A8183: Low-Dropout, 3 V Regulator, High Efficiency

Data Sheet
27468.4
8183
OUT
LOW-DROPOUT, 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 A8183SLU 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 V output at up to 75 mA under
normal operating conditions, or to 150 mA (transient) under worst-case
conditions.
3V
SUB
IN
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
R
I
D FO
—
6
5
4
SUB
VR
1
2
3
GND
SUB
ENABLE
SUB
Dwg. PS-021
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 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. 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
A8183SLU is rated for operation over a temperature range of -20°C to
+85°C.
FEATURES AND BENEFITS
ABSOLUTE MAXIMUM RATINGS
Input Voltage, VI . . . . . . . . . . . . . . 10 V
Output Current, IO . . . . . . . . . 150 mA*
Enable Input Voltage, VE . . . . . . . . . . VI
Operating Temperature Range,
TA . . . . . . . . . . . . . -20°C to +85°C
Junction Temperature, TJ . . . +150°C†
Storage Temperature Range,
TS . . . . . . . . . . . . -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.
† Fault conditions that produce excessive junction
temperature will activate device thermal
shutdown circuitry. These conditions can be
tolerated but should be avoided.
■ High Efficiency Provides Extended Battery Life
■ 90 mV Typical Dropout Voltage at IO = 60 mA
■ 45 µA Typical Quiescent Current at VI = 6 V
Less Than 1 µA “Sleep” Current
■ Up to 150 mA Output Current
■ CMOS-Compatible ON/OFF Control
For Power-Up, Standby, or Shutdown
■ Internal Thermal Protection
■ Surface-Mount Package
APPLICATIONS
■
■
■
■
Cordless and Cellular Telephones
Personal Data Assistants
Personal Communicators
Palmtop Computers
Always order by complete part number: A8183SLU
.
8183
LOW-DROPOUT,
3 V REGULATOR
FUNCTIONAL BLOCK DIAGRAM
IN
4
THERMAL
PROTECT.
ENABLE
3
1
ERROR
AMP
DRIVE
BIAS
ENABLE
OUT
6
BANDGAP
REF.
GND
2
SUB
5
SUB
SUB
Dwg. FS-012-3
Terminal numbering is in accordance with EIA/JEDEC convention.
Where EIAJ conventions apply, the tab is not numbered, resulting in
terminal 6 being designated terminal 5.
For proper operation, terminals 1 and 2 must be externally connected together.
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.
Maximum Allowable Output Current in Milliamperes with VI = 8 V, TJ = 150°C, Period ≤10 s*
dc (Duty Cycle)
TA
100%
90%
80%
70%
60%
50%
40%
30%
20%
25°C
95
105
120
135
150
150
150
150
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
W
Copyright © 1994 Allegro MicroSystems, Inc.
8183
LOW-DROPOUT,
3 V REGULATOR
ELECTRICAL CHARACTERISTICS at TA = +25°C (unless otherwise noted).
Limits
Characteristic
Symbol
Output Voltage
VO
Test Conditions
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Units
2.95
3.00
3.05
V
10 µA ≤ IO ≤ 100 mA*
-20°C ≤ TA ≤ +85°C
2.90
3.00
3.10
V
2.70
—
—
V
VI = 6 V, IO = 10 mA
—
—
±1.0
mV/°C
6 V ≤ VI ≤ 8 V, IO = 1 mA
—
4.0
10
mV
4 V ≤ VI ≤ 6 V, IO = 1 mA
—
9.5
18
mV
1 mA ≤ IO ≤ 100 mA*, VI = 8 V
—
19
30
mV
1 mA ≤ IO ≤ 100 mA*, VI = 6 V
—
14
25
mV
1 mA ≤ IO ≤ 100 mA*, VI = 4 V
—
8.0
20
mV
IO = 60 mA*
—
90
150
mV
IO = 125 mA*
—
190
300
mV
VI = 6 V, 1 mA ≤ IO ≤ 100 mA*, VE ≥ 2.0 V
—
45
60
µA
VI = 8 V, 1 mA ≤ IO ≤ 100 mA*, VE ≥ 2.0 V
—
50
65
µA
IQ(off)
4 V ≤ VI ≤ 8 V, VE ≤ 0.8 V
—
—
1.0
µA
VEH
4 V ≤ VI ≤ 8 V,
Output ON
2.0
—
—
V
VEL
-20°C ≤ TA ≤ +85°C
Output OFF
—
—
0.8
V
—
—
±0.1
µA
150
—
—
°C
—
258
—
°C/W
αVO
∆VO(∆VI)
∆VO(∆IO)
VImin - VO
IQ
ENABLE Input Current
IE
Thermal Shutdown Temp.
TJ
Thermal Resistance
Max.
TA = +25°C
(GND terminal current)
ENABLE Input Voltage
Typ.
4 V ≤ VI ≤ 8 V,
VI = 3 V, IO = 60 mA*, -20°C ≤ TA ≤ +85°C
Output Volt. Temp. Coeff.
Min.
RθJA
TA ≤ +85°C, VE = VI = 8 V
Mounted on 2.24" x 2.24" solder-coated
copper-clad board in still air
Typical values are at TA = +25°C and are given for circuit design information only.
* Pulse test (≤20 ms). See previous page for duty cycle limitations.
