G2992B Global Mixed-mode Technology 2A DDR Bus Termination Regulator Features General Description The G2992B is a linear regulator designed to meet the JEDEC SSTL-18, SSTL-2 and SSTL-3 (Series Stub Termination Logic) specifications for termination of DDR I/ II/ III -SDRAM. It contains a high-speed operational amplifier that provides excellent response to the load transients. This device can deliver 2A continuous current in the application such as required for DDR I/ II/ III SDRAM termination. The G2992B can easily provide the accurate VTT voltage with two external resistors generating reference voltage. The quiescent current is as low as 750µA @ VCNTL = 3.3V. So the power consumption can meet the low power consumption applications. The G2992B also has a shutdown function by setting VREF smaller than 0.2V, that provides Suspend to RAM (STR) functionality. When in the shutdown mode, the VTT output (on VOUT pin) will be tri-state providing a high impendence. A power saving advantage can be obtained in this mode through lowering the quiescent current to 50μA @ VCNTL = 3.3V. VCNTL Supply Voltage: 3V to 5.5V Termination Supply Voltage: 1.2V to 3.6V Support DDR I(1.25VTT), DDR II (0.9 VTT), and DDR III(0.75VTT) Requirements Requires Only 20µF Ceramic Output Capacitor Low Output Offset 2A Source and Sink Current Low External Component Count No Inductor Required Thermal Shutdown Protection Over Current Protection Suspend to RAM (STR) Function with High-impedance Output SOT-23-5, SOP-8 and MSOP-8 (FD) Package Applications DDR-SDRAM Termination Voltage DDR I / DDR II / DDRIII Termination Voltage SSTL-18 SSTL-2 SSTL-3 Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G2992BT11U 292Bx -40°C to +125°C SOT-23-5 G2992BP11U G2992BF51U G2992B G2992B -40°C to +125°C -40°C to +125°C SOP-8 MSOP-8 (FD) Note: T1: SOT-23-5 P1: SOP-8 1: Bonding Code U: Tape & Reel F5: MSOP-8 (FD) Pin Configuration G2992B GND 1 VCNTL 2 VIN 3 G2992B 5 4 SOT-23-5 VREF VOUT G2992B VIN 1 8 VCNTL VIN 1 GND 2 7 VCNTL GND 2 VREF 3 6 VCNTL VREF 3 VOUT 4 5 VCNTL VOUT 4 SOP-8 Thermal Pad 8 NC 7 NC 6 VCNTL 5 NC MSOP-8 (FD) Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.8 May 07, 2013 1