AP7313-12SAG-7

Overview

The AP7313-12SAG-7 is a fixed-output low dropout linear regulator manufactured by Diodes Incorporated. It provides a stable 1.2V output with a maximum continuous load current of 150mA. The device operates within an input voltage range of 2V to 6V and maintains stability using only a 1µF ceramic output capacitor. Key electrical parameters include a typical quiescent current of 65µA, a power supply rejection ratio (PSRR) of 65dB at 100Hz, and a typical dropout voltage of 150mV at full load. It features fast transient response and a start-up time of approximately 80µs.

Feature Summary

• Integrated protection mechanisms including current limit, short circuit, and thermal shutdown to prevent damage during fault conditions.
• Fast transient response capability designed to handle rapid load transitions without significant voltage overshoot or undershoot.
• Ultra-fast start-up time allowing the device to provide full power in tens of microseconds after activation.
• Low quiescent current consumption across the entire input voltage and output loading range.

Applications

• Battery powered devices
• Portable Devices
• Notebook and Desktop Computers and Peripherals

Procurement Notes

Verify that the component matches the specific SOT23 package configuration and the 1.2V fixed output designation. Confirm compliance with RoHS standards and ensure the ordering suffix corresponds to tape and reel packaging for automated assembly processes. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity before procurement.

Selection Notes

Select this regulator when a compact solution is required for low-power applications needing a precise 1.2V rail. Ensure the input voltage remains between 2V and 6V and that the load does not exceed 150mA. Verify that the application environment stays within the -40°C to 85°C operating temperature range and that PCB layout allows for minimal trace lengths to the output capacitor.

Part Context

This component belongs to the AP7313 series of low dropout regulators from Diodes Incorporated. The series offers various fixed output voltages ranging from 1.0V to 3.3V. All variants share similar electrical characteristics, including 150mA output capability and low quiescent current, but differ in their internal resistor networks to set the specific output voltage level.

Replacement Considerations

Compatible substitutes within the same family include AP7313-10SAG-7, AP7313-15SAG-7, and AP7313-18SAG-7, provided the system design accommodates the respective different fixed output voltages of 1.0V, 1.5V, and 1.8V.

FAQ

What type of output capacitor is recommended for stability?

The device is stable with a low ESR 1µF ceramic output capacitor. Recommended capacitance ranges from 1µF to 4.7µF with X7R or X5R temperature characteristics.

How does the device protect against overheating?

Thermal shutdown protection disables the output when the junction temperature rises to approximately +140°C. The output re-enables when the temperature drops to approximately +125°C.

Is a minimum load current required for regulation?

No, no minimum load is required to keep the device stable. The regulator remains stable and regulated even under no-load conditions.