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LM2776DBVR

Inverting charge pump, -5V 50mA, 2.7-5.5V, SOT-23-6

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Manufacturer Part：

LM2776DBVR

Package：

SOT-23-6 (2.9 x 1.6 mm)

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Description

Product Overview

The LM2776DBVR from Texas Instruments is a regulated inverting switched capacitor charge pump that generates -5V from a 2.7-5.5V positive input in a SOT-23-6 package. With 50mA output current, 2MHz switching frequency, and only 4 external capacitors required, it provides a compact negative rail for op-amp and sensor supplies.

Key Specifications

Output Voltage -5.0V regulated
Input Voltage 2.7V to 5.5V
Output Current 50mA
Efficiency Up to 80%
Switching Frequency 2MHz fixed
Iq 1.1mA typical
Shutdown Iq 0.1uA
Output Ripple 15mV typical
External Components 4 capacitors only
Operating Temp -40 to +85 C
Package SOT-23-6

Features

  • -5V regulated output from positive supply
  • No inductor required (charge pump topology)
  • 50mA output current capability
  • 2MHz high frequency for small capacitors
  • 1.1mA Iq, 0.1uA shutdown current
  • Only 4 external capacitors needed

Applications

  • GaN/GaAs FET gate bias (-5V)
  • Negative op-amp supply rail
  • LCD negative bias voltage
  • Audio amplifier split-rail generation

The LM2776DBVR from Texas Instruments is a regulated inverting switched capacitor charge pump that generates -5V from a 2.7-5.5V positive input in a SOT-23-6 package. With 50mA output current, 2MHz switching frequency, and only 4 external capacitors required, it provides a compact negative rail for op-amp and sensor supplies.

The LM2776DBVR operates as described in the product overview. Key subsystems include the input stage, processing/gain stage, output stage, and protection circuitry as detailed in the datasheet.

Pin Name Type Description
1 VOUT Output -5V regulated output
2 CFLY+ I/O Flying capacitor positive
3 CFLY- I/O Flying capacitor negative
4 GND Power Ground (input return)
5 EN Input Enable (active high)
6 VIN Power Input supply (2.7-5.5V)
  • GaN/GaAs FET gate bias (-5V)
  • Negative op-amp supply rail
  • LCD negative bias voltage
  • Audio amplifier split-rail generation
Model Manufacturer Package Notes
LM27761DBVR TI SOT-23-6 Adjustable -1.5 to -5V output
TPS60400DBVR TI SOT-23-5 Unregulated -60mA charge pump
LM2664MM/NOPB TI VSSOP-8 Unregulated, 60mA
MAX889TESA+T ADI SOIC-8 -2x Vin, 200mA
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