LDK120DM33R STMicroelectronics Integrated Circuit (SOT23 (5-Pin)) In Stock
LDK120DM33R is a 200 mA fixed 3.3 V LDO regulator with very low quiescent current and ultra-low noise, housed in a 5-pin SOT-23 package. It accepts input voltages from 4.3 V to 5.5 V with a 1 V dropout and features RoHS-compliant lead-free finish. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LDK120DM33R Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1364(MOQ 100)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LDK120DM33R?
- 200 mA output current capability in a compact SOT-23 (5-pin) footprint enables space-efficient power rails in portable and handheld designs
- Very low quiescent current minimizes standby power drain, extending battery life in always-on IoT sensors and wearable devices
- Ultra-low output noise makes the LDK120DM33R ideal for noise-sensitive RF, audio, and precision analog circuits powered from a 3.3 V rail
- 1 V dropout voltage at 200 mA with a 4.3–5.5 V input range suits direct post-regulation from USB 5 V or single-cell Li-ion charger outputs
What is LDK120DM33R used for?
The LDK120DM33R is well suited for generating a clean 3.3 V rail in battery-powered wearables, IoT sensor nodes, and portable medical devices where low quiescent current and low noise are critical for long battery life and accurate analog measurements. Its 200 mA current budget covers microcontrollers, Bluetooth or Wi-Fi modules, and associated peripherals operating from a 5 V USB or regulated supply. The ultra-low noise characteristic also makes it a reliable post-regulator for RF front-ends and precision ADC reference supplies that demand minimal spectral contamination.
What are the specifications of LDK120DM33R?
| Factory Lead Time | 16Weeks |
| YTEOL | 8 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 1V |
| Input Voltage Absolute-Max | 7V |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 4.3V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Line Regulation-Max | 0.00198% |
| Load Regulation-Max | 0.039402% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.2A |
| Output Voltage1-Max | 3.399V |
| Output Voltage1-Min | 3.201V |
| Output Voltage1-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR, 7 INCH |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BCD |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Voltage Tolerance-Max | 3% |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Where can I find the LDK120DM33R datasheet?
LDK120DM33R Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for LDK120DM33R?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum output current and dropout voltage of the LDK120DM33R under full load?
The LDK120DM33R delivers up to 200 mA of output current with a typical dropout voltage of 1 V, meaning the input supply must be at least 4.3 V to maintain a regulated 3.3 V output. This makes it practical for USB-powered or Li-ion battery applications where headroom is limited.
For a noise-sensitive RF module powered at 3.3 V, why is the LDK120DM33R a strong regulator choice?
The LDK120DM33R features very low output noise, which is essential for RF front-ends and phase-locked loops sensitive to power-supply spectral content. Combined with its 200 mA current rating and a 1 V dropout from a 4.3–5.5 V input, it provides a stable, quiet 3.3 V rail without introducing in-band noise that would degrade receiver sensitivity or phase noise performance.
What input voltage range does the LDK120DM33R support, and is it compatible with a 5 V USB power supply?
The device accepts input voltages from 4.3 V minimum to 5.5 V maximum, with an absolute maximum of 7 V. A standard 5 V USB supply falls comfortably within this range, allowing direct post-regulation to 3.3 V at up to 200 mA without external voltage conditioning or additional pre-regulators.
Which package does the LDK120DM33R use, and how does its size benefit compact PCB layouts?
The LDK120DM33R is housed in a 5-pin SOT-23 package (JESD-30 code R-PDSO-G5), one of the smallest surface-mount regulator footprints available. This allows designers to place the 3.3 V regulator within 2–3 mm of the load IC, reducing trace inductance and improving transient response on noise-sensitive boards.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $0.1900 | $19.00 |
| 250+ | $0.1800 | $45.00 |
| 500+ | $0.1700 | $85.00 |
| 1000+ | $0.1699 | $169.90 |
| 10000+ | $0.1515 | $1515.00 |
| 15000+ | $0.1364 | $2045.55 |
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