Freescale Semiconductor
Technical Data
Document Number: MC34704
Rev. 4.0, 6/2009
Multiple Channel DC-DC Power
Management IC
The 34704 is a multi-channel Power Management IC (PMIC) used
to address power management needs for various multimedia
application microprocessors. Its ability to provide either 5 or 8
independent output voltages with a single input power supply (2.7
and 5.5V) together with its high efficiency, make it ideal for portable
devices powered up by Li-Ion/polymer batteries or for USB powered
devices as well.
The 34704 is housed in a 7x7mm, Pb-free, QFN56 and is capable
of operating at a switching frequency of up to 2MHz. This makes it
possible to reduce external component size and to implement full
space efficient power management solutions.
34704
MULTI-CHANNEL IC
Features
• 8 DC/DC (34704A) or 5 DC/DC (34704B) switching regulators with
up to
±2%
output voltage accuracy
• Dynamic voltage scaling on all regulators.
• Selectable voltage mode control or current mode control on REG8
• I
2
C programmability
• Output under-voltage and over-voltage detection for each
regulator
• Over-current limit detection and short-circuit protection for each
regulator
• Thermal limit detection for each regulator, except REG7
• Integrated compensation for REG1, REG3, REG6, and REG8
• 5.0µA maximum shutdown current (All regulators are off, 5.5V VIN)
• True cutoff on all of the boost and buck-boost regulators
• Pb-free packaging designated by suffix code EP
EP SUFFIX (PB-FREE)
98ASA10751D
56-PIN QFN
ORDERING INFORMATION
Device
MC34704AEP/R2
MC34704BEP/R2
Temperature
Range (T
A
)
-20°C to 85°C
Package
56 QFN EP
34704A/B
REG 8
REG 4
V
BKL
V
DDR
I
2
C COMM
REG 3
REG 2
REG 5
PGND
*REG 1
*REG 6
*REG 7
V
CORE
V
IO1
V
IO2
DDR
MEMORY
GND
MPU
GND
LCD
+5V
VREF+ (5 to 16V)
VREF- (-5 to -9V)
* Available only in 34704A device
Figure 1. 34704 Simplified Application Diagram
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,
as may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2008 - 2009. All rights reserved.
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
