Settings
Fast Delivery
Free Shipping
Incoterms
Payment Types
Marketplace Product
LMR43620/-Q1 Low IQ Synchronous Buck Regulator
Texas Instruments' regulator simplifies implementation for a wide range of industrial applications
Texas Instruments' LMR43620 and LMR43620-Q1 (automotive) are ultra-small 36 V, 2 A, and 1 A synchronous step-down DC/DC converters in a 2 mm x 2 mm HotRod™ package. These easy-to-use converters support a wide input voltage range of 3.0 V to 36 V with transients up to 42 V.
The LMR43620-Q1 is designed to meet low standby power requirements for always-on automotive applications. The auto mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of 1.5 µA at 13.5 VIN and high light-load efficiency. A seamless transition between the PWM and PFM modes with very low MOSFET ON-resistance provides exceptional efficiency across the load range.
The control architecture and feature set are optimized for an ultra-small solution size. The devices use peak-current-mode control to minimize output capacitance. The LMR43620-Q1 minimizes the input filter size by utilizing a dual-random spread spectrum, low-EMI HotRod package, and optimized pinout. The MODE/SYNC and RT pin variants can set or synchronize the frequency between 200 kHz and 2.2 MHz to avoid noise-sensitive frequency bands. The rich feature sets of the devices are designed to simplify implementation for a wide range of industrial and automotive end equipment (LMR43620-Q1) applications.
- Miniature solution size and low component cost:
- Package: 2 mm x 2 mm HotRod with wettable flanks
- Internal compensation
- Optimized for ultra-low EMI requirements:
- Spread spectrum reduces peak emissions (LMR43620-Q1)
- Meets CISPR25 Class 5 standard (LMR43620-Q1)
- Pin-selectable FPWM mode for constant frequency at light loads with a MODE/SYNC pin
- FSW synchronization with a MODE/SYNC pin
- Suitable for scalable power supplies:
- Adjustable FSW: 200 kHz to 2.2 MHz (RT pin)
- Pin compatible (LMR43620-Q1): LMR36506-Q1 (65 V, 600 mA) and LMR36503-Q1 (65 V, 300 mA)
- Pin compatible (LMR43620): LMR36506 (65 V, 600 mA) and LMR36503 (65 V, 300 mA)
- Functional safety-capable (LMR43620-Q1): documentation available to aid functional safety system design
- Designed for automotive applications (LMR43620-Q1):
- Junction temperature range: -40°C to +150°C
- Supports 42 V automotive load dump
- Supports 3 VIN for automotive cold cranks
- Adjustable up to 95% of VIN, 3.3 V and 5 V fixed VOUT options available
- Designed for industrial applications (LMR43620):
- Junction temperature range: -40°C to +150°C
- Supports 42 V transients
- Supports 3 VIN minimum
- Adjustable up to 95% of VIN, 3.3 V and 5 V fixed VOUT options available
- Efficiency (LMR43620): 89% at 1 mA, 1.2 µA IQ at 24 VIN, 3.3 fixed VOUT
- Efficiency (LMR43620-Q1): >85% at 1 mA, 1.2 µA total non-switching IQ at 13.5 VIN, fixed 3.3 VOUT
- AEC-Q100-qualified for automotive applications (LMR43620-Q1):
- Temperature Grade 1: -40°C to +125°C, TA
- Advanced driver assistance systems: radar ECU
- Body electronics and lighting
- Infotainment and clusters: head-units and eCall
LMR43620/-Q1 Low IQ Synchronous Buck Regulators
| Image | Manufacturer Part Number | Description | Output Configuration | Topology | Output Type | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|---|---|
 |  | LMR43620MSC3RPERQ1 | IC REG BUCK ADJ/3.3V 2A 9VQFN | Positive | Buck | Adjustable (Fixed) | 311 - Immediate | $31.36 | View Details |
Evaluation Board
| Image | Manufacturer Part Number | Description | Outputs and Type | Power - Output | Voltage - Output | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|---|---|
|  | LMR43620MQ3EVM-2M | EVAL BOARD FOR LMR43620Q1 | 1 Non-Isolated Output | - | 3.3V | 5 - Immediate | $484.04 | View Details |
Hong Kong, China