LTC3896 - 150V Low IQ, Synchronous Inverting DC/DC Controller

Features

  • Wide VIN + |VOUT| Range: 4V to 140V (150V Abs Max)
  • Wide Output Voltage Range: –60V to –0.8V
  • Ground-Referenced Control / Interface Pins
  • Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
  • Integrated Bootstrap Diode
  • Low Operating IQ: 40μA (Shutdown = 10μA)
  • Selectable Gate Drive UVLO Thresholds
  • Onboard LDO or External NMOS LDO for DRVCC
  • EXTVCC LDO Powers Drivers from Output
  • Phase-Lockable Frequency (75kHz to 850kHz)
  • Programmable Fixed Frequency (50kHz to 900kHz)
  • Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Loads
  • Adjustable Burst Clamp and Current Limit
  • Power Good Output Voltage Monitor
  • Programmable Input Overvoltage Lockout
  • 38-Lead TSSOP High Voltage Package
Designed for Automotive and Transportation Applications
AEC-Q100 generic family data available for specific packages


Typical Application

LTC3896 Typical Application
LTC3896 Typical Application

Description

The LTC®3896 is a high performance inverting DC/DC switching regulator controller that drives an all N-channel synchronous power MOSFET stage. It converts a wideranging positive input voltage source to a regulated negative output that can be as much as 60V below ground. The input can operate from a voltage as low as 4V and as high as 140V – |VOUT|.

The LTC3896 contains true ground-referenced RUN, PLLIN and PGOOD pins, eliminating the need for external discrete level-shifting components to interface with the LTC3896.

A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. The low 40μA no-load quiescent current extends operating run time in battery-powered systems. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3896 features a precision 0.8V reference and power good output indicator. The soft-start (SS) pin ramps the output voltage during start-up.

Packaging

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

Part Number Package Code Temp Package
Drawing
RoHS
LTC3896EFE#PBF TSSOP-38 FE E 05-08-1865 Yes
LTC3896EFE#TRPBF TSSOP-38 FE E 05-08-1865 Yes
LTC3896HFE#PBF TSSOP-38 FE H 05-08-1865 Yes
LTC3896HFE#TRPBF TSSOP-38 FE H 05-08-1865 Yes
LTC3896IFE#PBF TSSOP-38 FE I 05-08-1865 Yes
LTC3896IFE#TRPBF TSSOP-38 FE I 05-08-1865 Yes


LTC3896 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • 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 Temp Price
(1-99)
Price
(1k)*
RoHS
LTC3896EFE#PBF TSSOP-38 E $6.71 $4.70 Yes
LTC3896EFE#TRPBF TSSOP-38 E $6.77 $4.76 Yes
LTC3896HFE#PBF TSSOP-38 H $8.00 $5.60 Yes
LTC3896HFE#TRPBF TSSOP-38 H $8.06 $5.66 Yes
LTC3896IFE#PBF TSSOP-38 I $7.57 $5.30 Yes
LTC3896IFE#TRPBF TSSOP-38 I $7.63 $5.36 Yes
Buy NowRequest 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
DC2447A LTC3896EFE Demo Board | Sync Inverting Controller, 7V ≤ VIN ≤ 72V; Vout = -12V @ 5A $225.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

Please contact your local sales representative for more information regarding reliability reports and AEC-Q100 data or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC3896EFE#PBF TSSOP-38 E $6.71 $4.70 Yes
LTC3896EFE#TRPBF TSSOP-38 E $6.77 $4.76 Yes
LTC3896HFE#PBF TSSOP-38 H $8.00 $5.60 Yes
LTC3896HFE#TRPBF TSSOP-38 H $8.06 $5.66 Yes
LTC3896IFE#PBF TSSOP-38 I $7.57 $5.30 Yes
LTC3896IFE#TRPBF TSSOP-38 I $7.63 $5.36 Yes
Buy NowRequest 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.

Applications

  • Automotive and Industrial Power Systems
  • Telecommunications Power Supplies
  • Distributed Power Systems

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC3896

LTpowerCAD

The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:
LTC3896

Technical Support