AP7343D-23FS4-7B

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The AP7343D-23FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a precise 2.3V output with a guaranteed maximum load current of 300mA. It operates within an input voltage range of 1.7V to 5.25V and features high power supply rejection ratio performance of 75dB at 1kHz alongside low output noise of 60µVrms from 10Hz to 100kHz. The device incorporates an enable pin for power management control and includes built-in thermal shutdown and fold-back short-circuit protection. Packaged in the compact X2-DFN1010-4 (Type B) format, it supports operation across an ambient temperature range of -40°C to +85°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrated discharge function enabled by the 'D' suffix for rapid output voltage decay upon disable
• High ripple rejection capability ensures stable regulation under noisy power supply conditions
• Low quiescent current consumption optimizes battery life in portable applications
• Built-in thermal shutdown and current limit circuits protect against overload and overheating

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• RF power supply stages in communication modules
• Portable video equipment power rails
• Wireless adapter circuitry
• Camera module biasing

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix FS4-7B confirms the X2-DFN1010-4 package type and tape-and-reel packing quantity. Confirm the 'D' designation indicates the presence of the auto-discharge feature on the output pin. Ensure the component meets RoHS 3 compliance requirements for your target market. Cross-reference the datasheet revision DS37952 Rev. 14 for the most accurate electrical characteristics and marking information before finalizing procurement specifications.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this part when a fixed 2.3V rail is required with minimal footprint constraints due to the small DFN package. The inclusion of the discharge feature makes it suitable for systems requiring fast power-down sequences. Verify that the input voltage remains within the 1.7V to 5.25V range during all operating conditions. Consider the thermal resistance values if the application involves high ambient temperatures or continuous full-load operation to ensure junction temperature limits are not exceeded.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to the AP7343 family of low dropout regulators designed for low-power handheld communication equipment. The series offers various fixed output voltages ranging from 0.9V to 3.6V. The AP7343D variant specifically integrates an output discharge resistor, distinguishing it from the standard AP7343 model which lacks this feature. The FS4 suffix denotes the X2-DFN1010-4 package, providing a dense PCB layout solution compared to larger packages like SOT25.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

AP7343-23FS4-7B serves as a direct functional substitute but lacks the integrated output discharge feature found in the AP7343D variant.