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