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LM3208 データシート(PDF) 1 Page - Texas Instruments

部品番号 LM3208
部品情報  LM3208 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

LM3208 データシート(HTML) 1 Page - Texas Instruments

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FB
EN
VDD
PVIN
VCON
SW
VIN
2.7V to 5.5V
VOUT
0.8V to 3.6V
10 PF
4.7 PF
SGND
PGND
3.3 PH
LM3208
VOUT = 2.5 x VCON
LM3208
www.ti.com
SNVS404B – APRIL 2006 – REVISED MARCH 2013
LM3208 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power
Amplifiers
Check for Samples: LM3208
1
FEATURES
DESCRIPTION
The LM3208 is a DC-DC converter optimized for
2
2 MHz (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, it may be used in many
5.5V)
other applications. It steps down an input voltage in
Adjustable Output Voltage (0.8V to 3.6V)
the range from 2.7V to 5.5V to an adjustable output
voltage of 0.8V to 3.6V. Output voltage is set by
Fast Output Voltage Transient (0.8V to 3.4V in
using a VCON analog input to control power levels and
25µs typ.)
efficiency of the RF PA.
650mA Maximum Load Capability
The LM3208 offers superior performance for mobile
High Efficiency (95% typ. at 3.9VIN, 3.4VOUT at
phones and similar RF PA applications. Fixed-
400mA)
frequency PWM operation minimizes RF interference.
8-pin DSBGA Package
A shutdown function turns the device off and reduces
battery consumption to 0.01 µA (typ.).
Current Overload Protection
Thermal Overload Protection
The LM3208 is available in an 8-pin lead-free DSBGA
package. A high switching frequency (2 MHz typ.)
allows use of tiny surface-mount components. Only
APPLICATIONS
three small external surface-mount components, an
Cellular Phones
inductor and two ceramic capacitors, are required.
Hand-Held Radios
RF PC Cards
Battery Powered RF Devices
TYPICAL APPLICATION
Figure 1. LM3208 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 © 2006–2013, 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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