LT3970IDDB-5#TRMPBF Analog Devices Integrated Circuit (Small Outline No-lead) In Stock
Analog Devices LT3970IDDB-5#TRMPBF is an automotive-grade DC-DC step-down regulator accepting 4.2 V to 40 V input and providing a fixed 5 V output at up to 0.35 A in a 10-pin DFN package. Current-mode PWM control ensures stable regulation across wide input ranges. Available from stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline No-lead
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- LT3970IDDB-5#TRMPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.6100(MOQ 19)
- 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 LT3970IDDB-5#TRMPBF?
- Wide 4.2 V to 40 V input voltage range accommodating automotive battery voltages including cold-crank (4.2 V) and load-dump (40 V) conditions
- Fixed 5 V output at 0.35 A with current-mode PWM control for fast transient response and loop stability
- Automotive-grade qualification supporting reliable operation across -40°C to 125°C temperature range in vehicle electronics
- Compact 10-pin DFN EP package with exposed pad enabling efficient thermal dissipation in space-constrained automotive PCBs
What is LT3970IDDB-5#TRMPBF used for?
The LT3970IDDB-5#TRMPBF is designed for automotive always-on power rails where the wide 4.2 V to 40 V input range tolerates cold-crank battery drop and load-dump transients. Its fixed 5 V output at 350 mA supplies microcontrollers, sensors, and interface ICs in automotive body control modules, TPMS nodes, and instrument cluster boards. The small DFN package and current-mode control minimize external component count in automotive power management subsystems.
What are the specifications of LT3970IDDB-5#TRMPBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1722 |
| YTEOL | 9 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 4.2V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-N10 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 0.865A |
| Output Voltage-Max | 5.06V |
| Output Voltage-Min | 4.875V |
| Output Voltage-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 2640kHz |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline No-lead |
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 | Thailand |
Where can I find the LT3970IDDB-5#TRMPBF datasheet?
LT3970IDDB-5#TRMPBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT3970IDDB-5#TRMPBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does LT3970IDDB-5#TRMPBF handle the 40 V load-dump transient common in automotive 12 V battery systems?
The LT3970IDDB-5#TRMPBF accepts input voltages up to 40 V, safely absorbing automotive load-dump transients that can spike battery rails from 12 V to 36 V or more. The current-mode PWM control maintains stable 5 V output regulation during these transients, protecting downstream 5 V microcontrollers and sensors without external clamping diodes in most automotive designs.
What output current does LT3970IDDB-5#TRMPBF supply, and which automotive loads can it power directly?
LT3970IDDB-5#TRMPBF delivers up to 350 mA at a fixed 5 V output from a 4.2 V to 40 V input. At 350 mA, it can directly supply a microcontroller drawing 100 mA to 200 mA, plus supporting peripherals such as CAN transceivers, temperature sensors, and LEDs, covering the power budget of typical automotive body control module logic subsystems.
For an automotive TPMS node, how does the 10-pin DFN package of LT3970IDDB-5#TRMPBF minimize PCB space?
The 10-pin DFN package with exposed pad (EP) of LT3970IDDB-5#TRMPBF measures approximately 3 mm x 2 mm, one of the smallest footprints available for a 40 V automotive buck regulator. In a TPMS sensor node where total PCB area is often less than 2 cm², this compact package leaves room for the RF transceiver, pressure sensor, and battery management IC.
When would LT3970IDDB-5#TRMPBF be selected over a linear regulator for automotive 12 V to 5 V conversion?
LT3970IDDB-5#TRMPBF is preferred over a linear regulator when input voltage exceeds 8 V, because at 12 V input a linear regulator would dissipate 2.45 W at 350 mA (a 7 V drop), versus the buck regulator's roughly 0.5 W loss. This efficiency advantage reduces heat generation in enclosed automotive modules and extends component lifetime at 125°C operating temperatures.
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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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