88PG8226A1-NFE1C000 Marvell, 88PG8226A1-NFE1C000 Datasheet - Page 31

• Manufacturer Part Number: 88PG8226A1-NFE1C000
• Manufacturer: Marvell

V
V
V
BUCK1
BUCK2
V
V
EN
V
V
BUCK1
BUCK2
POR1
POR2
V
4
4.1
Copyright © 2008 Marvell
April 23, 2008, 2.00
IN
V
V
V
V
V
IN
BUCK1
BUCK2
IN
BUCK1
Figure 16: Startup Using the Enable
= 5.0V
= 5.0V
Figure 18: Startup Sequence
= 1.2V
= 1.2V
= 1.2V
Pin
Functional Characteristics
The following applies unless otherwise noted: T
(BUCK1)
Start-Up Waveforms
NOTE:
1 ms/DIV
10 ms/DIV
= 22 µF (ceramic), C
When the input voltage rises above the UVLO’s upper threshold, there is a delay (4 ms typ) before the
step-down regulator’s output voltage turns on.
I
t
SDI = 0V
V
I
SDI = 0V
LOAD
DLY
LOAD
BUCK2
= 4.0 ms
= No Load
= No Load
= 1.2V
Document Classification: Proprietary Information
OUT (BUCK2)
2V/DIV
1V/DIV
1V/DIV
= 22 µF (ceramic).
5V/DIV
2V/DIV
2V/DIV
5V/DIV
5V/DIV
A
= 25°C, R
V
V
BUCK1
BUCK2
V
V
V
V
BUCK1
BUCK2
V
SVIN
POR1
POR2
EN
V
IN
V
V
V
V
V
= 10Ω, C
IN
BUCK1
IN
BUCK1
BUCK2
Figure 17: Turn Off Using the
= 5.0V
= 5.0V
Figure 19: Hot Plug
= 1.2V
= 1.2V
= 1.2V
SVIN
= 0.1 µF, C
Enable Pin
1
Functional Characteristics
PVIN
10
m
s/DIV
m
= 2 x 22 µF, L1 = L2 = 3.3 µH, C
s/DIV
Doc. No. MV-S103563-00 Rev. C
V
I
SDI = 0V
I
LOAD
LOAD
BUCK2
Start-Up Waveforms
= No Load
= 50 mA
= 1.2V
Page 31
OUT
5V/DIV
2V/DIV
2V/DIV
5V/DIV
5V/DIV
2V/DIV
1V/DIV
1V/DIV