LTC3830 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	Output Configuration	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Supplier Device Package	Synchronous Rectifier	Function	Mounting Type	Duty Cycle (Max)	Output Type	Number of Outputs	Package / Case	Package / Case [x]	Package / Case [y]	Topology	Control Features	Clock Sync	Frequency - Switching	Output Phases
Analog Devices LTC3830ES#PBF	Positive	85 °C	-40 °C	3 V	8 V	16-SO		Step-Down	Surface Mount	95 %	Transistor Driver	1	16-SOIC	0.154 in	3.9 mm	Buck	Current Limit Enable Frequency Control Soft Start		200 kHz	1
Analog Devices LTC3830-1ES8#PBF	Positive	85 °C	-40 °C	3 V	8 V	8-SO		Step-Down	Surface Mount	95 %	Transistor Driver	1	8-SOIC	0.154 in	3.9 mm	Buck	Current Limit Enable Frequency Control Soft Start		200 kHz	1

Catalog

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

Key Features

• High Power Switching Regulator Controller for 3.3V-5V to 1.xV-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 3.3V Output (16-Pin Version)

• Programmable Fixed Frequency Operation: 100kHz to 500kHz

• External Clock Synchronization

• Soft-Start (16-Pin Version and LTC3830-1)

• Low Shutdown Current: <10µA

• Overtemperature Protection

• Available in S8, S16 and SSOP-16 Packages

Description

The LTC3830/LTC3830-1 are high power, high efficiency switching regulator controllers optimized for 3.3V-5V to 1.xV-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 LTC3830/LTC3830-1 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 FET, providing an adjustable current limit without a current sense resistor.The LTC3830/LTC3830-1 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 200kHz free-running clock frequency can be externally adjusted or synchronized with an external signal from 100kHz to 500kHz. In shutdown mode, the LTC3830 supply current drops to <10µA. The LTC3830-1 differs from the LTC3830 S8 version by replacing shutdown with a soft-start function.For a similar, pin compatible DC/DC converter with an output voltage as low as 0.6V, please refer to theLTC3832.ApplicationsCPU Power SuppliesMultiple Logic Supply GeneratorDistributed Power ApplicationsHigh Efficiency Power Conversion