深圳市中立信电子科技有限公司

1 Features 3 Description

The LM25088 high voltage non-synchronous buck 1• LM25088Q is an Automotive Grade Product that is

controller features all the necessary functions to AEC-Q100 Grade 1 Qualified (-40°C to +125°C

implement an efficient high voltage buck converter Operating Junction Temperature) using a minimum number of external components.

• Emulated Current Mode Control The LM25088 can be configured to operate over an

• Drives External High-Side N-Channel MOSFET ultra-wide input voltage range of 4.5 V to 42 V. This

easy to use controller includes a level shifted gate • Ultra-Wide Input Voltage Range from 4.5V to 42V

driver capable of controlling an external N-channel

• Low IQ Shutdown and Standby Modes buck switch. The control method is based upon peak

• High Duty Cycle Ratio Feature for Reduced current mode control utilizing an emulated current

Dropout Voltage ramp. The use of an emulated control ramp reduces

noise sensitivity of the pulse-width modulation circuit, • Spread Spectrum EMI Reduction (LM25088-1)

allowing reliable control of very small duty cycles

• Hiccup Timer for Overload Protection (LM25088- necessary in high input voltage/low output voltage

2) applications. The LM25088 switching frequency is

• Adjustable Output Voltage from 1.205 V with 1.5% programmable from 50 kHz to 1 MHz.

Feedback Reference Accuracy The LM25088 is available in two versions: The

• Wide Bandwidth Error Amplifier LM25088-1 provides a +/-5% frequency dithering

• Single Resistor Oscillator Frequency Setting function to reduce the conducted and radiated EMI,

while the LM25088-2 provides a versatile restart timer • Oscillator Synchronization Capability for overload protection. Additional features include a

• Programmable Soft-Start low dropout bias regulator, tri-level enable input to

• High Voltage, Low Dropout Bias Regulator control shutdown and standby modes, soft-start and

oscillator synchronization capability. The device is • Thermal Shutdown Protection

available in a thermally enhanced HTSSOP-16 pin

• Package: HTSSOP 16-Pin package.

2 Applications Device Information(1)

• Automotive Infotainment PART NUMBER PACKAGE BODY SIZE (NOM)

• Automotive USB Accessory Adapters LM25088 HTSSOP (16) 5.00 mm × 4.40 mm

• Industrial DC-DC Bias and Motor Drivers