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MC34704 Fiches technique(PDF) 1 Page - Freescale Semiconductor, Inc

No de pièce MC34704
Description  Multiple Channel DC-DC Power Management IC
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Fabricant  FREESCALE [Freescale Semiconductor, Inc]
Site Internet  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

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Document Number: MC34704
Rev. 3, 7/2008
Freescale Semiconductor
Advance Information
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2008. All rights reserved.
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.
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
•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
• 5.0µA 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
Figure 1. 34704 Simplified Application Diagram
MULTI-CHANNEL IC
34704
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC34704AEP/R2
-20°C to 85°C
56 QFN EP
MC34704BEP/R2
EP SUFFIX (PB-FREE)
98ASA10751D
56-PIN QFN
MPU
DDR
MEMORY
VCORE
VIO1
VIO2
VDDR
VBKL
LCD
+5V
VREF+ (5 to 16V)
VREF- (-5 to -9V)
34704A/B
* Available only in 34704A device
REG 8
REG 4
REG 3
REG 2
REG 5
*REG 1
*REG 6
*REG 7
PGND
I2C COMM
GND
GND


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