G2997F6U

Global Mixed-mode Technology Inc. G2997 DDR Termination Regulator Features Support Both DDR I (1.25VTT) and DDR II (0.9 VTT) Requirements Input Voltage Range: 3.3V to 5.5V VLDOIN Voltage Range: 1.2V to 3.6V Requires Only 20µF Ceramic Output Capacitance Supports High-Z in S3 and Soft-Off in S5 Integrated Divider Tracks 1/2 VDDQSNS for Both VTT and VTTREF Remote Sensing (VTTSNS) ±20mV Accuracy for VTT and VTTREF 10mA Buffered Reference (VTTREF) Built-In Soft-Start Over Current Protection Thermal Shutdown Protection MSOP-10 and MSOP-10(Exposed Pad) Package General Description The G2997 is a 3A sink/source tracking termination regulator. It is specifically designed for low-cost/ low-external component count systems. The G2997 maintains a high speed operational amplifier that provides fast load transient response and only requires 20µF (2x10µF) of ceramic output capacitance. The G2997 supports remote sensing functions and all features required to power the DDR I / DDR II VTT bus termination according to the JEDEC specification. In addition, the G2997 includes integrated sleep-state controls placing VTT in High-Z in S3 (suspend to RAM) and soft-off for VTT and VTTREF in S5 (Shutdown). The G2997 is available in the thermally efficient 10pin MSOP and MSOP (Exposed PAD). Applications DDR I/II Memory Termination SSTL−2, SSTL−18 HSTL Termination Ordering Information ORDER NUMBER G2997P7U G2997F6U MARKING G2997 G2997 TEMP. RANGE -40°C~85°C -40°C~85°C PACKAGE (Pb free) MSOP-10 MSOP-10 (FD) Note: P7: MSOP-10 F6: MSOP-10 (FD) U: Tape & Reel (FD): Thermal Pad Pin Configuration Typical Application Circuit G2997 VDDQSNS VLDOIN VTT PGND VTTSNS 1 2 3 4 5 10 VIN 9 8 7 6 S5 GND S3 VTTREF 2.5V VDDQSNS VDDQSNS VLDOIN VIN S5 GND S3 VTTREF C2 0.1µF S3 VIN=5V S5 Thermal Pad VTT C1 2*10µF PGND VTTSNS Top View MSOP-10 Bottom View Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation. Ver: 1.1 Jul 06, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw 1 Global Mixed-mode Technology Inc. Absolute Maximum Ratings (1) G2997 Recommend Operating Range (1) (2) VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3V to 5.5V S3, S5 . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.1V to 5.5V VDDQSNS. . . . . . . .. . . . . . . . . . . . . . . . .1.6V to 3.6V VLDOIN . . . . . . . . . . . . . . . . . . . . . . . . . .1.2V to 3.6V PGND . . . . . . . . . . . . . . . . . . . . . .-0.1V to 0.1V Operating Ambient Temperature Range TA . . . . . . . . . . . . . . . . . . . . . . . .. . . . .-40°C to 85°C Supply Voltage Range VIN, VLDOIN, VTTSNS, VDDQSNS, S3, S5..-0.3V to +6V PGND . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 0.3V Output Voltage Range VTT, VTTREF . . . . . . . . . . . . . . . . . . . . . .-0.3V to 6V Maximum Junction Temperature,TJ . . . . .. . . ..160°C Storage Temperature Range, TSTG.-55°C to +160°C Reflow Temperature (soldering, 10sec). . . . . 260°C Thermal Resistance Junction to Ambient, (θJA) MSOP-10 . . . . . . . . . . . . . . . . . . . . . . . . . . 120°C/W MSOP-10 (FD) . . . . . . .. . . . . . . . . . . . . . . 60°C/W(3) Note: (1) All voltage values are with respect to the network ground terminal unless otherwise noted. (2) VLDOIN, VTTSNS, VDDQSNS, S3, S5 must be lower than VIN on operation. (3) Please refer to PCB size described in EV2997-10. Electrical Characteristics Specifications with standard typeface are for TA=25°C, VIN=5V, VLDOIN=2.5V and VDDQSNS=2.5V. Unless otherwise specified. PARAMETER Supply current, VIN Standby current, VIN Shutdown current, VIN Supply current, VLDOIN Standby current, VLDOIN Shutdown current, VLDOIN VDDQSNS input Impedance VTTSNS input current VTT output voltage VTT Output Voltage Load Regulation (VTTREF-VTT) VTT Source Current limit VTT Sink Current limit VTT leakage current in S3 mode VTT Discharge Current VTTREF output voltage VTTREF Voltage Load Regulation High Level Input Voltage Low Level Input Voltage Logic input leakage current Thermal Shutdown Thermal Shutdown Hystersis SYMBOL IVIN IVINSTB IVINSDN IVLDOIN CONDITIONS VVIN=5V, no load, S5=5V, S3 =5V VVIN=5V, no load, S5=5V, S3 =0V VVIN=5V, no load, S5=0V, S3 =0V MIN 0.5 -----------------20 -30 -40 3 1.5 3 1.5 --10 ---20 1.6 ---1 ----- TYP 0.8 110 --0.03 0.1 0.1 200 0.3 1.25/0.9 ------4 2 4 2 0.01 20 1.25/0.9 --------160 20 MAX UNIT 2 200 1 2 10 1 --1 --20 30 40 --------------20 --1 1 ----mA µA µA mA µA µA KΩ µA V mV VVIN=5V, no load, S5=5V, S3 =5V IVLDOINSTB VVIN=5V, no load, S5=5V, S3 =0V IVLDOINSDN VVIN=5V, no load, S5=0V, S3 =0V ZVDDQSNS VVIN=5V, S5=5V, S3 =5V IVTTSNS VTT VOSVTT VVIN=5V, S5=5V, S3 =5V (DDR I/DDR II) IVTT=0 |IVTT|