LTC3412
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Load Regulation
Efficiency vs Input Voltage
Efficiency vs Frequency
0.02
0.00
98
96
94
92
90
88
86
97
96
95
94
93
92
91
V
V
= 3.3V
IN
OUT
= 2.5V
LOAD = 100mA
–0.02
–0.04
–0.06
–0.08
–0.10
–0.12
–0.14
–0.16
–0.18
LOAD = 1A
1μH
0.47μH
2.2μH
LOAD = 2.5A
V
V
= 3.3V
= 2.5V
LOAD = 1A
IN
OUT
V
= 2.5V
OUT
1MHz
Burst Mode OPERATION
Burst Mode OPERATION
0
0.5
1
1.5
2
2.5
2.55 3.05 3.55 4.05 4.55 5.05
INPUT VOLTAGE (V)
300 800 1300 1800 2300 2800 3300 3800
FREQUENCY (kHz)
LOAD CURRENT (A)
3412 G06
3412 G04
3412 G05
Load Step Transient Forced
Continuous
Load Step Transient Burst Mode
Operation
Burst Mode Operation
3412 G08
20μs/DIV
3412 G07
20μs/DIV
VIN = 3.3V, VOUT = 2.5V
LOAD STEP = 50mA TO 2.5A
3412 G09
4μs/DIV
VIN = 3.3V, VOUT = 2.5V
LOAD = 50mA
VIN = 3.3V, VOUT = 2.5V
LOAD STEP = NO LOAD TO 2.5A
Reference Voltage
vs Temperature
Switch On-Resistance
vs Input Voltage
Start-Up, Burst Mode Operation
120
100
80
60
40
20
0
0.7960
0.7955
0.7950
0.7945
0.7940
0.7935
0.7930
0.7925
0.7920
V
IN
= 3.3V
PFET ON-RESISTANCE
NFET ON-RESISTANCE
3412 G10
2.5
3
3.5
4
4.5
5
1ms/DIV
VIN = 3.3V, VOUT = 2.5V
LOAD = 1Ω
–45 –25 –5 15 35 55 75 95 115 120
INPUT VOLTAGE (V)
TEMPERATURE (°C)
3412 G12
3412 G11
3412fb
4
Linear [ Linear ]
