8186 Datasheet, PDF (1/8 Pages) Allegro MicroSystems – LOW-DROPOUT, 3.3 V REGULATOR . HIGH EFFICIENCY

8186
LOW-DROPOUT,
3.3 V REGULATOR
8186
LOW-DROPOUT, 3.3 V REGULATOR
PRELIMINARY INFORMATION
— HIGH EFFICIENCY
(subject to change without notice)
Designed specifically to meet the requirement for extended opera-
January 12, 1995
CT ₆
5
4
DU ^Y SUB
O NL _VR
PR _E ^O _SUB
D _{C 1}
2
3
TINUEEREN _{Dwg. PS-021-1}
ON ^EF _{ABSOLUTE MAXIMUM RATINGS}
C ^R _{Input Voltage, VI . . . . . . . . . . . . . . 10 V}
IS ^{R Output Current, IO . . . . . . . . . 150 mA*}
Enable Input Voltage, V_E . . . . . . . . . . V_I
D ^O _{Operating Temperature Range,}
F _{TA . . . . . . . . . . . . . -20°C to +85°C}
Junction Temperature, T_J . . . +150°C^†
— Storage Temperature Range,
tion of battery-powered equipment such as cordless and cellular
telephones, the A8186SLU 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 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. An ENABLE input
gives the designer complete control over power up, standby, or power
down.
This device is supplied in a 6-lead small-outline plastic package
(similar to the SOT-89/TO-243AA) for surface-mount applications. The
A8186SLU is rated for operation over a temperature range of -20°C to
+85°C.
FEATURES AND BENEFITS
s High Efficiency Provides Extended Battery Life
s 85 mV Typical Dropout Voltage at I_O = 60 mA
s 45 µA Typical Quiescent Current at V_I = 6 V
Less Than 1 µA “Sleep” Current
s Up to 150 mA Output Current
s CMOS-Compatible ON/OFF Control
For Power-Up, Standby, or Shutdown
s Internal Thermal Protection
s Surface-Mount Package
T_S . . . . . . . . . . . . -40°C to +150°C
APPLICATIONS
* 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.
† Fault conditions that produce excessive junction
temperature will activate device thermal
shutdown circuitry. These conditions can be
tolerated but should be avoided.
s Cordless and Cellular Telephones
s Personal Data Assistants
s Personal Communicators
s Palmtop Computers
Always order by complete part number: A8186SLU .