Overview
The LM43603PWP is a synchronous step-down DC-DC converter produced by Texas Instruments. This regulator is designed to drive up to 3 A of load current from an input voltage ranging from 3.5 V to 36 V (with an absolute maximum of 42 V). It offers exceptional efficiency, output accuracy, and dropout voltage in a compact solution size. The LM43603 is part of an extended family that includes 0.5-A, 1-A, and 2-A load current options, all available in pin-to-pin compatible packages. The device employs peak current mode control for simple control loop compensation and cycle-by-cycle current limiting, making it a versatile and easy-to-use platform for various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 3.5 V to 36 V (42 V abs max) |
| Output Current | Up to 3 A |
| Quiescent Current in Regulation | 27 µA |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | HTSSOP (PWP) 16 pins, VSON-16 with wettable flanks |
| Package Dimensions (HTSSOP) | 5.1 mm × 6.6 mm × 1.2 mm |
| Adjustable Frequency Range | 200 kHz to 2.2 MHz (500 kHz default) |
| Thermal Shutdown Threshold | 160°C |
Key Features
- High Efficiency at Light Load (DCM and PFM)
- Meets EN55022/CISPR 22 EMI standards
- Integrated Synchronous Rectification
- Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz default)
- Frequency Synchronization to External Clock
- Internal Compensation
- Stable with Almost Any Combination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
- Power-Good Flag
- Soft Start into a Pre-Biased Load
- Internal Soft-Start: 4.1 ms, Extendable Soft-Start Time by External Capacitor
- Output Voltage Tracking Capability
- Precision Enable to a Program System UVLO
- Output Short Circuit Protection with Hiccup Mode
- Overtemperature Thermal Shutdown Protection
Applications
- Industrial Power Supplies
- Telecommunications Systems
- Sub-AM Band Automotive Systems
- General Purpose Wide VIN Regulation
- High Efficiency Point-Of-Load Regulation
Q & A
- What is the input voltage range of the LM43603PWP?
The input voltage range is from 3.5 V to 36 V, with an absolute maximum of 42 V.
- What is the maximum output current of the LM43603PWP?
The maximum output current is up to 3 A.
- What is the quiescent current in regulation for the LM43603PWP?
The quiescent current in regulation is 27 µA.
- What are the package options for the LM43603PWP?
The device is available in HTSSOP (PWP) 16 pins and VSON-16 packages with wettable flanks.
- Does the LM43603PWP meet any EMI standards?
Yes, it meets EN55022/CISPR 22 EMI standards.
- What is the adjustable frequency range of the LM43603PWP?
The adjustable frequency range is from 200 kHz to 2.2 MHz, with a default frequency of 500 kHz.
- Does the LM43603PWP have thermal shutdown protection?
Yes, it has overtemperature thermal shutdown protection with a threshold of 160°C.
- What types of capacitors is the LM43603PWP stable with?
The device is stable with almost any combination of ceramic, polymer, tantalum, and aluminum capacitors.
- Does the LM43603PWP have a power-good flag feature?
Yes, it includes a power-good flag feature.
- Can the soft-start time of the LM43603PWP be extended?
Yes, the soft-start time can be extended by using an external capacitor.
- What are some common applications for the LM43603PWP?
Common applications include industrial power supplies, telecommunications systems, sub-AM band automotive systems, general purpose wide VIN regulation, and high efficiency point-of-load regulation.
