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G5656 Datasheet(PDF) 2 Page - Global Mixed-mode Technology Inc |
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G5656 Datasheet(HTML) 2 Page - Global Mixed-mode Technology Inc |
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2 / 2 page  Ver: 0.4 Aug 03, 2009 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G5657 Global Mixed-mode Technology Inc. 3A Step-down DC/DC Features 3A Output Current 0.15 Ω Internal Power MOSFET Switch Stable with Low ESR Output Ceramic Capaci- tors Up to 95% Efficiency 25µA Shutdown Mode Fixed 380kHz Frequency Thermal Shutdown Cycle-by-Cycle Over Current Protection Wide 4.75V to 20V Operating Input Range Output Adjustable from 0.92V to 12V Available in SOP-8(FD) Package Applications PC Monitors DSL Modems Distributed Power Systems Pre-Regulator for Linear Regulators General Description The G5657 is a monolithic step-down switch mode regulator with a built in internal power MOSFET. It achieves 3A continuous output current over a wide in- put supply range with excellent load and line regulation. Current mode operation provides fast transient re- sponse ans eases loop stabilization. Fault condition protection includes cycle-by-cycle cur- rent limiting, output short circuit protection and thermal shutdown. In shutdown mode the regulator draws 25µA of supply current. Programmable soft-start overwrites the internal soft-start for various requirement of output power up ramp and minimizes the inrush supply current at initial startup. The G5657 requires a minimum number of readily available standard external components. It is available in a SOP-8 (FD) package. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5657F11U G5657 -40°C to +85°C SOP-8 (FD) G5657F12U G5657A -40°C to +85°C SOP-8 (FD) Note: F1: SOP-8 (FD) 1 & 2: Bonding Code U : Tape & Reel Pin Configuration Typical Application Circuit 3.3V/3A 3.3V/3A EN COMP FB LX GND VIN 4.75V~20V D1 SS34 10µH R1/62k Ω R2/24k Ω C C2 optional IN C C 22µF MLCC VOUT 10µF R C G5657 ON OFF VOUT = 0.92V x (1+ ) R1 R2 EN COMP FB LX GND D1 SS34 10µH R1/62k Ω R2/24k Ω IN 0.1µF VOUT G5657 100µF/220µF Electrolytic VIN 4.75V~20V C C2 C C 10µF R C ON OFF SS 0.1µF SS 0.1µF Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. NC G5657F11U IN 8 6 5 1 2 3 4 SS LX EN COMP FB GND SOP-8 (FD) 7 EN G5657F12U LX 8 6 5 1 2 3 4 NC IN GND SS COMP FB 7 Thermal Pad Thermal Pad SOP-8 (FD) 3.3V/3A 3.3V/3A EN COMP FB LX GND VIN 4.75V~20V D1 SS34 10µH R1/62k Ω R2/24k Ω C C2 optional IN C C 22µF MLCC VOUT 10µF R C G5657 ON OFF ON OFF VOUT = 0.92V x (1+ ) R1 R2 EN COMP FB LX GND D1 SS34 10µH R1/62k Ω R2/24k Ω IN 0.1µF VOUT G5657 100µF/220µF Electrolytic VIN 4.75V~20V C C2 C C 10µF R C ON OFF ON OFF SS 0.1µF SS 0.1µF SS 0.1µF SS 0.1µF Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. NC G5657F11U IN 8 6 5 1 2 3 4 SS LX EN COMP FB GND SOP-8 (FD) 7 EN G5657F12U LX 8 6 5 1 2 3 4 NC IN GND SS COMP FB 7 Thermal Pad Thermal Pad Thermal Pad Thermal Pad SOP-8 (FD) |
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