LTC4414 - 36V, Low Loss PowerPath Controller for Large PFETs

Features

  • Designed Specifically to Drive Large QG PFETs
  • Very Low Loss Replacement for Power Supply OR’ing Diodes
  • 3.5V to 36V AC/DC Adapter Voltage Range
  • Minimal External Components
  • Automatic Switching Between DC Sources
  • Low Quiescent Current: 30µA
  • 3V to 36V Battery Voltage Range
  • Limited Reverse Battery Protection
  • MOSFET Gate Protection Clamp
  • Manual Control Input
  • Space Saving 8-Lead MSOP Package

Typical Application

LTC4414 Typical Application
LTC4414 Typical Application

Description

The LTC4414 controls an external P-channel MOSFET to create a near ideal diode function for power switchover. This permits highly efficient OR’ing of multiple power sources for extended battery life and low self- heating. When conducting, the voltage drop across the MOSFET is typically 20mV. 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. Two or more LTC4414s may be interconnected to allow switchover between multiple batteries or charging of multiple batteries from a single charger.

The wide supply operating range supports operation from one to eight Li-Ion cells in series. The low quiescent current (30µA typical) is independent of the load current. The gate driver includes an internal voltage clamp for MOSFET protection.

The STAT pin can be used to enable an auxiliary P-channel MOSFET power switch when an auxiliary supply is detected. This pin may also be used to indicate to a microcontroller that an auxiliary supply is connected. The control (CTL) input enables the user to force the primary MOSFET off and the STAT pin low.

The LTC4414 is available in a low profile 8-lead MSOP package.

Packaging

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

MS-8

LTC4414 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC4414EMS8 MSOP 8 E $2.64 $1.85 View
LTC4414EMS8#PBF MSOP 8 E $2.64 $1.85 View
LTC4414EMS8#TR MSOP 8 E $1.91 View
LTC4414EMS8#TRPBF MSOP 8 E $1.91 View
LTC4414IMS8 MSOP 8 I $2.93 $2.05 View
LTC4414IMS8#PBF MSOP 8 I $2.93 $2.05 View
LTC4414IMS8#TR MSOP 8 I $2.11 View
LTC4414IMS8#TRPBF MSOP 8 I $2.11 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.

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
DC1635A LTC4412 / LTC4414 Demo Board u VIN1=2.5V to 36V / VIN2= 5V to 36V , V OUT1 @ 2A / V OUT2 @ 8A. $75.00
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Applications

  • High Current Power Path Switch
  • Industrial and Automotive Applications
  • Uninterruptable Power Supplies
  • Logic Controlled Power Switch
  • Battery Backup Systems
  • Emergency Systems with Battery Backups

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Design Tools

LTspiceIV

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Models for the following parts are available in LTspice IV:
LTC4414

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