8183
LOW-DROPOUT,
3 V REGULA-
TOR
DISCONTINUED PRODUCT
— FOR REFERENCE ONL
Y
8183
Designed specifically to meet the requirement for extended opera-
tion 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.
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. 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
■
High Efficiency Provides Extended Battery Life
■
90 mV Typical Dropout Voltage at I
O
= 60 mA
■
45
µ
A Typical Quiescent Current at V
I
= 6 V
Less Than 1
µ
A “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
Dwg. PS-021
VR
3 V
2
SUB
3
ENABLE
1
GND
6
OUT
SUB
IN
4
SUB
5
SUB
LOW-DROPOUT, 3 V REGULATOR
— HIGH EFFICIENCY
Data Sheet
27468.4
ABSOLUTE MAXIMUM RATINGS
Input Voltage, V
I
. . . . . . . . . . . . . . 10 V
Output Current, I
O
. . . . . . . . . 150 mA*
Enable Input Voltage, V
E
. . . . . . . . . . V
I
Operating Temperature Range,
T
A
. . . . . . . . . . . . . -20
°
C to +85
°
C
Junction Temperature, T
J
. . . +150
°
C
†
Storage Temperature Range,
T
S
. . . . . . . . . . . . -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.
Always order by complete part number:
A8183SLU
.
8183
LOW-DROPOUT,
3 V REGULATOR
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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 V
I
= 8 V, T
J
= 150
°
C, Period
≤
10 s*
dc (Duty Cycle)
T
A
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
* I
O
= (T
J
- T
A
)/([V
I
- V
O
] R
θ
JA
• dc) = (150 - T
A
)/(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.
FUNCTIONAL BLOCK DIAGRAM
Dwg. FS-012-3
BIAS
DRIVE
ENABLE
THERMAL
PROTECT.
BANDGAP
REF.
ERROR
AMP
IN
ENABLE
OUT
4
6
3
2
1
5
GND
SUB
SUB
SUB
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 con-
nected together.
W
Copyright © 1994 Allegro MicroSystems, Inc.
8183
LOW-DROPOUT,
3 V REGULA-
TOR
ELECTRICAL CHARACTERISTICS at T
A
= +25
°
C (unless otherwise noted).
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Output Voltage
V
O
4 V
≤
V
I
≤
8 V,
T
A
= +25
°
C
2.95
3.00
3.05
V
10
µ
A
≤
I
O
≤
100 mA*
-20
°
C
≤
T
A
≤
+85
°
C
2.90
3.00
3.10
V
V
I
= 3 V, I
O
= 60 mA*, -20
°
C
≤
T
A
≤
+85
°
C
2.70
—
—
V
Output Volt. Temp. Coeff.
α
VO
V
I
= 6 V, I
O
= 10 mA
—
—
±
1.0
mV/
°
C
Line Regulation
∆
V
O(
∆
VI)
6 V
≤
V
I
≤
8 V, I
O
= 1 mA
—
4.0
10
mV
4 V
≤
V
I
≤
6 V, I
O
= 1 mA
—
9.5
18
mV
Load Regulation
∆
V
O(
∆
IO)
1 mA
≤
I
O
≤
100 mA*, V
I
= 8 V
—
19
30
mV
1 mA
≤
I
O
≤
100 mA*, V
I
= 6 V
—
14
25
mV
1 mA
≤
I
O
≤
100 mA*, V
I
= 4 V
—
8.0
20
mV
Dropout Voltage
V
I
min - V
O
I
O
= 60 mA*
—
90
150
mV
I
O
= 125 mA*
—
190
300
mV
Quiescent Current
I
Q
V
I
= 6 V, 1 mA
≤
I
O
≤
100 mA*, V
E
≥
2.0 V
—
45
60
µ
A
(GND terminal current)
V
I
= 8 V, 1 mA
≤
I
O
≤
100 mA*, V
E
≥
2.0 V
—
50
65
µ
A
I
Q(off)
4 V
≤
V
I
≤
8 V, V
E
≤
0.8 V
—
—
1.0
µ
A
ENABLE Input Voltage
V
EH
4 V
≤
V
I
≤
8 V,
Output ON
2.0
—
—
V
V
EL
-20
°
C
≤
T
A
≤
+85
°
C
Output OFF
—
—
0.8
V
ENABLE Input Current
I
E
T
A
≤
+85
°
C, V
E
= V
I
= 8 V
—
—
±
0.1
µ
A
Thermal Shutdown Temp.
