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PDF ( 数据手册 , 数据表 ) A8187SLT

零件编号 A8187SLT
描述 LOW-DROPOUT/ 3.3 V REGULATOR . HIGH EFFICIENCY
制造商 Allegro MicroSystems
LOGO Allegro MicroSystems LOGO 


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A8187SLT 数据手册, 描述, 功能
8187
LOW-DROPOUT, 3.3 V REGULATOR
— HIGH EFFICIENCY
Designed specifically to meet the requirement for extended opera-
tion 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.
T3.3 V
CVR
PRODUONLY1 2
3
INUED ENCEDwg.PS-022-1
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 ap-
proached, 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.
ONT EFERABSOLUTE MAXIMUM RATINGS
C RInput Voltage, VI . . . . . . . . . . . . . . 10 V
Output Current, IO . . . . . . . . . 150 mA*
IS ROperating Temperature Range,
D OTA . . . . . . . . . . . . . -20°C to +85°C
FJunction Temperature, TJ . . . +150°C
Storage Temperature Range,
TS . . . . . . . . . . . . -40°C to +150°C
FEATURES AND BENEFITS
I High Efficiency Provides Extended Battery Life
I 85 mV Typical Dropout Voltage at IO = 60 mA
I 45 µA Typical Quiescent Current at VI = 6 V
I Up to 150 mA Output Current
I Internal Thermal Protection
I Surface-Mount Package
APPLICATIONS
I Cordless and Cellular Telephones
* 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.
I Personal Data Assistants
I Personal Communicators
I Palmtop Computers
† Fault conditions that produce excessive junction
temperature will activate device thermal
shutdown circuitry. These conditions can be
tolerated but should be avoided.
Always order by complete part number: A8187SLT .







A8187SLT pdf, 数据表
8187
LOW-DROPOUT,
3.3 V REGULATOR
Allegro MicroSystems, Inc. reserves the right to make, from time to time, such
departures from the detail specifications as may be required to permit improvements in
the design of its products.
The information included herein is believed to be accurate and reliable. However,
Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements
of patents or other rights of third parties which may result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000














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