LTC3832 Series

High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation

Catalog

High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation

Part	Supplier Device Package	Output Configuration	Control Features	Package / Case	Package / Case [y]	Package / Case [x]	Function	Frequency - Switching	Synchronous Rectifier	Mounting Type	Topology	Output Type	Operating Temperature [Max]	Operating Temperature [Min]	Clock Sync	Number of Outputs	Output Phases	Duty Cycle (Max)	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Package / Case	Package / Case
Analog Devices LTC3832-1ES8#TRPBF	8-SO	Positive	Current Limit Enable Frequency Control Soft Start	8-SOIC	3.9 mm	0.154 in	Step-Down	300 kHz		Surface Mount	Buck	Transistor Driver	85 °C	-40 °C		1	1	95 %	3 V	8 V
Analog Devices LTC3832EGN#TRPBF	16-SSOP	Positive	Current Limit Enable Frequency Control Soft Start	16-SSOP			Step-Down	300 kHz		Surface Mount	Buck	Transistor Driver	85 °C	-40 °C		1	1	95 %	3 V	8 V	0.154 in	3.9 mm

Catalog

High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation

Key Features

• VOUTas Low as 0.6V

• High Power Switching Regulator Controller for 3.3V-5V to 0.6V-3.xV Step-Down Applications

• No Current Sense Resistor Required

• Low Input Supply Voltage Range: 3V to 8V

• Maximum Duty Cycle >91% Over Temperature

• All N-Channel External MOSFETs

• Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations

• High Efficiency: Over 95% Possible

• Adjustable or Fixed 2.5V Output (LTC3832)

• Programmable Fixed Frequency Operation: 100kHz to 500kHz

• External Clock Synchronization

• Soft-Start

• Low Shutdown Current: <10µA

• Overtemperature Protection

• Available in SO-8 and SSOP-16 Packages

Description

The LTC3832/LTC3832-1 are high power, high efficiency switching regulator controllers optimized for 3.3V-5V to 0.6V-3.xV step-down applications. A precision internal reference and feedback system provide ±1% output regulation over temperature, load current and line voltage variations. The LTC3832/LTC3832-1 use a synchronous switching architecture with N-channel MOSFETs. Additionally, the chip senses output current through the drain-source resistance of the upper N-channel MOSFET, providing an adjustable current limit without a current sense resistor.The LTC3832/LTC3832-1 operate with an input supply voltage as low as 3V and with a maximum duty cycle of >91% over temperature. They include a fixed frequency PWM oscillator for low output ripple operation. The 300kHz free-running clock frequency can be externally adjusted or synchronized with an external signal from 100kHz to 500kHz. In shutdown mode, the LTC3832 supply current drops to <10µA. The LTC3832-1 is the SO-8 version without current limit, frequency adjustment and shutdown functions.ApplicationsCPU Power SuppliesMultiple Logic Supply GeneratorDistributed Power ApplicationsHigh Efficiency Power Conversion