LM63625 Step-down Voltage Converter: Datasheet, Price, Circuit

LM63625 Pinout

Symbol

LM63625 Symbol

Footprint

LM63625 Footprint

3D Model

LM63625 3D Model

The LM63625 regulator is an easy-to-use, synchronous, step-down  DC /DC converter designed for rugged automotive applications. The LM63625 can drive up to 1.5-A or 2.5-A of load current from an input of up to 36 V. The converter has high light load efficiency and output accuracy in a small solution size. Features such as a RESET flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load improves efficiency while maintaining tight load regulation. Integration eliminates many external components and provides a pinout designed for a simple PCB layout. 

• AEC-Q100-Qualified for automotive applications
– Device temperature grade 1: –40°C to +125°C
ambient operating temperature
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• Supports automotive system requirements
– Input voltage range: 3.5 V to 36 V
– Short minimum on-time of 50 ns
– Good EMI performance
Pseudo-random spread spectrum
Compatible with  CISPR  25
– Low operating quiescent current of 23 µA
– Junction temperature range –40°C to +150°C
• High design flexibility
– Pin selectable VOUT: 3.3 V, 5 V, adjustable1 V to 20 V
– Pin compatible with LM63610/LM63635 (1A, 3.25 A)
– Pin selectable frequency: 400 kHz, 2.1 MHz, adjustable 250 kHz to 2200 kHz
– Pin selectable FPWM, AUTO, sync modes
– TSSOP: Thermally-enhanced package
– WSON: For space-constrained applications
• Small solution size
– As small as 10 mm x 10 mm for 2.5 A, 2.2 MHz with WSON package
– Highly integrated solution
– Low component count

• Automotive infotainment and cluster
• Automotive body electronics and lighting
• Automotive ADAS

The alternatives for LM63625:

• LM63610

• LM63615

• LM83615

The LM63625 is a synchronous peak-current-mode buck regulator that can be used in a wide range of automotive applications. Depending on the load, the regulator automatically shifts between PFM and  PWM  modes. The gadget switches to  PWM at a consistent switching frequency when under strong load. The mode switches to PFM with diode emulation at low loads, allowing DCM. This lowers the input supply current while maintaining high efficiency. The following features are included in the device:

• Selectable output voltage 

• Adjustable switching frequency 

• Forced PWM mode (FPWM) 

• Frequency synchronization

The RESET output makes system sequencing simple. Furthermore, compared to externally compensated regulators, internal compensation decreases design time and requires fewer external components. A functional block diagram shows below

LM63625 Functional Block Diagram

A typical application circuit for the LM63625 is shown in the diagram below. This gadget is made to work with a variety of external components and system settings. Internal compensation, on the other hand, is tuned for a specific range of external inductance and output capacitance.

LM63625 Example Application Circuit VIN= 12 V; Vouτ= 5 V, louτ= 2.5 A, fsw= 2.1 MHz

LM63625 Package