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LP2992 Micropower 250-mA Low-Noise Ultra-Low-Dropout Regulator in SOT-23 and WSON Packages Designed for Use With Very Low-ESR Output Capacitors
SNVS171K
November 2001 – December 2023
LP2992
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LP2992 Micropower 250-mA Low-Noise Ultra-Low-Dropout Regulator in SOT-23 and WSON Packages Designed for Use With Very Low-ESR Output Capacitors
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Electrical Characteristics
5.5
Thermal Information
5.6
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
Output Enable
6.3.2
Dropout Voltage
6.3.3
Current Limit
6.3.4
Undervoltage Lockout (UVLO)
6.3.5
Output Pulldown
6.3.6
Thermal Shutdown
6.4
Device Functional Modes
6.4.1
Device Functional Mode Comparison
6.4.2
Normal Operation
6.4.3
Dropout Operation
6.4.4
Disabled
7
Application and Implementation
7.1
Application Information
7.1.1
Estimating Junction Temperature
7.1.2
Input and Output Capacitor Requirements
7.1.3
Noise Bypass Capacitor (CBYPASS)
7.1.4
Power Dissipation (PD)
7.1.5
Recommended Capacitor Types
7.1.6
Reverse Current
7.2
Typical Application
7.2.1
Design Requirements
7.2.2
Detailed Design Procedure
7.2.2.1
ON/OFF Operation
7.2.3
Application Curves
8
Power Supply Recommendations
9
Layout
9.1
Layout Guidelines
9.2
Layout Examples
10
Device and Documentation Support
10.1
Device Nomenclature
10.2
Documentation Support
10.2.1
Related Documentation
10.3
Receiving Notification of Documentation Updates
10.4
Support Resources
10.5
Trademarks
10.6
Electrostatic Discharge Caution
10.7
Glossary
11
Revision History
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
NGD|6
MPDS393
DBV|5
MPDS018T
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvs171k_oa
snvs171k_pm
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Data Sheet
LP2992 Micropower 250-mA Low-Noise Ultra-Low-Dropout Regulator in SOT-23 and WSON Packages Designed for Use With Very Low-ESR Output Capacitors
1
Features
V
IN
range (new chip): 2.5 V to 16 V
V
OUT
range (new chip):
1.2 V to 5.0 V (fixed, 100-mV steps)
V
OUT
accuracy:
±1% for A-grade legacy chip
±1.5% for standard-grade legacy chip
±0.5% for new chip only
±1% output accuracy over load, and temperature for new chip
Output current: Up to 250 mA
Low I
Q
(new chip): 69 μA at I
LOAD
= 0 mA
Low I
Q
(new chip): 875 μA at I
LOAD
= 250 mA
Shutdown current:
0.01 μA (typ) for legacy chip
1.12 μA (typ) for new chip
Low noise: 30 μV
RMS
with 10-nF bypass capacitor
Output current limiting and thermal protection
Stable with 2.2-µF ceramic capacitors
High PSRR: 70 dB at 1 kHz, 40 dB at 1 MHz
Operating junction temperature: –40°C to 125°C
Package: 5-pin SOT-23 (DBV)
2
Applications
Washer and dryer
Land mobile radio
Active antenna system mMIMO
Cordless power tool
Motor drives and control boards