Texas Instruments TPS64203

Description

The TPS6420x are nonsynchronous step-down controllers that are ideally suited for systems poweredfrom 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, oralkaline 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-µA quiescent current. The minimum on time of typically 600 ns (TPS64203) allows the use of small inductors and capacitors. When disabled, the current consumption isreduced to less than 1 µA. The TPS6420x is available in the 6-pin SOT23 (DBV) package and operates over a free air temperature range of -40°C to 85°C.

Features

• Step-Down Controller for Applications With up to 95% Efficiency
• 1.8-V to 6.5-V Operating Input Voltage Range
• Adjustable Output Voltage Range From 1.2 V to VI
• High Efficiency Over a Wide Load Current Range
• 100% Maximum Duty Cycle for Lowest Dropout
• Internal Softstart
• 20-µA Quiescent Current (Typical)
• Overcurrent Protected
• Available in a SOT23 Package

Remarks:

• The TPS6420x operates with a wide range of inductor values. Valuesbetween 4.7 μH and 47 μH work in most applications.

Typical applications

• Low Power DSP Supply
• Digital Cameras
• Hard Disk Drives
• PDAs
• Portable Audio Players
• Handheld PCs
• USB Powered Peripherals

More information

• Datasheet
• IC product information