LF00
SERIES
VERY LOW DROP
VOLTAGE REGULATORS WITH INHIBIT
s
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, 500 µA 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 2.2 µF FOR STABILITY
AVAILABLE IN ± 1% (AB) OR ± 2% (C)
SELECTION AT 25 °C
SUPPLY VOLTAGE REJECTION: 80db (TYP.)
TEMPERATURE RANGE: -40 TO 125 °C
PENTAWATT
TO-220
TO-220FP
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
SCHEMATIC DIAGRAM
PPAK
DPAK
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 µF capacitor for
stability allowing space and cost saving.
August 2003
1/34
LF00 SERIES
ELECTRICAL CHARACTERISTICS FOR LF12C
(refer to the test circuits, T
j
= 25°C, C
I
= 0.1 µF,
C
O
= 2.2
µF
unless otherwise specified.)
Symbol
V
O
V
I
I
O
∆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,
V
I
= 2.8 V
I
O
= 5 mA
I
O
= 5 to 500 mA
ON MODE
OFF MODE
f = 120 Hz
f = 1 KHz
f = 10 KHz
Test Conditions
I
O
= 50 mA, V
I
= 3.3 V
I
O
= 50 mA, V
I
= 3.3 V, T
a
= -25 to 85°C
I
O
= 500 mA
Min.
1.225
1.2
2.5
1
2
2
0.5
50
82
77
65
50
1.25
0.8
2
10
I
O
= 0 to 500 mA
2
10
10
10
1
12
100
µA
dB
Typ.
1.25
Max.
1.275
1.3
16
V
A
mV
mV
mA
Unit
V
V
I
= 2.5 to 16V, I
O
= 0mA
V
I
= 2.6 to 16V, I
O
= 500mA
V
I
= 6 V
SVR
Supply Voltage Rejection
I
O
= 5 mA
V
I
= 3.5 ± 1 V
B = 10 Hz to 100 KHz
I
O
= 200 mA
T
a
= -40 to 125°C
T
a
= -40 to 125°C
V
I
= 6 V,
V
C
= 6 V
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
µV
V
V
V
µA
µF
Output Bypass Capacitance ESR = 0.1 to 10
Ω
ELECTRICAL CHARACTERISTICS FOR LF15AB
(refer to the test circuits, T
j
= 25°C, C
I
= 0.1 µF,
C
O
= 2.2
µF
unless otherwise specified.)
Symbol
V
O
V
I
I
O
∆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,
V
I
= 2.8 V,
I
O
= 5 mA
I
O
= 5 to 500 mA
ON MODE
OFF MODE
f = 120 Hz
f = 1 KHz
f = 10 KHz
Test Conditions
I
O
= 50 mA, V
I
= 3.5 V
I
O
= 50 mA, V
I
= 3.5 V, T
a
= -25 to 85°C
I
O
= 500 mA
Min.
1.485
1.470
2.5
1
2
2
0.5
50
82
77
65
50
1
0.8
2
10
I
O
= 0 to 500 mA
2
10
10
10
1
12
100
µA
dB
Typ.
1.5
Max.
1.515
1.530
16
V
A
mV
mV
mA
Unit
V
V
I
= 2.5 to 16V, I
O
= 0mA
V
I
= 2.8 to 16V, I
O
= 500mA
V
I
= 6 V
SVR
Supply Voltage Rejection
I
O
= 5 mA
V
I
= 3.5 ± 1 V
B = 10 Hz to 100 KHz
I
O
= 200 mA
T
a
= -40 to 125°C
T
a
= -40 to 125°C
V
I
= 6 V,
V
C
= 6 V
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
µV
V
V
V
µA
µF
Output Bypass Capacitance ESR = 0.1 to 10
Ω
5/34
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