®
LF00AB/C
SERIES
VERY LOW DROP
VOLTAGE REGULATORS WITH INHIBIT
s
s
s
s
s
s
s
s
s
VERY LOW DROPOUT VOLTAGE (0.45V)
VERY LOW QUIESCENT CURRENT
(TYP. 50
µA
IN OFF MODE, 500µA IN ON
MODE)
OUTPUT CURRENT UP TO 500 mA
LOGIC-CONTROLLED ELECTRONIC
SHUTDOWN
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
INTERNAL CURRENT AND THERMAL LIMIT
ONLY 2.2µF FOR STABILITY
AVAILABLEIN
±
1% (AB) OR
±
2% (C)
SELECTION AT 25
o
C
SUPPLY VOLTAGE REJECTION: 80 db (TYP.)
TEMPERATURE RANGE: -40 TO 125
o
C
PENTAWATT
TO-220
ISOWATT220
s
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.
SCHEMATIC DIAGRAM
PPAK
DPAK
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
July 1999
1/32
LF00AB/C
ABSOLUTE MAXIMUM RATINGS
Symbol
V
i
I
o
P
tot
T
st g
T
op
DC Input Voltage
Output Current
Power Dissipation
Storage Temperature Range
Operating Junction Temperature Range
Parameter
Value
-0.5 to 40 (*)
Internally limited
Internally limited
- 40 to 150
- 40 to 125
o
o
Unit
V
C
C
(*) For 18 < V
IN
< 40 the regulator is in shut-down
THERMAL DATA
Symbol
Parameter
PENTAWATT
3
50
TO-220
3
50
ISOWATT 220 DPAK/PPAK
4
60
8
100
Unit
o
o
R
thj- ca se
Thermal Resistance Junction-case
R
thj- amb
Thermal Resistance Junction-ambient
C/W
C/W
CONNECTION DIAGRAM
(top view)
PENTAWATT
TO-220
ISOWATT220
PPAK
DPAK
2/32
LF00AB/C
ELECTRICAL CHARACTERISTICS FOR LF12AB
(refer to the test circuits, T
j
= 25
o
C,
C
i
= 0.1
µF,
C
o
= 2.2
µF
unless otherwise specified)
Symbol
V
o
V
i
I
o ut
∆V
o
∆V
o
I
d
Parameter
Output Voltage
Operating Input Voltage
Output Current Limit
Line Regulation
Load Regulation
Quiescent Current
V
i
= 2.5 to 16 V, I
o
= 5 mA
V
i
= 2.8 V
I
o
= 5 to 500 mA
ON MODE
V
i
= 2.5 to 16 V I
o
= 0 mA
V
i
= 2.6 to 16 V I
o
= 500 mA
OFF MODE V
i
= 6 V
SVR
Supply Voltage Rejection
I
o
= 5 mA V
i
= 3.5 V
±
1V
f = 120 Hz
f = 1 KHz
f = 10 KHz
B = 10 Hz to 100 KHz
I
o
= 200 mA
-40 < T
a
< 125 C
-40 < T
a
< 125 C
V
i
= 6 V, V
c
= 6 V
ESR = 0.1 to 10
Ω
I
o
= 0 to 500 mA
2
o
o
Test Conditions
I
o
= 50 mA, V
i
= 3.3 V
I
o
= 50 mA, V
i
= 3.3 V -25<T
a
<85
o
C
I
o
= 500 mA
Min.
1.238
1.225
2.5
Typ.
1.25
Max.
1.263
1.275
16
Unit
V
V
V
A
mV
mV
mA
mA
µ
A
dB
dB
dB
µ
V
V
1
2
2
0.5
50
82
77
65
50
1.25
0.8
2
10
10
10
10
1
12
100
eN
V
d
V
il
V
ih
I
i
C
O
Output Noise Voltage
Dropout Voltage
Control Input Logic Low
Control Input Logic High
Control Input Current
Output Bypass Capacitance
V
V
µ
A
µ
F
ELECTRICAL CHARACTERISTICS FOR LF12C
(refer to the test circuits, T
j
= 25
o
C,
C
i
= 0.1
µF,
C
o
= 2.2
µF
unless otherwise specified)
Symbol
V
o
V
i
I
o ut
∆
V
o
∆V
o
I
d
Parameter
Output Voltage
Operating Input Voltage
Output Current Limit
Line Regulation
Load Regulation
Quiescent Current
V
i
= 2.5 to 16 V, I
o
= 5 mA
V
i
= 2.8 V
I
o
= 5 to 500 mA
ON MODE
V
i
= 2.5 to 16 V I
o
= 0 mA
V
i
= 2.6 to 16 V I
o
= 500 mA
OFF MODE V
i
= 6 V
SVR
Supply Voltage Rejection
I
o
= 5 mA V
i
= 3.5 V
±
1V
f = 120 Hz
f = 1 KHz
f = 10 KHz
B = 10 Hz to 100 KHz
I
o
= 200 mA
-40 < T
a
< 125
o
C
-40 < T
a
< 125 C
V
i
= 6 V, V
c
= 6 V
ESR = 0.1 to 10
Ω
I
o
= 0 to 500 mA
2
o
Test Conditions
I
o
= 50 mA, V
i
= 3.3 V
I
o
= 50 mA, V
i
= 3.3 V -25<T
a
<85
o
C
I
o
= 500 mA
Min.
