HIGH EFFICIENCY. 8184 Datasheet

8184 Datasheet PDF, Equivalent


Part Number

8184

Description

LOW-DROPOUT/ 3 V REGULATOR . HIGH EFFICIENCY

Manufacture

Allegro MicroSystems

Total Page 8 Pages
PDF Download
Download 8184 Datasheet PDF


8184 Datasheet
8184
LOW-DROPOUT, 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 A8184SLT voltage regulator offers the reduced dropout
voltage and quiescent current essential for maximum battery life.
T3 V
VR
RODUCNLY1 2
3
UED P NCE ODwg.PS-022
Applicable also to palmtop computers and personal data assistants, the
device delivers a regulated, continuous 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
90 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 A8184SLT 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 A8183SLU.
ONTIN EFEREABSOLUTE 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 90 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
I Personal Data Assistants
* Output current rating is limited by input voltage,
duty cycle, and ambient temperature. Under
I Personal Communicators
any set of conditions, do not exceed a junction
temperature of +150°C. See next page.
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: A8184SLT .

8184 Datasheet
8184
LOW-DROPOUT,
3 V REGULATOR
FUNCTIONAL BLOCK DIAGRAM
IN 1
BIAS
GND 2
DRIVE
3 OUT
ERROR
AMP
BANDGAP
REF.
TAB
Dwg. FS-012-4
MAXIMUM ALLOWABLE OUTPUT CURRENT with device mounted on 2.24" x 2.24"
(56.9 mm x 56.9 mm) solder-coated copper-clad board in still air.
TA
25°C
Maximum Allowable Output Current in Milliamperes with VI = 8 V, TJ = 150°C, Period 10 s*
dc (Duty Cycle)
100%
90%
80%
70%
60%
50%
40%
30%
95 105 120 135 150 150 150 150
20%
150
50°C
75
85
95 110 125 150 150 150 150
70°C
60
65
75
85 100 120 150 150 150
85°C
50
55
60
70
80 100 125 150 150
* IO = (TJ - TA)/([VI - VO] RθJA • dc) = (150 - TA)/(5 • 258 • dc)
Output current rating can be increased (to 150 mA maximum) by heat sinking or reducing the input voltage. Conditions that produce excessive
junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated but should be avoided.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1994, 2000, Allegro MicroSystems, Inc.


Features Datasheet pdf 8184 LOW-DROPOUT, 3 V REGULATOR — HIG H EFFICIENCY Designed specifically to m eet the requirement for extended operat ion of battery-powered equipment such a s cordless and cellular telephones, the A8184SLT voltage regulator offers the reduced dropout voltage and quiescent c urrent essential for maximum battery li fe. Applicable also to palmtop computer s and personal data assistants, the dev ice delivers a regulated, continuous 3 V output at up to 75 mA under normal op erating conditions, or to 150 mA (trans ient) under worst-case conditions. A PM OS pass element provides a typical drop out voltage of only 90 mV at 60 mA of l oad current. The low dropout voltage pe rmits deeper battery discharge before o utput regulation is lost. Furthermore, quiescent current does not increase as the dropout voltage is approached, an i deal feature in standby/resume power sy stems where data integrity is crucial. Regulator accuracy and excellent temper ature characteristics are provided by a bandgap reference. This d.
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