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LM3262 Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza LM3262
Descripción Electrónicos  Miniature, Adjustable, Step-Down DC-DC Converter
Download  41 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

LM3262 Datasheet(HTML) 1 Page - Texas Instruments

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FB
EN
VIN
VCON
SW
VIN
2.5 V to 5.5V
0.4 V to 3.6 V
10 PF
4.7 PF
PGND
0.5 PH
LM3262
VOUT = 2.5 x VCON
BPEN
SGND
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LM3262
SNVS875O – AUGUST 2012 – REVISED DECEMBER 2015
LM3262 6-MHz, 800-mA Miniature, Adjustable, Step-Down DC-DC
Converter With Auto Bypass for RF Power Amplifiers
1 Features
3 Description
The LM3262 is a DC-DC converter optimized for
1
Operates from a Single Li-Ion Cell (2.5 V to 5.5 V)
powering RF power amplifiers (PAs) from a single
6-MHz (Typical) PWM Switching Frequency
lithium-ion cell; however, it may be used in many
Adjustable Output Voltage (0.4 V to 3.6 V)
other applications such as USB-powered portable
applications. The device 2.5-V to 5.5-V input voltage
800-mA Maximum Load Capability (up to 1 A in
can be stepped down to an adjustable output voltage
Bypass Mode)
range from 0.4 V to 3.6 V. Output voltage is set using
High Efficiency (93% Typical at 3.8 VIN, 3.4 VOUT
a VCON analog input which enables improved RF-
at 500 mA)
stage PA efficiencies.
Automatic ECO/PWM/BP Mode Change
The LM3262 offers five modes of operation. In pulse
Current and Thermal Overload Protection
width modulation (PWM) mode the device operates at
Multi-Function VCON Pin
a fixed frequency of 6 MHz (typical), which minimizes
RF interference at medium-to-low loads. At light load,
(Eliminates Need for Separate BPEN Control)
the device enters into ECO mode automatically and
Soft-Start Function
operates with reduced switching frequency. In ECO
Small Chip Inductor in 0805 (2012) Case Size
mode, the quiescent current is reduced and extends
25-µA (Typical) IQ in Sleep Mode
the battery life. Shutdown mode turns the device off
and reduces battery consumption to 0.1 µA (typical).
5-µs (Typical) Rise Time and Fall Time for
At low-battery condition, bypass mode reduces the
2-V Step
voltage dropout to less than 50 mV (typical). The
9-Pin DSBGA Package
device also features a sleep mode.
The LM3262 is available in a 9-pin, lead-free DSBGA
2 Applications
package. A high-switching frequency (6 MHz) allows
HSUPA, LTE Cellular Phones
use of only three tiny surface-mount components: one
inductor and two ceramic capacitors.
TD-SCDMA and TD-LTE
Hand-Held Radios
Device Information(1)
RF PC Cards
PART NUMBER
PACKAGE
BODY SIZE (MAX)
Battery-Powered RF Devices
LM3262
DSGBA (9)
1.51 mm × 1.385 mm
USB-Powered Portable Applications
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.


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