Datasheet

LTC3127
5
3127f
Maximum Load Current vs V
IN
Load Transient Response in Fixed
Frequency Mode, No Load to 1A,
Not in Input Current Limit
Load Transient Response in Fixed
Frequency Mode, No Load to 1A,
in Input Current Limit
Burst Mode Operation
V
OUT
Regulation vs Load Current
(Normalized) NMOS R
DS(ON)
vs V
IN
PMOS R
DS(ON)
vs V
IN
Feedback Voltage vs Temperature
(Normalized)
Typical perForMance characTerisTics
(T
J
= 25°C, unless otherwise noted )
TEMPERATURE (°C)
–50
CHANGE (%)
0.00
–0.20
–0.40
–10
30
–30
10
50 70 90
–0.60
–0.80
0.20
3127 G09
L = 4.7µH
V
OUT
= 3.3V
V
IN
= 3.6V
V
IN
(V)
1.8
100
R
DS(ON)
(mΩ)
200
2.4 3 4.23.6 4.8
300
150
250
5.4
3127 G11
SWC
SWB
V
IN
(V)
1.8
125
R
DS(ON)
(mΩ)
225
2.4 3 4.23.6 4.8
325
175
275
5.4
3127 G12
SWD
SWA
200µs/DIV
V
OUT
50mV/DIV
I
L
1A/DIV
V
IN
= 3.6V
R
PROG
= 90k
R3 = 499k
V
OUT
= 3.3V
C
OUT
= 4.4mF
C1 = 100pF
I
IN
1A/DIV
I
LOAD
1A/DIV
3127 G14
5µs/DIV
V
OUT
20mV/DIV
I
L
500mA/DIV
3127 G16
V
IN
= 3.6V
R
PROG
= 32.4k
R3 = 499k
V
OUT
= 3.3V
C
OUT
= 4.4mF
C1 = 100pF
V
IN
(V)
1.8
LOAD CURRENT (mA)
1500
1750
4.6
1250
1000
2.6 3.4
2.2
3 3.8
5
4.2 5.4
250
0
750
2250
2000
500
3127 G13
R
PROG
= 90k
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 2.4V
LOAD CURRENT (mA)
0
–0.60
V
OUT
REGULATION (%)
–0.40
–0.20
0
200
400
600 800
0.20
0.40
–0.50
–0.30
–0.10
0.10
0.30
1000
3127 G10
V
OUT
= 3.3V
200µs/DIV
V
OUT
100mV/DIV
I
IN
500mA/DIV
I
LOAD
1A/DIV
3127 G15
MODE = 0V
V
IN
= 3.6V
R
PROG
= 32.4k
R3 = 499k
V
OUT
= 3.3V
C
OUT
= 4.4mF
C1 = 100pF