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LM3203 Folha de dados(PDF) 1 Page - Texas Instruments

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Nome de Peças LM3203
Descrição Electrónicos  Step-Down DC-DC Converter
Download  22 Pages
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

LM3203 Folha de dados(HTML) 1 Page - Texas Instruments

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LM3203
VIN
2.7V to 5.5V
VOUT
0.8V to 3.6V
L1
3.3 PH
C1
10 PF
C5
0.1 PF
C2
4.7 PF
VDD
PVIN
SW
FB
PGND
SGND
10 pF
267k
BYPOUT
R1
R2
133k
C3
BYP
VCON
EN
VCON
0.267V to 1.20V
LM3203
www.ti.com
SNVS355D – MAY 2005 – REVISED APRIL 2013
LM3203 Step-Down DC-DC Converter with Bypass Mode for CDMA / WCDMA RF Power
Amplifiers
Check for Samples: LM3203
1
FEATURES
DESCRIPTION
The LM3203 is a DC-DC converter optimized for
2
2MHz (Typ.) PWM Switching Frequency
powering RF power amplifiers (PAs) from a single
Operates from a Single Li-Ion Cell (2.7V to
Lithium-Ion cell. However, they may be used in many
5.5V)
other applications. It steps down an input voltage of
Adjustable Output Voltage (0.8V to 3.6V)
2.7V to 5.5V to an adjustable output voltage of 0.8V
to 3.6V. The output voltage is set using a VCON
500mA Maximum Load Capability (PWM and
analog
input
and
external
resistor
dividers
for
Bypass Mode)
optimizing efficiency of the RF PA at various power
PWM / Forced Bypass Mode
levels.
Low RDSON Bypass FET: 85mΩ (Typ.)
The LM3203 offers 3 modes for mobile phones and
High Efficiency (96% typ. at 3.6VIN, 3.2VOUT at
similar RF PA applications. Fixed-frequency PWM
150mA)
mode minimizes RF interference. Bypass mode turns
on an internal bypass switch to power the PA directly
Fast Turn-On Time When Enabled (50µs typ.),
from the battery. Shutdown mode turns the device off
3GPP Compliant
and reduces battery consumption to 0.1µA (typ.).
10-Pin DSBGA Package
The LM3203 is available in a 10-pin lead free DSBGA
Current Overload Protection
package. A high switching frequency (2MHz) allows
Thermal Overload Protection
use of tiny surface-mount components.
APPLICATIONS
Cellular Phones
Hand-Held Radios
RF PC Cards
Battery Powered RF Devices
TYPICAL APPLICATION
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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