LTC3815_15 Datasheet, PDF (9/42 Pages) Linear Technology – 6A Monolithic Synchronous DC/DC Step-Down Converter with Digital Power System Management

Typical Performance Characteristics
LTC3815
Normal Start-Up
RUN
2V/DIV
V_OUT
0.5V/DIV
PGOOD
2V/DIV
I_L
1A/DIV
V_OUT = 1V
MODE = 0
500µs/DIV
FRONT PAGE CIRCUIT
Start-Up Into Pre-Biased Output
V_OUT Short and Recovery
3815 G27
RUN
2V/DIV
V_OUT
0.5V/DIV
PGOOD
2V/DIV
I_L
1A/DIV
V_OUT = 1V
MODE = 0
500µs/DIV
FRONT PAGE CIRCUIT
V_OUT
0.5V/DIV
I_L
5A/DIV
3815 G28
500µs/DIV
3815 G29
Switch On-Resistance
vs Input Voltage
60
SYNCHRONOUS SWITCH
50
MAIN SWITCH
40
30
20
10
0
2
3
4
5
6
INPUT VOLTAGE (v)
3815 G30
Switch Leakage vs Temperature,
Synchronous Switch
12
11
9
8
6
5
3
2
0
–50
0
50
100
150
TEMPERATURE (°C)
3815 G33
Switch On-Resistance
vs Temperature
60
SYNCHRONOUS SWITCH
50
MAIN SWITCH
40
30
20
10
0
–50
0
50
100
150
TEMPERATURE (°C)
3815 G31
Dynamic Supply Current
vs Input Voltage
40
33
27
20
13
7
1MHz
2MHz
0
2
3
4
5
6
INPUT VOLTAGE (v)
3815 G34
For more information www.linear.com/LTC3815
Switch Leakage
vs Temperature, Main Switch
10
9
8
6
5
4
3
1
0
–50
0
50
100
150
TEMPERATURE (°C)
3815 G32
Minimum V_IN vs Load, V_OUT and
Frequency
3.5
V_OUT=1.2V, 1MHz
V_OUT=1.2V, 2MHz
V_OUT=1.8V, 1MHz
3.0
V_OUT=1.8V, 2MHz
2.5
2.0
1.5
0
1
2
3
4
5
6
LOAD CURRENT (A)
3815 G35
3815p
9