AP7343D-23W5-7

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

The AP7343D-23W5-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 2.3V with a guaranteed maximum output current of 300mA. It operates within an input voltage range of 1.7V to 5.25V and features high power supply rejection ratio (PSRR) of 75dB at 1kHz alongside low output noise of 60µVrms from 10Hz to 100kHz. The device incorporates an integrated discharge resistor for rapid output voltage decay upon shutdown, ensuring safe system states. Packaged in the compact SOT-25-5 surface-mount format, it maintains strict output voltage accuracy of ±1% across the specified operating temperature range of -40°C to +85°C.

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

• Integrated auto-discharge circuitry ensures rapid output voltage decay when the enable pin is deactivated.
• High ripple rejection capability effectively suppresses input power supply noise at critical frequencies.
• Low quiescent current consumption supports extended battery life in portable electronic applications.
• Built-in thermal shutdown and fold-back current limiting protect the device under fault conditions.

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

• RF power supply circuits
• Portable video devices
• Wireless communication modules

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

Verify that the specific part number suffix corresponds to the required package type and tape-and-reel quantity before finalizing orders. Confirm compliance with RoHS directives and halogen-free requirements if mandated by project specifications. Ensure the design accounts for the specific thermal resistance characteristics of the SOT-25 package to maintain junction temperatures within absolute maximum ratings during operation.

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

Select this component when a precise 2.3V rail is required with minimal footprint constraints. The 'D' suffix indicates the inclusion of an output discharge feature, which is essential for systems requiring fast power-down sequencing. Compare dropout voltage specifications against the minimum available input voltage headroom to ensure stable regulation under all load conditions.

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

This device belongs to the AP7343 family of CMOS low dropout regulators designed for low-power handheld equipment. The series offers various fixed output voltages ranging from 0.9V to 3.6V. The AP7343D variant specifically includes an internal discharge path, distinguishing it from the standard AP7343 model which lacks this feature. Both variants share identical electrical performance regarding line regulation, load regulation, and noise characteristics.

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

AP7343-23W5-7 serves as the non-discharge equivalent within the same package and electrical specification set.

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

What is the function of the 'D' suffix in the part number?

The 'D' suffix indicates that the regulator includes an integrated N-channel auto-discharge resistor connected between the output and ground, allowing the output voltage to decay rapidly when the device is disabled.

How does the enable pin control the device operation?

Driving the EN pin high activates the regulator, while pulling it low disables the output and engages the discharge resistor to bleed off stored charge on the output capacitor.