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LP2980-N Micropower, 50mA, Ultra-Low Dropout Regulator in SOT-23 Package
SNOS733R
April 2000 – February 2025
LP2980-N
PRODUCTION DATA
CONTENTS
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LP2980-N Micropower, 50mA, Ultra-Low Dropout Regulator in SOT-23 Package
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
Thermal Information
5.5
Electrical Characteristics
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
Normal Operation
6.4.2
Dropout Operation
6.4.3
Disabled
7
Application and Implementation
7.1
Application Information
7.1.1
Recommended Capacitor Types
7.1.1.1
Recommended Output Capacitors (Legacy Chip)
7.1.1.1.1
Tantalum Capacitors (Legacy Chip)
7.1.1.1.2
Aluminum Electrolytic Capacitors (Legacy Chip)
7.1.1.1.3
Multilayer Ceramic Capacitors (Legacy Chip)
7.1.1.2
Recommended Output Capacitors (New Chip)
7.1.2
Input Capacitor Requirements
7.1.3
Estimating Junction Temperature
7.1.4
Power Dissipation (PD)
7.1.5
Reverse Current
7.2
Typical Application
7.2.1
Design Requirements
7.2.2
Detailed Design Procedure
7.2.2.1
ON/OFF Input Operation
7.2.3
Application Curves
7.3
Power Supply Recommendations
7.4
Layout
7.4.1
Layout Guidelines
7.4.2
Layout Example
8
Device and Documentation Support
8.1
Device Support
8.1.1
Third-Party Products Disclaimer
8.1.2
Device Nomenclature
8.2
Receiving Notification of Documentation Updates
8.3
Support Resources
8.4
Trademarks
8.5
Electrostatic Discharge Caution
8.6
Glossary
9
Revision History
10
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DBV|5
MPDS018T
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snos733r_oa
snos733r_pm
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Data Sheet
LP2980-N Micropower, 50mA, Ultra-Low Dropout Regulator in SOT-23 Package
1
Features
V
IN
range (new chip): 2.5V to 16V
V
OUT
range (new chip):
1.2V to 5.0V (fixed, 100mV steps)
V
OUT
accuracy:
±0.5% for A-grade legacy chip
±1% for standard-grade legacy chip
±0.5% for new chip (A grade and standard grade)
Output accuracy over load, and temperature: ±1% (new chip)
Output current: Up to 50mA
Low I
Q
(new chip): 69μA at I
LOAD
= 0mA
Low I
Q
(new chip): 380μA at I
LOAD
= 50mA
Shutdown current over temperature:
0.01μA (typ) for legacy chip
1.12μA (typ) for new chip
Output current limiting and thermal protection
Stable with 2.2µF ceramic capacitors (new chip)
High PSRR (new chip):
75dB at 1kHz, 45dB at 1MHz
Operating junction temperature: –40°C to +125°C
Package: 5-pin SOT-23 (DBV)