LTC4416 - 36V, Low Loss Dual PowerPath Controllers for Large PFETs

Features

• Designed Specifically to Drive Large and Small Q_G PFETs
• Very Low Loss Replacement for Power Supply OR’ing Diodes
• Wide Operating Voltage Range: 3.6V to 36V
• –40°C to 125°C Operating Temperature Range
• Reverse Battery Protection
• Automatic Switching Between DC Sources
• Low Quiescent Current: 35μA per Channel
• Load Current Sharing
• MOSFET Gate Protection Clamp
• Precision Input Control Comparators for Setting Switchover Threshold Points
• Open-Drain Feedback Points for Customer Specified Hysteresis Control
• Minimal External Components
• Space Saving 10-Lead MSOP Package

Typical Application

Description

The LTC4416/LTC4416-1 control two sets of external P-channel MOSFETs to create two near ideal diode functions for power switchover circuits. This permits highly effi cient OR’ing of multiple power sources for extended battery life and low self heating. When conducting, the voltage drop across the MOSFET is typically 25mV. For applications with a wall adapter or other auxiliary power source, the load is automatically disconnected from the battery when the auxiliary source is connected.

The LTC4416 integrates two interconnected PowerPath controllers with soft switchover control. The “soft-off” switchover permits the users to transfer between two dissimilar voltages without excessive voltage undershoot (or VDROOP) in the output supply. The LTC4416/LTC4416-1 also contain a “fast-on” feature that dramatically increases gate drive current when the forward input voltage exceeds 25mV. The LTC4416 “fast off” feature is engaged when the sense voltage exceeds the input voltage by 25mV. The LTC4416-1 enables the fast off under the same conditions and when the other external P-channel device is selected using the enable pins.

The wide operating supply range supports operation from one to eight Li-Ion cells in series. The low quiescent current (35μA per channel) is independent of the load current. The gate driver includes an internal voltage clamp for MOSFET protection.

The LTC4416/LTC4416-1 are available in low profi le 10-lead MSOP packages.

Packaging

MS-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
LTC4416EMS#PBF	MSOP	10	E	$3.78	$2.45	View
LTC4416EMS#TRPBF	MSOP	10	E		$2.51	View
LTC4416EMS-1#PBF	MSOP	10	E	$3.78	$2.45	View
LTC4416EMS-1#TRPBF	MSOP	10	E		$2.51	View
LTC4416IMS#PBF	MSOP	10	I	$4.56	$2.95	View
LTC4416IMS#TRPBF	MSOP	10	I		$3.01	View
LTC4416IMS-1#PBF	MSOP	10	I	$4.56	$2.95	View
LTC4416IMS-1#TRPBF	MSOP	10	I		$3.01	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

• High Current PowerPath Switch
• Industrial and Automotive Applications
• Uninterruptible Power Supplies
• Logic Controlled Power Switch
• Battery Backup System
• Emergency Systems with Battery Backups

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