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LM26400Y
SNVS457D –FEBRUARY 2007–REVISED OCTOBER 2015
LM26400Y Dual 2-A, 500-kHz Wide Input Range Buck Regulator
1 Features
3 Description
The LM26400Y device is a monolithic, two-output
fixed-frequency PWM step-down DC-DC regulator, in
a 16-pin WSON or thermally-enhanced HTSSOP
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Input Voltage Range of 3 V to 20 V
Dual 2-A Output
Output Voltage Down to 0.6 V
Internal Compensation
package. With
a minimum number of external
components and internal loop compensation, the
LM26400Y is easy to use.
500-kHz PWM Frequency
Separate Enable Pins
The ability to drive 2-A loads with an internal 175-mΩ
NMOS switch using state-of-the-art 0.5-µm BiCMOS
technology results in a high-power density design.
The world class control circuitry allows for an ON-
time as low as 40 ns, thus supporting high-frequency
conversion over the entire input range of 3 V to 20 V
and down to an output voltage of only 0.6 V. The
LM26400Y utilizes peak current-mode control and
internal compensation to provide high-performance
regulation over a wide range of line and load
conditions. Switching frequency is internally set to
500 kHz, optimal for a broad range of applications in
terms of size versus thermal tradeoffs.
Separate Soft-Start Pins
Frequency Foldback Protection
175-mΩ NMOS Switch
Integrated Bootstrap Diodes
Overcurrent Protection
HTSSOP and WSON Packages
Thermal Shutdown
2 Applications
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DTV-LCD
Given a nonsynchronous architecture, efficiencies
above 90% are easy to achieve. External shutdown is
included, enabling separate turnon and turnoff of the
Set-Top Boxes
XDSL
two
channels.
Additional
features
include
Automotive
programmable soft-start circuitry to reduce inrush
current, pulse-by-pulse current limit and frequency
foldback, integrated bootstrap structure, and thermal
shutdown.
Computing Peripherals
Industrial Controls
Points-of-Load
Device Information(1)
PART NUMBER
PACKAGE
WSON (16)
HTSSOP (16)
BODY SIZE (NOM)
5.00 mm × 5.00 mm
4.40 mm × 5.00 mm
LM26400Y
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
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.