LM5088MH-2

• Product introduction

peculiarity

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

illustrate

The LM5088 high voltage nonsynchronous buck controller has all the necessary features to enable an efficient high voltage buck converter with minimal external component count. The LM5088 can be configured to operate over an ultra-wide input voltage range of 4.5V to 75V. This easy-to-use controller includes a horizontally shifted gate driver capable of controlling an external N-channel buck switch. The control method is based on peak current mode control utilizing an analog current ramp. The use of analog control ramps reduces the sensitivity of the pulse-width modulation circuit of noise, allowing for very small duty cycles necessary for reliable control in high input voltage/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 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, a three-level enable input to control shutdown and standby modes, soft-start, and oscillator synchronization. The device is available in a thermally enhanced TSSOP-16EP pin package.