LTC3246
LTC3246
RECOMMENDED FOR NEW DESIGNSWide VIN Range Buck-Boost Charge Pump with Watchdog Timer
- Part Models
- 8
- 1ku List Price
- Starting From $4.92
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Overview
- 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
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
Documentation
Data Sheet 1
User Guide 1
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3246EMSE#PBF | 16-Lead MSOP w/ EP | ||
| LTC3246EMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LTC3246HMSE#PBf | 16-Lead MSOP w/ EP | ||
| LTC3246HMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LTC3246IMSE#PBF | 16-Lead MSOP w/ EP | ||
| LTC3246IMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LTC3246MPMSE#PBF | 16-Lead MSOP w/ EP | ||
| LTC3246MPMSE#TRPBF | 16-Lead MSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC3246EMSE#PBF | PRODUCTION | |
| LTC3246EMSE#TRPBF | PRODUCTION | |
| LTC3246HMSE#PBf | PRODUCTION | |
| LTC3246HMSE#TRPBF | PRODUCTION | |
| LTC3246IMSE#PBF | PRODUCTION | |
| LTC3246IMSE#TRPBF | PRODUCTION | |
| LTC3246MPMSE#PBF | PRODUCTION | |
| LTC3246MPMSE#TRPBF | PRODUCTION | |
|
Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process |
||
| LTC3246EMSE#PBF | PRODUCTION | |
| LTC3246EMSE#TRPBF | PRODUCTION | |
| LTC3246HMSE#PBf | PRODUCTION | |
| LTC3246HMSE#TRPBF | PRODUCTION | |
| LTC3246IMSE#PBF | PRODUCTION | |
| LTC3246IMSE#TRPBF | PRODUCTION | |
| LTC3246MPMSE#PBF | PRODUCTION | |
| LTC3246MPMSE#TRPBF | PRODUCTION | |
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LTC3246MPMSE#PBF | PRODUCTION | |
| LTC3246MPMSE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3246
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.
Evaluation Kits
LTC3246 Demo Board | Wide VIN Range Buck-Boost Charge Pump with Watchdog Timer