LM27762DSSR

Voltage Regulators - DC DC Switching Regulators Overview

The LM27762DSSR is a low-noise dual-output charge pump with an integrated LDO, manufactured by Texas Instruments. It provides adjustable positive and negative output voltages ranging from ±1.5 V to ±5 V. The device supports an input voltage range of 2.7 V to 5.5 V and delivers up to ±250 mA output current. Key electrical parameters include a typical quiescent current of 390 μA and a shutdown current of 0.5 μA. The inverting charge pump operates at a fixed frequency of approximately 2 MHz. The negative LDO features a dropout voltage of 30 mV at 100 mA, while the positive LDO has a dropout of 45 mV at 100 mA. Power supply rejection ratio (PSRR) is typically 50 dB for the negative output.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a low-noise inverting charge pump followed by a negative LDO and a separate positive LDO to generate stable dual rails.
• Features independent enable inputs for positive and negative outputs, allowing flexible power sequencing control.
• Includes optional power-good status indication and comprehensive protection against overcurrent and thermal overload.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering high-fidelity audio headphone amplifiers requiring low noise supplies.
• Biasing data converters and operational amplifiers in precision measurement systems.
• Providing dual-rail power for wireless communication system components.

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix DSSR corresponds to the WSON-12 package with exposed pad when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ESD handling protocols are followed due to the small form factor. Cross-reference pinouts with the latest datasheet revision to avoid layout errors during PCB design implementation.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing circuits that require simultaneous positive and negative rails from a single low-voltage source. It is suitable for battery-powered applications where low quiescent current is critical. Consider the 12-WSON package size constraints and thermal dissipation requirements for the target application environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM27762 family of power management ICs designed for portable electronics. It combines switched-capacitor technology with linear regulation to minimize noise and footprint. The device addresses the need for clean power in sensitive analog circuits without requiring bulky external inductors or complex multi-stage designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM27762DSST

Voltage Regulators - DC DC Switching Regulators FAQ

How does the LM27762DSSR handle power sequencing for its two outputs?

The device features dedicated enable pins for the positive and negative outputs. These can be controlled independently to meet specific system timing requirements or tied together to start simultaneously.

What is the typical operating frequency of the internal charge pump?

The inverting charge pump operates at a fixed frequency of approximately 2 MHz, which helps reduce output resistance and voltage ripple.