LTC3600 Step-Down Regulator

15 V, 1.5 A synchronous, rail-to-rail, single resistor step-down regulators from Linear Technology

Image of Linear Technology's LTC3600 Step-Down RegulatorThe LTC3600 from Linear Technology is a high efficiency, monolithic synchronous buck regulator whose output is programmed with just one external resistor. The accurate internally generated 50 µA current source on the ISET pin allows the use of a single external resistor to program an output voltage that ranges from 0 V to 0.5 V below VIN. The VOUT voltage feeds directly back to the error amplifier in unity gain fashion and equals the ISET voltage. The operating supply voltage range is 4 V to 15 V, making it suitable for dual lithium-ion battery and 5 V or 12 V input point-of-load power supply applications.

The operating frequency is synchronizable to an external clock or programmable from 200 kHz to 4 MHz with an external resistor. High switching frequency allows the use of small surface mount inductors. The unique constant on-time architecture is ideal for operating at high frequency in high step-down ratio applications that also demand fast load transient response.

Features Applications
  • Single resistor programmable VOUT
  • ±1% ISET accuracy
  • Tight VOUT regulation independent of VOUT voltage
  • Easy to parallel for higher current and heat spreading
  • Wide VOUT range 0 V to VIN - 0.5 V
  • High efficiency: up to 96%
  • 1.5 A Output current
  • Adjustable frequency: 200 kHz to 4 MHz
  • 4 V to 15 V VIN range
  • Current mode operation for excellent line and load transient response
  • <1 µA supply current in shutdown
  • Available in thermally enhanced 12-Pin (3 mm x 3 mm) DFN and MSOP packages
  • Point-of-load power supplies
  • Portable instruments
  • Battery-powered equipment
  • Voltage tracking supplies
  • Distributed power systems

LTC3600 Step-Down Regulator

ImageManufacturer Part NumberDescriptionAvailable Quantity
LTC3600EMSE#PBF product page link
LTC3600IDD#PBF datasheet linkIC REG BUCK PROG 1.5A SYNC 12DFNLTC3600IDD#PBFIC REG BUCK PROG 1.5A SYNC 12DFN1433 - Immediate
LTC3600IDD#PBF product page link
Published: 2012-06-29