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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

1

•

Input Voltage Range of 3 V to 20 V

fixed-frequency PWM step-down DC-DC regulator, in

•

Dual 2-A Output

a 16-pin WSON or thermally-enhanced HTSSOP

•

Output Voltage Down to 0.6 V

package. With a minimum number of external

components and internal loop compensation, the

•

Internal Compensation

LM26400Y is easy to use.

•

500-kHz PWM Frequency

The ability to drive 2-A loads with an internal 175-m

Ω

•

Separate Enable Pins

NMOS switch using state-of-the-art 0.5-µm BiCMOS

•

Separate Soft-Start Pins

technology results in a high-power density design.

•

Frequency Foldback Protection

The world class control circuitry allows for an ON-

time as low as 40 ns, thus supporting high-frequency

•

175-m

Ω NMOS Switch

conversion over the entire input range of 3 V to 20 V

•

Integrated Bootstrap Diodes

and down to an output voltage of only 0.6 V. The

•

Overcurrent Protection

LM26400Y utilizes peak current-mode control and

•

HTSSOP and WSON Packages

internal compensation to provide high-performance

regulation over a wide range of line and load

•

Thermal Shutdown

conditions. Switching frequency is internally set to

500 kHz, optimal for a broad range of applications in

2 Applications

terms of size versus thermal tradeoffs.

•

DTV-LCD

Given a nonsynchronous architecture, efficiencies

•

Set-Top Boxes

above 90% are easy to achieve. External shutdown is

•

XDSL

included, enabling separate turnon and turnoff of the

two

channels.

Additional

features

include

•

Automotive

programmable soft-start circuitry to reduce inrush

•

Computing Peripherals

current, pulse-by-pulse current limit and frequency

•

Industrial Controls

foldback, integrated bootstrap structure, and thermal

shutdown.

•

Points-of-Load

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

WSON (16)

5.00 mm × 5.00 mm

LM26400Y

HTSSOP (16)

4.40 mm × 5.00 mm

(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.