1.225
1.2
2.5
Typ.
1.25
Max.
1.275
1.3
16
Unit
V
V
V
A
mV
mV
mA
mA
µ
A
dB
dB
dB
µ
V
V
1
2
2
0.5
50
82
77
65
50
1.25
0.8
2
10
10
10
10
1
12
100
eN
V
d
V
il
V
ih
I
i
C
O
Output Noise Voltage
Dropout Voltage
Control Input Logic Low
Control Input Logic High
Control Input Current
Output Bypass Capacitance
V
V
µA
µ
F
4/32
LF00AB/C
ELECTRICAL CHARACTERISTICS FOR LF15AB
(refer to the test circuits, T
j
= 25
o
C,
C
i
= 0.1
µF,
C
o
= 2.2
µF
unless otherwise specified)
Symbol
V
o
V
i
I
o ut
∆V
o
∆V
o
I
d
Parameter
Output Voltage
Operating Input Voltage
Output Current Limit
Line Regulation
Load Regulation
Quiescent Current
V
i
= 2.5 to 16 V, I
o
= 5 mA
V
i
= 2.8 V
I
o
= 5 to 500 mA
ON MODE
V
i
= 2.5 to 16 V I
o
= 0 mA
V
i
= 2.8 to 16 V I
o
= 500 mA
OFF MODE V
i
= 6 V
SVR
Supply Voltage Rejection
I
o
= 5 mA V
i
= 3.5 V
±
1V
f = 120 Hz
f = 1 KHz
f = 10 KHz
B = 10 Hz to 100 KHz
I
o
= 200 mA
-40 < T
a
< 125 C
-40 < T
a
< 125 C
V
i
= 6 V, V
c
= 6 V
ESR = 0.1 to 10
Ω
I
o
= 0 to 500 mA
2
o
o
Test Conditions
I
o
= 50 mA, V
i
= 3.5 V
I
o
= 50 mA, V
i
= 3.5 V -25<T
a
<85
o
C
I
o
= 500 mA
Min.
1.485
1.470
2.5
Typ.
1.5
Max.
1.515
1.530
16
Unit
V
V
V
A
mV
mV
mA
mA
µ
A
dB
dB
dB
µ
V
V
1
2
2
0.5
50
82
77
65
50
1
0.8
2
10
10
10
10
1
12
100
eN
V
d
V
il
V
ih
I
i
C
O
Output Noise Voltage
Dropout Voltage
Control Input Logic Low
Control Input Logic High
Control Input Current
Output Bypass Capacitance
V
V
µ
A
µ
F
ELECTRICAL CHARACTERISTICS FOR LF15C
(refer to the test circuits, T
j
= 25
o
C,
C
i
= 0.1
µF,
C
o
= 2.2
µF
unless otherwise specified)
Symbol
V
o
V
i
I
o ut
∆
V
o
∆V
o
I
d
Parameter
Output Voltage
Operating Input Voltage
Output Current Limit
Line Regulation
Load Regulation
Quiescent Current
V
i
= 2.5 to 16 V, I
o
= 5 mA
V
i
= 2.8 V
I
o
= 5 to 500 mA
ON MODE
V
i
= 2.5 to 16 V I
o
= 0 mA
V
i
= 2.8 to 16 V I
o
= 500 mA
OFF MODE V
i
= 6 V
SVR
Supply Voltage Rejection
I
o
= 5 mA V
i
= 3.5 V
±
1V
f = 120 Hz
f = 1 KHz
f = 10 KHz
B = 10 Hz to 100 KHz
I
o
= 200 mA
-40 < T
a
< 125
o
C
-40 < T
a
< 125 C
V
i
= 6 V, V
c
= 6 V
ESR = 0.1 to 10
Ω
I
o
= 0 to 500 mA
2
o
Test Conditions
I
o
= 50 mA, V
i
= 3.5 V
I
o
= 50 mA, V
i
= 3.5 V -25<T
a
<85
o
C
I
o
= 500 mA
Min.
1.47
1.44
2.5
Typ.
1.5
Max.
1.53
1.56
16
Unit
V
V
V
A
mV
mV
mA
mA
µ
A
dB
dB
dB
µ
V
V
1
2
2
0.5
50
82
77
65
50
1
0.8
2
10
10
10
10
1
12
100
eN
V
d
V
il
V
ih
I
i
C
O
Output Noise Voltage
Dropout Voltage
Control Input Logic Low
Control Input Logic High
Control Input Current
Output Bypass Capacitance
V
V
µA
µ
F
5/32
嵌入式系统
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