Datasheet Texas Instruments TPS64202DBVT — 数据表




 www.ti.com SLVS485 -AUGUST 2003 
 
  

FEATURES
D Step-Down Controller for Applications With
up to 95% Efficiency D 1.8-V to 6.5-V Operating Input Voltage Range
D Adjustable Output Voltage Range From 1.2 V
D to VI
High Efficiency Over a Wide Load Current
Range Low Power DSP Supply
Digital Cameras
Hard Disk Drives
Portable Audio Players DESCRIPTION
The TPS6420x are nonsynchronous step-down
controllers that are ideally suited for systems powered
from a 5-V or 3.3-V bus or for applications powered from
a 1-cell Li-Ion battery or from a 2-to 4-cell NiCd, NiMH, or
alkaline battery. These step-down controllers drive an
external P-channel MOSFET allowing design flexibility. To
achieve highest efficiency over a wide load current range,
this controller uses a minimum on time, minimum off time
control scheme and consumes only 20-ВµA quiescent
current. The minimum on time of typically 600 ns
(TPS64203) allows the use of small inductors and
capacitors. When disabled, the current consumption is …