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G5616

Global Mixed-mode Technology
Part Number G5616
Manufacturer Global Mixed-mode Technology
Description Complete DDR / DDRII and DDRIII Memory Solution Synchronous Buck PWM Controller
Published Jan 10, 2016
Detailed Description Global Mixed-mode Technology G5616 Complete DDR, DDRII and DDRIII Memory Solution Synchronous Buck PWM Controller, 3A...
Datasheet PDF File G5616 PDF File

G5616
G5616

Overview
Global Mixed-mode Technology G5616 Complete DDR, DDRII and DDRIII Memory Solution Synchronous Buck PWM Controller, 3A LDO, Buffered Reference Features •Synchronous Buck Controller (VDDQ) „ 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 •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 Ca- pacitance „ 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 Surg- ing Current „ Over Current Protection of VTT Output „ Thermal Shutdown Protection Applications „ Notebook Computers „ CPU Core Supply „ Chipset/RAM Supply as Low as 0.
75V „ 1.
8V and 2.
5V I/O Supply 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.
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 h...


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