lt3640 Linear Technology Corporation, lt3640 Datasheet - Page 5

• Manufacturer Part Number: lt3640
• 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
3640 G04
3640 G07
1.2
3640 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
90
85
80
75
70
0
0
0
Quiescent Current vs V
HV Channel Effi ciency
(2MHz, V
FB1 Voltage vs SS1
0.2
0.5
10
OUT1
0.4
V
OUT1
SS1 VOLTAGE (V)
V
V
IN
IN
VOLTAGE (V)
= 5V)
= 24V
0.6
CURRENT (A)
1.0
20
0.8
V
IN
IN
V
= 16V
1.5
1.0
30
IN
= 12V
T
3640 G02
3640 G05
3640 G08
1.2
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
LT3640
IN2
= 5V
V
IN2
100
100
0.8
= 3.3V
3640 G06
3640 G03
3640 G09
5
3640p
150
150
1.0