AP7343D-16W5-7

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

The AP7343D-16W5-7 is a CMOS low dropout regulator featuring high output voltage accuracy, low on-resistance, and high power supply rejection ratio. It provides a fixed 1.6V output with a guaranteed load current of 300mA. The device operates within an input voltage range of 1.7V to 5.25V and maintains a quiescent current as low as 35µA. Packaged in SOT25, it includes thermal shutdown and short-circuit protection.

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

• Integrated enable pin for precise power management control
• Built-in auto-discharge circuitry for rapid output voltage decay upon shutdown
• High ripple rejection capability suitable for noise-sensitive RF applications

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

• RF power supplies
• Portable media players
• Wireless communication devices

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

Verify the specific suffix 'D' indicates the inclusion of the output discharge feature, distinguishing it from standard variants. Confirm the 'W5' suffix corresponds to the SOT25 package type required for your PCB layout. Ensure compatibility with the 1.6V fixed output specification before finalizing procurement orders.

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

Select this component when a fixed 1.6V rail is required with minimal footprint constraints. The SOT25 package offers a compact solution for dense layouts. Consider the integrated discharge feature if rapid power-down is necessary. Verify that the input voltage remains within the 1.7V to 5.25V operational range for stable regulation.

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

This part belongs to the AP7343 series of low-power LDOs designed for handheld equipment. It utilizes a CMOS process to achieve low static current and high PSRR. The series supports various fixed output voltages and packages, including X2-DFN1010-4 and SOT25, catering to diverse space and performance requirements.

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

AP7343-16W5-7 (Non-discharge variant)

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 device includes an internal auto-discharge resistor connected to the output, which rapidly pulls down the output voltage when the enable pin is deactivated.

How does the enable pin operate?

The regulator is turned on by driving the EN pin high and enters shutdown mode when pulled low. It must not be left floating to ensure proper operation.