GM7130 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Description Features 3.3V, 5V, 12V and Adjustable output versions GM7130 series is designed to provide all the active function for a step-down (buck) switching regulator, and drives a maximum load current as high as 3A line and load regulations. GM7130 is available in fixed output voltages of 3.3V, 5V, 12V and a versatile Adjustable output version. Adjustable version output voltage range 1.23V to 37V VOUT accuracy is up to ±2% under specified input voltage the output load conditions These regulators are simple to use and require minimum number of external components. The features include internal frequency compensation and a fixed-frequency oscillator. Input voltage range up to 40V Requires only 4 external components with High efficiency The GM7130 is high-efficiency replacements for popular three-terminal linear regulators, and is requiring a smaller heat sink or even no need heat sink. TTL shutdown capability, low power standby mode Built-in thermal shutdown, current limit protection GM7130 performs well with standard inductors from most of manufacturers, and simplifying the design of switch-mode power supplies. External shutdown is included with 80 µA (typical) standby current. The output switch has cycle-by-cycle current limiting as well as thermal shutdown for full protection under fault conditions. Uses standard inductors 52 kHz fixed frequency internal oscillator GM7130 operates at a switching frequency of 52 kHz which allowing smaller size filter components than what would be needed with lower frequency switching regulators. GM7130 series are available in a standard 5-lead TO-220, TO220B and TO263 packages. Application Pre-regulator for linear regulators On-card/board switching regulators High-efficiency step-down buck regulator Positive to negative converter (buck-boost) Typical Application Circuits GM7130-5.0 Feedback 4 1 VIN L1 100μH Output CIN 100μF GND 3 5 5V regulated output, ON/OFF 5 D1 1N5822 COUT 680μF www.gammamicro.com.tw GM7130V2.03 7V – 40V Unregulated DC Input 1