LTC1177-12 Ver la hoja de datos (PDF) - Linear Technology
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LTC1177-12 Datasheet PDF : 8 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LTC1177-5/LTC1177-12
LTC1177-12
Output Voltage vs Temperature
6.4
VIN = 12V
6.2 NO LOAD
6.0
SW28
5.8
N18
5.6
5.4
5.2
5.0
–55 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1177-12 G13
LTC1177-12
Output Voltage vs Input Voltage
8
TA = 25°C
7
SW28
6
N18
5
4
3
9 10 11 12 13 14 15
INPUT VOLTAGE (V)
1177-12 G15
LTC1177-12
Input Current vs Temperature
3.0
VIN = 12V
2.8
NO LOAD
2.6
2.4
N18
2.2
SW28
2.0
1.8
1.6
–55 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1177-12 G14
LTC1177-12
Input Current vs Input Voltage
3.4
TA = 25°C
3.0
2.6
N18
2.2
SW28
1.8
1.4
9
10 11 12 13 14 15
INPUT VOLTAGE (V)
1177-12 G16
PIN FUNCTIONS
VIN: Voltage Input, 5.25V ≥ VIN ≥ 4.75V (LTC1177-5) and
12.6V ≥ VIN ≥ 11.4V (LTC1177-12). Connect a 0.01µF
capacitor between VIN and GND1 when the source imped-
ance is high or the VIN connection is long.
OUT: Output Voltage. The output voltage level is 8V (typ)
for SW package and 7.5V (typ) for N package (LTC1177-
5) with 5V at VIN pin; 5.7V (typ) for SW package and 5.2V
(typ) for N package (LTC1177-12) with 12V at VIN pin. This
pin is to drive the gate of the external N-channel MOSFET.
SENSE: Current Limit Sense Input. Connecting a 1Ω resis-
tor from the Sense pin to GND2 limits the current through
the power MOSFET to 620mA (typ). ILIM = 620mV/RSENSE.
GND2: Floating Ground Connects to the source of the
external N-channel MOSFET.
GND1: Input Ground. The ground connection of the input
control signal.
5
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