LF00AB/C
SERIES
VERY LOW DROP
VOLTAGE REGULATORS WITH INHIBIT
July 1999
s
VERY LOW DROPOUT VOLTAGE (0.45V)
s
VERY LOW QUIESCENT CURRENT
(TYP. 50
µ
A IN OFF MODE, 500
µ
A IN ON
MODE)
s
OUTPUT CURRENT UP TO 500 mA
s
LOGIC-CONTROLLED ELECTRONIC
SHUTDOWN
s
OUTPUT VOLTAGES OF 1.25; 1.5; 1.8; 2.5;
2.7; 3; 3.3; 3.5; 4; 4.5; 4.7; 5; 5.2; 5.5; 6; 8; 8.5;
9; 12V
s
INTERNAL CURRENT AND THERMAL LIMIT
s
ONLY 2.2
µ
F FOR STABILITY
s
AVAILABLE IN
±
1% (AB) OR
±
2% (C)
SELECTION AT 25
o
C
s
SUPPLY VOLTAGE REJECTION: 80 db (TYP.)
s
TEMPERATURE RANGE: -40 TO 125
o
C
DESCRIPTION
The LF00 series are very Low Drop regulators
available
in
PENTAWATT,
TO-220,
ISOWATT220, DPAK and PPAK package and in
a wide range of output voltages.
The very Low Drop voltage (0.45V) and the very
low quiescent current make them particularly
suitable for Low Noise, Low Power applications
and specially in battery powered systems.
In the 5 pins configuration (PENTAWATT and
PPAK) a Shutdown Logic Control function is
available (pin 2, TTL compatible). This means
that when the device is used as a local regulator,
it is
possible to put a part of the board in
standby, decreasing the total power consumption.
In the three terminal configuration the device has
the same electrical performance, but is fixed in
SCHEMATIC DIAGRAM
PPAK
DPAK
PENTAWATT
TO-220
ISOWATT220
®
1/32
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
i
DC Input Voltage
-0.5 t o 40 (*)
V
I
o
Output Current
I nternally limited
P
tot
Power Dissipation
I nternally limited
T
st g
Storage Temperature Range
- 40 to 150
o
C
T
op
Operating Junction Temperature Range
- 40 to 125
o
C
(*) For 18 < V
IN
< 40 the regulator is in shut-down
THERMAL DATA
Symbol
Parameter
PENTAWATT
TO-220
ISOWATT 220 DPAK/PPAK
Unit
R
thj- ca se
R
thj- amb
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
3
50
3
50
4
60
8
100
o
C/W
o
C/W
CONNECTION DIAGRAM (top view)
PENTAWATT
TO-220
ISOWATT220
PPAK
DPAK
LF00AB/C
2/32
ELECTRICAL CHARACTERISTICS FOR LF12AB (refer to the test circuits, T
j
= 25
o
C,
C
i
= 0.1
µ
F, C
o
= 2.2
µ
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
I
o
= 50 mA, V
i
= 3.3 V
I
o
= 50 mA, V
i
= 3.3 V -25<T
a
<85
o
C
1.238
1.225
1.25
1. 263
1. 275
V
V
V
i
Operating Input Voltage
I
o
= 500 mA
2.5
16
V
I
o ut
Output Current Limit
1
A
∆
V
o
Line Regulation
V
i
= 2.5 to 16 V, I
o
= 5 mA
2
10
mV
∆
V
o
Load Regulation
V
i
= 2. 8 V
I
o
= 5 to 500 mA
2
10
mV
I
d
Quiescent Current
ON MODE
V
i
= 2.5 to 16 V I
o
= 0 mA
V
i
= 2.6 to 16 V I
o
= 500 mA
0.5
1
12
mA
mA
OFF MODE V
i
= 6 V
50
100
µ
A
SVR
Supply Voltage Rejection
I
o
= 5 mA V
i
= 3.5 V
±
1V
f = 120 Hz
f = 1 KHz
f = 10 KHz
82
77
65
dB
dB
dB
eN
Output Noise Voltage
B = 10 Hz to 100 KHz
50
µ
V
V
d
Dropout Voltage
I
o
= 200 mA
1.25
V
V
il
Control Input Logic Low
-40 < T
a
< 125
o
C
0.8
V
V
ih
Control Input Logic High
-40 < T
a
< 125
o
C
2
V
I
i
Control Input Current
V
i
= 6 V,
V
c
= 6 V
10
µ
A
C
O
Output Bypass Capacitance
ESR = 0.1 to 10
Ω
I
o
= 0 to 500 mA
2
10
µ
F
ELECTRICAL CHARACTERISTICS FOR LF12C (refer to the test circuits, T
j
