G5196 Global Mixed-mode Technology High Efficiency, 6A Output, Synchronous Step Down Features General Description The G5196 device is a full featured 5.5V, 6A synchronous step down current mode converter with two integrated MOSFETs. Two 20mΩ (typical) MOSFETs for high efficiency 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 Current 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 The G5196 enables small designs by integrating the MOSFETs, implementing current mode control to reduce 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 20mΩ MOSFETs and 350µA typical supply current. Using the enable pin, shutdown supply current is reduced to 2µA by entering a shutdown mode. Applications Low-Voltage, High-Density Power Systems Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors Broadband, Networking and Optical Communication Infrastructure 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. Ordering Information ORDER NUMBER Marking TEMP. RANGE PACKAGE (Green) G5196R41U 5196 -40°C to +85°C TQFN3X3-16 G5196R41D G5196R81U 5196 5196 -40°C to +85°C TQFN3X3-16 -40°C to +85°C TQFN4X4-16 Frequency fold back and thermal shutdown protects the device during an over-current condition. Note: R4: TQFN3X3-16 R8:TQFN4X4-16 1: Bonding Code U & D: Tape & Reel Pin Configuration Typical Application Circuit VINA 1 VIN 2 VIN EN PG BS 15 14 13 3 VIN 3.3V to 5.5V 12 LX 11 LX 10 4 CI 10µF VINA R5 100KΩ VIN R3 48.7KΩ R4 32.4KΩ EN PG LX SS RT COMP 8 SS RT 7 COMP AGND 6 9 5 GND Thermal Pad FB GND 16 G5196 CSS 0.01µF RT 182KΩ CZ* TQFN3X3-16/TQFN4X4-16 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. G5196 BS LX FB (0.803V) CBS 0.1µF LO 1.0µH CO 22*2µF VOUT 1.8V CD* R1 100KΩ R2 80KΩ GND AGND EP RC 20KΩ CC 470PF ＊ Option ＊ VINA must connect to VIN TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.1 Nov 15, 2011 1