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MSP84

New 2.5V, 500mA Micro-Power Regulator Strengthens Texas Instruments Low Dropout Family

DALLAS (June 30, 1997) -- Expanding its line of low dropout (LDO) regulators, Texas Instruments (TI) introduces a new 2.5V, 500mA micro-power regulator. Featuring TI’s P-Channel MOSFET (PMOS) design, this LDO regulator is ideal in applications such as notebook and desktop computers, personal digital assistants (PDAs) and digital cameras.

This device, designated the TPS71025, features a dropout voltage as low as 50mV at 100mA of output current while maintaining a maximum quiescent current of 292uA, regardless of load, even in dropout. This exceptional performance is achieved by using a PMOS transistor as the pass element instead of the traditional PNP transistor. Implementation of these LDOs directly adds operating life to battery-powered equipment with fixed 2.5V supplies. An enable function allows for powering down the regulator and reduces sleep-state current to 1uA.

Features/Benefits

Low dropout voltage, 50mV	Extends usable battery voltage range.
Low quiescent current – 292uA (typ.), independent of load	Prolongs battery life.
Low sleep state current, 1uA	Lengthens battery life.
2% output regulation	Improves system accuracy.
TSSOP packaging	Reduces component height for space-critical applications.

End Equipment Applications

Applications for the TPS71025 include:

• Notebook and desktop computers
  
• PDAs
  
• Digital cameras
  
• Telecom (phones and PBXs)
  
• Bar code scanners
  

Pricing, Packaging and Availability

The TPS71025 is now available from Texas Instruments and its authorized distributors. The TPS71025 is available in a thin shrink small-outline package (TSSOP) priced at $1.11; or in a small-outline integrated circuit (SOIC) priced at $1.03, both in quantities of 1,000.

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