Overview
The LM46002PWPT from Texas Instruments is a high-efficiency, synchronous step-down DC/DC converter designed to drive up to 2 A of load current from an input voltage ranging from 3.5 V to 60 V. This device is part of the SIMPLE SWITCHER family and is known for its ease of use and high performance. The LM46002 offers exceptional efficiency, output accuracy, and a low drop-out voltage, making it suitable for a wide range of applications. It is available in a 16-lead HTSSOP (PWP) package with a compact size of 6.6 mm × 5.1 mm × 1.2 mm, facilitating simple and optimal PCB layout.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 3.5 | - | 60 | V |
| Output Current | - | - | 2 | A |
| Switching Frequency Range | 200 kHz | 500 kHz | 2.2 MHz | - |
| Quiescent Current in Regulation | - | 27 µA | - | - |
| High-Side MOSFET ON-Resistance | - | 210 mΩ | - | - |
| Low-Side MOSFET ON-Resistance | - | 110 mΩ | - | - |
| Thermal Shutdown Threshold | - | 160 °C | - | - |
| Package Type | - | 16-lead HTSSOP (PWP) | - | - |
| Package Size | - | 6.6 mm × 5.1 mm × 1.2 mm | - | - |
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 prebiased 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 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 LM46002?
The input voltage range of the LM46002 is from 3.5 V to 60 V.
- What is the maximum output current of the LM46002?
The LM46002 can drive up to 2 A of load current.
- What are the switching frequency options for the LM46002?
The switching frequency range is from 200 kHz to 2.2 MHz, with a default frequency of 500 kHz.
- Does the LM46002 meet any specific EMI standards?
Yes, the LM46002 meets EN55022/CISPR 22 EMI standards.
- What type of package is the LM46002 available in?
The LM46002 is available in a 16-lead HTSSOP (PWP) package.
- What are the key protection features of the LM46002?
The key protection features include thermal shutdown, VCC undervoltage lockout, cycle-by-cycle current limit, and output short-circuit protection with hiccup mode.
- Can the LM46002 be synchronized with an external clock?
Yes, the LM46002 can be synchronized with an external clock using the SYNC pin.
- What is the quiescent current in regulation for the LM46002?
The quiescent current in regulation is 27 µA.
- Does the LM46002 support soft-start and tracking capabilities?
Yes, the LM46002 supports internal soft start and output voltage tracking capabilities.
- What are some typical applications for the LM46002?
Typical applications include industrial power supplies, telecommunications systems, automotive systems, and high-efficiency point-of-load regulation.
