Product Descriptions

The ADP2118 is a low quiescent current, synchronous, step-down, dc-to-dc converter in a compact 4mm × 4mm LFCSP_WQ package. It uses a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. Under light loads, the ADP2118 can be configured to operate in pulse frequency modulation (PFM) mode that reduces switching frequency to save power.

The ADP2118 runs from input voltages of 2.3 V to 5.5 V. The output voltage of the ADP2118ACPZ-R7 is adjustable from 0.6 V to input voltage (VIN), and the ADP2118ACPZ-x.x-R7 are available in preset output voltage options of 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V. The ADP2118 requires minimal external parts and provides a high efficiency solution with its integrated power switch, synchronous rectifier, and internal compensation. The IC draws less than 3 μA from the input source when it is disabled. Other key features include undervoltage lockout (UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).

Product Features

3 A continuous output current

75 mΩ and 40 mΩ integrated FET

±1.5 PERCENT output accuracy

Input voltage range from 2.3 V to 5.5 V

Output voltage from 0.6 V to VIN

600 kHz or 1.2 MHz fixed switching frequency

Synchronizable between 600 kHz and 1.4 MHz

Selectable synchronize phase shift: 0o or 180o

Selectable PWM or PFM mode operation

Current mode architecture

Precision enable input

Power good output

Voltage tracking input

Integrated soft start

Internal compensation

Starts up into a precharged output

UVLO, OVP, OCP, and thermal shutdown

Available in 16-lead 4mm × 4mm LFCSP_WQ package 

Product Applications

DSP/FPGA/ASIC core power

Telecommunication/networking equipment

PDAs and palmtop computers

Audio/video consumer electronics 

Product Photos

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