LM2655

ACTIVE

2.5A High Efficiency Synchronous Switching Regulator

Top

Product details

Parameters

Vin (Min) (V) 4 Vin (Max) (V) 14 Vout (Min) (V) 3.3 Vout (Max) (V) 13 Iout (Max) (A) 2.5 Iq (Typ) (uA) 1700 Switching frequency (Min) (kHz) 255 Switching frequency (Max) (kHz) 345 Features UVLO Adjustable Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

TSSOP (PW) 16 22 mm² 5 x 4.4 open-in-new Find other Buck converters (integrated switch)

Features

  • Ultra-high efficiency up to 96%
  • 4V to 14V input voltage range
  • Internal high-side MOSFET with low RDS(ON) = 0.033
  • 300 kHz fixed frequency internal oscillator
  • Low-side drive for synchronous operation
  • Guaranteed less than 12 µA shutdown current
  • Patented current sensing for current mode control
  • Programmable soft-start
  • Input undervoltage lockout
  • Output overvoltage shutdown protection
  • Output undervoltage shutdown protection
  • Thermal Shutdown
  • 16-pin TSSOP package

open-in-new Find other Buck converters (integrated switch)

Description

The LM2655 is a current-mode controlled PWM step-down switching regulator. It has the unique ability to operate in synchronous or asynchronous mode. This gives the designer flexibility to choose between the high efficiency of synchronous operation, or the low solution cost of asynchronous operation. Along with flexibility, the LM2655 offers high power density with the small footprint of a TSSOP-16 package.

High efficiency (>90%) is obtained through the use of an internal low ON-resistance (33m) MOSFET, and an external N-Channel MOSFET. This feature, together with its low quiescent current, makes the LM2655 an ideal fit in portable applications.

Integrated in the LM2655 are all the power, control, and drive functions for asynchronous operation. In addition, a low-side driver output allows easy synchronous operation. The IC uses patented current sensing circuitry that eliminates the external current sensing resistor required by other current-mode DC-DC converters. A programmable soft-start feature limits start up current surges and provides a means of sequencing multiple power supplies.


open-in-new Find other Buck converters (integrated switch)
Download
Similar products you might be interested in
open-in-new Compare products
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
LM2653 ACTIVE 1.5A High Efficiency Synchronous Switching Regulator 1.5 A non-sync DC/DC with PG.
Similar but not functionally equivalent to the compared device:
LM2650 ACTIVE Synchronous Step-Down DC/DC Converter Higher current 3 A synchronous DC/DC converter.
LM2676 ACTIVE SIMPLE SWITCHER® 8V to 40V, 3A Low Component Count Step-Down Regulator Wide Vin, 40 V, 3 A non-sync.
LM2853 ACTIVE 3A 550 kHz Synchronous Buck Regulator Snc DC/DC 3 A low Vin 3 V to 5.5 V.

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 3
Type Title Date
* Datasheet LM2655 2.5A High Efficiency Synchronous Switching Regulator datasheet (Rev. C) Apr. 14, 2005
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guide LM2655 2.5A Synch Switch Reg Eval Brd (Rev. D) Apr. 24, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 16 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos