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What is 34712?

This electronic component, produced by the manufacturer "Freescale Semiconductor", performs the same function as "DDR Switch-Mode Power Supply".


34712 Datasheet PDF - Freescale Semiconductor

Part Number 34712
Description DDR Switch-Mode Power Supply
Manufacturers Freescale Semiconductor 
Logo Freescale Semiconductor Logo 


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Freescale Semiconductor
Advance Information
3.0 A 1.0 MHz Fully Integrated
DDR Switch-Mode Power
Supply
Document number: MC34712
Rev. 4.0, 5/2007
34712
The 34712 is a highly integrated, space efficient, low cost, single
synchronous buck switching regulator with integrated N-channel
power MOSFETs. It is a high performance point-of-load (PoL) power
supply with the ability to track an external reference voltage.
Its high efficient 3.0 A sink and source capability combined with its
voltage tracking/sequencing ability and tight output regulation, makes
it ideal to provide the termination voltage (VTT) for modern data buses
such as Double-Data-Rate (DDR) memory buses. It also provides a
buffered output reference voltage (VREF) to the memory chipset
The 34712 offers the designer the flexibility of many control,
supervisory, and protection functions to allow for easy implementation
of complex designs. It is housed in a Pb-Free, thermally enhanced,
and space efficient 24-Pin Exposed Pad QFN.
Features
www.DataSheet4U.com
• 45 mIntegrated N-Channel Power MOSFETs
• Input Voltage Operating Range from 3.0 V to 6.0 V
±1 % Accurate Output Voltage, Ranging from 0.7 V to 1.35 V
±1 % Accurate Buffered Reference Output Voltage
• Programmable Switching Frequency Range from 200 kHz to
1.0 MHz with a default of 1.0 MHz
• Over Current Limit and Short Circuit Protection
• Thermal Shutdown
• Output Overvoltage and Undervoltage Detection
• Active Low Power Good Output Signal
• Active Low Standby and Shutdown Inputs
• Pb-Free Packaging Designated by Suffix Code EP.
VIN
(3.0V TO 6.0V)
VDDQ
34712
PVIN
BOOT
VREFIN
SW
SWITCH-MODE POWER SUPPLY
EP SUFFIX
98ARL10577D
24-PIN QFN
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC34712EP/R2
-40 to 85°C
24 QFN
TERMINATING
VTT RESISTORS
VIN VOUT
MCU
VDDI
INV
FREQ
GND
COMP
VREFOUT
SD PGND
STBY
PG
VIN
VDDQ
MEMORY
BUS
DDR MEMORY
CHIPSET
VREF
VDDQ
DDR MEMORY
CONTROLER
Figure 1. 34712 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.

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34712 equivalent
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
Table 2. Maximum Ratings
All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or
permanent damage to the device.
Ratings
Symbol
Value
Unit
ELECTRICAL RATINGS
Input Supply Voltage (VIN) Pin
High-Side MOSFET Drain Voltage (PVIN) Pin
Switching Node (SW) Pin
BOOT Pin (Referenced to SW Pin)
PG, VOUT, SD, and STBY Pins
VIN
PVIN
VSW
VBOOT - VSW
-
-0.3 to 7.0
-0.3 to 7.0
-0.3 to 7.5
-0.3 to 7.5
-0.3 to 7.0
V
V
V
V
V
VDDI, FREQ, INV, COMP, VREFIN, and VREFOUT Pins
Continuous Output Current (1)
ESD Voltage (2)
Human Body Model
Device Charge Model (CDM)
THERMAL RATINGS
Operating Ambient Temperature (3)
Storage Temperature
Peak Package Reflow Temperature During Reflow (4), (5)
Maximum Junction Temperature
Power Dissipation (TA = 85 °C) (6)
-
IOUT
VESD1
VESD3
TA
TSTG
TPPRT
TJ(MAX)
PD
-0.3 to 3.0
±3.0
±2000
±750
-40 to 85
-65 to +150
Note 5
+150
2.9
V
A
V
°C
°C
°C
°C
W
Notes
1. Continuous output current capability so long as TJ is TJ(MAX).
2. ESD1 testing is performed in accordance with the Human Body Model (CZAP=100 pF, RZAP=1500 ), ESD3 testing is performed in
accordance with the Charge Device Model (CDM).
3. The limiting factor is junction temperature, taking into account power dissipation, thermal resistance, and heatsinking.
4. Pin soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may
cause malfunction or permanent damage to the device.
5. Freescale’s Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020C. For Peak Package Reflow
Temperature and Moisture Sensitivity Levels (MSL),
Go to www.freescale.com, search by part number [e.g. remove prefixes/suffixes and enter the core ID to view all orderable parts. (i.e.
MC33xxxD enter 33xxx), and review parametrics.
6. Maximum power dissipation at indicated ambient temperature.
Analog Integrated Circuit Device Data
Freescale Semiconductor
34712
5


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