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34716 の電気的特性と機能

34716のメーカーはFreescale Semiconductorです、この部品の機能は「Dual Switch-Mode DDR Power Supply」です。


製品の詳細 ( Datasheet PDF )

部品番号 34716
部品説明 Dual Switch-Mode DDR Power Supply
メーカ Freescale Semiconductor
ロゴ Freescale Semiconductor ロゴ 




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34716 Datasheet, 34716 PDF,ピン配置, 機能
Freescale Semiconductor
Advance Information
Document Number: MC34716
Rev. 3.0, 5/2007
1.0 MHz Dual Switch-Mode DDR
Power Supply
34716
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
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±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.
DUAL SWITCH-MODE DDR POWER
SUPPLY
EP SUFFIX
98ASA10728D
26-PIN QFN
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC34716EP/R2
-40 to 85°C
26 QFN
3.0V to 6.0V VIN
VDDQ
34716
VIN
PVIN1
BOOT1
SW1
VOUT1
PVIN2
VREFIN
BOOT2
SW2
VOUT2
INV1 INV2
COMP1
PGND1
VDDI
COMP2
VREFOUT
PGND2
VDDQ
VTT
VDDQ
Termination
Resistors
DDR Memory
Chipset
Memory Bus
VIN VREF
DDR Memory
Controller
FREQ
ILIM1
GND
PG
STBY
SD
MCU
Figure 1. 34716 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.

1 Page





34716 pdf, ピン配列
PIN CONNECTIONS
PIN CONNECTIONS
26 25 24 23 22 21 20 19
BOOT1 1
PVIN1
2
PVIN1
SW1
3
SW1
PGND1
4
PGND1
VOUT1 5
Transparent
Top View
18 BOOT2
PVIN2
17
PVIN2
SW2
16
SW2
PGND2
15
PGND2
14 VOUT2
6 7 8 9 10 11 12 13
Figure 3. 34716 Pin Connections
Table 1. 34716 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 11.
Pin Number Pin Name Pin Function Formal Name
Definition
1
BOOT1
Passive
Bootstrap
Channel 1 Bootstrap capacitor input pin
2
PVIN1
Supply Power Input Voltage Channel 1 Buck converter power input
3
SW1
Input/Output Switching Node Channel 1 Buck converter switching node
4
PGND1
Ground
Power Ground
Channel 1 Buck converter and discharge MOSFETs power ground
5
VOUT1
Input
Output Voltage
Channel 1 Buck converter output voltage discharge pin
Discharge Path
6
INV1
Input
Error Amplifier
Channel 1 Buck converter error amplifier inverting input
Inverting Input
7
COMP1
Input
Buck Convertor Channel 1 Buck converter external compensation network input
Compensation Input
8
VREFIN
Input
Reference Voltage Voltage tracking reference voltage input
Input
9
VREFOUT
Output
Reference Voltage This is a buffered reference voltage output
Output
10
PG
Output
Power Good Output It is an active low open drain power good status reporting output
Signal
11
SD
Input
Shutdown Input Shutdown mode input control pin
12
COMP2
Input
Buck Convertor Channel 2 Buck converter external compensation network input
Compensation Input
13
INV2
Input
Error Amplifier
Channel 2 Buck converter error amplifier inverting input
Inverting Input
Analog Integrated Circuit Device Data
Freescale Semiconductor
34716
3


3Pages


34716 電子部品, 半導体
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
Table 2. Maximum Ratings (continued)
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
THERMAL RESISTANCE (8)
Thermal Resistance, Junction to Ambient, Single-Layer Board (1s) (9)
Thermal Resistance, Junction to Ambient, Four-Layer Board (2s2p) (10)
Thermal Resistance, Junction to Board (11)
RθJA
RθJMA
RQJB
93
32
13.6
°C/W
°C/W
°C/W
Notes
8. The PVIN, SW, and PGND pins comprise the main heat conduction paths.
9. Per SEMI G38-87 and JEDEC JESD51-2 with the single-layer board (JESD51-3) horizontal.
10. Per JEDEC JESD51-6 with the board (JESD51-7) horizontal. There are thermal vias connecting the package to the two planes in the
board. (per JESD51-5)
11. Thermal resistance between the device and the printed circuit board per JEDEC JESD51-8. Board temperature is measured on the top
surface of the board near the package.
34716
6
Analog Integrated Circuit Device Data
Freescale Semiconductor

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