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MC34716EP Scheda tecnica(PDF) 1 Page - Freescale Semiconductor, Inc

Il numero della parte MC34716EP
Spiegazioni elettronici  1.0 MHz Dual Switch-Mode DDR Power Supply
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Produttore elettronici  FREESCALE [Freescale Semiconductor, Inc]
Homepage  http://www.freescale.com
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MC34716EP Scheda tecnica(HTML) 1 Page - Freescale Semiconductor, Inc

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Document Number: MC34716
Rev. 3.0, 5/2007
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., 2007. All rights reserved.
1.0 MHz Dual Switch-Mode DDR
Power Supply
The 34716 is a highly integrated, space-efficient, low cost, dual
synchronous buck switching regulator with integrated N-channel
power MOSFETs. It is a high performance point-of-load (PoL) power
supply with its second output having the ability to track an external
reference voltage. it provides a full power supply solution for Double-
Data-Rate (DDR) Memories.
Channel one provides a source only 5.0 A drive capability, while
channel two can sink and source up to 3.0 A. Both channels are highly
efficient with tight output regulation. With its high current drive
capability, channel one can be used to supply the VDDQ to the
memory chipset. The second channel’s ability to track a reference
voltage makes it ideal to provide the termination voltage (VTT) for
modern data buses. The 34716 also provides a buffered output
reference voltage (VREFOUT) to the memory chipset
The 34716 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 26-Pin Exposed Pad QFN.
Features
•50 mIntegrated N-Channel Power MOSFETs
• Input Voltage Operating Range from 3.0 V to 6.0 V
±1 % Accurate Output Voltages, Ranging from 0.7 V to 3.6 V
• The second output Tracks 1/2 an External Reference Voltage
±1 % Accurate Buffered Reference Output Voltage
• Programmable Switching Frequency Range from 200 kHz to
1.0 MHz
• Programmable Soft Start Timing for Channel One
• Over Current Limit and Short Circuit Protection on Both Channels
• 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.
Figure 1. 34716 Simplified Application Diagram
DUAL SWITCH-MODE DDR POWER
SUPPLY
EP SUFFIX
98ASA10728D
26-PIN QFN
34716
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC34716EP/R2
-40 to 85°C
26 QFN
VIN
PVIN1
3.0V to 6.0V
BOOT1
SW1
COMP1
VOUT1
VREFOUT
GND
VREFIN
VDDI
FREQ
PG
STBY
SD
34716
MCU
DDR Memory
Controller
DDR Memory
Chipset
VIN
Memory Bus
Termination
VTT
VDDQ
VDDQ
VREF
PGND1
PVIN2
BOOT2
SW2
INV2
COMP2
VOUT2
PGND2
VDDQ
ILIM1
INV1
Resistors
VIN


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