Overview
The LM46001PWPR is a high-efficiency synchronous step-down DC-DC converter produced by Texas Instruments. This device is capable of driving up to 1 A of load current from an input voltage ranging from 3.5 V to 60 V. It is designed to provide exceptional efficiency, output accuracy, and dropout voltage in a compact solution size. The LM46001 is part of a family that includes 0.5-A and 2-A load current options in pin-to-pin compatible packages, making it versatile for various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage (VIN to PGND) | 3.5 | 60 | V | |
| Output Voltage (VOUT) | 1 | 28 | V | |
| Output Current (IOUT) | 0 | 1 | A | |
| Operating Junction Temperature (TJ) | -40 | 125 | °C | |
| Switching Frequency (Default) | 500 | kHz | ||
| Switching Frequency (Adjustable Range) | 200 | 2200 | kHz | |
| Quiescent Current in Regulation | 24 | µA | ||
| High-Side MOSFET ON-Resistance | 419 | mΩ | ||
| Low-Side MOSFET ON-Resistance | 231 | mΩ | ||
| Package Type | HTSSOP (16) | |||
| Package Size | 6.60 mm × 5.10 mm × 1.2 mm |
Key Features
- High Efficiency at Light Load (DCM and PFM)
- Meets EN55022/CISPR 22 EMI standards
- Integrated Synchronous Rectification
- Adjustable Switching Frequency: 200 kHz to 2.2 MHz (500 kHz default)
- Frequency Synchronization to External Clock
- Internal Compensation
- Stable With Many Combinations of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
- Power-Good Flag
- Soft Start into Pre-Biased Load
- Internal Soft Start: 4.1 ms, Extendable by External Capacitor
- Output Voltage Tracking Capability
- Precision Enable to Program System UVLO
- Output Short-Circuit Protection With Hiccup Mode
- Overtemperature Thermal Shutdown Protection
Applications
- Industrial Power Supplies
- Telecommunications Systems
- Sub-AM Band 12-V and 24-V Automotive Systems
- Commercial Vehicle Power Supplies
- General Purpose Wide VIN Regulation
- High Efficiency Point-Of-Load Regulation
Q & A
- What is the input voltage range of the LM46001? The input voltage range is from 3.5 V to 60 V.
- What is the maximum output current of the LM46001? The maximum output current is 1 A.
- What is the default switching frequency of the LM46001? The default switching frequency is 500 kHz.
- Can the switching frequency be adjusted? Yes, the switching frequency can be adjusted from 200 kHz to 2.2 MHz.
- Does the LM46001 have built-in EMI compliance? Yes, it meets EN55022/CISPR 22 EMI standards.
- What type of package is the LM46001 available in? The LM46001 is available in a 16-lead HTSSOP package.
- What is the quiescent current in regulation for the LM46001? The quiescent current in regulation is 24 µA.
- Does the LM46001 have thermal protection? Yes, it includes overtemperature thermal shutdown protection.
- Can the soft-start time be extended? Yes, the soft-start time can be extended by using an external capacitor.
- What is the purpose of the power-good flag? The power-good flag indicates when the output voltage is within the specified range.
