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Product Detailed Parameters
- Description：IC REG LINEAR 3.4V 150MA SOT23-5
- Series：S-1111
- Mfr：ABLIC Inc.
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：6.5V
- Voltage - Output (Min/Fixed)：3.4V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.26V @ 100mA
- Current - Output：150mA
- Current - Quiescent (Iq)：1 µA
- Current - Supply (Max)：65 µA
- PSRR：70dB (1kHz)
- Control Features：Enable
- Protection Features：Over Current
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
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Overview
The S-1111B34MC-NYTTFG is a positive fixed linear voltage regulator from the S-1111 series, manufactured by ABLIC Inc. (formerly Seiko Instruments). It provides a nominal output voltage of 3.4 V with an accuracy of ±1.0%. The device supports an output current of up to 150 mA and features a typical dropout voltage of 200 mV at 100 mA. It operates within an input voltage range of 2.0 V to 6.5 V and includes built-in overcurrent protection and an ON/OFF control pin for power management.
Feature Summary
- Built-in low on-resistance P-channel MOS FET output transistor enables low dropout voltage operation.
- Integrated ON/OFF circuit allows significant reduction in current consumption during standby mode.
- Internal overcurrent protection circuit limits output current to prevent damage under fault conditions.
Applications
- Power supply for battery-powered devices
- Power supply for personal communication devices
- Power supply for home electric/electronic appliances
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific ordering suffix matches the required environmental specifications, such as lead-free and halogen-free status. Ensure the source documentation aligns with the exact part number to avoid discrepancies in pin configuration or electrical characteristics.
Selection Notes
Select this component when a stable 3.4 V rail is required with minimal voltage drop across the regulator. Consider the package thermal dissipation capabilities if operating near maximum load currents. Verify that the external output capacitor meets the equivalent series resistance requirements to ensure stability and prevent oscillation.
Part Context
This device belongs to the S-1111/1121 series of high ripple-rejection low dropout CMOS voltage regulators. The S-1111 variant utilizes a specific pinout distinct from the S-1121 series. These regulators are designed for applications requiring precise voltage regulation with low quiescent current consumption.
Replacement Considerations
Direct substitutes include other S-1111 series parts with identical 3.4 V output and compatible pin configurations. Cross-reference with S-1121 series components only if pin reassignment is acceptable in the design. Verify that alternative parts meet the same ripple rejection and dropout voltage specifications.
FAQ
How does the ON/OFF pin function in the S-1111B34MC-NYTTFG?
The ON/OFF pin controls the operation of the internal circuit. For Type B products like this one, applying a high-level signal activates the regulator, while a low-level signal shuts it down, significantly reducing current consumption.
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 capacitor must have an equivalent series resistance (ESR) within the optimal range to prevent oscillation.
