TPS51020 Texas instruments

TPS51020

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TPS51020

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Описание

The TPS51020 is a multi-function dual-synchronous step-down controller for notebook system power. The part is specifically designed for high performance, high efficiency applications where the loss associated with a current sense resistor is unacceptable. The TPS51020 utilizes feed forward voltage mode control to attain high efficiency without sacrificing line response. Efficiency at light load conditions can be maintained high as well by incorporating autoskip operation. A selectable, Suspend to RAM (STR) supported, DDR option provides a one chip solution for all switching applications from 5-V/3.3-V supply to a complete DDR termination solution.

Wide Input Voltage Range: 4.5-V to 28-V
Selectable Dual and DDR Modes
Selectable Fixed Frequency Voltage Mode
Advanced Power Good Logic Monitors both Channels
Selectable Autoskip Mode
Integrated Boot Strap Diodes
180° Phase Shift Between Channels
Integrated 5-V, 60-mA Regulator
Input Feedforward Control
1% Internal 0.85-V Reference
R_DS(on) Overcurrent Detection (4200 ppm/°C)
Integrated OVP, UVP and Power Good Timers
30-pin TSSOP Package
APPLICATIONS
- Notebook Computers System Bus and I/O
- DDR I or DDR II Termination

DDR memory type	DDR, DDR2
Control mode	Voltage mode
Iout VDDQ (max) (A)	15
Iout VTT (max) (A)	15
Iq (typ) (mA)	1.4
Output	VDDQ, VREF, VTT
Vin (min) (V)	4.5
Vin (max) (V)	28
Features	Complete Solution, Shutdown Pin for S3
Rating	Catalog
Operating temperature range (°C)	-40 to 85
Regulator type	Dual Step-Down Controller
Vin bias (max) (V)	28
Vin bias (min) (V)	4.5
Vout VTT (min) (V)	0.9