LT3500 Series

Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller

Catalog

Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller

Part	Voltage/Current - Output 2	Voltage/Current - Output 2	Mounting Type	Voltage - Supply [Max]	Voltage - Supply [Min]	Topology	Number of Outputs	Frequency - Switching [Min]	Frequency - Switching [Max]	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case	Voltage/Current - Output 1 [Max]	Voltage/Current - Output 1	Voltage/Current - Output 1 [Min]
Analog Devices LT3500EMSE#PBF	13 mA	Adjustable	Surface Mount	36 V	3 V	Linear (LDO) (1) Step-Down (Buck) (1)	2	500 kHz	2.4 MHz	16-MSOP-EP	125 °C	-40 °C	16-TFSOP Exposed Pad	0.118 in 3 mm	38.9 V	2 A	0.8 V
Analog Devices LT3500IDD#TRPBF	13 mA	Adjustable	Surface Mount	36 V	3 V	Linear (LDO) (1) Step-Down (Buck) (1)	2	500 kHz	2.4 MHz	12-DFN (3x3)	125 °C	-40 °C	12-WFDFN Exposed Pad		38.9 V	2 A	0.8 V
Analog Devices LT3500HDD#PBF	13 mA	Adjustable	Surface Mount	36 V	3 V	Linear (LDO) (1) Step-Down (Buck) (1)	2	500 kHz	2.4 MHz	12-DFN (3x3)			12-WFDFN Exposed Pad		38.9 V	2 A	0.8 V
Analog Devices LT3500IDD#PBF	13 mA	Adjustable	Surface Mount	36 V	3 V	Linear (LDO) (1) Step-Down (Buck) (1)	2	500 kHz	2.4 MHz	12-DFN (3x3)	125 °C	-40 °C	12-WFDFN Exposed Pad		38.9 V	2 A	0.8 V
Analog Devices LT3500EDD#TRPBF	13 mA	Adjustable	Surface Mount	36 V	3 V	Linear (LDO) (1) Step-Down (Buck) (1)	2	500 kHz	2.4 MHz	12-DFN (3x3)	125 °C	-40 °C	12-WFDFN Exposed Pad		38.9 V	2 A	0.8 V

Catalog

Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller

Key Features

• Wide Input Range: 3V to 36V Operating, 40V Maximum

• Short-Circuit Protected Over Full Input Range

• 2A Output Current Capability

• Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2.2MHz

• Soft-Start/Tracking Capability

• Output Adjustable Down to 0.8V

• Adjustable Linear Regulator/Driver with 13mA Output Capability

• Power Good Comparator with Complimentary Outputs

• Low Shutdown Current: 12μA

• Thermally Enhanced 3mm × 3mm DFN or 16-Pin MSOP Package

Description

The LT3500 is a current mode PWM step-down DC/DC converter with an internal 2.3A switch. The wide input range of 3V to 40V makes the LT3500 suitable for regulating power from a wide variety of sources, including automotive batteries, 24V industrial supplies and unregulated wall adapters.Resistor-programmable 250kHz to 2.2MHz frequency range and synchronization capability enable optimization between efficiency and external component size. Cycle-by-cycle current limit, frequency foldback and thermal shutdown provide protection against a shorted output. The soft-start feature controls the ramp rate of the output voltage, eliminating input current surge during start-up, and also provides output tracking.The LT3500 contains an internal NPN transistor with feedback control which can be configured as a linear regulator or as a linear regulator controller.The LT3500’s low current shutdown mode (<12μA) enables easy power management in battery-powered systems.ApplicationsAutomotive Battery RegulationIndustrial ControlWall Transformer RegulationDistributed Power Regulation