LM5088MHX-2

• Product Introduction

peculiarity

LM5088Q is automotive-grade and AEC - Q100 qualified (-40°C to +125°C operating junction temperature) Analog current mode control Drive high-side external N-channel MOSFETs The ultra-wide input voltage range is from 4.5V to 75V Low IQ shutdown and standby mode High duty cycle reduces voltage difference ratio function Spread Spectrum EMI Reduction (LM5088 - 1) Burp Overload Protection Timer (LM5088-2) Adjustable output voltage from 1.205V 1.5% feedback reference accuracy Wide bandwidth error amplifier Single-resistor oscillator frequency setting Oscillator synchronization function Programmable soft start High voltage, low dropout bias regulator Thermal shutdown protection

illustrate

The LM5088 High Voltage Asynchronous Buck Controller has all the necessary features to achieve an efficient high voltage buck converter with minimal number of external components. The LM5088 can be configured to operate with an ultra-wide input voltage range of 4.5V to 75V. This easy-to-use controller, including a horizontally shifted gate driver, is capable of controlling an external N-channel buck switch. The control method is based on peak current mode control utilizing a simulated current ramp. The sensitivity of the pulse-width modulation circuit using analog control ramps to reduce noise allows for very small duty cycles necessary for reliable control in high input voltage/low output voltage applications. The LM5088 switches from 50 kHz to 1 MHz with programmable frequencies.

The LM5088 is available in two versions: the LM5088-1 provides A+/-5% frequency jitter to reduce conducted and radiated EMI, while the LM5088-2 provides a versatile overload protection restart timer. Other features include a low-dropout bias regulator, three-level enable input control shutdown and standby mode, soft-start, and oscillator synchronization functions. The device is available in a thermally enhanced TSSOP - 16EP pin package.