LM2832YSD EVAL National Semiconductor, LM2832YSD EVAL Datasheet

BOARD EVAL LM2832YSD

LM2832YSD EVAL

Manufacturer Part Number
LM2832YSD EVAL
Description
BOARD EVAL LM2832YSD
Manufacturer
National Semiconductor
Datasheets
1.LM2832YSDNOPB.pdf (27 pages)
2.LM2832YMY_EVAL.pdf (6 pages)

Specifications of LM2832YSD EVAL

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
1.8V
Current - Output
2A
Voltage - Input
3 ~ 5.5V
Regulator Topology
Buck
Frequency - Switching
550kHz
Board Type
Fully Populated
Utilized Ic / Part
LM2832
Lead Free Status / RoHS Status
Not applicable / Not applicable
Power - Output
-
© 2009 National Semiconductor Corporation
LM2832Y 8-Pin eMSOP
Demo Board
Introduction
The demo board included in this shipment converts 3.6V to
5.5V input to 3.3V output for 2A load current using the
LM2832Y 550 kHz DC-DC switching converter. This is a 4-
layer board using the internal layers as a V
Ground plane.
A bill of materials below describes the parts used on this demo
board. A schematic and layout have also been included below
Pin-Out
Pin Description 8-Pin eMSOP
3, 5, 7
DAP
Pin
1
2
4
6
8
Die Attach Pad
Name
VIND
VINA
GND
SW
EN
FB
Function
Power Input supply.
Control circuitry supply voltage. Connect VINA to VIND on PC board.
Signal and power ground pin. Place the bottom resistor of the feedback network as close
as possible to this pin.
Enable control input. Logic high enables operation. Do not allow this pin to float or be
greater than VIN + 0.3V.
Feedback pin. Connect to external resistor divider to set output voltage.
Output switch. Connect to the inductor and catch diode.
Connect to system ground for low thermal impedance, but it cannot be used as a primary
GND connection.
LM2832Y 8-Pin eMSOP Demo Board Schematic
300012
IN
plane and
National Semiconductor
Application Note 1555
Matthew Reynolds
January 8, 2009
along with measured performance characteristics. The above
restrictions for the input voltage are valid only for the demo
board as shipped with the demo board schematic below.
Operating Conditions
V
V
I
O
IN
O
= 2A
= 3.3V
= 3.6V to 5.5V
30001202
www.national.com
30001201

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LM2832YSD EVAL Summary of contents

Page 1

... DAP Die Attach Pad © 2009 National Semiconductor Corporation National Semiconductor Application Note 1555 Matthew Reynolds January 8, 2009 along with measured performance characteristics. The above restrictions for the input voltage are valid only for the demo board as shipped with the demo board schematic below. ...

Page 2

LM2832 Gain/Phase LM2832 Efficiency: η vs Load "X" Vin = 5V 1.8V & 3.3V www.national.com 30001203 30001205 2 30001204 ...

Page 3

Part Buck Regulator C1, Input Cap C2 Output Cap C3 Output Cap D1, Catch Diode 0. – R9 Layout Bill Of Materials LM2832Y-Version Part Value Manufacturer NSC 22 µF, 6.3V, X5R ...

Page 4

Internal Plane 1 (GND) Internal Plane 30001207 30001208 ...

Page 5

Bottom Layer 5 30001209 www.national.com ...

Page 6

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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