LT3480 Series

36V, 2A, 2.4MHz Step-Down Switching Regulator with 70µA Quiescent Current

Catalog

36V, 2A, 2.4MHz Step-Down Switching Regulator with 70µA Quiescent Current

Part	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Output (Min/Fixed) [Min]	Voltage - Input (Max) [Max]	Voltage - Input (Min) [Min]	Current - Output	Topology	Mounting Type	Output Type	Number of Outputs	Package / Case	Package / Case	Function	Frequency - Switching [Max]	Frequency - Switching [Min]	Supplier Device Package	Voltage - Output (Max) [Max]	Output Configuration
Analog Devices LT3480MPMSE#PBF	-55 °C	150 °C	0.79 V	36 V	3.6 V	2 A	Buck	Surface Mount	Adjustable	1	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	Step-Down	2.4 MHz	200 kHz	10-MSOP-EP	20 V	Positive
Analog Devices LT3480MPMSE	-55 °C	150 °C	0.79 V	36 V	3.6 V	2 A	Buck	Surface Mount	Adjustable	1	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	Step-Down	2.4 MHz	200 kHz	10-MSOP-EP	20 V	Positive
Analog Devices LT3480IMSE#PBF	-40 °C	125 ¯C	0.79 V	36 V	3.6 V	2 A	Buck	Surface Mount	Adjustable	1	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	Step-Down	2.4 MHz	200 kHz	10-MSOP-EP	20 V	Positive
Analog Devices LT3480IDD#PBF	-40 °C	125 ¯C	0.79 V	36 V	3.6 V	2 A	Buck	Surface Mount	Adjustable	1		10-WFDFN Exposed Pad	Step-Down	2.4 MHz	200 kHz	10-DFN (3x3)	20 V	Positive

Catalog

36V, 2A, 2.4MHz Step-Down Switching Regulator with 70µA Quiescent Current

Key Features

• Wide Input Range:

• Operation from 3.6V to 36V

• Over-Voltage Lockout Protects Circuits through 60V Transient

• 2A Maximum Output Current

• Low Ripple Burst Mode®Operation

• 70µA IQat 12VINto 3.3VOUT

• Output Ripple < 15mV

• Adjustable Switching Frequency: 200kHz to 2.4MHz

• Low Shutdown Current: IQ< 1µA

• Integrated Boost Diode

• Synchronizable Between 250kHz to 2MHz

• Power Good Flag

• Saturating Switch Design: 0.25Ω On-Resistance

• 0.790V Feedback Reference Voltage

• Output Voltage: 0.79V to 20V

• Soft-Start Capability

• Small 10-Pin Thermally Enhanced MSOP and (3mm × 3mm) DFN Packages

Description

The LT3480 is an adjustable frequency (200kHz to 2.4MHz) monolithic buck switching regulator that accepts input voltages up to 36V (60V maximum). A high efficiency 0.25Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. Current mode topology is used for fast transient response and good loop stability. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application. In addition, the LT3480 can further enhance low output current efficiency by drawing bias current from the output when VOUTis above 3V. Shutdown reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUTreaches 86% of the programmed output voltage. The LT3480 is available in 10-Pin MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance.ApplicationsAutomotive Battery RegulationPower for Portable ProductsDistributed Supply RegulationIndustrial Supplies