G5207 GMT | Alldatasheet

Document overview

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Technical content

Features

/square6 Drives Two N-Channel MOSFETs /square6 Operates at 5V Supply Voltage /square6 Voltage-Mode PWM Control /square6 Fast Transient Response /square6 0.8V, 2% Accuracy Reference Voltage /square6 Internal Soft Start /square6 Constant 300kHz Switching Frequency /square6 Over-Current Fault Monitors by Using Low-Side MOSFET R DS(ON) /square6 Output Under-Voltage Protection

Applications

/square6 16V to 30V Input High Power DC-DC Regulators /square6 Low-Voltage Distributed Power Supplies General Description The G5207 provides complete control and protection for a DC-DC converter for high power applications. It is designed to drive two N-channel MOSFETs in a synchronous-rectified buck topology. The G5207 inte- grates all of the control, and protection functions into a single package. The G5207 provides simple, single feedback loop, voltage-mode control with fast transient response. It includes a 300KHz free-running triangle-wave oscilla- tor. The error amplifier features a 15MHz gain-band- width product which provides high converter band- width for fast transient performance. The resulting PWM duty ratio ranges from 0% to 80%. The refer- ence voltage is 0.8V, 2% accuracy. The G5207 has internal soft start and executes cy- cle-by-cycle current limit during soft start interval. The G5207 monitors the current by using the R DS(ON) of the low-side MOSFET which eliminates the need for a current sensing resistor. The under-voltage protection function monitors voltage at FB pin. The over-current and under-voltage events after soft-start interval trig- ger hiccup mode protection.

Ordering Information

NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5207P11U G5207 -40 °C~ +85 °C SOP-8 Note: P1: SOP-8 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit GND BOOT UGATE LGATE LX OCSET FB VCC SOP-8 G5207 BOOT SHDN UGATE 6µHOCSET FB LGATE GND VCC 5V G5207 0.1 µF 2000 µF 10nF 10 Ω 4.7 µF 220 µF 620 Ω 39 Ω 16~30V R OCSET LX VO =13.5V GND BOOT UGATE LGATE LX OCSET FB VCC SOP-8 G5207 BOOT SHDN UGATE 6µHOCSET FB LGATE GND VCC 5V G5207 0.1 µF 2000 µF 10nF 10 Ω 4.7 µF 220 µF 620 Ω 39 Ω 16~30V R OCSET LX VO =13.5V