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G5656 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G5656 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 2 page  Ver: 0.5 Aug 03, 2009 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G5656 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 1.22V to 12V Available in SOP-8 (FD) Package Applications PC Monitors DSL Modems Distributed Power Systems Pre-Regulator for Linear Regulators General Description The G5656 is a monolithic step-down switch mode regulator with a built in internal power MOSFET. It achieves 3A continuous output current over a wide input supply range with excellent load and line regula- tion. Current mode operation provides fast transient re- sponse and 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 over- writes the internal soft-start for various requirement of output power up ramp and minimizes the inrush supply current at initial startup. The G5656 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) G5656F11U G5656 -40°C to +85°C SOP-8 (FD) G5656F12U G5656A -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 EN COMP FB LX GND VIN 4.75V~20V D1 SS34 10µH R1/28k Ω R2/16k Ω C C2 optional IN C C 22µF MLCC VOUT 3.3V/3A 10µF R C G5656 ON OFF VOUT = 1.22V x ( 1 + ) R1 R2 EN COMP FB LX GND D1 SS34 10µH R1/28k Ω R2/16k Ω IN 0.1µF VOUT 3.3V/3A G5656 100µF/220µF Electrolytic VIN 4.75V~20V C C2 C C 10µF R C ON OFF SS 0.1µF SS 0.1µF SOP-8 (FD) G5656F11U LX 8 6 5 1 2 3 4 NC IN GND SS EN COMP FB 7 Thermal Pad Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. SOP-8 (FD) G5656F12U IN 8 6 5 1 2 3 4 SS NC LX EN COMP FB GND 7 Thermal Pad EN COMP FB LX GND VIN 4.75V~20V D1 SS34 10µH R1/28k Ω R2/16k Ω C C2 optional IN C C 22µF MLCC VOUT 3.3V/3A 10µF R C G5656 ON OFF ON OFF VOUT = 1.22V x ( 1 + ) R1 R2 EN COMP FB LX GND D1 SS34 10µH R1/28k Ω R2/16k Ω IN 0.1µF VOUT 3.3V/3A G5656 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 SOP-8 (FD) G5656F11U LX 8 6 5 1 2 3 4 NC IN GND SS EN COMP FB 7 Thermal Pad LX 8 6 5 1 2 3 4 NC IN GND SS EN COMP FB 7 Thermal Pad Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. SOP-8 (FD) G5656F12U IN 8 6 5 1 2 3 4 SS NC LX EN COMP FB GND 7 Thermal Pad IN 8 6 5 1 2 3 4 SS NC LX EN COMP FB GND 7 Thermal Pad |
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