LTC3407A-2 Series

Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator

Catalog

Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator

Part	Output Type	Package / Case	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Output (Max)	Output Configuration	Number of Outputs	Current - Output	Frequency - Switching	Supplier Device Package	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Voltage - Input (Min) [Min]	Function	Mounting Type	Topology
Analog Devices LTC3407AEMSE#PBF	Adjustable	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	85 °C	-40 °C	5 V	Positive	2	600 mA	1.5 MHz	10-MSOP-EP	5.5 V	0.6 V	2.5 V	Step-Down	Surface Mount	Buck
Analog Devices LTC3407EMSE#PBF	Adjustable	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	85 °C	-40 °C	5 V	Positive	2	600 mA	1.5 MHz	10-MSOP-EP	5.5 V	0.6 V	2.5 V	Step-Down	Surface Mount	Buck
Analog Devices LTC3407EDD#TRPBF	Adjustable		10-WFDFN Exposed Pad	85 °C	-40 °C	5 V	Positive	2	600 mA	1.5 MHz	10-DFN (3x3)	5.5 V	0.6 V	2.5 V	Step-Down	Surface Mount	Buck
Analog Devices LTC3407AEDD-2#TRPBF	Adjustable		10-WFDFN Exposed Pad	85 °C	-40 °C	5 V	Positive	2	800 mA	2.25 MHz	10-DFN (3x3)	5.5 V	0.6 V	2.5 V	Step-Down	Surface Mount	Buck
Analog Devices LTC3407EMSE-2#PBF	Adjustable	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	85 °C	-40 °C	5 V	Positive	2	800 mA	2.25 MHz	10-MSOP-EP	5.5 V	0.6 V	2.5 V	Step-Down	Surface Mount	Buck
Analog Devices LTC3407EMSE-4#TRPBF	Adjustable	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	85 °C	-40 °C	5 V	Positive	2	800 mA	2.25 MHz	10-MSOP-EP	5.5 V	0.6 V	2.5 V	Step-Down	Surface Mount	Buck
Analog Devices LTC3407EDD-4#PBF	Adjustable		10-WFDFN Exposed Pad	85 °C	-40 °C	5 V	Positive	2	800 mA	2.25 MHz	10-DFN (3x3)	5.5 V	0.6 V	2.5 V	Step-Down	Surface Mount	Buck
Analog Devices LTC3407AIMSE#TRPBF	Adjustable	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	125 ¯C	-40 °C	5 V	Positive	2	600 mA	1.5 MHz	10-MSOP-EP	5.5 V	0.6 V	2.5 V	Step-Down	Surface Mount	Buck
Analog Devices LTC3407AEMSE-2#PBF	Adjustable	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	85 °C	-40 °C	5 V	Positive	2	800 mA	2.25 MHz	10-MSOP-EP	5.5 V	0.6 V	2.5 V	Step-Down	Surface Mount	Buck
Analog Devices LTC3407EMSE-2	Adjustable	0.118 in 3 Lead	10-MSOP 10-TFSOP Exposed Pad	85 °C	-40 °C	5 V	Positive	2	800 mA	2.25 MHz	10-MSOP-EP	5.5 V	0.6 V	2.5 V	Step-Down	Surface Mount	Buck

Catalog

Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator

Key Features

• High Efficiency: Up to 95%

• Very Low Quiescent Current: Only 40µA

• 2.25MHz Constant Frequency Operation

• High Switch Current: 1.2A on Each Channel

• No Schottky Diodes Required

• Low RDS(ON)Internal Switches: 0.35Ω

• Current Mode Operation for Excellent Line and Load Transient Response

• Short-Circuit Protected

• Low Dropout Operation: 100% Duty Cycle

• Ultralow Shutdown Current: IQ< 1µA

• Output Voltages from 5V down to 0.6V

• Power-On Reset Output

• Externally Synchronizable Oscillator

• Small Thermally Enhanced MSOP and 3mm × 3mm DFN Packages

• AEC-Q100 Qualified for Automotive Applications

Description

The LTC3407-4 is a dual, constant frequency, synchronous step down DC/DC converter. Intended for low power applications, it operates from 2.5V to 5.5V input voltage range and has a constant 2.25MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors with a profile ≤1mm. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35Ω, 1.2A power switches provide high efficiency without the need for external Schottky diodes.A user selectable mode input is provided to allow the user to trade-off noise ripple for low power efficiency. Burst Mode®operation provides high efficiency at light loads, while Pulse Skip Mode provides low noise ripple at light loads.To further maximize battery life, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle), and both channels draw a total quiescent current of only 40µA. In shutdown, the device draws <1µA.The LTC3407-4 is identical to the LTC3407-2 except for the reduced power-on reset delay time.IoutFswFeaturesLTC34072x 600mA1.5MHzLTC3407-22x 800mA2.25MHzLTC3407-32x 800mA2.25MHzFixed 1.8V/3.3VLTC3407-42x 800mA2.25MHzReduced POR DelayLTC3407A2x 600mA1.5MHzLow Ripple Burst ModeLTC3407A-22x 800mA2.25MHzLow Ripple Burst ModeApplicationsPDAs/Palmtop PCsDigital CamerasCellular PhonesPortable Media PlayersPC CardsWireless and DSL Modems