LM3678SD-1.2EV National Semiconductor, LM3678SD-1.2EV Datasheet

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LM3678SD-1.2EV

Manufacturer Part Number
LM3678SD-1.2EV
Description
BOARD EVAL FOR LM3678SD-1.2
Manufacturer
National Semiconductor
Series
PowerWise®r
Datasheets

Specifications of LM3678SD-1.2EV

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
0.8V or 1.2V
Current - Output
1.5A
Voltage - Input
2.5 ~ 5.5V
Regulator Topology
Buck
Frequency - Switching
3.3MHz
Board Type
Fully Populated
Utilized Ic / Part
LM3678
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-
© 2008 National Semiconductor Corporation
LM3678 Evaluation Board
Introduction
The LM3678 evaluation board is a working demonstration of
a synchronous buck DC-DC converter. This application note
contains information about the evaluation board. For more
details and electrical characteristics about the converter op-
eration, please refer to the LM3678 datasheet.
Typical Application
300387
FIGURE 1. Typical Application Circuit
National Semiconductor
Application Note 1722
Anne Lu
October 14, 2008
Operating Range
Package
LLP-10 no-pullback (3mm x 3mm x 0.8mm)
V
Recommended load current: up to 1.5A
V
IN
OUT
range: 2.5V to 5.5V
= 0.8/1.2V
30038701
www.national.com

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LM3678SD-1.2EV Summary of contents

Page 1

... DC-DC converter. This application note contains information about the evaluation board. For more details and electrical characteristics about the converter op- eration, please refer to the LM3678 datasheet. Typical Application © 2008 National Semiconductor Corporation National Semiconductor Application Note 1722 Anne Lu October 14, 2008 Operating Range • ...

Page 2

Connection Diagrams Top View Note: the above figures are not to any actual scale Pin Descriptions Pin# Name Description 1 GND Ground 2 GND 3 SW Switching node connection to the internal PFET switch and NFET synchronous rectifier. 4 VDD ...

Page 3

Powering the LM3678 for Bench Measurements When powering the LM3678 with a bench power supply recommended to place a 100µF tantalum capacitor across the VIN and GND supply terminals of the bench power supply. This capacitor will reduce ...

Page 4

... BOM for LM3678 Component Name Manufacturer LM3678SD C1 = 10µF Taiyo-Yuden C2 = 22µF Inductor Taiyo-Yuden R1 Vishay/any manufacturer V , Mode & EN SEL V , Mode & EN SEL V banana jack - red IN V banana jack - yellow OUT GND banana jack - black www.national.com Bottom Layer BOM Specification NSC LLP-10 ...

Page 5

Notes 5 www.national.com ...

Page 6

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