S-1111B32MC-NYRTFG

Overview

The S-1111B32MC-NYRTFG is a positive voltage regulator from the S-1111/1121 Series, manufactured by ABLIC Inc. It provides a fixed output voltage of 3.2 V with an accuracy of ±1.0%. The device operates within an input voltage range of 2.0 V to 6.5 V and supports an output current of up to 150 mA. It features a typical dropout voltage of 200 mV at 100 mA and a ripple rejection ratio of 70 dB at 1.0 kHz. Current consumption is 35 μA during operation and 0.1 μA during power-off. The component is housed in a lead-free SOT-23-5 package.

Feature Summary

• Built-in low on-resistance transistor enables low dropout voltage and large output current capability.
• Integrated overcurrent protection circuit prevents load current from exceeding the output transistor's capacity.
• ON/OFF circuit allows for significant reduction in current consumption to extend battery life.
• High ripple rejection performance ensures stable regulation against input noise.

Applications

• Power supply for battery-powered devices
• Power supply for personal communication devices
• Power supply for home electric/electronic appliances
• Power supply for cellular phones

Procurement Notes

Verify the specific ordering suffix NYR to confirm the ON/OFF pin logic type (positive logic) and environmental code (lead-free, halogen-free). Confirm the package designation MC corresponds to the SOT-23-5 form factor. Check for any manufacturer discontinuance notifications or obsolescence warnings prior to finalizing procurement plans.

Selection Notes

Ensure the input voltage remains within the specified 2.0 V to 6.5 V range while accounting for dropout requirements. Select an output capacitor with an ESR between 0.5 Ω and 5 Ω, preferably a tantalum type, to maintain stability. Verify that the board layout minimizes impedance for VIN, VOUT, and GND pins to prevent oscillation and ensure accurate voltage regulation under varying load conditions.

Part Context

This component belongs to the S-1111/1121 Series of high ripple-rejection low dropout CMOS voltage regulators developed by Seiko Instruments Inc. (now ABLIC). The series utilizes CMOS technology to achieve high accuracy and low current consumption. The S-1111 variant differs from the S-1121 primarily in its pin configuration, specifically the placement of the input and output pins.

Replacement Considerations

S-1111B32MC-NYATFG: Identical electrical specifications but features negative logic for the ON/OFF pin instead of positive logic.

FAQ

What is the function of the NC pin on the S-1111B32MC-NYRTFG?

The NC pin is electrically open. It can be connected to the VIN pin or the VSS pin if necessary for mounting purposes, but it does not serve an active electrical function.

How does the ON/OFF pin control the regulator?

For the 'B' type product like this model, setting the ON/OFF pin to a High level activates the regulator, while setting it to a Low level stops operation, reducing current consumption to the power-off level.