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Product Descriptions

The LM5088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using a minimum number of external components. The LM5088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 75 V. This easy-to-use controller includes a level-shifted gate driver capable of controlling an external N-channel buck switch. The control method is based upon peak current mode control utilizing an emulated current ramp. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage and low output voltage applications. The LM5088 switching frequency is programmable from 50 kHz to 1 MHz.

The LM5088 is available in two versions: The LM5088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI, while the LM5088-2 provides a versatile restart timer for overload protection. Additional features include a low dropout bias regulator, tri-level enable input to control shutdown and standby modes, soft start, and oscillator synchronization capability. The device is available in a thermally enhanced 16-pin HTSSOP package.

Product Features

? AEC-Q100 qualified with the following results:

– Device temperature grade 1: –40°C to +125°C ambient operating temperature range

– Device HBM ESD classification level 2

– Device CDM ESD classification level C5

? Emulated current mode control

? Drives external high-side N-channel MOSFET

? Ultra-wide input voltage range from 4.5 V to 75 V

? Low IQ shutdown and standby modes

? High duty cycle ratio feature for reduced dropout voltage

? Spread spectrum EMI reduction (LM5088-1)

? Hiccup timer for overload protection (LM5088-2)

? Adjustable output voltage from 1.205 V with 1.5PERCENT feedback reference accuracy

? Wide bandwidth error amplifier

? Single resistor oscillator frequency setting

? Oscillator synchronization capability

? Programmable soft start

? High voltage, low dropout bias regulator

? Thermal shutdown protection

? 16-pin HTSSOP package

Product Applications

? Automotive infotainment

? Automotive USB accessory adapters

? Industrial DC-DC bias and motor drivers

Specifications

Actual product photos

Payment&Transportation

Official Certificate&Certificate

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