SNVSAF7B August   2016  – February 2017 LM27762

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Undervoltage Lockout
      2. 7.3.2 Input Current Limit
      3. 7.3.3 PFM Operation
      4. 7.3.4 Output Discharge
      5. 7.3.5 Power Good Output (PGOOD)
      6. 7.3.6 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Enable Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Positive Low-Dropout Linear Regulator and OUT+ Voltage Setting
        3. 8.2.2.3 Charge-Pump Voltage Inverter
        4. 8.2.2.4 Negative Low-Dropout Linear Regulator and OUT- Voltage Setting
        5. 8.2.2.5 External Capacitor Selection
          1. 8.2.2.5.1 Charge-Pump Output Capacitor
          2. 8.2.2.5.2 Input Capacitor
          3. 8.2.2.5.3 Flying Capacitor
          4. 8.2.2.5.4 LDO Output Capacitor
        6. 8.2.2.6 Power Dissipation
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Custom Design With WEBENCH® Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

5 Pin Configuration and Functions

DSS Package
12-Pin WSON With Thermal Pad
Top View
LM27762 packdraw.gif

Pin Functions

PIN TYPE DESCRIPTION
NAME NUMBER
C1+ 10 Power Positive terminal for C1
C1– 9 Power Negative terminal for C1
CP 5 Power Negative unregulated output voltage
EN+ 12 Input Enable input for the positive LDO, Active high
EN– 8 Input Enable input for the charge pump and negative LDO, Active high
FB+ 2 Power Feedback input. Connect FB+ to an external resistor divider between OUT+ and GND. DO NOT leave unconnected.
FB– 7 Power Feedback input. Connect FB– to an external resistor divider between OUT– and GND. DO NOT leave unconnected.
GND 4 Ground Ground
OUT+ 11 Power Regulated positive output voltage
OUT– 6 Power Regulated negative output voltage
PGOOD 1 Output Power Good flag; open drain; Logic 0 = power good, Logic 1 = power not good. Connect to ground if not used.
VIN 3 Power Positive power supply input
Thermal Pad — Ground Ground. DO NOT leave unconnected.