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A8187SLT

Allegro MicroSystems
Part Number A8187SLT
Manufacturer Allegro MicroSystems
Description LOW-DROPOUT/ 3.3 V REGULATOR . HIGH EFFICIENCY
Published Mar 23, 2005
Detailed Description 8187 LOW-DROPOUT, 3.3 V REGULATOR — HIGH EFFICIENCY Designed specifically to meet the requirement for extended operatio...
Datasheet PDF File A8187SLT PDF File

A8187SLT
A8187SLT


Overview
8187 LOW-DROPOUT, 3.
3 V REGULATOR — HIGH EFFICIENCY Designed specifically to meet the requirement for extended operation of battery-powered equipment such as cordless and cellular telephones, the A8187SLT voltage regulator offers the reduced dropout voltage and quiescent current essential for maximum battery life.
Applicable also to palmtop computers and personal data assistants, the device delivers a regulated, continuous 3.
3 V output at up to 75 mA under normal operating conditions, or to 150 mA (transient) under worst-case conditions.
A PMOS pass element provides a typical dropout voltage of only 85 mV at 60 mA of load current.
The low dropout voltage permits deeper battery discharge before output regulation is lost.
Furthermore, quiescent current does not increase as the dropout voltage is approached, an ideal feature in standby/resume power systems where data integrity is crucial.
Regulator accuracy and excellent temperature characteristics are provided by a bandgap reference.
This device is supplied in a small-outline plastic transistor package (SOT-89/TO-243AA) for surface-mount applications.
The A8187SLT is rated for operation over a temperature range of -20°C to +85°C.
A similar device with an ENABLE input for control over sequential power up, standby, or power down is the A8186SLU.
Data Sheet 27468.
16A ABSOLUTE MAXIMUM RATINGS Input Voltage, VI .
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10 V Output Current, IO .
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150 mA* Operating Temperature Range, TA .
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-20°C to +85°C Junction Temperature, TJ .
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+150°C† Storage Temperature Range, TS .
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-40°C to +150°C * Output current rating is limited by input voltage, duty cycle, and ambient temperature.
Under any set of conditions, do not exceed a junction temperature of +150°C.
See next page.
T C U Y D L O N R P EO D C E N U E N R I E T F N E O R C S OR I D F — VR 3.
3 V 1 2 3 GND Dwg.
PS-022-1 OUT IN FEATURES AND BENEFITS I I I I I I High Efficiency Provides Ext...


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