SNVSA85D October   2015  – October 2025 LM27761

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Undervoltage Lockout
      2. 6.3.2 Input Current Limit
      3. 6.3.3 PFM Operation
      4. 6.3.4 Output Discharge
      5. 6.3.5 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown Mode
      2. 6.4.2 Enable Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application - Regulated Voltage Inverter
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Charge-Pump Voltage Inverter
        2. 7.2.2.2 Negative Low-Dropout Linear Regulator
        3. 7.2.2.3 Power Dissipation
        4. 7.2.2.4 Output Voltage Setting
        5. 7.2.2.5 External Capacitor Selection
          1. 7.2.2.5.1 Charge-Pump Output Capacitor
          2. 7.2.2.5.2 Input Capacitor
          3. 7.2.2.5.3 Flying Capacitor
          4. 7.2.2.5.4 LDO Output Capacitor
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

5.6 Typical Characteristics

Unless otherwise specified, TA = 25°C, VIN = 5 V, and values for C1 to C4 are as shown in the Typical Application.

LM27761 Output Voltage Ripple vs Output Current
Figure 5-1 Output Voltage Ripple vs Output Current
LM27761 Quiescent Current
EN = 1ILOAD = 0 mA
Figure 5-3 Quiescent Current
LM27761 Load Regulation
VIN = 3 VVOUT = –1.8 V
R1 = 237 kΩR2 = 500 kΩ
Figure 5-5 Load Regulation
LM27761 Load Regulation
VIN = 5 VVOUT = –3.3 V
R1 = 856 kΩR2 = 500 kΩ
Figure 5-7 Load Regulation
LM27761 Output Voltage Ripple
VIN = 5.5 VVOUT = –5 VIOUT = 250 mA
Figure 5-9 Output Voltage Ripple
LM27761 Enable Low
Figure 5-11 Enable Low
LM27761 Line Regulation
VOUT = –1.8 VIOUT = 50 mA
R1 = 237 kΩR2 = 500 kΩ
Figure 5-13 Line Regulation
LM27761 Line Regulation
VOUT = –1.8IOUT = 250 mAR1 = 237 kΩR2 = 500 kΩ
Figure 5-15 Line Regulation
LM27761 Output Voltage Ripple vs Input Voltage
VOUT = –1.8 VIOUT = 100 mA
Figure 5-2 Output Voltage Ripple vs Input Voltage
LM27761 Shutdown Current
EN = 0
Figure 5-4 Shutdown Current
LM27761 Load Regulation
VIN = 5.5 VVOUT = –5 V
R1 = 1.54 MΩR2 = 500 kΩ
Figure 5-6 Load Regulation
LM27761 Output Voltage Ripple
VIN = 3 VVOUT = –1.8 VIOUT = 250 mA
Figure 5-8 Output Voltage Ripple
LM27761 Enable High
Figure 5-10 Enable High
LM27761 LDO Dropout Voltage vs IOUT
Figure 5-12 LDO Dropout Voltage vs IOUT
LM27761 Line Regulation
VOUT = –1.8 VIOUT = 100 mA
R1 = 237 kΩR2 = 500 kΩ
Figure 5-14 Line Regulation