S-1111B47MC-NZGTFG

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

The S-1111B47MC-NZGTFG is a fixed positive LDO regulator from the S-1111/1121 Series by ABLIC Inc. It provides a nominal output voltage of 4.7 V with ±1.0% accuracy. The device features a typical dropout voltage of 200 mV at 100 mA and supports an output current up to 150 mA when VIN ≥ VOUT + 1.0 V. Current consumption is 35 μA typ. during operation and 0.1 μA typ. in power-off mode. It includes built-in overcurrent protection and an ON/OFF circuit, housed in a lead-free SOT-23-5 package.

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

• Built-in low on-resistance P-channel MOS FET output transistor enables low dropout voltage performance.
• Integrated overcurrent protection circuit limits load current to prevent damage to the output transistor.
• Dedicated ON/OFF pin allows complete shutdown of internal circuits for extended battery life in portable applications.

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

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

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance and environmental codes (U/G) match project requirements. Review datasheet revision history for updates. Ensure ESD handling protocols are followed during storage and assembly. Validate package marking against official specifications.

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

Select this part for designs requiring a stable 4.7 V rail with minimal voltage drop under moderate loads. Consider thermal dissipation limits when operating near maximum current. Verify input voltage range accommodates source variations. Evaluate external capacitor ESR requirements for stability. Check ON/OFF logic compatibility with control signals.

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

This component belongs to the S-1111/1121 Series of high ripple-rejection, low dropout CMOS voltage regulators manufactured by Seiko Instruments Inc. (now ABLIC). The series offers selectable output voltages from 1.5 V to 5.5 V in 0.1 V steps. The S-1111 variant uses a specific pinout distinct from the S-1121 series within the same SOT-23-5 package.

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

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other S-1111 series variants only if electrical parameters and pin configurations align exactly. Consult manufacturer for obsolescence notices as the series is marked 'NOT RECOMMENDED FOR NEW DESIGN'.

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

What is the function of the NC pin on the S-1111B47MC-NZGTFG?

Pin 4 is designated as NC (No Connection) and is electrically open. It can be connected to the VIN or VSS pin if needed for mechanical stability, but it serves no electrical function.

How does the ON/OFF pin operate for the 'B' type product?

For the 'B' type (positive logic), setting the ON/OFF pin to a High level turns the regulator ON, while a Low level turns it OFF. When OFF, current consumption drops significantly.

What type of output capacitor is recommended for stable operation?

A tantalum capacitor with a capacitance of 2.2 μF or more is recommended. The equivalent series resistance (ESR) should ideally be between 0.5 Ω and 5 Ω to ensure phase compensation stability.