lt3692a Linear Technology Corporation, lt3692a Datasheet - Page 7

• Manufacturer Part Number: lt3692a
• Description: Monolithic Dual Tracking 3.5a Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
2250
2000
1250
1000
2500
1750
1500
100
750
500
250
60
90
80
70
50
40
30
20
10
0
0
–50
Boost Current vs Temperature
CLKOUT Frequency
vs RT/SYNC Resistance
0
–25
10
RT/SYNC RESISTANCE (kΩ)
20
0
TEMPERATURE (°C)
90
85
80
75
70
65
60
25
30
2.5V Efficiency and Power Loss
0
0.5A
3A
1A
50
40
0.5
50
75
EFFICIENCY
1.0
OUTPUT CURRENT (A)
100 125 150
60
1.5
70
3692a G17
3692a G20
2.0
80
POWER LOSS
2.5
V
F
CH1 = 2.5V
CH2 = 0V
3.0
SW
IN
= 12V
= 1MHz
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
3.5
60
90
85
80
75
70
65
3692a G23
0
–50
0
5.0V Efficiency and Power Loss
Switch Peak Current
vs Temperature
4
–25
0.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1.0
0
OUTPUT CURRENT (A)
TEMPERATURE (°C)
EFFICIENCY
1.5
25
V
V
V
ILIM
ILIM
ILIM
2.0
50
= 1.5V
= 0.5V
= 0V
POWER LOSS
2.5
75
V
F
CH1 = 5V
CH2 = 0V
SW
100 125 150
IN
3.0
= 12V
= 1MHz
3.5
55
85
80
75
70
65
60
3692a G18
3692a G21
0
1.8V Efficiency and Power Loss
4
0.5
3.0
2.5
2.0
1.5
1.0
0.5
0
EFFICIENCY
1.0
OUTPUT CURRENT (A)
3.00
2.75
2.50
2.25
2.00
1.75
1.50
1.25
1.00
90
85
80
75
70
65
60
1.5
–50
0
Minimum Boost Voltage
vs Temperature
3.3V Efficiency and Power Loss
I
SW
2.0
–25
0.5
= 3A
POWER LOSS
2.5
0
1
EFFICIENCY
OUTPUT CURRENT (A)
TEMPERATURE (°C)
V
F
CH1 = 1.8V
CH2 = 0V
3.0
SW
25
1.5
IN
= 12V
= 1MHz
3.5
50
3692a G25
2
POWER LOSS
LT3692A
2.5
4
75
2.0
3.0
2.5
1.5
1.0
0.5
0
V
FREQ = 1MHz
CH1 = 3.3V
CH2 = 0V
100
IN
3
= 12V
125
3.5
3692a G19
3692a G22
150
4
3692af
3.0
2.5
2.0
1.5
1.0
0.5
0
7