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Product Detailed Parameters
- Description：IC REG LINEAR 1.2V 1.35A SOT-223
- Series：-
- Mfr：Diotec Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.2V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.25V @ 1A
- Current - Output：1.35A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：-
- Control Features：Current Limit
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223
- Grade：-
- Qualification：-
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Overview
The Diotec Semiconductor LDI1117-1.2H is a fixed-output low dropout linear voltage regulator housed in a SOT-223 surface-mount package. It provides a nominal output voltage of 1.2 V with a tolerance of ±1%. The device supports a maximum output current of 1.35 A and accepts input voltages up to 15 V. Key electrical parameters include a maximum dropout voltage of 1.25 V at full load, a typical power supply rejection ratio of 50 dB, and a quiescent current of 10 mA. It operates within a junction temperature range of -40°C to +125°C.
Feature Summary
- Fixed 1.2 V output voltage with high precision
- Integrated thermal overload and current limit protection
- High power supply rejection ratio for noise reduction
Applications
- Battery-powered portable electronic devices
- Embedded systems requiring stable low-voltage rails
- Post-regulation stages for DC-DC converters
Procurement Notes
Verify the specific suffix 'H' corresponds to the RoHS-compliant version and SOT-223 packaging configuration. Confirm that the required output current does not exceed the 1.35 A absolute maximum rating under all operating conditions. Ensure thermal management strategies account for the power dissipation limits inherent to the SOT-223 package during continuous operation.
Selection Notes
Select this component when a precise 1.2 V rail is required from higher voltage sources. Consider the 1.25 V dropout voltage to ensure sufficient input-output differential. Evaluate the thermal performance based on the expected load current and ambient temperature constraints within the target application environment.
Part Context
This part belongs to the LDI1117 series of low dropout regulators manufactured by Diotec Semiconductor. The series offers various fixed output voltages in SOT-223 and SOT-89 packages. The LDI1117-1.2H specifically targets applications needing a stable 1.2 V supply with integrated protection features.
Replacement Considerations
LDI1117-1.2U (SOT-89 package variant)
FAQ
What is the maximum input voltage allowed?
The maximum input voltage is 15 V.
Does the device include protection circuits?
Yes, it includes internal thermal overload and current limit protection.
