34704_11 Datasheet, PDF (1/54 Pages) Freescale Semiconductor, Inc – Multiple Channel DC-DC Power Management IC

Freescale Semiconductor
Technical Data
Multiple Channel DC-DC Power
Management IC
Document Number: MC34704
Rev. 5.0, 2/2011
34704
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.
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 output voltage or current regulation on REG8
• I²C 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
• 5.0 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
MULTI-CHANNEL IC
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
REG 3
REG 2
REG 5
PGND
*REG 1
*REG 6
*REG 7
V_BKL
V_DDR
DDR
I²C COMM ^MEMORY
GND
V_CORE
V_IO1
V_IO2
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.