Datasheet

LT3640
5
3640f
Typical perForMance characTerisTics
LV Channel Efficiency
(2MHz, V
OUT2
= 1.8V)
Quiescent Current vs V
IN
Quiescent Current vs Temperature
HV Channel Efficiency
(2MHz, V
OUT1
= 3.3V)
HV Channel Efficiency
(2MHz, V
OUT1
= 5V)
LV Channel Efficiency
(2MHz, V
OUT2
= 1.2V)
T
A
= 25°C, unless otherwise noted.
FB1 Voltage vs Temperature
FB1 Voltage vs SS1
FB2 Voltage vs Temperature
V
OUT1
CURRENT (A)
0
70
EFFICIENCY (%)
80
0.2 0.4 0.80.6 1.0
90
75
85
1.2
3640 G01
V
IN
= 12V
V
IN
= 24V
V
IN
= 16V
V
OUT1
CURRENT (A)
0
70
EFFICIENCY (%)
80
0.2 0.4 0.80.6 1.0
90
75
85
1.2
3640 G02
V
IN
= 12V
V
IN
= 24V
V
IN
= 16V
V
OUT2
CURRENT (A)
0
70
EFFICIENCY (%)
80
0.2 0.4 0.80.6 1.0
90
75
85
3640 G04
V
IN2
= 3.3V
V
IN2
= 5V
V
IN
VOLTAGE (V)
0
V
IN
QUIESCENT CURRENT (mA)
0.20
0.25
0.30
0.15
0.10
20
10
30 40
0.05
0.00
0.35
3640 G05
TEMPERATURE (°C)
–50
V
IN
QUIESCENT CURRENT (µA)
200
250
300
150
100
50
0
100 150
50
0
350
3640 G06
TEMPERATURE (°C)
–50
FB1 VOLTAGE (V)
50
0
100 150
3640 G07
1.00
1.10
1.20
1.30
1.40
1.05
1.15
1.25
1.35
REGULATION
RST1 THRESHOLD
SS1 VOLTAGE (V)
FB1 VOLTAGE (V)
1.00
0.5
1.5 2.0
3640 G08
0.0
0.4
0.8
1.2
1.4
0.2
0.6
1.0
TEMPERATURE (°C)
–50
FB2 VOLTAGE (V)
50
0
100 150
3640 G09
0.45
0.55
0.65
0.70
0.50
0.60
REGULATION
RST2 THRESHOLD
V
OUT2
CURRENT (A)
0
70
EFFICIENCY (%)
80
0.2 0.4 0.80.6 1.0
90
75
85
3640 G03
V
IN2
= 3.3V
V
IN2
= 5V