LTC3413 - 3A, 2MHz Monolithic Synchronous Regulator for DDR/QDR Memory Termination

Features

• High Efficiency: Up to 90%
• ±3A Output Current
• Symmetrical Source and Sink Output Current Limit
• Low R_DS(ON) Internal Switch: 85mOhm
• No Schottky Diode Required
• 2.25V to 5.5V Input Voltage Range
• V_OUT = V_REF /2
• ±1% Output Voltage Accuracy
• Programmable Switching Frequency: Up to 2MHz
• Power Good Output Voltage Monitor
• Overtemperature Protected
• Available in 16-Lead TSSOP Exposed Pad Package

Typical Application

Description

The LTC3413 is a high efficiency monolithic synchronous step-down DC/DC converter utilizing a constant frequency, current mode architecture. It operates from an input voltage range of 2.25V to 5.5V and provides a regulated output voltage equal to (0.5)V_REF while sourcing or sinking up to 3A of output current. An internal voltage divider reduces component count and eliminates the need for external resistors by dividing the reference voltage in half. The internal synchronous power switch with 85mOhm on-resistance increases efficiency and eliminates the need for an external Schottky diode. Switching frequencies up to 2MHz are set by an external resistor.

Forced-continuous operation in the LTC3413 reduces noise and RF interference. Fault protection is provided by an overcurrent comparator that limits output current during both sourcing and sinking operations. Adjustable compensation allows the transient response to be optimized over a wide range of loads and output capacitors.

Packaging

TSSOP-16E

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
LTC3413EFE	TSSOP	16	E	$5.72	$3.95	View
LTC3413EFE#PBF	TSSOP	16	E	$5.72	$3.95	View
LTC3413EFE#TR	TSSOP	16	E		$4.07	View
LTC3413EFE#TRPBF	TSSOP	16	E		$4.07	View
LTC3413IFE	TSSOP	16	I	$6.21	$4.35	View
LTC3413IFE#PBF	TSSOP	16	I	$6.21	$4.35	View
LTC3413IFE#TR	TSSOP	16	I		$4.41	View
LTC3413IFE#TRPBF	TSSOP	16	I		$4.41	View
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^* 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.

Applications

• Bus Termination: DDR and QDR™ Memory, SSTL, HSTL, ...
• Notebook Computers
• Distributed Power Systems

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