Texas Instruments LM3242 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC EVM LM3242TM-EV/NOPB LM3242TM-EV/NOPB 数据表
产品代码
LM3242TM-EV/NOPB
FB
EN
VIN
VCON
SW
V
IN
2.7V to 5.5V
0.4V to 3.6V
10
P
F
4.7
P
F
PGND
0.5
P
H
LM3242
V
OUT
= 2.5 x VCON
BPEN
SGND
DAC
GPO1
SNOSB48D – OCTOBER 2011 – REVISED MARCH 2013
LM3242 6MHz, 750mA Miniature, Adjustable, Step-Down DC-DC Converter with Auto
Bypass for RF Power Amplifiers
Check for Samples:
1
FEATURES
DESCRIPTION
The LM3242 is a DC-DC converter optimized for
2
•
6MHz (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
•
Adjustable Output Voltage (0.4V to 3.6V)
from 2.7V to 5.5V to an adjustable output voltage
from 0.4V to 3.6V. Output voltage is set using a
from 0.4V to 3.6V. Output voltage is set using a
•
750 mA Maximum Load Capability (up to 1A in
VCON analog input for controlling power levels and
Bypass)
efficiency of the RF PA.
•
High Efficiency (95% typ. at 3.9V
IN
, 3.3V
OUT
at
The LM3242 offers five modes of operation. In PWM
500 mA)
mode the device operates at a fixed frequency of
•
Automatic ECO/PWM/BP mode change
6MHz (typ.) which minimizes RF interference when
•
9-bump DSBGA Package
driving medium-to-heavy loads. At light load, the
device enters into ECO mode automatically and
device enters into ECO mode automatically and
•
Current Overload Protection
operates with reduced switching frequency. In ECO
•
Thermal Overload Protection
mode, the quiescent current is reduced and extends
•
Soft-Start Function
the battery life. Shutdown mode turns the device off
and reduces battery consumption to 0.1 µA (typ.). In
and reduces battery consumption to 0.1 µA (typ.). In
•
Small Chip Inductor in 0805 (2012) case size
low-battery condition Bypass mode reduces the
voltage dropout to less than 50 mV (typ.). The part
voltage dropout to less than 50 mV (typ.). The part
APPLICATIONS
also features a Sleep mode.
•
Battery-Powered 3G/4G RF PAs
The LM3242 is available in a 9-bump lead-free
•
Hand-Held Radios
DSBGA package. A high switching frequency (6MHz)
•
RF PC Cards
allows
use
of
only
three
tiny
surface-mount
components:
one
inductor
and
two
ceramic
•
Battery-Powered RF Devices
capacitors.
Typical Application
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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 © 2011–2013, 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.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.