Date: 20/11/2010

2.6A, 36V buck switching regulator from Linear Tech with dual linear controllers

Linear Technology Corporation has unveiled the LT3694, a 2.6A, 36V step-down switching regulator with dual linear controllers, packaged in a 4mm x 5mm QFN or TSSOP-20E. The LT3694 operates from a VIN range of 4V to 36V with transient protection to 70V, making it ideal for load dump and cold-crank conditions found in automotive applications. Its internal 3.5A switch can deliver up to 2.6A of continuous output current at voltages as low as 0.75V. Its switching frequency is user-programmable from 250kHz to 2.5MHz. Each integrated LDO controller has an accurate programmable current limit up to 1A. Combined with NPN transistors, they can be used to offer dual low noise outputs in addition to the primary channel.

The LT3694's main switcher utilizes a 3.5A switch, with the necessary oscillator, control, logic circuitry and LDO controllers integrated into a single die. A diode current limit pin offers an additional level of overload protection. Other features include a power good flag, independent tracking/soft-start pins and programmable undervoltage lockout.

Package:
LT3694EUFD and LT3694-1EUFD: 4mm x 5mm 28-lead QFN
LT3694EFE and LT3694-1EFE: 20-lead, thermally enhanced TSSOP
LT3694IUFD, LT3694-1IUFD, LT3694IFE and LT3694-1IFE: 20-lead, thermally enhanced TSSOP

Price:
LT3694EUFD and LT3694-1EUFD: Each US$3.85 for 1K pieces.
LT3694EFE and LT3694-1EFE: Each US$4.00 for 1K pieces.
LT3694IUFD and LT3694-1IUFD: Each US$4.24 for 1K pieces.
LT3694IFE and LT3694-1IFE: Each US$4.00 for 1K pieces.

Availability: Now