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Overview

The WD1042 is a high efficiency, synchronous step down DC-DC converter optimized for battery powered portable applications.It supports up to 1.0Aoutput current. With a wide input voltage rangeof 2.5V to 5.5V, thedevice supports applications powered by single Li-ion battery with extended voltage range, two and three alkaline cell, 3.3V and 5V input voltage range. The WD1042operates at 1.5MHz fixed switching frequencywith Pulse-Width-Modulation (PWM) and enters  Pulse-Skipping-Modulation (PSM) operation at light load current to maintain high efficiency over the entire load current range. 

The switching frequency is internally set at 1.5MHz, allowing the use of tiny surface mount inductor and input/output capacitors. Low output voltage iseasily supported with the 0.6V feedback reference voltage.

The WD1042is availablein SOT-23-5L package. Standard product is Pb-free and Halogen-free.

Applications
- IPC
- PADs
- STBs
- DSCs

Features

Input voltage range:
2.5~5.5V

Continue outputcurrent:
1.0A

Switching frequency:
1.5MHz (Typ.)

Efficiency:
Up to 92%

Feedback referencevoltage:
0.6V

100% duty cycle for low dropout operation

Adjustable Output Voltage

Order Information
Ordering No. Vout(V) Package
WD1042E-5/TR N/A SOT-23-5L
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