Freescale Semiconductor
Technical Data
Document Number: MC34704
Rev. 5.0, 2/2011
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 5.5 V) 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 7x7 mm, Pb-free, QFN56 and is capable
of operating at a switching frequency of up to 2.0 MHz. 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.
ORDERING INFORMATION
• Selectable output voltage or current regulation on REG8
Temperature
• I
2
C programmability
Device
Package
Range (T
A
)
• Output under-voltage and over-voltage detection for each
MC34704AEP/R2
regulator
-20°C to 85°C
56 QFN EP
MC34704BEP/R2
• 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
• 5.0 µA maximum shutdown current (All regulators are off, 5.5 V 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
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 - 2011. All rights reserved.
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
