代理产线

TI Memory Power Solution Synchronous Buck Controller

 2014-11-26

【基本数据】

【产品特性】

DDR2, DDR3 and DDR3L Memory Power Solution Synchronous Buck Controller
1. Supports DDR2 (1.8V), DDR3 (1.5V), DDR3L (1.35V) and DDR4 (1.2V)
2. PWM Conversion Voltage Range: 3 V to 28 V
3. D-CAP/ D-CAP2™ Control Mode
4. Selectable 300k/ 400kHz (D-CAP), 500k/ 670kHz (D-CAP2)
5. Auto-Skip Mode at Light loads
6. Supports Soft-Off in S4/S5 States
7. Full Protections
8. Latch-off (OVP/ UVP)
9. Non-Latch (UVLO/ OTP)
10. Cycle-by-cycle Valley OCL
11. VTT LDO 2-A (Peak) Sink and Source Current
12. 20-Pin, 3 mm × 3 mm, QFN Package

【产品应用】

 Ultrabooks
 Notebook Computers
 Tablet Computers
 Embedded Computers

【文字介绍】

The TPS51916 provides a complete power supply for DDR2, DDR3 and DDR3L memory systems in the lowest total cost and minimum space. It integrates a synchronous buck regulator controller (VDDQ) with a 2-A sink/source tracking LDO (VTT) and buffered low noise reference (VTTREF). The TPS51916 employs D-CAP™ mode coupled with 300 kHz/400 kHz frequencies for ease-of-use and fast transient response or D-CAP2™ mode coupled with higher 500 kHz/670 kHz frequencies to support ceramic output capacitor without an external compensation circuit. The VTTREF tracks VDDQ/2 within excellent 0.8% accuracy. The VTT, which provides 2-A sink/source peak current capabilities, requires only 10-μF of ceramic capacitance. In addition, a dedicated LDO supply input is available.

The TPS51916 provides rich useful functions as well as excellent power supply performance. It supports flexible power state control, placing VTT at high-Z in S3 and discharging VDDQ, VTT and VTTREF (soft-off) in S4/S5 state. Programmable OCL with low-side MOSFET RDS(on) sensing, OVP/UVP/UVLO and thermal shutdown protections are also available.