Datasheet

LTC3412
4
3412fb
INPUT VOLTAGE (V)
2.55 3.05 3.55 4.05 4.55 5.05
EFFICIENCY (%)
98
96
94
92
90
88
86
3412 G04
V
OUT
= 2.5V
1MHz
Burst Mode OPERATION
LOAD = 100mA
LOAD = 1A
LOAD = 2.5A
FREQUENCY (kHz)
300
800 1300 1800 2300 2800 3300 3800
EFFICIENCY (%)
97
96
95
94
93
92
91
3412 G05
V
IN
= 3.3V
V
OUT
= 2.5V
LOAD = 1A
Burst Mode OPERATION
1μH
0.47μH
2.2μH
LOAD CURRENT (A)
0
0.5 1 1.5 2 2.5
%ΔV
OUT
/V
OUT
0.02
0.00
–0.02
–0.04
–0.06
–0.08
–0.10
–0.12
–0.14
–0.16
–0.18
3412 G06
V
IN
= 3.3V
V
OUT
= 2.5V
4μs/DIV
V
OUT
20mV/DIV
I
L
200mA/DIV
3412 G07
20μs/DIV
3412 G08
V
OUT
100mV/DIV
I
L
1A/DIV
20μs/DIV
3412 G09
V
OUT
100mV/DIV
I
L
1A/DIV
Efficiency vs FrequencyEfficiency vs Input Voltage
Load Regulation
Load Step Transient Forced
ContinuousBurst Mode Operation
Load Step Transient Burst Mode
Operation
V
IN
= 3.3V, V
OUT
= 2.5V
LOAD = 50mA
V
IN
= 3.3V, V
OUT
= 2.5V
LOAD STEP = NO LOAD TO 2.5A
V
IN
= 3.3V, V
OUT
= 2.5V
LOAD STEP = 50mA TO 2.5A
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TEMPERATURE (°C)
–45 –25 –5 15 35 55 75 95 115 120
REFERENCE VOLTAGE (V)
3412 G11
0.7960
0.7955
0.7950
0.7945
0.7940
0.7935
0.7930
0.7925
0.7920
V
IN
= 3.3V
INPUT VOLTAGE (V)
2.5 3
3.5 4 4.5 5
ON-RESISTANCE (mΩ)
3412 G12
120
100
80
60
40
20
0
PFET ON-RESISTANCE
NFET ON-RESISTANCE
Start-Up, Burst Mode Operation
Reference Voltage
vs Temperature
Switch On-Resistance
vs Input Voltage
1ms/DIV
3412 G10
V
OUT
1V/DIV
V
RUN
1V/DIV
I
L
1A/DIV
V
IN
= 3.3V, V
OUT
= 2.5V
LOAD = 1Ω