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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 200MA SOT23-5
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：1.2V
- Voltage - Output (Max)：12V
- Voltage Dropout (Max)：0.35V @ 200mA
- Current - Output：200mA
- Current - Quiescent (Iq)：90 µA
- Current - Supply (Max)：100 µA
- PSRR：88dB ~ 48dB (120Hz ~ 10kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The LDK320AM-R is a positive adjustable low-dropout linear voltage regulator manufactured by STMicroelectronics, housed in an SOT-23-5 surface-mount package. It delivers up to 200 mA output current with an input voltage range of 2.5 V to 18 V. The device features a typical dropout voltage of 100 mV at 100 mA and a maximum dropout of 350 mV at 200 mA. Quiescent current is typically 60 µA, dropping below 1 µA in shutdown mode via the enable pin. Output voltage tolerance is ±0.5% at 25 °C for the 'A' variant. Supply voltage rejection ratio reaches 88 dB at 120 Hz. Operating junction temperature spans -40 °C to 125 °C.
Feature Summary
- Logic-controlled electronic shutdown enables ultra-low power consumption in off-mode.
- Integrated short-circuit current limiting, thermal protection, and Safe Operating Area (SOA) safeguards.
- Compatible with ceramic output capacitors as small as 1 µF for stability.
Applications
- Digital Signal Controllers (DSC)
- Television systems
- Blu-ray and DVD players
- Personal computers
- Industrial equipment
Procurement Notes
Verify the specific suffix 'AM-R' against the manufacturer's official datasheet to confirm the adjustable output configuration and tape-and-reel packaging format. Ensure the design accounts for the SOT-23-5 thermal resistance characteristics within the intended operating temperature range. Confirm RoHS compliance status matches project requirements before finalizing procurement orders.
Selection Notes
Select this component when a high-accuracy adjustable regulator is required with minimal quiescent current draw. The SOT-23-5 package suits space-constrained designs. Verify that the load current does not exceed 200 mA and that the input-to-output differential remains within the specified dropout limits for optimal regulation performance under varying thermal conditions.
Part Context
This part belongs to the LDK320 series of low-dropout regulators designed for battery-powered applications requiring high PSRR and low noise. The series includes fixed and adjustable variants available in SOT-23-5L and SOT-89 packages. The 'A' designation indicates tighter output voltage tolerance compared to standard versions.
Replacement Considerations
Consult the manufacturer's official documentation for confirmed substitute part numbers. Cross-reference pinouts and electrical specifications carefully when considering alternatives from other manufacturers.
FAQ
Is the LDK320AM-R compatible with ceramic output capacitors?
Yes, the device is stabilized with ceramic capacitors on the output, specifically compatible with COUT = 1 µF.
How does the enable pin function affect power consumption?
The logic-controlled enable pin allows the device to enter shutdown mode, consuming less than 1 µA total current when disabled.
