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LTC1471C Datasheet PDF : 12 Pages
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LTC1470/LTC1471
ELECTRICAL CHARACTERISTICS 3VIN = 3.3V, 5VIN = 5V (Note 3), TA = 25°C, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
t0 to t3
t3 to t5
t0 to t5
Delay and Rise Time (Note 6)
Delay and Rise Time (Note 6)
Delay and Rise Time (Note 6)
Transition from 0V to 3.3V, ROUT = 100Ω, COUT = 1µF
Transition from 3.3V to 5V, ROUT = 100Ω, COUT = 1µF
Transition from 0V to 5V, ROUT = 100Ω, COUT = 1µF
0.2 0.32 1.0
ms
0.2 0.52 1.0
ms
0.2 0.38 1.0
ms
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: For the LTC1470, the two output pins (1, 8) must be connected
together and the two 3.3V supply input pins (6 , 7) must be connected
together. For the LTC1471, the two AOUT pins (1, 16) must be connected
together, the two BOUT pins (8, 9) must be connected together, the two
A3VIN supply input pins (14, 15) must be connected together, the two
B3VIN supply pins (6, 7) must be connected together and the two GND
pins (5, 13) must be connected together.
Note 3: Power for the input logic and charge pump circuitry is derived
from the 5VIN supply pin(s) which must be continuously powered.
Note 4: Measured current is per channel with the other channel
programmed off for the LTC1471.
Note 5: The output is protected with foldback current limit which reduces
the short-circuit (0V) currents below peak permissible current levels at
higher output voltages.
Note 6: To 90% of final value.
Note 7: The LTC1470 is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
TYPICAL PERFORMANCE CHARACTERISTICS (LTC1470 or 1/2 LTC1471)
3VIN Supply Current (OFF)
5
TA = 25°C
4 PROGRAMMED TO OFF
3
2
1
0
–1
0
1
2
3
4
3VIN SUPPLY VOLTAGE (V)
1470/71 G04
5VIN Supply Current (3.3V ON)
300
TA = 25°C
250 PROGRAMMED
TO 3.3V, NO LOAD
200
150
100
50
0
012
3
4
56
5VIN SUPPLY VOLTAGE (V)
1470/71 G03
3VIN Supply Current (3.3V ON)
120
TA = 25°C
100
PROGRAMMED TO
3.3V, NO LOAD
80
60
40
20
0
0
1
2
3
4
3VIN SUPPLY VOLTAGE (V)
1470/71 G05
5VIN Supply Current (5V ON)
300
TA = 25°C
250 PROGRAMMED
TO 5V, NO LOAD
200
150
100
50
0
0
1
2
3
4
56
5VIN SUPPLY VOLTAGE (V)
1470/71 G02
5VIN Supply Current (OFF)
5
TA = 25°C
PROGRAMMED TO OFF
4
3
2
1
0
–1
0
1
2
3
4
56
5VIN SUPPLY VOLTAGE (V)
1470/71 G01
3.3V Switch Resistance
0.30
PROGRAMMED
0.25 TO 3.3V
0.20
0.15
0.10
0.05
0
0
25
50
75 100 125
JUNCTION TEMPERATURE (°C)
1470/71 G07
14701fa
3
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