LTC3616 Datasheet, PDF (7/28 Pages) Linear Technology – 6A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter

LTC3616
TYPICAL PERFORMANCE CHARACTERISTICS V_IN = 3.3V, RT/SYNC = SV_IN unless otherwise noted.
Switch On-Resistance
vs Temperature
0.045
0.040
0.035
MAIN SWITCH
0.030
0.025
SYNCHRONOUS SWITCH
0.020
0.015
0.010
0.005
0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3616 G22
Frequency vs Input Voltage
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5
2.25 2.75 3.25 3.75 4.25 4.75 5.25
INPUT VOLTAGE (V)
3616 G25
Dynamic Supply Current vs Input
Voltage without AVP Mode
100
FORCED CONTINUOUS MODE
10
PULSE-SKIPPING MODE
1
Burst Mode OPERATION
0.1
Frequency vs Resistor on
RT/SYNC Pin
4500
4000
3500
3000
2500
2000
1500
1000
500
0
0 200 400 600 800 1000 1200 1400
RESISTOR ON RT/SYNC PIN (kΩ)
3616 G23
Switch Leakage vs Temperature,
Main Switch
8000
7000
6000
V_IN = 2.25V
V_IN = 3.3V
V_IN = 5.5V
5000
4000
3000
2000
1000
0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3616 G26
Dynamic Supply Current vs
Temperature without AVP Mode
100
Frequency vs Temperature
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–1.2
–50 –30 –10 10 30 50 70 90 100 130
TEMPERATURE (°C)
3616 G24
Switch Leakage vs Temperature,
Synchronous Switch
8000
7000
6000
V_IN = 2.25V
V_IN = 3.3V
V_IN = 5.5V
5000
4000
3000
2000
1000
0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3616 G27
V_OUT Short to GND,
Forced Continuous Mode
FORCED CONTINUOUS MODE
10
PULSE-SKIPPING MODE
1
Burst Mode OPERATION
0.1
V_OUT
500mV/DIV
I_L
5A/DIV
0.01
2.25 2.75 3.25 3.75 4.25 4.75 5.25
INPUT VOLTAGE (V)
3616 G28
0.01
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3616 G29
V_OUT = 1.8V
I_OUT = 0A
V_MODE = 1.5V
100μs/DIV
3616 G30
3616f
7