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GM7109 Datasheet(PDF) 1 Page - Gamma Microelectronics Inc. |
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GM7109 Datasheet(HTML) 1 Page - Gamma Microelectronics Inc. |
1 / 9 page 1 GM7109 150KHz, 2A STEP DOWN VOLTAGE SWITCHING REGULATORS www.gammamicro.com.tw Application Pre-regulator for linear regulators High-efficiency step-down buck regulator On-card/board switching regulators Positive to negative converter (buck-boost) LCD Monitors Description GM7109 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 2A line and load regulations. GM7109 is available in fixed output voltages of 3.3V, 5V, and a versatile Adjustable output version. These regulators are simple to use and require minimum number of external components. The features include internal frequency compensation and a fixed-frequency oscillator. The GM7109 is high-efficiency replacements for popular three-terminal linear regulators, and is requiring a smaller heat sink or even no need heat sink. GM7109 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. GM7109 operates at a switching frequency of 150 kHz which allowing smaller size filter components than what would be needed with lower frequency switching regulators. GM7109 series are available in a standard 8-lead SO package or 8 lead SO package with heat sink. Features Standard SOP8 & PSOP8 package 3.3V, 5V, and Adjustable output versions Adjustable version output voltage range 1.23V to 37V VOUT accuracy is to ±2% under specified input voltage the output load conditions Input voltage range up to 40V Requires only 4 external components with High efficiency TTL shutdown capability, low power standby mode Built-in thermal shutdown, current limit protection Uses standard inductors 150 kHz fixed frequency internal oscillator Typical Application Circuits 1 Unregulated DC Input CIN 680µF VIN GM7109-5.0 FB Output GND L1 68µH 5V regulated outpu t, COUT 220µF D1 1N5824 SD 1 3 2 4 5, 6, 7, 8 |
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