LTC3407A - Dual Synchronous 600mA, 1.5MHz Step-Down DC/DC Regulator

LTC3407 - Dual Synchronous, 600mA, 1.5MHz Step-Down DC/DC Regulator

Features

High Efficiency: Up to 96%
Very Low Quiescent Current: Only 40µA
1.5MHz Constant Frequency Operation
High Switch Current: 1A on Each Channel
No Schottky Diodes Required
Low R_DS(ON) Internal Switches: 0.35 Ohm
Current Mode Operation for Excellent Line and Load Transient Response
Short-Circuit Protected
Low Dropout Operation: 100% Duty Cycle
Ultralow Shutdown Current: I_Q < 1µA
Output Voltages from 5V down to 0.6V
Power-On Reset Output
Externally Sychronizable Oscillator
Small Thermally Enhanced MSOP Package and 3mm x 3mm DFN Packages

Typical Application

Description

The LTC3407 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 1.5MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35Ω, 1A 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 ripple noise for low power efficiency. Burst Mode® operation provides high efficiency at light loads, while pulse-skipping mode provides low ripple noise 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.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

MS-10, DFN-10

Order Info

Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)^*	RoHS Data
LTC3407AEDD#PBF	DFN	10	E	$3.71	$2.60	View
LTC3407AEDD#TRPBF	DFN	10	E		$2.66	View
LTC3407AEDD-2	DFN	10	E	$4.21	$2.95	View
LTC3407AEDD-2#PBF	DFN	10	E	$4.21	$2.95	View
LTC3407AEDD-2#TR	DFN	10	E		$3.01	View
LTC3407AEDD-2#TRPBF	DFN	10	E		$3.01	View
LTC3407AEMSE#PBF	MSOP	10	E	$3.71	$2.60	View
LTC3407AEMSE#TRPBF	MSOP	10	E		$2.66	View
LTC3407AEMSE-2	MSOP	10	E	$4.21	$2.95	View
LTC3407AEMSE-2#PBF	MSOP	10	E	$4.21	$2.95	View
LTC3407AEMSE-2#TR	MSOP	10	E		$3.01	View
LTC3407AEMSE-2#TRPBF	MSOP	10	E		$3.01	View
LTC3407AIDD	DFN	10	I	$4.27	$2.99	View
LTC3407AIDD#PBF	DFN	10	I	$4.27	$2.99	View
LTC3407AIDD#TR	DFN	10	I		$3.05	View
LTC3407AIDD#TRPBF	DFN	10	I		$3.05	View
LTC3407AIDD-2	DFN	10	I	$4.84	$3.39	View
LTC3407AIDD-2#PBF	DFN	10	I	$4.84	$3.39	View
LTC3407AIDD-2#TR	DFN	10	I		$3.45	View
LTC3407AIDD-2#TRPBF	DFN	10	I		$3.45	View
LTC3407AIMSE	MSOP	10	I	$4.27	$2.99	View
LTC3407AIMSE#PBF	MSOP	10	I	$4.27	$2.99	View
LTC3407AIMSE#TR	MSOP	10	I		$3.05	View
LTC3407AIMSE#TRPBF	MSOP	10	I		$3.05	View
LTC3407AIMSE-2	MSOP	10	I	$4.84	$3.39	View
LTC3407AIMSE-2#PBF	MSOP	10	I	$4.84	$3.39	View
LTC3407AIMSE-2#TR	MSOP	10	I		$3.45	View
LTC3407AIMSE-2#TRPBF	MSOP	10	I		$3.45	View
LTC3407EDD	DFN	10	E	$3.71	$2.60	View
LTC3407EDD#PBF	DFN	10	E	$3.71	$2.60	View
LTC3407EDD#TR	DFN	10	E		$2.66	View
LTC3407EDD#TRPBF	DFN	10	E		$2.66	View
LTC3407EDD-2	DFN	10	E	$4.21	$2.95	View
LTC3407EDD-2#PBF	DFN	10	E	$4.21	$2.95	View
LTC3407EDD-2#TR	DFN	10	E		$3.01	View
LTC3407EDD-2#TRPBF	DFN	10	E		$3.01	View
LTC3407EDD-3	DFN	10	E	$4.21	$2.95	View
LTC3407EDD-3#PBF	DFN	10	E	$4.21	$2.95	View
LTC3407EDD-3#TR	DFN	10	E		$3.01	View
LTC3407EDD-3#TRPBF	DFN	10	E		$3.01	View
LTC3407EDD-4	DFN	10	E	$4.21	$2.95	View
LTC3407EDD-4#PBF	DFN	10	E	$4.21	$2.95	View
LTC3407EDD-4#TR	DFN	10	E		$3.01	View
LTC3407EDD-4#TRPBF	DFN	10	E		$3.01	View
LTC3407EMSE	MSOP	10	E	$3.71	$2.60	View
LTC3407EMSE#PBF	MSOP	10	E	$3.71	$2.60	View
LTC3407EMSE#TR	MSOP	10	E		$2.66	View
LTC3407EMSE#TRPBF	MSOP	10	E		$2.66	View
LTC3407EMSE-2	MSOP	10	E	$4.21	$2.95	View
LTC3407EMSE-2#PBF	MSOP	10	E	$4.21	$2.95	View
LTC3407EMSE-2#TR	MSOP	10	E		$3.01	View
LTC3407EMSE-2#TRPBF	MSOP	10	E		$3.01	View
LTC3407EMSE-4	MSOP	10	E	$4.21	$2.95	View
LTC3407EMSE-4#PBF	MSOP	10	E	$4.21	$2.95	View
LTC3407EMSE-4#TR	MSOP	10	E		$3.01	View
LTC3407EMSE-4#TRPBF	MSOP	10	E		$3.01	View
LTC3407IDD-2#PBF	DFN	10	I	$4.84	$3.39	View
LTC3407IDD-2#TRPBF	DFN	10	I		$3.45	View
LTC3407IMSE-2#PBF	MSOP	10	I	$4.84	$3.39	View
LTC3407IMSE-2#TRPBF	MSOP	10	I		$3.45	View
Buy Now • Request Samples

^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number	Description	Price	Documentation
DC1180A	LTC3407AEDD \| Dual, Sync. 600mA 1.5MHz Step-dwn Convrtr in DFN	$100.00	Design File Manual Schematic
DC568A	LTC3407EMSE \| Dual DC/DC Converter, Vin = 2.5V to 5.5V, Vout1 = 1.2V/1.5V/1.8V @ 600mA, Vout2 = 2.5V @ 600mA	$100.00	Design File Manual Schematic
DC701A	LTC3407EDD \| Dual Synchronous Step-Down DC/DC Converter, Vin = 2.5V - 5.5V, Vout1 = 1.2V / 1.5V / 1.8V @ 600mA, Vout2 = 2.5V @ 600mA	$100.00	Design File Manual Schematic
Buy Now

Click here to view our complete list of demo boards

Applications

PDAs/Palmtop PCs
Digital Cameras
Cellular Phones
Portable Media Players
PC Cards
Wireless and DSL Modems

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Simulate

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.

To launch a ready to run LTspice demonstration circuit for this part:

Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
- LTC3407 Demo Circuit - Dual 1.5MHz, 600mA, Synchronous Step-Down Regulator (3.3V to 1.2V @ 600mA & 1.8V @ 600mA)
Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Related models available in LTspice IV
LTC3407-2
LTC3407-3
LTC3407-4
LTC3407
LTC3407A-2
LTC3407A

Technical Support

For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.