LTC3246IMSE#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LTC3246IMSE#PBF is a wide-input buck-boost charge pump regulator with an integrated watchdog timer in a 16-pin MSOP package. It accepts 2.7 V to 38 V input and delivers a regulated output suitable for mixed-signal systems requiring both buck and boost conversion. The watchdog feature adds system health monitoring without a separate supervisor IC.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- LTC3246IMSE#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $5.1500(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTC3246IMSE#PBF?
- Wide 2.7 V to 38 V input range spanning single-cell Li-Ion to automotive 24 V bus rails
- Integrated buck-boost charge pump topology maintains regulated output above and below input voltage
- Built-in watchdog timer eliminates the need for a separate supervisor IC in MCU-based designs
- 16-pin MSOP package in a compact footprint for space-constrained mixed-signal boards
- Voltage-mode control with low quiescent current for efficient always-on power management
What is LTC3246IMSE#PBF used for?
The LTC3246IMSE#PBF is used in industrial handheld instruments and automotive telematics modules where the input supply can vary from a discharged 3 V battery to a 36 V vehicle transient, requiring uninterrupted regulated output throughout that range. Its charge pump topology makes it inductorless, simplifying PCB layout in RF-sensitive designs where switching inductors introduce unwanted EMI near antenna circuits. The integrated watchdog timer makes it an efficient choice for embedded MCU systems that need power regulation and brownout reset monitoring combined in a single compact device.
What are the specifications of LTC3246IMSE#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1667 |
| YTEOL | 10 |
| Analog IC - Other Type | SWITCHED CAPACITOR CONVERTER |
| Control Mode | VOLTAGE-MODE |
| Input Voltage-Max | 38V |
| Input Voltage-Min | 2.7V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 0.5A |
| Output Voltage-Max | 5V |
| Output Voltage-Min | 2.5V |
| Output Voltage-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP16,.19,20 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the LTC3246IMSE#PBF datasheet?
LTC3246IMSE#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTC3246IMSE#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LTC3246IMSE#PBF support and how does the buck-boost topology handle input-output crossover?
The LTC3246IMSE#PBF accepts 2.7 V to 38 V input, seamlessly transitioning between buck mode when input exceeds output and boost mode when input falls below output. This automatic crossover maintains a stable regulated output voltage with no interruption, which is critical for systems powered by batteries that discharge from 4.2 V to 2.7 V while needing a fixed 3.3 V output.
What is the watchdog timeout period of the LTC3246IMSE#PBF and how does it interface with a microcontroller?
The watchdog timer timeout is set by an external capacitor on the WDT pin; typical configurations use 100 nF for approximately 1.6 s timeout. The MCU must toggle the watchdog input pin within this window, or the device asserts a reset output lasting 200 ms, rebooting the processor. This hardware watchdog is independent of the power conversion function, ensuring reset occurs even if the software is frozen while the supply remains valid.
Why is the LTC3246IMSE#PBF charge pump topology preferred over an inductor-based regulator in RF and communication designs?
Charge pump regulators transfer energy using capacitors rather than inductors, eliminating the magnetic field and switching-node voltage spikes that inductor-based converters inject into nearby PCB traces. For RF transceivers and GPS receivers sensitive to conducted and radiated EMI above 100 kHz, a charge pump supply reduces noise floor degradation by 10 dB to 20 dB compared to inductor-based switchers operating at similar frequencies.
How does the LTC3246IMSE#PBF behave when powering a 5 V system from a 12 V automotive battery that can droop to 6 V during cranking?
During normal 12 V operation the device regulates in buck mode, and when the battery droops to 6 V during engine cranking the topology automatically switches to boost mode to maintain the 5 V output. This seamless transition keeps the microcontroller and sensors powered continuously through start-stop events without requiring a large hold-up capacitor, reducing system cost and PCB area compared to solutions that use a separate pre-charge capacitor bank.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $11.6200 | $11.62 |
| 10+ | $7.9630 | $79.63 |
| 19+ | $6.8300 | $129.77 |
| 500+ | $6.1000 | $3050.00 |
| 1000+ | $5.1500 | $5150.00 |
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