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Switching Regulator Controller (Supporting External Synchronization)
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The MB3789 is a PWM (pulse width modulation) switching regulator controller supporting an external sync signal. The MB3789 incorporates two error amplifiers which can be used respectively for voltage control and current control, allowing the IC to serve as a DC/DC converter with current regulating functions.
The MB3789 is the ideal IC for supplying power to the back-lighting fluorescent tube for a liquid crystal display (LCD) device such as a camera-integrated VTR.
• Wide range of operating power supply voltages: 3 V to 18 V
• Low current consumption: 1.5 mA (Typ.)
• Wide input voltage range of error amplifier: –0.2 V to VCC – 1.8 V
• Built-in two error amplifier
• Oscillator capable of operating with an external sync signal
• Built-in timer latch short protection circuit
• Variable dead time provides control over total operating range
• Output supporting a power MOSFET
• 16-pin SSOP package mountable at high density
Manufacturer: Zilog
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