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

5.5 Electrical Characteristics

Typical limits apply for TA = 25°C, and minimum and maximum limits apply over the full temperature range. Unless otherwise specified, VIN = 5 V and values for C1 to C4 are as shown in the Typical Application.
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
IqSupply currentOpen circuit, no load370600µA
ISDShutdown supply current712µA
ƒSWSwitching frequencyVIN = 3.6 V1.722.3MHz
RNEGOutput resistance to CPOUTVIN = 5.5 V2Ω
VDOLDO dropout voltageILOAD = 100 mA, VOUT = −5 V30mV
PSRRPower supply rejection ratioILOAD = 80 mA, VCPOUT = −5 V35dB
VNOutput noise voltageILOAD = 80 mA, 10 Hz to 100 kHz20µVRMS
VFBFeedback pin reference voltage1.2021.221.238V
VOUTAdjustable output voltage5.5 V ≥ VIN ≥ 2.7 V–5–1.5V
Load regulation0 to 250 mA, VOUT = −1.8 V4.6µV/mA
Line regulation5.5 V ≥ VIN ≥ 2.7 V, ILOAD = 50 mA1.5mV/V
VIHEnable pin input voltage high5.5 V ≥ VIN ≥ 2.7 V1.2V
VILEnable pin input voltage low5.5 V ≥ VIN ≥ 2.7 V0.4V
UVLOUndervoltage lockoutVIN falling2.6V
VIN rising2.4