8183
LOW-DROPOUT,
3 V REGULATOR
TYPICAL CHARACTERISTICS
LOAD REGULATION
LINE REGULATION
3.06
3.06
TA = -20°C
3.04
3.02
VI = 8 V
OUTPUT VOLTAGE in VOLTS
OUTPUT VOLTAGE in VOLTS
3.04
VI = 6 V
3.00
2.98
V =4V
I
2.96
TA = -20°C
2.94
50 mA INTERVALS
3.02
I O = 0 mA
3.00
IO = 100 mA
2.98
2.96
2.94
2.92
2.92
0
25
50
75
125
100
2.0
150
3.0
4.0
5.0
7.0
6.0
Dwg. GP-053-3
3.06
3.06
3.04
3.04
OUTPUT VOLTAGE in VOLTS
OUTPUT VOLTAGE in VOLTS
Dwg. GP-052-3
3.02
VI = 8 V
3.00
2.98
V =4V
I
2.96
TA = 25°C
2.94
8.0
INPUT VOLTAGE in VOLTS
OUTPUT CURRENT in mA
TA = 25°C
50 mA INTERVALS
3.02
IO = 0 mA
3.00
2.98
IO = 100 mA
2.96
2.94
2 V INTERVALS
2.92
2.92
0
25
50
75
100
125
150
OUTPUT CURRENT in mA
2.0
3.0
4.0
5.0
Dwg. GP-052-4
CAUTION:
6.0
7.0
8.0
INPUT VOLTAGE in VOLTS
Dwg. GP-053-4
Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output currents.
See Maximum Allowable Output Current table.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8183
LOW-DROPOUT,
3 V REGULATOR
TYPICAL CHARACTERISTICS (cont’d)
LOAD REGULATION
LINE REGULATION
3.06
3.06
TA = 85°C
3.04
3.02
OUTPUT VOLTAGE in VOLTS
OUTPUT VOLTAGE in VOLTS
3.04
3.00
VI = 8 V
2.98
2.96
VI = 4 V
TA = 85°C
2.94
50 mA INTERVALS
3.02
3.00
IO = 0 mA
2.98
IO = 100 mA
2.96
2.94
2 V INTERVALS
2.92
2.92
0
25
50
75
125
100
2.0
150
3.0
4.0
5.0
6.0
7.0
8.0
INPUT VOLTAGE in VOLTS
OUTPUT CURRENT in mA
Dwg. GP-053-5
Dwg. GP-052-5
OUTPUT VOLTAGE
3.5
OUTPUT VOLTAGE in VOLTS
OUTPUT VOLTAGE in VOLTS
3.0
2.5
2.0
1.5
I O = 0 - 100 mA
1.0
TA = 25°C
VI = 6 V
3.01
IO = 0
3.00
2.99
2.98
0.5
0
0
1.0
2.0
3.0
4.0
INPUT VOLTAGE in VOLTS
0
+50
+100
AMBIENT TEMPERATURE in ° C
Dwg. GP-059
CAUTION:
-50
Dwg. GP-050-1
Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output currents.
See Maximum Allowable Output Current table.
8183
LOW-DROPOUT,
3 V REGULATOR
TYPICAL CHARACTERISTICS (cont’d)
QUIESCENT (GROUND TERMINAL) CURRENT
QUIESCENT (GROUND TERMINAL) CURRENT in µA
QUIESCENT (GROUND TERMINAL) CURRENT in µA
60
50
VI =6V
IO = 0
VE ≥ 2 V
45
40
35
-50
0
+50
+100
IO = 0
50
40
TA = 85°C
30
20
TA = 25°C
TA = -20°C
10
0
0
2.0
AMBIENT TEMPERATURE in ° C
4.0
6.0
8.0
INPUT VOLTAGE in VOLTS
Dwg. GP-051-1
Dwg. GP-058
DROPOUT VOLTAGE
0.25
DROPOUT VOLTAGE in VOLTS
0.20
TA = 85°C
TA = 25°C
TA = -20°C
0.15
0.10
0.05
0
0
25
50
75
100
125
150
OUTPUT CURRENT in mA
Dwg. GP-054-1
CAUTION:
Maximum allowable duty cycle will be significantly less than 100% at high temperatures, at high input voltages, or at high output currents.
See Maximum Allowable Output Current table.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
8183
LOW-DROPOUT,
3 V REGULATOR
TYPICAL CHARACTERISTICS (concluded)
LOAD TRANSIENT PERFORMANCE
ENABLE TRANSIENT PERFORMANCE
VI = 3.2 V to 6.2 V, CO as specified, TA = 25°C
VI = 3.2 V to 6.2 V, CO = 1 µF, TA = 25°C
3.25 V
VO
CO = 10 µF
3.0 V
3.0 V
2.75 V
VO
3.5 V
0
VO
C O = 1 µF
<100 µs
3.0 V
<150 µs
VI
2.5 V
<50 µs
<600 µs
VE
100 mA
0
IO
Dwg. WP-027-1
1 mA
Dwg. WP-028
8183
LOW-DROPOUT,
3 V REGULATOR
Dimensions in Inches
(Based on 1 mm = 0.03937”)
0.173
0.181
0.055
0.079
0.173
0.181
0.019
0.055
0.063
0.017
MAX
(5 PL)
6
5
4
1
2
3
0.094
0.102
MAX
0.084
0.090
0.035
0.021
MIN
MAX
0.059
BSC
0.118
BSC
Dwg. MA-009-6 in
Dimensions in Millimeters
4.4
4.6
1.4
1.8
4.4
4.6
0.49
1.4
1.6
0.44
MAX
(5 PL)
6
5
4
1
2
3
2.4
2.6
MAX
2.13
2.29
0.9
0.54
MIN
MAX
1.5
BSC
3.00
BSC
Dwg. MA-009-6 mm
NOTES: 1. Lead spacing tolerance is non-cumulative.
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.
2. Exact body and lead configuration at vendor’s option within limits
shown.
3.Terminal numbering is in accordance with EIA/JEDEC convention.
Where EIAJ conventions apply, the tab is not numbered, resulting
in terminal 6 being designated terminal 5.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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