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LM3281 Arkusz danych(PDF) 3 Page - Texas Instruments

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Numer części LM3281
Szczegółowy opis  3.3-V, 1.2-A, 6-MHz Miniature Step-Down DC-DC Converter
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
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LM3281 Arkusz danych(HTML) 3 Page - Texas Instruments

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GND
C2
C1
EN
MODE
B1
B2
SW
A1
FB
A2
LM3281
VIN
EN
MODE
GND
SW
VIN
FB
A
B
C
1
2
LM3281
www.ti.com
SNVSA38 – NOVEMBER 2014
5 Pin Configuration and Functions
DSBGA (YFQ)
6 Pins
Top
Figure 1. Pin Out
Pin Functions
PIN
TYPE
DESCRIPTION
NO.
NAME
Connect to the output at the output filter capacitor COUT by lowest inductance path with a
A1
FB
Power
trace rated for 2 A.
Connect to input filter capacitor CIN by lowest inductance path, then connect to supply
A2
VIN
Power
voltage with a trace rated for 2 A.
Selects automatic ECO/PWM mode or forced PWM mode. When MODE is HIGH the
B1
MODE
Logic
LM3281 automatically transitions between PWM and ECO operation. When MODE is LOW
the LM3281 operates in PWM mode only. Do not leave MODE pin floating.
B2
SW
Power
Connect to inductor LSW with a trace rated for 2 A.
Set this digital input logic high for normal operation. For shutdown, set to logic low. Do not
C1
EN
Logic
leave EN pin floating.
Connect to input filter capacitor CIN by lowest inductance path, then to system ground by a
C2
GND
Ground
very low inductance path.
Copyright © 2014, Texas Instruments Incorporated
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