AP7335A-33W5-7

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

The AP7335A-33W5-7 is a fixed-output low-dropout linear regulator manufactured by Diodes Incorporated. It provides a stable 3.3V output with ±1% accuracy and supports up to 300mA load current. The device features a typical quiescent current of 35µA and high power supply rejection ratio (PSRR) of 65dB at 1kHz. It operates within an input voltage range of 4.3V to 6V and includes built-in current limit, thermal shutdown, and short-circuit protection. The component is housed in a SOT25 package.

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

• Ultra-fast start-up time enables rapid transitions between standby and active modes for battery-powered devices.
• Integrated enable pin allows precise control over regulator operation with low logic thresholds.
• Stable performance maintained with small ceramic output capacitors having low equivalent series resistance.
• Comprehensive protection circuitry safeguards against overcurrent, short circuits, and overheating.

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

• Smart phones
• MP3/MP4 players
• Bluetooth headsets
• Battery chargers

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

Verify the specific ordering suffix W5 confirms the SOT25 package type when sourcing. Confirm RoHS compliance and lead-free status requirements match project specifications. Ensure the fixed 3.3V output variant aligns with system voltage rails. Check datasheet revision history for any updates to electrical characteristics or recommended operating conditions prior to final design approval.

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

Select this regulator for applications requiring fast transient response and low ground current consumption. Suitable for GSM baseband circuits where load transitions occur rapidly between microamps and hundreds of milliamps. Verify that the input voltage remains above the minimum dropout threshold under all load conditions. Consider thermal dissipation calculations based on ambient temperature and PCB copper area to prevent thermal shutdown.

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

This component belongs to the AP7335A family of low-dropout linear regulators designed for portable electronics. It offers a fixed 3.3V output option alongside other voltage variants. The series emphasizes low quiescent current and fast startup times to extend battery life in mobile devices. Packaging options include SOT25 and U-DFN2020-6 for space-constrained designs.

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

AP7335A-33SN-7 serves as a direct functional substitute using the U-DFN2020-6 package instead of SOT25. Both variants share identical electrical characteristics and pinouts relative to their respective packages. Verify footprint compatibility during replacement planning.

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

What is the minimum required output capacitance for stability?

The device is stable with a minimum ceramic output capacitor value of 1µF, provided it has an equivalent series resistance greater than 15mΩ.

How does the enable pin function?

The EN pin turns the regulator on when set to a logic high level (above 1.4V) and off when pulled low (below 0.4V). If unused, it should be tied to the input voltage.

What happens during a thermal shutdown event?

When the junction temperature reaches approximately +145°C, the output disables. The device re-enables automatically once the temperature drops to approximately +130°C.