ADP151ACPZ-3.3-R7

Product Overview

The ADP151ACPZ-3.3-R7 from Analog Devices Inc. is a single-output, positive fixed linear regulator in a 6-LFCSP-UD (2x2) surface-mount package. It provides a 3.3 V output at up to 200 mA from an input voltage up to 5.5 V, with a maximum dropout voltage of 0.23 V at 200 mA. The device includes an enable control feature and integrated protection for overcurrent, overtemperature, and undervoltage lockout. Quiescent current is specified at 20 µA, and the supply current maximum is 350 µA. Power supply rejection is specified from 70 dB to 55 dB over 10 kHz to 100 kHz. The rated operating junction temperature range is -40°C to 125°C.

Key Features

• Fixed 3.3 V positive output with 200 mA current capability
• Maximum input voltage of 5.5 V
• Dropout voltage of 0.23 V at 200 mA
• Quiescent current of 20 µA and maximum supply current of 350 µA
• Power supply rejection ratio of 70 dB to 55 dB from 10 kHz to 100 kHz
• Enable control feature
• Integrated overcurrent, overtemperature, and undervoltage lockout protection
• Operating junction temperature range of -40°C to 125°C
• 6-LFCSP-UD (2x2) exposed pad CSP surface-mount package

Applications

• Regulated 3.3 V rail for embedded controllers, sensor modules, or communication peripherals
• Post-regulation from a supply within the 5.5 V maximum input limit
• Noise-sensitive analog or digital subsystems where the specified PSRR over 10 kHz to 100 kHz is relevant
• Rail-controlled power domains using the enable function for output activation or deactivation

Design & Procurement Notes

Design considerations should focus on input headroom, control, and package layout. The fixed 3.3 V output cannot be adjusted, so the rail voltage must match the load requirement. The 5.5 V maximum input voltage defines the upper limit for the source, and the 0.23 V dropout at 200 mA affects the minimum input-to-output margin when the regulator is fully loaded. The enable control feature can be used to manage the output, but the control signal behavior should be checked against the circuit's required logic interface. The exposed-pad 6-LFCSP-UD (2x2) package should be mounted on a surface-assembly PCB with attention to exposed-pad mounting and thermal path, while the -40°C to 125°C junction temperature range requires margin for self-heating in the final environment. Protection features for overcurrent, overtemperature, and UVLO support robust operation, but they do not replace careful input selection, load planning, and layout.