Datasheet

LTC3852
8
3852f
TYPICAL PERFORMANCE CHARACTERISTICS
Charge Pump
SHDN LO-to-HI Threshold
vs Temperature
Charge Pump
SHDN HI-to-LO Threshold
vs Temperature
Charge Pump Short-Circuit
Current vs Supply Voltage
TEMPERATURE (oC)
–50 150
0
50
100
3852 G32
SHDN THRESHOLD LO-TO-HI (V)
0.7
0.8
0.6
0.5
0.9
V
IN
= 3.2V
V
IN
= 2.4V
TEMPERATURE (oC)
–50 150
3852 G33
0
50
100
SHDN THRESHOLD HI-TO-LO (V)
0.6
0.7
0.5
0.4
0.8
V
IN
= 3.2V
V
IN
= 2.4V
SUPPLY VOLTAGE (V)
SHORT-CIRCUIT CURRENT (mA)
350
300
250
200
150
100
50
0
3852 G34
1.5
2.0
2.5 3.0 3.5 4.0 4.5
DEVICE CYCLES
IN AND OUT OF
THERMAL SHUTDOWN
Charge Pump Load Regulation
Charge Pump Output Load
Capability at 4% Below Regulation
Charge Pump Effective Open-Loop
Output Resistance vs Temperature
3852 G35
LOAD CURRENT (mA)
0
5.20
5.10
5.00
4.90
4.80
4.70
4.60
4.50
300
100 200 400 500
OUTPUT VOLTAGE (V)
V
IN
= 4.2V
V
IN
= 2.7V
V
IN
= 3.6V
3852 G36
SUPPLY VOLTAGE (V)
2.4
OUTPUT LOAD (mA)
2.9 3.4 3.9
500
450
400
350
300
250
200
150
100
50
0
125°C
85°C
25°C
–45°C
TEMPERATURE
(
oC
)
EFFECTIVE OPEN-LOOP OUTPUT RESISTANCE ()
100
050
V
IN
= 2.7V
V
OUT
= 4.5V
–50
8
7
6
5
4