ltc3612 Linear Technology Corporation, ltc3612 Datasheet - Page 7

• Manufacturer Part Number: ltc3612
• Description: 3a, 4mhz Monolithic Synchronous Step-down Dc/dc Converter
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.01
–0.5
–1.5
–2.5
–1.0
–2.0
100
0.1
1.0
0.5
10
0
1
0
2.25
–50
2.25
Switch On-Resistance
vs Temperature
Frequency vs Input Voltage
Dynamic Supply Current vs Input
Voltage without AVP Mode
–30
2.75
2.75
–10
MAIN SWITCH
SYNCHRONOUS SWITCH
FORCED CONTINUOUS MODE
PULSE-SKIPPING MODE
3.25
3.25
Burst Mode OPERATION
TEMPERATURE (°C)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
10
3.75
30
3.75
50
4.25
4.25
70
4.75
4.75
90
110
3612 G22
5.25
5.25
3612 G28
3612 G25
130
3000
2500
2000
1000
4500
4000
3500
1500
3000
2500
1500
1000
4000
3500
2000
0.01
500
100
500
0.1
10
0
1
0
–50
–50
0
Frequency vs Resistor on
RT/SYNC Pin
Switch Leakage vs Temperature,
Main Switch
Dynamic Supply Current vs
Temperature without AVP Mode
–30
–30
200
RESISTOR ON RT/SYNC PIN (kΩ)
V
V
V
–10
FORCED CONTINUOUS MODE
–10 10
IN
IN
IN
PULSE-SKIPPING MODE
400
= 2.25V
= 3.3V
= 5.5V
Burst Mode OPERATION
TEMPERATURE (°C)
TEMPERATURE (°C)
10
600
30
30
800
50
50
70
70
1000 1200
90
90
V
110
110 130
3612 G23
3612 G29
3612 G26
IN
1400
= 3.3V, RT/SYNC = SV
130
1V/DIV
2A/DIV
3000
2500
1500
4000
3500
2000
1000
V
–0.2
–0.4
–0.6
–0.8
–1.0
–1.2
500
0.8
0.6
0.4
0.2
OUT
0
0
I
–50
L
–50
Frequency vs Temperature
Switch Leakage vs Temperature,
Synchronous Switch
V
Forced Continuous Mode
V
I
V
OUT
OUT
MODE
OUT
–30
–30
= 0A
= 2.5V
Short to GND,
= 1.5V
V
V
V
–10
–10
IN
IN
IN
IN
= 2.25V
= 3.3V
= 5.5V
TEMPERATURE (°C)
TEMPERATURE (°C)
10
10
unless otherwise noted.
50μs/DIV
30
30
LTC3612
50
50
70
70
90 100
90
110
3612 G24
3612 G27
3612 G30
7
3612f
130
130