Overview
The LM5088MH-1/NOPB is a wide input range non-synchronous buck controller produced by Texas Instruments. This controller is designed to implement efficient high-voltage step-down converters using a minimal number of external components. It operates over an ultra-wide input voltage range of 4.5 V to 75 V and is suitable for various applications requiring the efficient step-down of high, unregulated input voltages. The LM5088MH-1/NOPB features peak current mode control with an emulated current ramp, which reduces noise sensitivity and allows reliable control of very small duty cycles necessary in high input voltage and low output voltage applications.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 4.5 | - | 75 | V |
| Output Voltage Range (VOUT) | 1.205 | - | 70 | V |
| Switching Frequency Range | 50 kHz | - | 1 MHz | - |
| Maximum Duty Cycle | - | - | 100 % | - |
| Operating Temperature Range | -40 | - | 125 | °C |
| Quiescent Current (IQ) | - | 3.8 mA | - | - |
| Package Type | - | - | HTSSOP (16-pin) | - |
| ESD Classification | - | - | HBM Level 2, CDM Level C5 | - |
Key Features
- Ultra-wide input voltage range from 4.5 V to 75 V
- Peak current mode control with emulated current ramp for reduced noise sensitivity
- Programmable switching frequency from 50 kHz to 1 MHz
- Adjustable output voltage with 1.5% feedback reference accuracy
- Spread spectrum EMI reduction (LM5088-1)
- Hiccup timer for overload protection (LM5088-2)
- Low IQ shutdown and standby modes
- High duty cycle ratio feature for reduced dropout voltage
- High voltage, low dropout bias regulator
- Thermal shutdown protection
- Tri-level enable input for shutdown and standby modes
- Soft start and oscillator synchronization capability
Applications
- Automotive infotainment systems
- Automotive USB accessory adapters
- Industrial DC-DC bias and motor drivers
- Telecom and industrial power supplies
Q & A
- What is the input voltage range of the LM5088MH-1/NOPB?
The input voltage range is from 4.5 V to 75 V.
- What is the switching frequency range of the LM5088MH-1/NOPB?
The switching frequency is programmable from 50 kHz to 1 MHz.
- What are the key features of the LM5088MH-1/NOPB for EMI reduction?
The LM5088-1 version provides a ±5% frequency dithering function to reduce conducted and radiated EMI.
- How does the LM5088MH-1/NOPB protect against overloads?
The LM5088-2 version includes a hiccup timer for overload protection.
- What is the operating temperature range of the LM5088MH-1/NOPB?
The operating temperature range is from -40°C to +125°C.
- What package type is the LM5088MH-1/NOPB available in?
The device is available in a 16-pin HTSSOP package.
- Does the LM5088MH-1/NOPB have thermal shutdown protection?
- Can the LM5088MH-1/NOPB be synchronized with an external oscillator?
- What is the quiescent current (IQ) of the LM5088MH-1/NOPB?
The typical quiescent current is 3.8 mA.
- Is the LM5088MH-1/NOPB RoHS compliant?
