AP7343-295FS4-7B

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

The AP7343-295FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a nominal output voltage of 2.95V with a maximum guaranteed 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 control, thermal shutdown protection, and fold-back short-circuit current limiting. It is housed in an X2-DFN1010-4 (Type B) package.

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

• Integrated enable pin allows precise on/off control of the regulator output
• Built-in thermal shutdown and fold-back short-circuit protection ensure operational safety under fault conditions
• Low quiescent current consumption supports extended battery life in portable applications
• High ripple rejection and low output noise maintain signal integrity for sensitive RF circuits

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

• RF power supplies
• Smartphones and tablets
• Portable media players
• Wireless communication adapters

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

Verify the specific ordering suffix FS4-7B corresponds to the required X2-DFN1010-4 Type B package and tape-and-reel quantity. Confirm that the non-discharge variant meets system requirements if active output discharge is not needed. Ensure compatibility with RoHS 3 and halogen-free material specifications before finalizing procurement orders.

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

Select this component when a stable 2.95V rail is required with minimal footprint constraints. The X2-DFN1010-4 package offers dense PCB layout capabilities suitable for space-constrained handheld devices. Consider the 300mA current limit and dropout characteristics relative to the minimum expected input voltage and load profile.

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

This part belongs to the AP7343 family of 300mA high PSRR low-noise LDOs. The series includes various fixed output voltages ranging from 0.9V to 3.6V and different package options including SOT25. The AP7343D variant adds an internal output discharge feature, whereas the standard AP7343 does not include this function.

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

AP7343-295FS4-7A is available in the same package but may differ in packaging quantity or identification code.

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

Does the AP7343-295FS4-7B include an internal output discharge resistor?

No, the standard AP7343 part number without the 'D' suffix does not include an internal output discharge resistor. The AP7343D variant provides this feature.

What is the recommended capacitor configuration for stability?

The datasheet recommends using ceramic capacitors with low ESR. A minimum 0.47μF input capacitor and a 1μF output capacitor are typically suggested for optimal transient response and stability.