-V Operating Voltage Limit • Shutdown Pin Available with LM2936QBM
Package
2 Applications
Automotive
3 Description
The LM2936Q ultralow quiescent-current regulator features low dropout voltage and low current in the standby mode. With less than 15-μA quiescent current at a 100-μA load, the LM2936Q is ideally suited for automotive and other battery-operated systems. The LM2936Q retains all of the features that are common to low-dropout regulators including a low dropout PNP pass device, short-circuit protection, reverse battery protection, and thermal shutdown. The LM2936Q has a 40-V maximum operating voltage limit, a −40°C to +125°C operating temperature range, and ±3% output voltage tolerance over the entire output current, input voltage, and temperature range. The LM2936Q is available in
8-pin SOIC and VSSOP packages, a 4-pin SOT–223 package, as well as a 3-pin TO-252 surface mount package.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
SOIC (8)
4.90 mm × 3.91 mm
LM2936Q
TO-252 (3) VSSOP (8)
6.10 mm × 6.58 mm 3.00 mm × 3.00 mm
SOT-223 (4)
6.50 mm × 3.50 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Schematic
VIN IN OUT VOUT
CIN 100 nF *
GND
COUT 10 µF **
Copyright © 2016, Texas Instruments Incorporated
* Required if regulator is located more than 2 inches from power supply filter capacitor. ** Required for stability. See Electrical Characteristics for 3-V LM2936Q for required values. Must be rated over intended operating temperature range. Effective equivalent series resistance (ESR) is critical, see Typical Characteristics. Locate capacitor as close to the regulator output and ground pins as possible. Capacitance may be increased without bound.
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.
LM2936Q
SNVS684D – NOVEMBER 2010 – REVISED MARCH 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Pin Configuration and Functions ......................... 3 6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4 6.2 ESD Ratings.............................................................. 4 6.3 Recommended Operating Conditions....................... 4 6.4 Thermal Information .................................................. 4 6.5 Electrical Characteristics for 3-V LM2936Q .............. 5 6.6 Electrical Characteristics for 3.3-V LM2936Q ........... 6 6.7 Electrical Characteristics for 5-V LM2936Q .............. 7 6.8 Typical Characteristics .............................................. 8 7 Detailed Description ............................................ 12 7.1 Overview ................................................................. 12 7.2 Functional Block Diagram ....................................... 12
7.3 Feature Description................................................. 12 7.4 Device Functional Modes........................................ 13 8 Application and Implementation ........................ 14 8.1 Application Information............................................ 14 8.2 Typical Application ................................................. 14 9 Power Supply Recommendations...................... 16 10 Layout................................................................... 17 10.1 Layout Guidelines ................................................. 17 10.2 Layout Examples................................................... 17 11 Device and Documentation Support ................. 18 11.1 Documentation Support ........................................ 18 11.2 Community Resources..............