Packaging information
| Package | Pins VQFN-HR (RPE) | 9 |
| Operating temperature range (°C) -40 to 150 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the LMR43620-Q1
- AEC-Q100-qualified for automotive
applications:
- Temperature grade 1: –40°C to +125°C, TA
- Functional Safety-Capable
- Greater than 85%
efficiency at 1mA
- 1.2µA total non-switching IQ at 13.5VIN, fixed 3.3VOUT
- Miniature design size and low component cost
- 2mm × 2mm HotRod™ package with wettable flanks
- Internal compensation
- Optimized for ultra-low EMI requirements
- Spread spectrum reduces peak emissions
- Meets CISPR25 Class 5 standard
- Pin selectable FPWM mode for constant frequency at light loads with MODE/SYNC pin
- FSW synchronization with MODE/SYNC pin
- Designed for automotive applications
- –40°C to +150°C junction temperature range
- Supports 42V automotive load dump
- Supports 3VIN for automotive cold crank
- Adjustable up to 95% of VIN, 3.3V and 5V fixed VOUT options available
- Designed for scalable power supplies
- 200kHz to 2.2MHz (RT pin) adjustable FSW
- Pin compatible with:
- LMR36506-Q1 (65V, 600mA)
- LMR36503-Q1 (65V, 30mA)
Description for the LMR43620-Q1
The LMR436x0-Q1 is the industry smallest 36V, 2A, and 1A synchronous step-down DC/DC converters in a 2mm × 2mm HotRod package. This easy-to-use converter supports a wide input voltage range of 3.0V to 36V with transients up to 42V.
The LMR43620-Q1 is specifically designed to meet low standby power requirements for always on, automotive applications. Auto mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of 1.5µA at 13.5VIN and high light load efficiency. A seamless transition between PWM and PFM modes along with very low MOSFET ON resistances provide exceptional efficiency across the entire load range.
The control architecture and feature set are designed for an ultra-small design size. The device uses peak current mode control to minimize output capacitance. The LMR436x0-Q1 minimizes input filter size by using dual random spread spectrum, a low-EMI HotRod package, and an optimized pinout. The MODE/SYNC and RT pin variants can be used to set or synchronize the frequency between 200kHz and 2.2MHz to avoid noise sensitive frequency bands.
The rich feature set of the LMR436x0-Q1 is designed to simplify implementation for a wide range of automotive end equipments.