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LM3243 Datasheet(PDF) 2 Page - Texas Instruments

No. de pieza LM3243
Descripción Electrónicos  High-Current Step-Down Converter for 2G/3G/4G RF Power Amplifiers
Download  29 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM3243 Datasheet(HTML) 2 Page - Texas Instruments

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4
3
2
1
Top View
4
3
2
1
Bottom View
A
B
C
D
A
B
C
D
ACB
ACB
BGND
FB
ACB
ACB
BGND
FB
PVIN
PVIN
BP
MODE
PVIN
PVIN
BP
MODE
SW
SW
EN
VCON
SW
SW
EN
VCON
PGND
PGND
SGND
VDD
PGND
PGND
SGND
VDD
LM3243
SNVS782B – OCTOBER 2010 – REVISED FEBRUARY 2013
www.ti.com
Connection Diagram
16-Bump 0.4 mm Pitch Thin DSBGA Package
PIN DESCRIPTIONS
Pin #
Name
Description
A1
PGND
Power Ground to the internal NFET switch.
B1
C1
SGND
Signal Analog and Control Ground (Low Current)
D1
VDD
Analog Supply Input.
A2
Switching Node connection to the internal PFET switch and NFET synchronous rectifier. Connect
SW
to an inductor with a saturation current rating that exceeds the ILIM,PFET,Steady State Current Limit
B2
specification of the LM3243.
Enable Input. Set this digital input HIGH for normal operation. For shutdown, set low. Pin has an
C2
EN
800 k
Ω internal pulldown resistor.
D2
VCON
Voltage Control Analog input. VOUT = 2.5 x VCON.
A3
PVIN
Power Supply Voltage Input to the internal PFET switch and ACB.
B3
Bypass mode Input. Set the pin HIGH for forced Bypass mode operation. Set the pin LOW for
C3
BP
automatic Analog Bypass mode (recommended).
PWM/PFM Mode Selection Input. Setting the pin HIGH allows for PFM or PWM, depending on
D3
MODE
the load current. Setting the pin LOW forces the part to be in PWM only.
A4
ACB
Analog Current Bypass. Connect to the output at the output filter capacitor.
B4
C4
BGND
Active Current assist and analog Bypass Ground (High Current).
D4
FB
Feedback Analog Input. Connect to the output at the output filter capacitor.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
2
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Product Folder Links: LM3243


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