LT3685_15 Datasheet, PDF (6/24 Pages) Linear Technology – 36V, 2A, 2.4MHz Step-Down Switching Regulator

LT3685
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise noted.
Minimum Input Voltage
5.0
4.5
4.0
3.5
3.0
2.5 _{VOUT = 3.3V}
L = 4.7μH
2.0 ^{f = 800kHz}
1
10
100
1000
LOAD CURRENT (A)
10000
3685 G17
Power Good Threshold
95
90
Minimum Input Voltage
6.5
V_C Voltages
2.50
6.0
2.00
CURRENT LIMIT CLAMP
1.50
5.5
5.0
4.5 _{VOUT = 5V}
L = 4.7μH
4.0 ^{f = 800kHz}
1
10
100
1000
LOAD CURRENT (A)
10000
3685 G18
Switching Waveforms;
Discontinuous Operation
1.00
SWITCHING THRESHOLD
0.50
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3685 G19
Switching Waveforms;
Continuous Operation
V_SW
5V/DIV
V_SW
5V/DIV
85
I_L
I_L
0.5A/DIV
1A/DIV
80
V_OUT
V_OUT
10mV/DIV
10mV/DIV
75
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3685 G20
1μs/DIV
V_IN = 12V; FRONT PAGE APPLICATION
I_LOAD = 110mA
3685 G21
1μs/DIV
V_IN = 12V; FRONT PAGE APPLICATION
I_LOAD = 1A
3685 G22
3685fb
6