Overview
The LM5122ZPWPR, produced by Texas Instruments, is a high-performance synchronous boost controller designed for high-efficiency synchronous boost regulator applications. This controller features a wide input voltage range of 3 V to 65 V, with a start-up voltage requirement of 4.5 V. It supports output voltages up to 100 V and includes bypass operation where VOUT equals VIN. The LM5122ZPWPR utilizes peak-current-mode control, providing inherent line feedforward and ease of loop compensation. It is equipped with robust 3-A integrated gate drivers and adaptive dead-time control, enhancing efficiency and reliability. The device is available in 20 or 24-pin HTSSOP packages with an exposed pad for improved thermal dissipation.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage | 3 V (4.5 V for Start-Up) | - | 65 V | V |
| Output Voltage | - | - | 100 V | V |
| Switching Frequency | - | - | 1 MHz | Hz |
| Gate Driver Current | - | - | 3 A | A |
| Operating Temperature | -40°C | - | 125°C | °C |
| Shutdown Quiescent Current | 9 μA | - | - | μA |
| Package Type | - | - | 20 or 24-pin HTSSOP | - |
Key Features
- Wide input voltage range: 3 V to 65 V (4.5 V for start-up)
- Output voltage up to 100 V with bypass operation (VOUT = VIN)
- 1.2-V reference with ±1% accuracy
- Free-run and synchronizable switching up to 1 MHz
- Peak-current-mode control with robust 3-A integrated gate drivers and adaptive dead-time control
- Optional diode-emulation mode
- Programmable cycle-by-cycle current limit and hiccup-mode overload protection
- Programmable line UVLO and soft start
- Thermal shutdown protection and low shutdown quiescent current: 9 μA
- Programmable slope compensation and skip-cycle mode to reduce standby power
- Allows external VCC supply and inductor DCR current sensing capability
- Multi-phase capability and thermally enhanced 20 or 24-pin HTSSOP package
Applications
- 12-V, 24-V, and 48-V power systems
- Automotive start-stop systems
- Audio power supplies
- High-current boost power supplies
- Industrial, automotive, telecommunications, and portable electronics requiring efficient power boost conversion
Q & A
- What is the input voltage range of the LM5122ZPWPR?
The input voltage range is 3 V to 65 V, with a start-up voltage requirement of 4.5 V.
- What is the maximum output voltage supported by the LM5122ZPWPR?
The maximum output voltage is up to 100 V.
- What is the switching frequency range of the LM5122ZPWPR?
The switching frequency can be programmed up to 1 MHz.
- Does the LM5122ZPWPR support multi-phase operation?
Yes, it supports multi-phase capability.
- What is the operating temperature range of the LM5122ZPWPR?
The operating temperature range is -40°C to 125°C.
- What type of control method does the LM5122ZPWPR use?
The LM5122ZPWPR uses peak-current-mode control.
- Does the LM5122ZPWPR have thermal shutdown protection?
Yes, it includes thermal shutdown protection.
- Can the LM5122ZPWPR be synchronized to an external clock?
Yes, it supports free-run and synchronizable switching.
- What is the shutdown quiescent current of the LM5122ZPWPR?
The shutdown quiescent current is 9 μA.
- What package types are available for the LM5122ZPWPR?
The device is available in 20 or 24-pin HTSSOP packages.
