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LM2619 Folha de dados(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças LM2619
Descrição Electrónicos  500mA Sub-Miniature Step-Down DC-DC Converter
Download  15 Pages
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2619 Folha de dados(HTML) 3 Page - National Semiconductor (TI)

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Connection Diagrams
10-Bump micro SMD Package
20057404
Top View
20057405
Bottom View
Ordering Information
Order Number
Package Type
NSC Package
Marking (*)
Supplied As
LM2619ATL
10-bump Wafer Level Chip Scale
(micro SMD)
XYTT S76A
250 Tape and Reel
LM2619ATLX
XYTT S76A
3000 Tape and Reel
(*) XY - denotes the date code marking (2 digit) in production
(*) TT - refers to die run/lot traceability for production
(*) S - product line designator
Package markings may change over the course of production.
Pin Description
Pin Number
Pin Name
Function
A1
FB
Feedback Analog Input.
B1
EANEG
Inverting input of error amplifier.
C1
EAOUT
Output of error amplifier.
D1
SYNC/MODE
Synchronization Input. Use this digital input for frequency selection or modulation control.
Set:
SYNC/MODE = high for low-noise 600kHz PWM mode
SYNC/MODE = low for low-current PFM mode
SYNC/MODE = a 500kHz–1MHz external clock for synchronization in PWM mode. (See
Synchronization and Operating Modes in the Device Information section.)
D2
EN
Enable Input. Set this Schmitt trigger digital input high for normal operation. For shutdown,
set low. Set EN low during system power-up and other low supply voltage conditions.
(See Shutdown Mode in the Device Information section.)
D3
PGND
Power Ground.
C3
SW
Switching Node connection to the internal PFET switch and NFET synchronous rectifier.
Connect to an inductor with a saturation current rating that exceeds the max Switch Peak
Current Limit of the LM2619.
B3
PVIN
Power Supply Voltage Input to the internal PFET switch. Connect to the input filter
capacitor.
A3
VDD
Analog Supply Input. If board layout is not optimum, an optional 0.1µF ceramic capacitor
is suggested.
A2
SGND
Analog and Control Ground.
www.national.com
3


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