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February 2003
s
VERY LOW DROPOUT VOLTAGE (0.45V)
s
VERY LOW QUIESCENT CURRENT (TYP.
50 A IN OFF MODE, 500 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 F FOR STABILITY
s
AVAILABLE IN 1% (AB) OR 2% (C)
SELECTION AT 25 C
s
SUPPLY VOLTAGE REJECTION: 80db (TYP.)
s
TEMPERATURE RANGE: -40 TO 125 C
DESCRIPTION
The LF00 series are very Low Drop regulators
available in PENTAWATT, TO-220, TO-220FP,
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 the ON
state. It requires only a 2.2 F capacitor for
stability allowing space and cost saving.
LF00
SERIES
VERY LOW DROP
VOLTAGE REGULATORS WITH INHIBIT
SCHEMATIC DIAGRAM
TO-220
PENTAWATT
DPAK
PPAK
TO-220FP
LF00 SERIES
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ABSOLUTE MAXIMUM RATINGS
(*) For 18 < V
IN
< 40 the regulator is in shut-down
THERMAL DATA
CONNECTION DIAGRAM (top view)
Symbol
Parameter
Value
Unit
V
I
DC Input Voltage
-0.5 to 40 (*)
V
I
O
Output Current
Internally Limited
P
tot
Power Dissipation
Internally Limited
T
stg
Storage Temperature Range
-40 to 150
C
T
op
Operating Junction Temperature Range
-40 to 125
C
Symbol
Parameter
PENTAWATT
TO-220
TO-220FP
DPAK/PPAK
Unit
R
thj-case
Thermal Resistance Junction-case
3
3
5
8
C/W
R
thj-amb
Thermal Resistance Junction-ambient
50
50
60
100
C/W
TO-220
TO-220FP
DPAK
PPAK
PENTAWATT
LF00 SERIES
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TEST CIRCUITS
ELECTRICAL CHARACTERISTICS FOR LF12AB (refer to the test circuits, T
j
= 25C, C
I
= 0.1 F,
C
O
= 2.2
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
1.238
1.25
1.263
V
I
O
= 50 mA, V
I
= 3.3 V, T
a
= -25 to 85C
1.225
1.275
V
I
Operating Input Voltage
I
O
= 500 mA
2.5
16
V
I
O
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
V
I
= 2.5 to 16V, I
O
= 0mA
ON MODE
0.5
1
mA
V
I
= 2.6 to 16V, I
O
= 500mA
12
V
I
= 6 V
OFF MODE
50
100
A
SVR
Supply Voltage Rejection
I
O
= 5 mA
V
I
= 3.5 1 V
f = 120 Hz
82
dB
f = 1 KHz
77
f = 10 KHz
65
eN
Output Noise Voltage
B = 10 Hz to 100 KHz
50
V
V
d
Dropout Voltage
I
O
= 200 mA
1.25
V
V
IL
Control Input Logic Low
T
a
= -40 to 125C
0.8
V
V
IH
Control Input Logic High
T
a
= -40 to 125C
2
V
I
I
Control Input Current
V
I
= 6 V,
V
C
= 6 V
10
A
C
O
Output Bypass Capacitance ESR = 0.1 to 10
I
O
= 0 to 500 mA
2
10
F
LF00 SERIES
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ELECTRICAL CHARACTERISTICS FOR LF12C (refer to the test circuits, T
j
= 25C, C
I
= 0.1 F,
C
O
= 2.2
F unless otherwise specified.)
ELECTRICAL CHARACTERISTICS FOR LF15AB (refer to the test circuits, T
j
= 25C, C
I
= 0.1 F,
C
O
= 2.2
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
1.225
1.25
1.275
V
I
O
= 50 mA, V
I
= 3.3 V, T
a
= -25 to 85C
1.2
1.3
V
I
Operating Input Voltage
I
O
= 500 mA
2.5
16
V
I
O
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
V
I
= 2.5 to 16V, I
O
= 0mA
ON MODE
0.5
1
mA
V
I
= 2.6 to 16V, I
O
= 500mA
12
V
I
= 6 V
OFF MODE
50
100
A
SVR
Supply Voltage Rejection
I
O
= 5 mA
V
I
= 3.5 1 V
f = 120 Hz
82
dB
f = 1 KHz
77
f = 10 KHz
65
eN
Output Noise Voltage
B = 10 Hz to 100 KHz
50
V
V
d
Dropout Voltage
I
O
= 200 mA
1.25
V
V
IL
Control Input Logic Low
T
a
= -40 to 125C
0.8
V
V
IH
Control Input Logic High
T
a
= -40 to 125C
2
V
I
I
Control Input Current
V
I
= 6 V,
V
C
= 6 V
10
A
C
O
Output Bypass Capacitance ESR = 0.1 to 10
I
O
= 0 to 500 mA
2
10
F
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
O
Output Voltage
I
O
= 50 mA, V
I
= 3.5 V
1.485
1.5
1.515
V
I
O
= 50 mA, V
I
= 3.5 V, T
a
= -25 to 85C
1.470
1.530
V
I
Operating Input Voltage
I
O
= 500 mA
2.5
16
V
I
O
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
V
I
= 2.5 to 16V, I
O
= 0mA
ON MODE
0.5
1
mA
V
I
= 2.8 to 16V, I
O
= 500mA
12
V
I
= 6 V
OFF MODE
50
100
A
SVR
Supply Voltage Rejection
I
O
= 5 mA
V
I
= 3.5 1 V
f = 120 Hz
82
dB
f = 1 KHz
77
f = 10 KHz
65
eN
Output Noise Voltage
B = 10 Hz to 100 KHz
50
V
V
d
Dropout Voltage
I
O
= 200 mA
1
V
V
IL
Control Input Logic Low
T
a
= -40 to 125C
0.8
V
V
IH
Control Input Logic High
T
a
= -40 to 125C
2
V
I
I
Control Input Current
V
I
= 6 V,
V
C
= 6 V
10
A
C
O
Output Bypass Capacitance ESR = 0.1 to 10
I
O
= 0 to 500 mA
2
10
F
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