LTC3428 Datasheet, PDF (3/12 Pages) Linear Technology – 4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm 3mm DFN

TYPICAL PERFOR A CE CHARACTERISTICS
All characteristic curves at T_A = 25°C unless otherwise noted.
SWA, SWB Switching Waveforms
SW Pin and Inductor Current in
Discontinuous Mode, Demonstrating
Anti-Ring Circuit Operation
LTC3428
Transient Response, 0.5A to 1.5A
SWA
5V/DIV
SWB
2V/DIV
500mA/DIV
100mV/DIV
500mA/DIV
500ns/DIV
3428 G01
Output Voltage Ripple with 22µF
Ceramic Capacitor
50mV/DIV
500ns/DIV
3428 G04
500ns/DIV
3428 G02
Converter Efficiency
95
3.3V TO 5V
90
85
80
2.5V TO 5V
2.5V TO 3.3V
75
70
65
60
55
0.05
0.1
LOAD CURRENT (A)
1
2
3428 G05
100µs/DIV
3428 G03
Switch R_DS(ON) vs V_OUT
108
106
104
102
100
98
96
94
92
90
88
2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT VOLTAGE (V)
3428 G06
SWA, SWB Rise Time, I = 2A
1V/DIV
10ns/DIV
3428 G07
Switch R_DS(ON) vs Temperature
120
110
100
90
80
70
60
–45 –25 –5 15 35 55 75 95 115
TEMPERATURE (°C)
3428 G08
Feedback Voltage vs Temperature
1.27
1.26
1.25
1.24
1.23
1.22
–45 –25 –5 15 35 55 75
TEMPERATURE (°C)
95 115
3428 G09
3428f
3