Overview
The LM5022MMX, produced by Texas Instruments, is a high-voltage, low-side, N-channel MOSFET controller. It is specifically designed for use in boost and SEPIC regulators, making it ideal for various power conversion applications. The device includes a comprehensive set of features that facilitate the implementation of single-ended primary topologies. It operates over a wide input voltage range of 6 V to 60 V and can continue to function down to 3 V after start-up. The LM5022MMX is known for its high-speed capability, with an oscillator frequency range up to 2.2 MHz and total propagation delays less than 100 ns.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 6 V to 60 V (operates down to 3 V after start-up) | V |
| Peak MOSFET Gate Driver Current | 1 A | A |
| Duty Cycle Limit | 90% | % |
| Operating Temperature Range | -40°C to 125°C | °C |
| Oscillator Frequency Range | Up to 2.2 MHz | Hz |
| Propagation Delays | ns | |
| Package Type | 10-Pin VSSOP | |
| Thermal Shutdown Threshold | 165°C | °C |
| Thermal Shutdown Hysteresis | 25°C | °C |
Key Features
- Internal 60-V start-up regulator
- 1-A Peak MOSFET gate driver
- Programmable UVLO with hysteresis
- Cycle-by-cycle current limit
- External synchronizable (AC-coupled)
- Single resistor oscillator frequency set
- Slope compensation
- Adjustable soft start
- Error amplifier and precision reference
- Line undervoltage lockout
- Thermal shutdown
Applications
- Boost converters
- SEPIC converters
- Non-isolated boost regulators, particularly in automotive applications
Q & A
- What is the input voltage range of the LM5022MMX?
The LM5022MMX operates over an input voltage range of 6 V to 60 V and can continue to function down to 3 V after start-up.
- What is the peak current capability of the MOSFET gate driver in the LM5022MMX?
The MOSFET gate driver can source and sink a peak current of 1 A.
- What is the duty cycle limit of the LM5022MMX?
The duty cycle limit is 90%.
- Can the LM5022MMX be synchronized with an external clock?
- What is the thermal shutdown threshold of the LM5022MMX?
The thermal shutdown threshold is 165°C, with a hysteresis of 25°C.
- What type of package is the LM5022MMX available in?
The LM5022MMX is available in a 10-Pin VSSOP package.
- Does the LM5022MMX have slope compensation?
- How is the oscillator frequency set in the LM5022MMX?
The oscillator frequency is set using a single external resistor connected between the RT/SYNC and GND pins.
- What is the purpose of the internal error amplifier in the LM5022MMX?
The internal error amplifier is used for loop compensation and can be configured as an open-drain output or disabled if not needed.
- Does the LM5022MMX have cycle-by-cycle current limiting?
