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LD3985M122R
Positive 1.22V Low Dropout Regulator with 0.55A Output Current in 5-Pin SOT-23 Package
LD3985M122R
Positive 1.22V Low Dropout Regulator with 0.55A Output Current in 5-Pin SOT-23 Package
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Manufacturer Part # : LD3985M122R
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Package/Case: SOT23-5
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Brand: STMicroelectronics
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Product Categories : Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
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Service & Packaging
Service & Packaging
About After Sales Service
All Parts Extended Quality Guarantee
Initiate the application within 90 days from the shipment date.
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LD3985M122R DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
The LD3985M122R is a versatile and efficient voltage regulator that caters to a wide range of applications. With the ability to provide up to 150 mA from input voltages ranging from 2.5 V to 6 V, this regulator is well-suited for low power applications and battery-powered systems. Its ultra-low dropout voltage, low quiescent current, and minimal noise ensure optimal performance, making it perfect for power-sensitive devices
Key Features
- Ultra-low noise operation
- Robust and reliable performance
- Precise voltage regulation
- Safe and secure shutdown
Application
- Portable electronic devices
- Smartphones
- Tablets
- Digital cameras
- Wearable devices
- Wireless modules
- Medical devices
- Industrial applications
- Automotive systems
- Any application requiring a low dropout voltage regulator with high efficiency and low noise
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Part Life Cycle Code | Active | Part Package Code | SOT-23 |
| Pin Count ! | 5 | Reach Compliance Code | compliant |
| ECCN Code | EAR99 | HTS Code ! | 8542.39.00.01 |
| Factory Lead Time | 54 Weeks | Adjustability | FIXED |
| Dropout Voltage1-Max | 0.1 V | Dropout Voltage1-Nom | 0.06 V |
| Input Voltage Absolute-Max | 6 V | Input Voltage-Max | 6 V |
| Input Voltage-Min | 2.5 V | JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 | Length | 2.9 mm |
| Line Regulation-Max | 0.00427% | Load Regulation-Max | 0.0145% |
| Moisture Sensitivity Level | 1 | Number of Functions | 1 |
| Number of Outputs | 1 | Number of Terminals | 5 |
| Operating Temperature TJ-Max | 125 °C | Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.15 A | Output Voltage1-Max | 1.295 V |
| Output Voltage1-Min | 1.145 V | Output Voltage1-Nom | 1.22 V |
| Package Body Material | PLASTIC/EPOXY | Package Code | LSSOP |
| Package Equivalence Code | TSOP5/6,.11,37 | Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH | Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 | Qualification Status ! | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | Seated Height-Max | 1.45 mm |
| Surface Mount ! | YES | Technology | BICMOS |
| Terminal Finish | MATTE TIN | Terminal Form ! | GULL WING |
| Terminal Pitch ! | 0.95 mm | Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 | Voltage Tolerance-Max | 6.15% |
| Width | 1.625 mm |
Specification Comparison
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is LD3985M122R?
The LD3985M122R is a low dropout voltage regulator designed by STMicroelectronics. It is a high-performance voltage regulator capable of delivering a fixed output voltage with a low dropout voltage, making it ideal for applications requiring stable and reliable power supply.
How Does LD3985M122R Work?
The LD3985M122R works by regulating the input voltage to provide a stable output voltage. It maintains the output voltage within a specified range even when the input voltage decreases, thus ensuring a consistent power supply for connected devices. The low dropout voltage feature allows the regulator to operate effectively even when the input voltage is very close to the output voltage.
How Many Pins does LD3985M122R have and What are the Functions of the Pinout Configuration?
The LD3985M122R is housed in a small 5-lead D2PAK package. The pinout configuration includes:
- IN: Input voltage pin.
- GND: Ground pin.
- SHDN: Shutdown pin for enabling or disabling the regulator.
- OUT: Output voltage pin.
- ADJ: Voltage adjustment pin for selecting the output voltage.
What are the Pros and Cons of LD3985M122R?
Pros:
- Low Dropout Voltage: Operates with a low dropout voltage, ensuring efficient power conversion.
- Stability: Provides a stable output voltage even under varying load conditions.
- Thermal Protection: Includes thermal shutdown protection to prevent overheating.
- Fixed Output Voltage: Offers a fixed output voltage for easy integration into circuits.
- Compact Package: The 5-lead D2PAK package is space-efficient and suitable for small designs.
Cons:
- Limited Adjustability: The fixed output voltage may not be suitable for applications requiring adjustable outputs.
- Heat Dissipation: May require additional heat sinking for high-power applications.
- External Components: Some applications may need additional external components for optimal performance.
Are There Any Equivalents/Alternatives to LD3985M122R for Recommendation?
- The LM2937 from Texas Instruments is an equivalent low dropout voltage regulator.
- Alternatives to the LD3985M122R include the MCP1700 from Microchip Technology and the LP2950 from STMicroelectronics.
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