LTC3246
Wide VIN Range Buck-Boost Charge Pump with Watchdog Timer
Top
Overview
Features and Benefits
- 2.7V – 38V Operating Range (42V Abs Max)
- IQ = 20μA Operating, 1.5μA in Shutdown
- Multi-Mode Buck-Boost Charge Pump (2:1, 1:1, 1:2) with Automatic Mode Switching
- 12V to 5V Efficiency = 81%
- IOUT Up to 500mA
- VOUT: Fixed 3.3V, 5V or Adjustable (2.5V to 5V)
- Ultralow EMI Emissions
- Engineered for Diagnostic Coverage in ISO 26262 Systems
- Overtemperature, Overvoltage and Short Circuit Protection
- Operating Junction Temperature: 150°C Max
- POR/Watchdog Controller w/External Timing Control
- Thermally Enhanced 16-Pin MSOP Package
Product Details
The LTC3246 is a switched capacitor buck-boost DC/DC converter with integrated watchdog timer. The device produces a regulated output (3.3V, 5V or adjustable) from a 2.7V to 38V input. Switched capacitor fractional conversion is used to maintain regulation over a wide range of input voltage. Internal circuitry automatically selects the conversion ratio to optimize efficiency as input voltage and load conditions vary. No inductors are required.
The LTC3246’s reset time and watchdog timeout may be set without external components, or adjusted using external capacitors. A windowed watchdog function is used for high reliability applications. The reset input can be used for additional supply monitoring or be configured as a pushbutton reset.
Low operating current (20μA without load, 1.5μA in shutdown) and low external parts count make the LTC3246 ideally suited for low power, space constrained automotive/ industrial applications. The device is short-circuit and overtemperature protected and is available in a thermally enhanced 16-pin MSOP package.
Applications
- Automotive ECU/CAN Transceiver Supplies
- Industrial/Telecom Housekeeping Supplies
- Low Power 12V to 5V Conversion
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
-
DC2466A - Demo Manual8/4/2017
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC3246
Product Recommendations
LTC3246 Companion Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC3246EMSE#PBF | Material Declaration | Reliability Data | 16-Lead MSOP w/ EP | |
| LTC3246EMSE#TRPBF | Material Declaration | Reliability Data | 16-Lead MSOP w/ EP | |
| LTC3246HMSE#PBf | Material Declaration | Reliability Data | 16-Lead MSOP w/ EP | |
| LTC3246HMSE#TRPBF | Material Declaration | Reliability Data | 16-Lead MSOP w/ EP | |
| LTC3246IMSE#PBF | Material Declaration | Reliability Data | 16-Lead MSOP w/ EP | |
| LTC3246IMSE#TRPBF | Material Declaration | Reliability Data | 16-Lead MSOP w/ EP | |
| LTC3246MPMSE#PBF | Material Declaration | Reliability Data | 16-Lead MSOP w/ EP | |
| LTC3246MPMSE#TRPBF | Material Declaration | Reliability Data | 16-Lead MSOP w/ EP | |
| Wafer Fabrication Data |
PCN-PDN Information
Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.
Support & Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku 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 Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.