12
Parameter
DC Input Voltage
DC Output Current
Power Dissipation
Junction Temperature
Ambient Operating Temperature
Storage Temperature
s
Features
Surface-mount package
Output current: 0.5A
Low circuit current
Iq
120
A (Output ON)
Iq(off)
20
A(Output OFF)
Low dropout voltage: V
DIF
0.3V (at I
O
=0.5A)
Output ON/OFF control terminal is compatible with LS-TTL.
Built-in thermal protection circuit
s
Applications
Portable phones and PHS telephones
Battery-driven electronic equipment
s
Absolute Maximum Ratings
(T
a
=25
C)
A8181SLB Series
Unit
V
A
W
C
C
C
Symbol
V
IN
I
O
P
D
T
j
T
op
T
stg
Surface-Mount, Low Circuit Current, Low Dropout Voltage Dropper Type
q
A8181SLB Series
Ratings
10
0.6
1.9(T
C
=25
C)
+150
20 to +85
40 to +150
Allegro Microsystems, INC. product
13
Parameter
Input Voltage
Output Voltage
Dropout Voltage
Line Regulation
Load Regulation
Temperature Coefficient
of Output Voltage
Circuit Current
Quiescent Circuit
Current
Control Voltage
(Output ON)
Control Voltage
V
C
(Output OFF)
Terminal
*
Input Current
s
Outline Drawing
s
Electrical Characteristics
Unit
V
V
V
mV
mV
mV/
C
A
A
V
V
A
A
Symbol
V
IN
V
O
Conditions
V
DIF
Conditions
V
OLINE
Conditions
V
OLOAD
Conditions
V
O
/
T
a
Conditions
I
q
Conditions
I
q(off)
Conditions
V
O(off)
Conditions
V
C. OL
Conditions
I
C
Conditions
I
C
Conditions
* Output is OFF when output ON/OFF terminal is open.
(unit: mm)
10.10/10.50
IDENTIFICATION
LEAD No.1
0.23/0.32
0
TO 8
0.40/1.27
1.27typ
0.33/0.46
0.10 MIN.
SEATING
PLANE
10.00/10.65
7.4/7.6
2.35/2.65
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
a
b
Connect V
IN
terminals (pin 7,8) and V
O
terminals
(pin 15,16) externally.
q
NC
w
NC
e
NC
r
GND
t
GND
y
V
C
u
V
IN
i
V
IN
o
NC
!00
NC
!11
NC
!2
GND
!3
GND
!4
NC
!5
V
O
!6
V
O
q
A8181SLB Series
(T
a
=25
C unless otherwise specified)
Ratings
A8181SLB
typ.
min.
max.
10
4.85
5.00
5.15
V
IN
=5.5 to 10V, I
O
=0 to 0.5A, T
a
=20 to +85
C
0.3
I
O
=0.5A
10
30
V
IN
=5.5 to 10V, I
O
=0A
50
100
V
IN
=6V, I
O
=0 to 0.5A
0.5
1.0
T
j
=20 to +85
C
92
120
V
IN
=10V, I
O
=0 to 0.5A
10
20
V
IN
=10V, I
O
=0A, V
C
=0.4V
2.4
V
IN
=10V, T
a
=20 to +85
C
0.4
V
IN
=10V, T
a
=20 to +85
C
0.1
+0.1
T
a
=25
C
1.0
+1.0
T
a
=85
C
a. Part Number
b. Lot Number
14
s
Block Diagram
s
Standard External Circuit
*1 C
1
: Oscillation prevention capacitor (Approx. 0.33
F)
*2 C
2
: Output capacitor (Approx. 4.7
F)
V
IN
V
O
GND
4,5,12,13
V
C
Reg.
Amp.
TSD
V
REF
ENABLE
Drive
u
V
IN
i
y
NC
q
,
w
,
e
,
o
,
!0
,
!1
,
!4
!5
V
O
!6
*
2
C
0
*
1
C
1
+
V
IN
V
IN
Battery
V
O
16
15
8
4, 5, 12, 13
7
6
V
O
V
C
GND
LOAD
s
T
a
-P
D
Characteristics
P
D
=I
O
[V
IN
(mean)V
O
]
q
A8181SLB Series
2.5
2.0
1.5
1.0
0.5
0
Power Dissipation P
D
(W)
Ambient Temperature T
a
(
C)
20
0
25
50
75
100
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