LTC3809EMSE-1#PBF

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Analog Devices

NO RSENSE™, LOW INPUT VOLTAGE, SYNCHRONOUS DC/DC CONTROLLER WITH OUTPUT TRACKING

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LTC3809EMSE-1#PBF

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Analog Devices

NO RSENSE™, LOW INPUT VOLTAGE, SYNCHRONOUS DC/DC CONTROLLER WITH OUTPUT TRACKING

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Technical Specifications

Parameters and characteristics for this part

Specification	LTC3809EMSE-1#PBF

Clock Sync	False
Control Features	Soft Start, Enable, Tracking
Duty Cycle (Max) [Max]	100 %
Frequency - Switching	550 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	3 Lead, 0.118 in
Package / Case	Exposed Pad, 10-TFSOP, 10-MSOP
Supplier Device Package	10-MSOP-EP
Synchronous Rectifier	True
Topology	Buck
Voltage - Supply (Vcc/Vdd) [Max]	9.8 V
Voltage - Supply (Vcc/Vdd) [Min]	2.75 V

LTC3809-1 Series

No RSENSE™, Low Input Voltage, Synchronous DC/DC Controller with Output Tracking

Part	Output Type	Frequency - Switching	Control Features	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Function	Package / Case	Package / Case	Output Phases	Supplier Device Package	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Number of Outputs	Duty Cycle (Max) [Max]	Output Configuration	Mounting Type
Analog Devices LTC3809IMSE-1#TRPBF	Transistor Driver	550 kHz	Enable Soft Start Tracking	85 °C	-40 °C	Buck	Step-Down	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	1	10-MSOP-EP	2.75 V	9.8 V	1	100 %	Positive	Surface Mount
Analog Devices LTC3809EDD-1#TRPBF	Transistor Driver	550 kHz	Enable Soft Start Tracking	85 °C	-40 °C	Buck	Step-Down		10-WFDFN Exposed Pad	1	10-DFN (3x3)	2.75 V	9.8 V	1	100 %	Positive	Surface Mount
Analog Devices LTC3809EMSE-1#PBF	Transistor Driver	550 kHz	Enable Soft Start Tracking	85 °C	-40 °C	Buck	Step-Down	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	1	10-MSOP-EP	2.75 V	9.8 V	1	100 %	Positive	Surface Mount
Analog Devices LTC3809IDD-1#TRPBF	Transistor Driver	550 kHz	Enable Soft Start Tracking	85 °C	-40 °C	Buck	Step-Down		10-WFDFN Exposed Pad	1	10-DFN (3x3)	2.75 V	9.8 V	1	100 %	Positive	Surface Mount
Analog Devices LTC3809EMSE-1#TRPBF	Transistor Driver	550 kHz	Enable Soft Start Tracking	85 °C	-40 °C	Buck	Step-Down	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	1	10-MSOP-EP	2.75 V	9.8 V	1	100 %	Positive	Surface Mount
Analog Devices LTC3809EDD-1#PBF	Transistor Driver	550 kHz	Enable Soft Start Tracking	85 °C	-40 °C	Buck	Step-Down		10-WFDFN Exposed Pad	1	10-DFN (3x3)	2.75 V	9.8 V	1	100 %	Positive	Surface Mount

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	150	$ 4.53

Description

General part information

LTC3809-1 Series

The LTC3809 is a synchronous step-down switching regulator controller that drives external complementary power MOSFETs using few external components. The constant frequency current mode architecture with MOSFET VDSsensing eliminates the need for a current sense resistor and improves efficiency.For noise sensitive applications, the LTC3809 can be externally synchronized from 250kHz to 750kHz. Burst Mode is inhibited during synchronization or when the SYNC/MODE pin is pulled low to reduce noise and RF interference. To further reduce EMI, the LTC3809 incorporates a novel spread spectrum frequency modulation technique.Burst Mode operation provides high efficiency operation at light loads. 100% duty cycle provides low dropout operation, extending operating time in battery-powered systems.The switching frequency can be programmed up to 750kHz, allowing the use of small surface mount inductors and capacitors.The LTC3809 is available in the tiny footprint thermally enhanced DFN and 10-lead MSOP packages.FeaturesPackageLTC3809PLL, Selectable Spread Spectrum, Power Good3x3 DFN-10, MS-10ELTC3809-1Tracking3x3 DFN-10, MS-10ELTC3808PLL, Selectable Spread Spectrum, Tracking, Power Good4x3 DFN-14, SSOP-16Applications1- or 2-Cell Lithium-Ion Powered DevicesPortable InstrumentsDistributed DC Power Systems