88PG82XX
Field Programmable DSP Switcher™ Family
Datasheet
PRODUCT OVERVIEW
The 88PG82XX family integrates the dual synchronous
Step-Down (Buck) switching regulators housed in a 3 X
4mm QFN-20 package. Internally self-compensated, the
step-down regulator requires no external compensation
and works with low-ESR output capacitors to simplify the
design, minimize the board space, and reduce the
amount of external components. The switching
frequency for the step-down regulator is 1MHz, allowing
the use of low profile surface mount inductors and low
value capacitors. Each step-down regulator includes
programmable output voltage to allow the user to easily
set the output voltage with external resistors, logic
control, or serial data interface. The output voltage range
is 0.72V to 3.63V.
The 88PG82XX family operates from an input voltage
range of 2.75V to 5.5V, making the device well suited for
portable applications.
Other key features of the 88PG82XX family include soft
start, an internal current limit, an under-voltage lockout,
thermal shutdown, over voltage protection, and
power-on-reset signals.
Dual switching regulators
1MHz switching frequency
Low quiescent current of 2.1 mA (typ.)
Stable with low-ESR ceramic output capacitors
No external compensation required
Up to 95% efficiency
Input voltage range: 2.75V to 5.5V
Programmable output voltage range: 0.72V to 3.63V
Serial / Logic Programmability
Any Voltage
TM
Technology provides 64 output voltage
selections to provide up most flexibility
Built-in undervoltage lockout
Over voltage protection
Thermal shutdown protection
Output short circuit protection
Output voltage margining capability
Lead-free packages
Applications
Portable and handheld computing
Point-of-load power supplies
DSP power supplies
Disk drive power supplies
Features
Tiny 3 X 4 mm QFN-20 package
Figure 1: Typical Application Circuit: Output 1.8V/1.5A and 1.2V/1.5A
R1
C1
0.1uF
R4
100k
R3
100k
R2
100k
4
11
16
6
1
13
12
14
15
R7
160k
R8
0
R5
51k
R6
0
10 ohm
3
SVIN
SGND
POR1
POR2
SDI
PGND1
EN
SW2
VSET1
SW2
PSET1
VSET2
PSET2
SFB2
PGND2
2
22uF/6.3V
19
17
PVIN2
10
PVIN1
SW1
SW1
7
L1
9
3.3uH
5
22uF/6.3V
8
18
L2
20
3.3uH
C4
C3
C2
22uF/6.3V
C5
Vin
2.75V - 5.5V
22uF/6.3V
POR 1
POR 2
SDI
EN
Vout1
2.5V/1.5A
88PG8226
SFB1
Vout2
1.5V/1.5A
Copyright © 2008 Marvell
April 23, 2008, 2.00
Document Classification: Proprietary Information
Doc. No. MV-S103563-00 Rev. C
Page 3
MARVELL [ MARVELL TECHNOLOGY GROUP LTD. ]
