Overview
The LM46002 is a high-efficiency synchronous step-down DC/DC converter produced by Texas Instruments. This device is capable of driving up to 2 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 a low drop-out voltage in a compact solution size. The LM46002 is part of the SIMPLE SWITCHER family and is available in a 16-lead HTSSOP (PWP) package, making it suitable for a wide range of applications requiring high performance and reliability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3.5 to 60 | V |
| Output Current | Up to 2 | A |
| Switching Frequency Range | 200 kHz to 2.2 MHz (500 kHz default) | Hz |
| Quiescent Current in Regulation | 27 µA | A |
| Peak Inductor Current Limit | 3.6 to 5 | A |
| Thermal Shutdown Threshold | 160 °C | °C |
| Junction-to-Ambient Thermal Resistance | 38.9 °C/W | °C/W |
| Package Type | 16-lead HTSSOP (PWP) | - |
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 ceramic, polymer, tantalum, and aluminum capacitors
- Power-good flag
- Soft start into prebiased load with internal soft start (4.1 ms) and extendable soft-start time 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 is the default switching frequency of the LM46002?
The default switching frequency is 500 kHz, but it can be adjusted from 200 kHz to 2.2 MHz.
- 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 is the quiescent current in regulation for the LM46002?
The quiescent current in regulation is 27 µA.
- Does the LM46002 have thermal shutdown protection?
Yes, the LM46002 has overtemperature thermal shutdown protection with a threshold of 160 °C.
- Can the LM46002 be synchronized to an external clock?
Yes, the LM46002 can be synchronized to an external clock using the SYNC pin.
- What is the purpose of the power-good flag in the LM46002?
The power-good flag indicates when the output voltage is within the specified range and can be used with a pullup resistor to a logic rail or other DC voltage.
- How can the soft-start time be extended in the LM46002?
The soft-start time can be extended by connecting an external capacitor to the SS/TRK pin.
