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Document Number: MC34704
Rev. 8.0, 12/2014
Freescale Semiconductor
Technical Data
© Freescale Semiconductor, Inc., 2008 - 2014. 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 5.5
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. This device is powered by SMARTMOS technology.
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
•I
2
C programmability
• Output undervoltage and overvoltage detection for each regulator
• Overcurrent 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
Figure 1. 34704 Simplified Application Diagram
MULTI-CHANNEL IC
34704
ORDERING INFORMATION
Device
Temperature
Range (T
A
)
Package
MC34704AEP/R2
-20 °C to 85 °C 56 QFN EP
MC34704BEP/R2
EP SUFFIX (PB-FREE)
98ASA00712D
56-PIN QFN
MPU
DDR
MEMORY
V
CORE
V
IO1
V
IO2
V
DDR
V
BKL
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
I
2
C COMM
GND
GND
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 4 Seite 5 Seite 6 Seite 7 Seite 17
- ・ Abmessungen des Paketumrisses on Seite 50 Seite 51 Seite 52
- ・ Teilenummerierungssystem on Seite 1
- ・ Blockdiagramm on Seite 3 Seite 20
- ・ Typisches Anwendungsschaltbild on Seite 29 Seite 48 Seite 49
- ・ Beschreibung der Funktionen on Seite 16 Seite 17 Seite 18 Seite 19 Seite 20
- ・ Technische Daten on Seite 1
- ・ Anwendungsbereich on Seite 48 Seite 49
- ・ Elektrische Spezifikation on Seite 8 Seite 9 Seite 10 Seite 11 Seite 12
