G5616 Global Mixed-mode Technology Complete DDR, DDRII and DDRIII Memory Solution Synchronous Buck PWM Controller, 3A LDO, Buffered Reference Features •Synchronous Buck Controller (VDDQ) General Description The G5616 is intended for DDR/SSTL-2, DDRII/SSTL-18 and DDRIII memory systems. It integrates a synchronous buck PWM controller with a 3-A sink-source linear regulator and buffered reference. Ultra-High Efficiency No Current-Sense Resistor (Lossless ILIMIT) Quasi-PWM with 100ns Load-Step Response 1.8V(DDRII) /1.5V(DDRIII) Fixed or Adjustable to 2.5V(DDR) or 0.75V to 3.6V Adjustable Output Range 2V to 24V Battery Input Range 400kHz Switching Frequency OVP & UVP of VDDQ Output Drives Large Synchronous-Rectifier FETs Power-Good Indicator The PWM controller uses constant on-time control scheme to handle wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency. The G5616 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous rectifier MOSFETs. Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. •3-A LDO (VTT), Buffered Reference (VTTREF) Support DDR (1.25 VTT) , DDR II (0.9 VTT) and DDRIII(0.75 VTT) Requirements VLDOIN Voltage Range: 1.2V to 3.6V Requires Only 20µF Ceramic VTT 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 to Reduce the VLDOIN Surging Current Over Current Protection of VTT Output Thermal Shutdown Protection The 3A sink/source tracking termination regulator is specifically designed for low-cost/ low-external component count systems. The regulator contains a high speed operational amplifier that provides fast load transient response with only 20µF (2x10µF) of ceramic output capacitance. The G5616 supports remote sensing functions and all features required to power the DDR /DDRII /DDRIII VTT bus termination according to the JEDEC specification. In addition, the G5616 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). Applications The G5616 provides OVP, UVP, over current and thermal shutdown protection functions and is available in a 20-pin 3X3 TQFN package and 24-pin 4X4 TQFN includes over voltage protection. Notebook Computers CPU Core Supply Chipset/RAM Supply as Low as 0.75V 1.8V and 2.5V I/O Supply Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5616RZ1U G5616R51U 5616 5616 -40°C to +85°C -40°C to +85°C TQFN3X3-20 TQFN4X4-24 Note: RZ: TQFN3X3-20 1: Bonding Code U : Tape & Reel R5: TQFN4X4-24 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.5 Oct 26, 2012 1 G5616 Global Mixed-mode Technology 4 12 VPP 5 11 VCC 8 9 10 S3 PGOOD 7 VDDQSET S5 6 VDDQSNS G5616 TQFN3X3-20 BST DH LX DL 22 20 19 VLDOIN 23 21 VTT 24 4 VTTREF 5 14 VCC NC 6 13 PGOOD Thermal Pad 12 MODE VTTREF GND MODE NC CS 11 13 Thermal Pad NC 3 S5 3 17 9 GND 2 10 PGND PGND VTTSNS S3 14 18 VDDQSET 2 1 8 VTTSNS VTTGND VDDQSNS 15 DL 7 LX 16 VTTGND 1 NC BST DH 17 VLDOIN 19 18 VTT 20 Pin Configuration 16 CS 15 VPP G5616 TQFN4X4-24 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.5 Oct 26, 2012 2 G5616A Global Mixed-mode Technology Complete DDR, DDRII and DDRIII Memory Solution Synchronous Buck PWM Controller, 2A LDO, Buffered Reference Features •Synchronous Buck Controller (VDDQ) General Description The G5616A is intended for DDR/SSTL-2, DDRII/SSTL-18 and DDRIII memory systems. It integrates a synchronous buck PWM controller with a 2A sink-source linear regulator and buffered reference. Ultra-High Efficiency No Current-Sense Resistor (Lossless ILIMIT) Quasi-PWM with 100ns Load-Step Response 1.8V(DDRII) /1.5V(DDRIII) Fixed or 0.75V to 3.6V Adjustable Output Range 2V to 28V Battery Input Range Programmable Switching Frequency OVP & UVP of VDDQ Output Drives Large Synchronous-Rectifier FETs Power-Good Indicator The PWM controller uses constant on-time control scheme to handle wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency. The G5616A achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous rectifier MOSFETs. Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. •2-A LDO (VTT), Buffered Reference (VTTREF) Support DDR (1.25 VTT) , DDR II (0.9 VTT) and DDRIII(0.75 VTT) Requirements VLDOIN Voltage Range: 1.2V to 3.6V Requires Only 20µF Ceramic VTT 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 to Reduce the VLDOIN Surging Current Over Current Protection of VTT Output Thermal Shutdown Protection The 2A sink/source tracking termination regulator is specifically designed for low-cost/ low-external component count systems. The regulator contains a high speed operational amplifier that provides fast load transient response with only 20µF (2x10µF) of ceramic output capacitance. The G5616A supports remote sensing functions and all features required to power the DDR /DDRII /DDRIII VTT bus termination according to the JEDEC specification. In addition, the G5616A 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). Applications The G5616A provides OVP, UVP, over current and thermal shutdown protection functions and is available in a 20-pin 3X3 TQFN package and 24-pin 4X4 TQFN includes over voltage protection. Notebook Computers CPU Core Supply Chipset/RAM Supply as Low as 0.75V 1.8V and 2.5V I/O Supply Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5616ARZ1U G5616AR51U 5616A 5616A -40°C to +85°C -40°C to +85°C TQFN3X3-20 TQFN4X4-24 Note: RZ: TQFN3X3-20 1: Bonding Code U : Tape & Reel R5: TQFN4X4-24 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.0 Oct 26, 2012 1 G5616A Global Mixed-mode Technology CS VTTREF 4 12 VPP VDDQSNS 5 11 VCC 6 7 8 9 10 VDDQSET S3 S5 TON PGOOD G5616A TQFN3X3-20 GND 3 MODE 4 BST DH LX DL 22 20 19 23 21 VTT VLDOIN 24 Thermal Pad 16 CS 15 VPP VTTREF 5 14 VCC NC 6 13 PGOOD 12 13 Thermal Pad 11 3 S5 GND NC TON PGND 9 14 17 10 2 2 S3 VTTSNS PGND VTTSNS VDDQSET DL 8 16 15 18 7 LX 17 1 1 NC DH 18 VTTGND VTTGND VDDQSNS VLDOIN BST 19 VTT 20 Pin Configuration G5616A TQFN4X4-24 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.0 Oct 26, 2012 2