LM25088QMHX-1

• LM25088Q 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
• Ultra-wide input voltage range from 4.5V to 42V
• _lowI Q shutdown and standby mode
• High duty cycle reduces voltage difference function
• Spread Spectrum EMI Reduction (LM25088 - 1)
• Hiccup Overload Protection Timer (LM25088 - 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 LM25088 high voltage nonsynchronous buck controller has all the necessary features to enable an efficient high voltage buck converter with minimal external component count. The LM25088 can be configured to operate over an ultra-wide input voltage range of 4.5V to 42V. 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 LM25088 is programmable from 50 kHz to 1 MHz switching frequency.

The LM25088 is available in two versions: the LM25088-1 provides A+/-5% frequency jitter to reduce conducted and radiated EMI, while the LM25088-2 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.