Automotive 36-V, 4-A synchronous converter in an enhanced EMI QFN package with wettable flank
LM60440-Q1
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
- Documentation available to aid functional safety system design
- Low EMI and switching noise
- Meets CISPR25 class 5 standard
- Enhanced QFN package minimizes parasitic inductance and switch node ringing
- Configured for automotive applications
- Standard QFN footprint: single large thermal pad and all pins accessible from perimeter
- Pin compatible variants:
- LM60440-Q1 (36 V, 4 A)
- LM60430-Q1 (36 V, 3 A)
- Junction temperature range –40°C to +150°C
- ±1.5% total output regulation accuracy
- Frequency: 400 kHz
- Output voltage range: 1 V to 24 V
- High efficiency power conversion at all loads
- Peak efficiency > 95%
- 90% PFM efficiency at 10-mA, 12 VIN, 5 VOUT
- Low operating quiescent current of 25 µA
- Create a custom design using the LM60440-Q1 with the WEBENCH® Power Designer
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Description
The LM604x0-Q1 automotive-qualified regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for automotive applications. The LM60430-Q1 drives up to 3-A of load current, and the LM60440-Q1 is industry’s smallest 4A step-down converter.
The LM604x0-Q1 is available in an ultra-miniature WQFN package with wettable flanks and a standard QFN pin-out with a thermal pad to enhance thermal performance. This enhanced QFN package features extremely small parasitic inductance and resistance, enabling very high efficiency while minimizing switch node ringing and dramatically reducing EMI.
The LM604x0-Q1 uses peak-current-mode control to automatically fold back frequency at light load to ensure exceptional efficiency across the entire load range. The low power dissipation paired with a thermally optimized QFN package enables a power dense solution size. In addition the device requires few external components and has a pinout designed for simple PCB layout. The small solution size and feature set of the LM604x0-Q1 are designed to simplify implementation for a wide range of end equipment.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | LM604x0-Q1 3.8-V to 36-V, 3-A, and 4-A Ultra-Small Synchronous Step-Down Converter datasheet (Rev. A) | Jun. 17, 2020 |
| Application notes | LM604x0-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | Oct. 01, 2020 | |
| More literature | LM60440AQEVM EU Declaration of Conformity (DoC) | Sep. 08, 2020 | |
| Application notes | Enhanced HotRod QFN Package: Achieving Low EMI Performance in Industry’s Smalles | Jun. 26, 2020 | |
| User guides | LM60440AQEVM User's Guide | Oct. 08, 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
- Tested against CISPR 25 class 5 standards
- EMI enhanced QFN package
- Thermally optimized for high power density
- Small solution size with low BOM count
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 |
|---|---|---|
| WQFN-HR (RPK) | 13 | View options |
Ordering & quality
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