LT1182/83/84 데이터 시트보기 (PDF) - Linear Technology
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LT1182/83/84 Datasheet PDF : 8 Pages
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LT1305
TYPICAL PERFORMANCE CHARACTERISTICS
Low-Battery Detect Trip Point
1.250
1.245
1.240
1.235
1.230
1.225
1.220
1.215
1.210
1.205
1.200
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
LT1305 • G10
Switch Saturation Voltage
400
TA = 25°C
350
300
250
200
150
100
50
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
SWITCH CURRENT (A)
LT1305 • F12
Switch Saturation Voltage
300
ISW = 1A
250
200
150
100
50
0
– 50 – 25 0
25 50
TEMPERATURE (°C)
75 100
LT1305 • G13
PI FU CTIO S
GND (Pin 1): Signal Ground. Tie to PGND under the
package.
LBO (Pin 2): Open-Collector Output of Comparator C3.
Can sink 100µA. High impedance when device is in shut-
down.
SHDN (Pin 3): Shutdown. Pull high to shut down the
LT1305. Ground for normal operation.
FB (Pin 4): Feedback Input. Connects to main comparator
C1 input.
LBI (Pin 5): Low-Battery Comparator Input. When voltage
on this pin is below 1.24V, LBO is low.
VIN (Pin 6): Supply Pin. Must be bypassed with a large
value capacitor to gound. Keep bypass within 0.2" of the
device.
SW (Pin 7): Switch Pin. Connect inductor and diode here.
Keep layout short and direct to minimize radio frequency
interference.
PGND (Pin 8): Power Ground. Tie to signal ground (pin 1)
under the package. Bypass capacitor from VIN should be
tied directly to PGND within 0.2" of the device.
4
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