4.2-V to 42-V, 1.5-A ultra-small synchronous step-down converter
Product details
Parameters
Package | Pins | Size
Features
- AEC-Q100-qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, TA
- Functional Safety-Capable
- Designed for automotive applications
- Junction temperature range –40°C to +150°C
- 0.4-V dropout with 1.5-A load (typical)
- ±1.5% reference voltage tolerance
- 5-V fixed-output, adjustable output voltage options
- Suited for scalable power supplies
- Pin compatible with:
- LMR36015-Q1, LMR36006-Q1 (60 V, 0.6 A, or 1.5 A)
- LMR33630-Q1, LMR33620-Q1 (36 V, 2 A, or 3 A)
- 400-kHz, 2.1-MHz frequency options
- Pin compatible with:
- Integration reduces solution size and cost
- Small, 2-mm × 3-mm VQFN package with wettable flanks
- Few external components
- Low power dissipation across load spectrum
- 93% efficiency at 400 kHz (12 VIN, 5 VOUT, 1 A)
- Increased light load efficiency in PFM
- Low operating quiescent current of 24 µA
- Optmized for ultra low EMI requirements
- Meets CISPR25 class 5 standard
- Hotrod™ package minimizes switch node ringing
- Parallel input path minimizes parasitic inductance
- Spread spectrum reduces peak emissions
All trademarks are the property of their respective owners.
Description
The LMR34215-Q1 regulator is an easy-to-use, synchronous, step-down DC/DC converter. With integrated high-side and low-side power MOSFETs, output current is delivered over a wide input voltage range of 4.2 V to 42 V.
The LMR34215-Q1 uses peak-current-mode control to provide optimal efficiency and output voltage accuracy. Precision enable gives flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status eliminating the requirement for an external supervisor.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LMR34215-Q1 4.2-V to 42-V, 1.5-A Ultra-Small Synchronous Step-Down Converter datasheet (Rev. B) | Nov. 19, 2020 |
Functional safety information | LMR34215-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | Jan. 06, 2021 | |
Technical articles | Powering levels of autonomy: a quick guide to DC/DC solutions for SAE autonomy levels | Nov. 18, 2020 | |
Selection guide | Buck Converter Quick Reference Guide (Rev. A) | Mar. 31, 2020 | |
Technical articles | Optimizing flip-chip IC thermal performance in automotive designs | Dec. 11, 2019 | |
User guide | LMR34206 and LMR34215 EVM User's Guide | Sep. 26, 2019 | |
User guide | Automotive ADAS camera power supply reference design (Rev. A) | Aug. 22, 2019 | |
Technical articles | Minimize the impact of the MLCC shortage on your power application | Mar. 29, 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Integrated synchronous rectification
- Tested against CISPR 25 Class 5 standards
- Small solution size with low BOM count
- Short minimum on-time
Description
Features
- Inegrated synchronous rectification
- Low operating quiescent current
- High efficiency at light loads
- Short minimum on-time
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VQFN-HR (RNX) | 12 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.