= 25
o
C,
C
i
= 0.1
µ
F, C
o
= 2.2
µ
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
I
o
= 50 mA, V
i
= 3.3 V
I
o
= 50 mA, V
i
= 3.3 V -25<T
a
<85
o
C
1.225
1.2
1.25
1. 275
1.3
V
V
V
i
Operating Input Voltage
I
o
= 500 mA
2.5
16
V
I
o ut
Output Current Limit
1
A
∆
V
o
Line Regulation
V
i
= 2.5 to 16 V, I
o
= 5 mA
2
10
mV
∆
V
o
Load Regulation
V
i
= 2.8 V
I
o
= 5 to 500 mA
2
10
mV
I
d
Quiescent Current
ON MODE
V
i
= 2.5 to 16 V I
o
= 0 mA
V
i
= 2.6 to 16 V I
o
= 500 mA
0.5
1
12
mA
mA
OFF MODE V
i
= 6 V
50
100
µ
A
SVR
Supply Voltage Rejection
I
o
= 5 mA V
i
= 3.5 V
±
1V
f = 120 Hz
f = 1 KHz
f = 10 KHz
82
77
65
dB
dB
dB
eN
Output Noise Voltage
B = 10 Hz to 100 KHz
50
µ
V
V
d
Dropout Voltage
I
o
= 200 mA
1.25
V
V
il
Control Input Logic Low
-40 < T
a
< 125
o
C
0.8
V
V
ih
Control Input Logic High
-40 < T
a
< 125
o
C
2
V
I
i
Control Input Current
V
i
= 6 V,
V
c
= 6 V
10
µ
A
C
O
Output Bypass Capacitance
ESR = 0.1 to 10
Ω
I
o
= 0 to 500 mA
2
10
µ
F
LF00AB/C
4/32
ELECTRICAL CHARACTERISTICS FOR LF15AB (refer to the test circuits, T
j
= 25
o
C,
C
i
= 0.1
µ
F, C
o
= 2.2
µ
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
I
o
= 50 mA, V
i
= 3.5 V
I
o
= 50 mA, V
i
= 3.5 V -25<T
a
<85
o
C
1.485
1.470
1.5
1. 515
1. 530
V
V
V
i
Operating Input Voltage
I
o
= 500 mA
2.5
16
V
I
o ut
Output Current Limit
1
A
∆
V
o
Line Regulation
V
i
= 2.5 to 16 V, I
o
= 5 mA
2
10
mV
∆
V
o
Load Regulation
V
i
= 2.8 V
I
o
= 5 to 500 mA
2
10
mV
I
d
Quiescent Current
ON MODE
V
i
= 2.5 to 16 V I
o
= 0 mA
V
i
= 2.8 to 16 V I
o
= 500 mA
0.5
1
12
mA
mA
OFF MODE V
i
= 6 V
50
100
µ
A
SVR
Supply Voltage Rejection
I
o
= 5 mA V
i
= 3.5 V
±
1V
f = 120 Hz
f = 1 KHz
f = 10 KHz
82
77
65
dB
dB
dB
eN
Output Noise Voltage
B = 10 Hz to 100 KHz
50
µ
V
V
d
Dropout Voltage
I
o
= 200 mA
1
V
V
il
Control Input Logic Low
-40 < T
a
< 125
o
C
0.8
V
V
ih
Control Input Logic High
-40 < T
a
< 125
o
C
2
V
I
i
Control Input Current
V
i
= 6 V,
V
c
= 6 V
10
µ
A
C
O
Output Bypass Capacitance
ESR = 0.1 to 10
Ω
I
o
= 0 to 500 mA
2
10
µ
F
ELECTRICAL CHARACTERISTICS FOR LF15C (refer to the test circuits, T
j
= 25
o
C,
C
i
= 0.1
µ
F, C
o
= 2.2
µ
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
I
o
= 50 mA, V
i
= 3.5 V
I
o
= 50 mA, V
i
= 3.5 V -25<T
a
<85
o
C
1.47
1.44
1.5
1.53
1.56
V
V
V
i
Operating Input Voltage
I
o
= 500 mA
2.5
16
V
I
o ut
Output Current Limit
1
A
∆
V
o
Line Regulation
V
i
= 2.5 to 16 V, I
o
= 5 mA
2
10
mV
∆
V
o
Load Regulation
V
i
= 2.8 V
I
o
= 5 to 500 mA
2
10
mV
I
d
Quiescent Current
ON MODE
V
i
= 2.5 to 16 V I
o
= 0 mA
V
i
= 2.8 to 16 V I
o
= 500 mA
0.5
1
12
mA
mA
OFF MODE V
i
= 6 V
50
100
µ
A
SVR
Supply Voltage Rejection
I
o
= 5 mA V
i
= 3.5 V
±
1V
f = 120 Hz
f = 1 KHz
f = 10 KHz
82
77
65
dB
dB
dB
eN
Output Noise Voltage
B = 10 Hz to 100 KHz
50
µ
V
V
d
Dropout Voltage
I
o
= 200 mA
1
V
V
il
Control Input Logic Low
-40 < T
a
< 125
o
C
0.8
V
V
ih
Control Input Logic High
-40 < T
a
< 125
o
C
2
V
I
i
Control Input Current
V
i
= 6 V,
V
c
= 6 V
10
µ
A
C
O
Output Bypass Capacitance
ESR = 0.1 to 10
Ω
I
o
= 0 to 500 mA
2
10
µ
F
LF00AB/C
5/32
