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LM3203 Scheda tecnica(PDF) 2 Page - Texas Instruments

Il numero della parte LM3203
Spiegazioni elettronici  LM3203 Step-Down DC-DC Converter with Bypass Mode for CDMA / WCDMA RF Power Amplifiers
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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LM3203 Scheda tecnica(HTML) 2 Page - Texas Instruments

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A1
B1
C1
D1
A3
B3
C3
D3
SGND
A2
D2
EN
BYPOUT
PVIN
SW
PGND
VDD
FB
VCON
BYP
A3
B3
C3
D3
A1
B1
C1
D1
SGND
A2
D2
EN
BYPOUT
PVIN
SW
PGND
VDD
FB
VCON
BYP
LM3203
SNVS355D – MAY 2005 – REVISED APRIL 2013
www.ti.com
CONNECTION DIAGRAMS
Figure 1. Top View
Figure 2. Bottom View
10–Bump Thin DSBGA Package, Large Bump.
See NS Package Number YPA0010NHA.
PIN DESCRIPTION
Pin #
Name
Description
A1
VDD
Analog Supply Input. A 0.1 µF ceramic capacitor is recommended to be placed as close to this pin as
possible. (Figure 31)
B1
VCON
Voltage Control Analog input. VCON controls VOUT in PWM mode. (Refer to Setting the Output Voltage) Do not
leave floating.
C1
FB
Feedback Analog Input. Connect to the external resistor divider. (Figure 31)
D1
BYP
Bypass. Use this digital input to command operation in Bypass mode. Set BYP low for PWM operation.
D2
EN
Enable Input. Set this digital input high after Vin >2.7V for normal operation. For shutdown, set low.
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 maximum Switch Peak Current Limit
specification of the LM3203.
B3
PVIN
Power Supply Voltage Input to the internal PFET switch and Bypass FET. (Figure 31)
A3
BYPOUT
Bypass FET Drain. Connect to the output capacitor. (Figure 31) Connect this pin to VDD when Bypass mode is
NOT required. Do not leave floating.
A2
SGND
Analog and Control Ground
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: LM3203


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