The F72814 is a high-efficiency synchronous buck PWM controller that generates logic-supply voltages in PC based systems. This high-performance , single output device includes internal soft-start, frequency-compensation networks, power good signal with delay, and integrates all of the control, output adjustment, monitoring and protection functions into a single package. This device operates at a fixed frequency, 300K Hz and provides an optimum compromise between efficiency, external component size, and cost. Adjustable over-current protection (OCP) monitors the voltage drop across the RDS (ON) of the lower MOSFET for synchronous buck PWM DC-DC controller. The over-current function cycles the soft-start in 4-times hiccup mode to provide fault protection, and in a routine hiccup mode for under-voltage protection.
- FEATURES
- PACKAGE
- ATTACHMENTS
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Provides one synchronous rectified buck DC-DC PWM controller
- Fast transient response (high bandwidth error amplifier; full 0~80% duty cycle)
- Fixed operation frequency : 300KHz
- Single loop voltage-mode control
- Few external components
- Output range adjustable down to 0.8V
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Operatesunder 5V to 12V input
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Drives all low cost N-channel MOSFETs
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Uses MOSFET RDS(ON) as over currentmonitor, and no current sense resistor is required
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0.8V internal reference voltage
- ±2% accuracy over line, load and temperature
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Internal soft-start (typically 3 ms)
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Internal loop compensation
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Under voltage fault monitoring and protection
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Over voltage protection
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Adaptive Non-Overlapping Gate Driver
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8-SOP package (150 mil)