LM2662MX

Voltage Regulators - DC DC Switching Regulators Overview

The LM2662MX is a switched capacitor voltage converter manufactured by Texas Instruments, housed in an 8-pin VSSOP package. It operates with an input voltage range of 1.5 V to 5.5 V and provides a negative output voltage ranging from -1.5 V to -5.5 V at a maximum output current of 200 mA. The device supports selectable oscillator frequencies of 20 kHz or 150 kHz via the FC pin and includes a shutdown feature that reduces quiescent current to 10 µA. It functions as both an inverter and a voltage doubler, suitable for battery-powered applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Provides inverted or doubled voltage conversion using external capacitors without requiring inductors
• Features a frequency control pin allowing selection between 20 kHz and 150 kHz oscillation rates
• Includes a dedicated shutdown pin to disable the device and minimize static current consumption

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered portable electronics requiring negative rail generation
• RS-232 interface circuits needing dual polarity power supplies
• Communication equipment requiring low-noise voltage inversion
• Portable computers and peripheral devices utilizing charge pump topology

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'MX' corresponds to the VSSOP-8 tape-and-reel packaging configuration. Confirm RoHS compliance status and ensure the component matches the intended thermal management requirements for surface-mount assembly processes. Cross-reference the manufacturer's latest datasheet for any potential product discontinuance notifications or alternative package recommendations.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when an inductor-less solution is required to generate negative voltages from a single positive supply rail. Consider the 200 mA output capability and the ability to adjust switching frequency for EMI optimization. Evaluate the trade-off between efficiency and component count compared to inductive DC-DC converters, particularly for space-constrained designs where magnetic components are undesirable.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2662 belongs to the LM266x family of switched capacitor voltage converters from Texas Instruments. This series is designed for applications requiring simple voltage inversion or doubling with minimal external components. Unlike inductive regulators, these devices utilize flying capacitors to transfer energy, offering a compact footprint and reduced electromagnetic interference profile suitable for sensitive analog and digital circuits.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2662M/NOPB: Identical functional specifications with SOIC-8 packaging instead of VSSOP-8.

Voltage Regulators - DC DC Switching Regulators FAQ

How is the switching frequency adjusted on the LM2662?

The switching frequency can be selected between 20 kHz and 150 kHz by connecting a resistor to the Frequency Control (FC) pin.

What is the purpose of the SD pin?

The Shutdown (SD) pin allows the user to disable the device, reducing the quiescent current to approximately 10 µA for power-sensitive applications.