Datasheet

LT3641
5
3641fa
TYPICAL PERFORMANCE CHARACTERISTICS
LV Channel Effi ciency
(2MHz, V
OUT2
= 1.8V)
Quiescent Current vs V
IN
Quiescent Current vs Temperature
HV Channel Effi ciency
(2MHz, V
OUT1
= 3.3V)
HV Channel Effi ciency
(2MHz, V
OUT1
= 5V)
LV Channel Effi ciency
(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
3641 G01
V
IN
= 12V
V
IN
= 24V
V
IN
= 16V
V
OUT1
CURRENT (A)
0
65
EFFICIENCY (%)
80
0.2 0.4 0.80.6 1.0
95
90
70
75
85
1.2 1.4 1.6 1.8
3641 G02
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
V
OUT2
CURRENT (A)
0
70
EFFICIENCY (%)
80
0.2 0.4 0.80.6 1.0
90
75
85
3641 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
3641 G05
TEMPERATURE (°C)
–50
V
IN
QUIESCENT CURRENT (μA)
200
250
300
150
100
50
0
100 150
50
0
350
3641 G06
TEMPERATURE (°C)
–50
FB1 VOLTAGE (V)
50
0
100 150
3641 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
3641 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
3641 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
3641 G03
V
IN2
= 3.3V
V
IN2
= 5V