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
- Designed for automotive applications
- Junction temperature range –40°C to +150°C
- Protection features: thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, hiccup short-circuit protection
- 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:
- LMR36015/06-Q1 (60 V, 0.6 A or 1.5 A)
- LMR33620/30-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
- Small, 2-mm × 3-mm VQFN package with wettable flanks
- Low power dissipation across load spectrum
- 93% efficiency at 400 kHz (12VIN, 5VOUT, 1A)
- Increased light load efficiency in PFM
- Low operating quiescent current of 24 µA
- Optimized 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
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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, up to of 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.
The LMR34215-Q1 is in a HotRod™ package which enables low EMI, higher efficiency, and the smallest package to die ratio. The device requires few external components and has a pinout designed for simple PCB layout. The small solution size and feature set of the LMR34215-Q1 are designed to simplify implementation for a wide range of end equipment.
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. A) | Oct. 03, 2019 |
| Selection guides | 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 guides | LMR34206 and LMR34215 EVM User's Guide | Sep. 26, 2019 | |
| User guides | 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
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