SNVSA85D
October 2015 – October 2025
LM27761
PRODUCTION DATA
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
Undervoltage Lockout
6.3.2
Input Current Limit
6.3.3
PFM Operation
6.3.4
Output Discharge
6.3.5
Thermal Shutdown
6.4
Device Functional Modes
6.4.1
Shutdown Mode
6.4.2
Enable Mode
7
Application and Implementation
7.1
Application Information
7.2
Typical Application - Regulated Voltage Inverter
7.2.1
Design Requirements
7.2.2
Detailed Design Procedure
7.2.2.1
Charge-Pump Voltage Inverter
7.2.2.2
Negative Low-Dropout Linear Regulator
7.2.2.3
Power Dissipation
7.2.2.4
Output Voltage Setting
7.2.2.5
External Capacitor Selection
7.2.2.5.1
Charge-Pump Output Capacitor
7.2.2.5.2
Input Capacitor
7.2.2.5.3
Flying Capacitor
7.2.2.5.4
LDO Output Capacitor
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
Receiving Notification of Documentation Updates
8.2
Support Resources
8.3
Trademarks
8.4
Electrostatic Discharge Caution
8.5
Glossary
9
Revision History
10
Mechanical, Packaging, and Orderable Information
1
Features
Inverts and regulates the input supply voltage
Low output ripple
Shutdown lowers quiescent current to 7µA (typical)
Up to 250mA output current
2.5Ω inverter output impedance, V
IN
= 5V
±4% regulation at peak load
370µA quiescent current
2MHz (typical) low-noise fixed-frequency operation
35dB (typical) LDO PSRR at 2MHz
with 80mA load current
30mV LDO dropout voltage at 100mA,
V
OUT
= –5V
Current limit and thermal protection