Datasheet

LTC3129
7
3129fa
For more information www.linear.com/LTC3129
Fixed Frequency Ripple on V
OUT
Typical perForMance characTerisTics
Step Load Transient Response in
Fixed Frequency
Step Load Transient Response in
Burst Mode Operation
PGOOD Response to a Drop
On V
OUT
Burst Mode Waveforms
Burst Mode Ripple on V
OUT
Start-Up Waveforms
T
A
= 25°C, unless otherwise noted.
MPPC Response to a Step Load
L = 10µH
V
IN
= 7V
V
OUT
= 5V
I
OUT
= 200mA
C
OUT
= 10µF
3129 G22
200ns/DIV
I
L
200mA/DIV
V
OUT
20mV/DIV
L = 10µH
V
IN
= 7V
V
OUT
= 5V
I
OUT
= 5mA
C
OUT
= 22µF (WITH THE RECOMMENDED
FEEDFORWARD CAPACITOR)
3129 G24
100µs/DIV
I
L
100mA/DIV
V
OUT
100mV/DIV
V
IN
= 7V
V
OUT
= 5V
I
OUT
= 50mA
C
OUT
= 22µF
3129 G25
1ms/DIV
I
VIN
200mA/DIV
V
OUT
5V/DIV
V
CC
5V/DIV
RUN
5V/DIV
L = 10µH
V
IN
= 7V
V
OUT
= 5V
C
OUT
= 10µF
I
OUT
= 50mA to 150mA STEP
3129 G26
500µs/DIV
I
VOUT
100mA/DIV
V
OUT
100mV/DIV
L = 10µH
V
IN
= 7V
V
OUT
= 5V
C
OUT
= 22µF (WITH THE RECOMMENDED
FEEDFORWARD CAPACITOR)
I
OUT
= 5mA to 125mA STEP
3129 G27
500µs/DIV
I
VOUT
100mA/DIV
V
OUT
100mV/DIV
V
OUT
= 5V
3129 G28
1ms/DIV
PGOOD
2V/DIV
V
OUT
2V/DIV
V
IN
= 5V
OC
V
MPPC
SET TO 3.5V
C
IN
= 22µF, R
IN
= 10Ω,
V
OUT
= 5V, C
OUT
= 22µF
I
OUT
= 25mA to 125mA STEP
3129 G29
2ms/DIV
I
VOUT
100mA/DIV
V
OUT
2V/DIV
V
IN
2V/DIV
L = 10µH
V
IN
= 7V
V
OUT
= 5V
I
OUT
= 5mA
C
OUT
= 22µF
3129 G23
50µs/DIV
I
L
200mA/DIV
SW2
5V/DIV
SW1
5V/DIV