Controller IC Chip - SYNCHRONOUS BUCK MOSFET APW8868C chip for laptop - Integrated Laptop Chip (Code 1-CHIP0312)

Controller IC Chip - SYNCHRONOUS BUCK MOSFET APW8868C chip for laptop- Integrated portable calculator chip(SKU.1-CHIP0312)

The APW8868C integrates a synchronous buck PWM con-troller to generate VDDQ. a sourcing and sinking 100 linear regulator to generate VTT. It offers the lowest total solution cost in system where space is at a premium. The APW8868C provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM). the APW8868C provides very high efficiency over light to heavy loads with loading-modulated switching frequencies. On TOFN-20 Package, the Forced PWM Mode works nearly at con-stant frequency for low-noise requirements. The APW8868C is equipped with accurate current-limit. output under-voltage, and output over-voltage protections. A Power-On- Reset function monitors the voltage on VCC prevents wrong operation during power on. The LDO is designed to provide a regulated voltage with bi-directional output current for DDR-SDRAM termination. The device integrates two power transistors to source or sink current up to 1.5A. It also incorporates current-limit and thermal shutdown protection. The output voltage of 100 tracks the voltage at VREF An internal resistor divider is used to provide a half volt-age of VREF for VTTREF and VTT Voltage. The Vfloutput voltage is only requiring 20pF of ceramic output capaci-tance for stability and fast transient response. The S3 and S5 pins provide the sleep state for VII (S3 state) and suspend state (S4/S5 state) for device. when S5 and S3 are both puled low the device provides the soft-off for VTT and VTTREF.

Buck Controller (WOO) • High Input Voltages Range from 3V to 28V Input Power • Provide Adjustable Output Voltage from 0.75V to 5.5V +1% Accuracy over Temperature • Integrated MOSFET Drivers and Bootstrap Forward P-CHMOSFET • Low Quiescent Current (200uA) • Excellent Line and Load Transient Responses • PFM Mode for Increased Light Load Efficiency • Constant On-Time Controller Scheme - Switching Frequency Compensation for PWM Mode -Adjustable Switching Frequency from 400kHz to 550kHz in PWM Mode with DC Output Current • S3 and S5 Pins Control The Device In SO. S3 or 54/ S5 State • Power Good Monitoring • 70% Under-Voltage Protection (UVP) • 125% Over-Voltage Protection (OVP) • Adjustable Current-Limit Protection - Using Sense Low-Side MOSFET's RDS(ON) • TQFN-20 3mmx3mm Thin package • Lead Free Available (R0HS Compliant) +1.5A LDO Section (VTT) • Sourcing or Sinking Current up to 1.5A • Fast Transient Response for Output Voltage • Output Ceramic Capacitors Support at least 10pF MLCC • VTT and VTTREF Track at Half the VDDOSNS by internal divider • +20mV Accuracyfor VTT and VTIREF • Independent Over-Current Limit (OCL) • Thermal Shutdown Protection

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