Datasheet

3
LTC1470/LTC1471
14701fa
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
0
to t
3
Delay and Rise Time (Note 6) Transition from 0V to 3.3V, R
OUT
= 100Ω, C
OUT
= 1µF 0.2 0.32 1.0 ms
t
3
to t
5
Delay and Rise Time (Note 6) Transition from 3.3V to 5V, R
OUT
= 100Ω, C
OUT
= 1µF 0.2 0.52 1.0 ms
t
0
to t
5
Delay and Rise Time (Note 6) Transition from 0V to 5V, R
OUT
= 100Ω, C
OUT
= 1µF 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
A3V
IN
supply input pins (14, 15) must be connected together, the two
B3V
IN
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 5V
IN
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
U
W
3V
IN
= 3.3V, 5V
IN
= 5V (Note 3), T
A
= 25°C, unless otherwise noted.
(LTC1470 or 1/2 LTC1471)
3V
IN
SUPPLY VOLTAGE (V)
0
0
3V
IN
SUPPLY CURRENT (µA)
20
40
60
80
12
3
4
1470/71 G05
100
120
T
A
= 25°C
PROGRAMMED TO
3.3V, NO LOAD
3V
IN
SUPPLY VOLTAGE (V)
0
–1
3V
IN
SUPPLY CURRENT (µA)
0
1
2
3
12
3
4
1470/71 G04
4
5
T
A
= 25°C
PROGRAMMED TO OFF
3V
IN
Supply Current (3.3V ON)3V
IN
Supply Current (OFF)
5V
IN
SUPPLY VOLTAGE (V)
0
–1
5V
IN
SUPPLY CURRENT (µA)
0
1
2
3
5
1
234
1470/71 G01
56
4
T
A
= 25°C
PROGRAMMED TO OFF
5V
IN
Supply Current (OFF)
JUNCTION TEMPERATURE (°C)
0
0
3.3V SWITCH RESISTANCE (Ω)
0.05
0.10
0.15
0.20
0.25
0.30
25 50 75 100
1470/71 G07
125
PROGRAMMED
TO 3.3V
3.3V Switch Resistance
5V
IN
SUPPLY VOLTAGE (V)
0
0
5V
IN
SUPPLY CURRENT (µA)
50
100
150
200
300
1
234
1470/71 G03
56
250
T
A
= 25°C
PROGRAMMED
TO 3.3V, NO LOAD
5V
IN
Supply Current (3.3V ON)
5V
IN
Supply Current (5V ON)
5V
IN
SUPPLY VOLTAGE (V)
0
0
5V
IN
SUPPLY CURRENT (µA)
50
100
150
200
300
1
234
1470/71 G02
56
250
T
A
= 25°C
PROGRAMMED
TO 5V, NO LOAD