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G5196 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G5196 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 1 page  Ver: 0.1 Nov 15, 2011 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G5196 Global Mixed-mode Technology High Efficiency, 6A Output, Synchronous Step Down Features Two 20m Ω (typical) MOSFETs for high effi- ciency at 6A loads 200kHz to 2MHz Switching Frequency 0.8V ± 1% Voltage Reference Over Temperature Synchronizes to External Clock Adjustable Soft Start UV and OV Power Good Output Low Operating and Shutdown Quiescent Cur- rent Safe Start-up into Pre-Biased Output Cycle by Cycle Current Limit, Thermal and Frequency Fold Back Protection Thermally Enhanced 3mm × 3mm 16-pin TQFN and 4mm × 4mm 16-pin TQFN Applications Low-Voltage, High-Density Power Systems Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors Broadband, Networking and Optical Commu- nication Infrastructure Ordering Information ORDER NUMBER Marking TEMP. RANGE PACKAGE (Green) G5196R41U 5196 -40°C to +85°C TQFN3X3-16 G5196R41D 5196 -40°C to +85°C TQFN3X3-16 G5196R81U 5196 -40°C to +85°C TQFN4X4-16 Note: R4: TQFN3X3-16 R8:TQFN4X4-16 1: Bonding Code U & D: Tape & Reel General Description The G5196 device is a full featured 5.5V, 6A synchro- nous step down current mode converter with two inte- grated MOSFETs. The G5196 enables small designs by integrating the MOSFETs, implementing current mode control to re- duce external component count, reducing inductor size by enabling up to 2MHz switching frequency, and minimizing the IC footprint with a small 3mm x 3mm (4mm x 4mm) thermally enhanced TQFN package. The G5196 provides accurate regulation for a variety of loads with an accurate ±1% Voltage Reference (VREF) over temperature. Efficiency is maximized through the integrated 20m Ω MOSFETs and 350µA typical supply current. Using the enable pin, shutdown supply current is reduced to 2µA by entering a shutdown mode. Under voltage lockout is internally set at 2.6V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage startup ramp is controlled by the soft start pin. An open drain power good signal indicates the output is within 93% to 107% of its nominal voltage. Frequency fold back and thermal shutdown protects the device during an over-current condition. Pin Configuration Typical Application Circuit TQFN3X3-16/TQFN4X4-16 1 2 3 4 12 11 10 9 LX LX LX SS Thermal Pad VINA VIN GND GND Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. VIN 3.3V to 5.5V CI 10µF R3 48.7K Ω R4 32.4K Ω CSS 0.01µF RT 182K Ω G5196 RC 20K Ω CC 470PF VINA VIN EN RT COMP SS BS LX FB (0.803V) GND AGND EP CBS 0.1µF LO 1.0µH VOUT 1.8V CD* CO 22*2µF R1 100K Ω R2 80K Ω CZ* ＊ Option R5 100K Ω PG ＊ VINA must connect to VIN G5196 TQFN3X3-16/TQFN4X4-16 1 2 3 4 12 11 10 9 LX LX LX SS Thermal Pad VINA VIN GND GND Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. VIN 3.3V to 5.5V CI 10µF R3 48.7K Ω R4 32.4K Ω CSS 0.01µF RT 182K Ω G5196 RC 20K Ω CC 470PF VINA VIN EN RT COMP SS BS LX FB (0.803V) GND AGND EP CBS 0.1µF LO 1.0µH VOUT 1.8V CD* CO 22*2µF R1 100K Ω R2 80K Ω CZ* ＊ Option R5 100K Ω PG ＊ VINA must connect to VIN G5196 |
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