T
J
150
—
—
°
C
Thermal Resistance
R
θ
JA
Mounted on 2.24" x 2.24" solder-coated
—
258
—
°
C/W
copper-clad board in still air
Typical values are at T
A
= +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
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
TYPICAL CHARACTERISTICS
LOAD REGULATION
LINE REGULATION
2.0
Dwg. GP-053-3
3.0
4.0
6.0
8.0
5.0
T = -20
°
C
50 mA INTERVALS
A
3.04
3.00
3.02
2.98
OUTPUT VOLTAGE in VOLTS
2.96
2.94
3.06
2.92
I = 0 mA
O
I = 100 mA
O
INPUT VOLTAGE in VOLTS
7.0
0
OUTPUT CURRENT in mA
Dwg. GP-052-3
25
50
100
150
75
T = -20
°
C
A
3.04
3.00
3.02
2.98
OUTPUT VOLTAGE in VOLTS
2.96
2.94
3.06
2.92
125
V = 8 V
I
V = 4 V
I
V = 6 V
I
2.0
Dwg. GP-053-4
3.0
4.0
6.0
8.0
5.0
T = 25
°
C
50 mA INTERVALS
A
3.04
3.00
3.02
2.98
OUTPUT VOLTAGE in VOLTS
2.96
2.94
3.06
2.92
I = 0 mA
O
INPUT VOLTAGE in VOLTS
7.0
I = 100 mA
O
0
OUTPUT CURRENT in mA
Dwg. GP-052-4
25
50
100
150
75
T = 25
°
C
2 V INTERVALS
A
3.04
3.00
3.02
2.98
OUTPUT VOLTAGE in VOLTS
2.96
2.94
3.06
2.92
125
V = 4 V
I
V = 8 V
I
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.
8183
LOW-DROPOUT,
3 V REGULA-
TOR
TYPICAL CHARACTERISTICS (cont’d)
LOAD REGULATION
LINE REGULATION
0
OUTPUT CURRENT in mA
Dwg. GP-052-5
25
50
100
150
75
T = 85
°
C
2 V INTERVALS
A
3.04
3.00
3.02
2.98
OUTPUT VOLTAGE in VOLTS
2.96
2.94
3.06
2.92
V = 4 V
I
V = 8 V
I
125
2.0
Dwg. GP-053-5
3.0
4.0
6.0
8.0
5.0
T = 85
°
C
50 mA INTERVALS
A
3.04
3.00
3.02
2.98
OUTPUT VOLTAGE in VOLTS
2.96
2.94
3.06
2.92
I = 0 mA
O
INPUT VOLTAGE in VOLTS
7.0
I = 100 mA
O
OUTPUT VOLTAGE
-50
AMBIENT TEMPERATURE in
°
C
Dwg. GP-050-1
3.01
2.99
0
+50
3.00
+100
2.98
OUTPUT VOLTAGE in VOLTS
V = 6 V
I = 0
I
O
1.0
Dwg. GP-059
2.0
4.0
3.0
INPUT VOLTAGE in VOLTS
0
3.0
2.0
2.5
1.5
OUTPUT VOLTAGE in VOLTS
1.0
0.5
3.5
0
I = 0 - 100 mA
O
T = 25
°
C
A
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.
8183
LOW-DROPOUT,
3 V REGULATOR
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
TYPICAL CHARACTERISTICS (cont’d)
QUIESCENT (GROUND TERMINAL) CURRENT
-50
AMBIENT TEMPERATURE in
°
C
Dwg. GP-051-1
45
0
+50
40
+100
35
QUIESCENT (GROUND TERMINAL) CURRENT in
µ
A
50
V = 6 V
I = 0
V
≥
2 V
I
O
E
2.0
Dwg. GP-058
4.0
8.0
6.0
INPUT VOLTAGE in VOLTS
0
60
40
30
QUIESCENT (GROUND TERMINAL) CURRENT in
µ
A
0
I = 0
O
50
20
10
T = 25
°
C
A
T = -20
°
C
A
T = 85
°
C
A
0
OUTPUT CURRENT in mA
Dwg. GP-054-1
25
50
100
150
75
T = -20
°
C
T = 25
°
C
T = 85
°
C
A
A
A
0.15
0.20
0.10
DROPOUT VOLTAGE in VOLTS 0.05
0.25
0
125
DROPOUT VOLTAGE
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.
8183
LOW-DROPOUT,
3 V REGULA-
TOR
TYPICAL CHARACTERISTICS (concluded)
LOAD TRANSIENT PERFORMANCE
V
I
= 3.2 V to 6.2 V, C
O
as specified, T
A
= 25
°
C
ENABLE TRANSIENT PERFORMANCE
V
I
= 3.2 V to 6.2 V, C
O
= 1
µ
F, T
A
= 25
°
C
Dwg. WP-028
V
O
I
O
100 mA
1 mA
3.5 V
3.0 V
2.5 V
<50
µ
s
<600
µ
s
V
O
3.25 V
3.0 V
2.75 V
C = 10
µ
F
O
C = 1
µ
F
O
Dwg. WP-027-1
V
O
V
E
0
3.0 V
0
<100
µ
s
<150
µ
s
V
I
8183
LOW-DROPOUT,
3 V REGULATOR
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Dimensions in Inches
(Based on 1 mm = 0.03937”)
Dwg. MA-009-6 in
2
3
0.059
BSC
0.019
MAX
(5 PL)
0.035
MIN
0.055
0.063
0.017
MAX
0.084
0.090
6
5
4
1
0.173
0.181
0.094
0.102
0.021
MAX
0.173
0.181
0.055
0.079
0.118
BSC
Dimensions in Millimeters
Dwg. MA-009-6 mm
2
3
1.5
BSC
0.49
MAX
(5 PL)
0.9
MIN
1.4
1.6
0.44
MAX
2.13
2.29
6
5
4
1
4.4
4.6
2.4
2.6
0.54
MAX
4.4
4.6
1.4
1.8
3.00
BSC
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.
Components made under military approvals will be in accordance
with the approval requirements.
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.
NOTES: 1. Lead spacing tolerance is non-cumulative.
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.
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