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LM3248TMENOPB 数据表(PDF) 1 Page - Texas Instruments

部件名 LM3248TMENOPB
功能描述  LM3248 2.7 MHz, 2.5A Adjustable Boost-Buck DC/DC Converter
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM3248TMENOPB 数据表(HTML) 1 Page - Texas Instruments

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Apps
Processor
VCC_PA
1.8V Logic
FB_
BUCK
BOOST
BUCK
SW_
BUCK
PVIN_
BUCK
OUT_
BOOST
SW_
BOOST
SGND_
BOOST
BYPASS
CONTROL
ENABLE
BOOST_
GATE
MODE
PVIN_
BOOST
DGND
ACB
SGND_
BUCK
VDD_
BOOST
VDD1_
BUCK
VCON
VDD2_
BUCK
1.5 H
1.0 H
10 F
10 F
10 F
1 F Low ESL
VBATT
2.7V to 5.5V
FB
1 nF
ACB
LM3248
www.ti.com
SNVSA01A – JULY 2013 – REVISED SEPTEMBER 2013
LM3248 2.7 MHz, 2.5A Adjustable Boost-Buck DC/DC Converter
with Boost and Active Current Assist and Analog Bypass (ACB)
Check for Samples: LM3248
1
FEATURES
DESCRIPTION
The LM3248 is a PWM/PFM Boost-Buck DC/DC
2
Output Voltage VOUT Adjustable from 0.4V to
converter that provides efficient utilization of battery
4.0V (typ.)
power over a wide voltage range. The device
Input Voltage Range VIN from 2.7V to 5.5V
architecture is suitable for advanced RF front-end
Boost-Buck and Buck (Boost-Bypass)
systems that demand dynamic voltage and current to
support
converged
power
amplifier
architectures
Operating Modes with Seamless Transition
operating in 2G/3G/4G and 3GPP/LTE modes. For
2.5A Load Current Capability
example, the LM3248 is designed to produce higher
High Conversion Efficiency (> 90% typ.)
output voltages while maintaining PFM mode as
High-Efficiency PFM/PWM Modes with
required by some new reduced-power CMOS PAs.
The extremely fast Boost-Buck function reduces RF
Seamless Transition
PA overhead power dissipation, extending battery talk
Very Fast Transient Response: 10 µs
time. The device will operate at input voltage VIN
ACB Reduces Inductor Size Requirements
range of 2.7V to 5.5V and an adjustable output
Dither to aid RX Band Noise Compliance
voltage VOUT range of 0.4V to 4.0V at a maximum
current load of 2.5A.
APPLICATIONS
The LM3248 is available in a 30-bump, lead-free thin
DSBGA package.
Multi-mode 2G/3G/4G and 3GPP/LTE Smart-
phones and Tablets
Hand-Held Radios
RF Mobile Devices
Typical Application Diagram
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 © 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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