1. Skip to navigation
  2. Skip to content
  3. Skip to sidebar

Solutions Power Management Switching Regulator Buck-Boost Regulators µModule Buck-Boost Regulators

Media Contacts

Deutsch  |  Français  |  Italiano  |   简体中文  |  繁體中文  |  日本語  |  한국어

Buck-Boost DC/DC uModule Regulator Uses Few Components & Dissipates Less than 2.4W at 60WOUT without Hot Spots

MILPITAS, CA - November 5, 2007 - Linear Technology Corporation extends its family of DC/DC uModule™ regulator systems with products that can regulate an output voltage from a variable input voltage greater than, less than or equal to the output voltage. The LTM4605 is the first device in a new family of buck-boost products and operates from 4.5VIN to 20VIN, regulates an output voltage from 0.8V to16V and delivers an output power up to 150W. The LTM4605 integrates a synchronous buck-boost DC/DC controller, four N-channel MOSFETs, input and output bypass capacitors and the compensation circuitry in a 15mm x 15mm x 2.8mm land grid array (LGA) plastic molded package. Only an inductor, feedback and sense resistors and bulk capacitors are required to implement a very low profile, compact and high efficiency design. The LTM4605 provides a compact regulator solution in applications such as networking, industrial and automotive systems and high-power battery operated devices.

LTM4605 PR Image

Click Photo for High-Res Image		   With the LTM4605's on-board proprietary 4-switch synchronous MOSFET design, the product achieves up to 97.3% efficiency in boost mode and up to 97.7% efficiency in buck mode (VIN: 4.5V to 20V, VOUT: 12V, IOUT: 5A). Whereas other topologies such as SEPIC (Single Ended Primary Inductor Converter) require as many as 20 components and custom magnetics, this buck-boost uModule solution uses only eight components and an off-the-shelf inductor. In addition, the efficiency of a comparable SEPIC circuit is approximately 76% to 84%. Furthermore, to reduce undesirable frequency harmonics, the LTM4605 is phase-lockable to an external clock frequency ranging from 200kHz to 400kHz. Safety features include overvoltage and foldback current protection.

The LTM4605 is offered for operation from -40ºC to 85ºC temperature range. 1,000-piece pricing starts at $18.85 each.


Summary of Features: LTM4605
•  Single Inductor Buck-Boost Architecture
•  Synchronous 4-Switch Operation for High Efficiency
(up to 98%)
•  Wide Input Voltage Range: 4.5V to 20V
•  Wide Output Voltage Range: 0.8V to 16V
•  1% Set Point Output Voltage Accuracy
•  15mm x 15mm x 2.8mm LGA Package
 


Simplest High Power Buck-Boost DC/DC Solution

LTM4605 PR Image

Click Photo for High-Res Image