88PG8227A1-NFE1C000 Marvell, 88PG8227A1-NFE1C000 Datasheet - Page 37

• Manufacturer Part Number: 88PG8227A1-NFE1C000
• Description: MVL88PG8227A1-NFE1C000 1 MHZ DUAL STEP D
• Manufacturer: Marvell

V
V
V
V
BUCK
BUCK
POR
POR
SDI
SDI
4.5
4.5.1
Copyright © 2008 Marvell
April 23, 2008, 2.00
V
C
V
C
Figure 38: V
Figure 40: V
IN
IN
OUT
OUT
= 5.0V
= 5.0V
= (2 x 22) + 1000 μF
= (2 x 22) + 1000 μF
No Load
I
LOAD
OUT
OUT
Output Voltage Transient Waveforms
The following graphs show the effect of changing the step-down regulator’s output voltage using the
serial interface. Depending on the change in the step-size of the output voltage, the output load, and
the output capacitance, the power-on reset pin de-asserts when the changes of the output voltage
occur beyond the 25 μs (typical) delay.
Step-Down Regulator
100
100
= 1.0V to 1.2V with
= 1.0V to 1.2V with
= 1.5A
μ
μ
s/DIV
s/DIV
Document Classification: Proprietary Information
500 mV/DIV
5V/DIV
5V/DIV
500 mV/DIV
5V/DIV
5V/DIV
V
V
V
V
BUCK
BUCK
POR
SDI
POR
SDI
V
C
V
C
IN
OUT
Figure 39: V
Figure 41: V
IN
OUT
= 5.0V
= 5.0V
= (2 x 22) +1000 μF
= (2 x 22) +1000 μF
Output Voltage Transient Waveforms
No Load
I
LOAD
OUT
OUT
100
100
Functional Characteristics
= 1.0V to 1.5V with
= 1.0V to 1.5V with
= 1.5A
μ
μ
s/DIV
s/DIV
Doc. No. MV-S103563-00 Rev. C
Page 37
500 mV/DIV
5V/DIV
5V/DIV
500 mV/DIV
5V/DIV
5V/DIV