lt3641 Linear Technology Corporation, lt3641 Datasheet - Page 5

• Manufacturer Part Number: lt3641
• Description: Dual Monolithic Buck Regulator With Power-on Reset And Watchdog Timer
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
90
85
70
90
85
80
75
70
80
75
–50
0
HV Channel Effi ciency
(2MHz, V
0
LV Channel Effi ciency
(2MHz, V
FB1 Voltage vs Temperature
0.2
0.2
0
OUT1
OUT2
0.4
V
V
TEMPERATURE (°C)
RST1 THRESHOLD
OUT2
OUT1
REGULATION
V
0.4
V
IN
= 3.3V)
IN
= 1.8V)
CURRENT (A)
0.6
CURRENT (A)
= 16V
= 24V
50
V
0.6
0.8
IN2
= 5V
V
V
IN2
IN
100
1.0
= 12V
0.8
= 3.3V
3641 G04
3641 G07
1.2
3641 G01
150
1.0
0.35
0.30
0.20
0.15
0.10
0.00
0.25
0.05
1.4
1.2
1.0
0.8
0.6
0.0
0.4
0.2
95
90
85
80
75
70
65
0
0
0
Quiescent Current vs V
HV Channel Effi ciency
(2MHz, V
FB1 Voltage vs SS1
0.2 0.4
0.5
10
OUT1
V
0.6
OUT1
SS1 VOLTAGE (V)
V
IN
VOLTAGE (V)
= 5V)
0.8
CURRENT (A)
1.0
20
1.0
1.2 1.4 1.6 1.8
IN
1.5
30
V
V
V
V
IN
IN
IN
IN
T
= 12V
= 24V
= 36V
= 48V
3641 G02
3641 G05
3641 G08
A
= 25°C, unless otherwise noted.
2.0
40
0.70
0.65
0.60
0.55
0.50
0.45
350
300
250
200
150
100
90
85
80
75
70
50
0
–50
–50
0
Quiescent Current vs Temperature
FB2 Voltage vs Temperature
LV Channel Effi ciency
(2MHz, V
0.2
0
0
OUT2
V
TEMPERATURE (°C)
TEMPERATURE (°C)
RST2 THRESHOLD
OUT2
REGULATION
0.4
= 1.2V)
CURRENT (A)
50
50
V
0.6
LT3641
IN2
= 5V
V
IN2
100
100
0.8
= 3.3V
3641 G06
3641 G03
3641 G09
5
3641f
150
150
1.0