http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf



Freescale Semiconductor Electronic Components Datasheet



MC34712

Fully Integrated DDR Switch-Mode Power Supply



No Preview Available !

MC34712 pdf
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.



No Preview Available !

MC34712 pdf
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
STBY SD
Thermal
Monitoring
PG System
M1
Ise nse
Reset
Current I limit
Monitoring Discharge
FREQ
O scillato r
Prog. Frequency
System
Control
I nte rn a l
Voltage
Regulator
VDDI
M2
VIN
BOO T
VIN VBOOT
PV IN
Buck
Cntl.
FS W
Gate
M3
Logic
Driver Isense
SW
VDDI
VREFIN
V DDI
Bandgap
Reg ulat or
VBG
RREF1
Buffer
RREF2
M6
Discharge
Ramp
Generator
PWM
Comparator
M4
PG ND
E rr or
A mp lif ier
COMP
I NV
M5
Discharge
VOUT
GND VREFOUT
Figure 2. 34712 Simplified Internal Block Diagram
34712
2
Analog Integrated Circuit Device Data
Freescale Semiconductor



Part Number MC34712
Description Fully Integrated DDR Switch-Mode Power Supply
Maker Freescale Semiconductor - Freescale Semiconductor
Total Page 23 Pages
PDF Download
MC34712 pdf
Download PDF File
MC34712 pdf
View for Mobile




Featured Datasheets

Part Number Description Manufacturers PDF
MC34701 1.5 A Switch-Mode Power Supply with Linear Regulator MC34701
Freescale Semiconductor
PDF
MC34702 Switch-Mode Power Supply MC34702
Freescale Semiconductor
PDF
MC34703 Switch-Mode Power Supply MC34703
Freescale Semiconductor
PDF
MC34708 Power Management Integrated Circuit MC34708
Freescale Semiconductor
PDF
MC34710 Adjustable Dual Output Switching Power Supply MC34710
Motorola
PDF
MC34712 Fully Integrated DDR Switch-Mode Power Supply MC34712
Freescale Semiconductor
PDF


Part Number Start With

0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

site map

webmaste! click here

contact us

Buy Components