LD56100DPU115R STMicroelectronics Integrated Circuit (Other) In Stock
The LD56100DPU115R is a 1 A very low dropout linear regulator from STMicroelectronics with a 0.65 V dropout voltage, ultra-low noise output, and fast transient response. It accepts input voltages from 1.8 V to 5.5 V and delivers 1.15 V fixed output, making it ideal for powering noise-sensitive RF and analog circuits.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 9
- Lifecycle
- ACTIVE
- Datasheet
- LD56100DPU115R Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LD56100DPU115R?
- 1 A output current with only 0.65 V dropout voltage for high-efficiency low-headroom designs
- Ultra-low output noise enabling clean supply rails for RF, ADC, and PLL circuits
- Fast transient response minimizing voltage excursions during rapid load steps
- Input voltage range of 1.8 V to 5.5 V compatible with a wide variety of system rails
- Fixed 1.15 V output with line regulation better than 0.003% for stable analog supply
- MSOP-8 package (JESD-30 R-PDSO-N8) offering small SMT footprint for compact power designs
What is LD56100DPU115R used for?
The LD56100DPU115R is optimized for powering noise-sensitive analog and RF subsystems in communications equipment, wearable electronics, and portable instrumentation where low noise and minimal dropout are critical. It is also well suited as a post-regulator after a switching converter in mixed-signal designs where the switching noise must be filtered before reaching ADCs, PLLs, or VCOs.
What are the specifications of LD56100DPU115R?
| YTEOL | 7 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 0.65V |
| Input Voltage Absolute-Max | 7V |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 1.8V |
| JESD-30 Code | R-PDSO-N8 |
| Line Regulation-Max | 0.002208% |
| Load Regulation-Max | 0.006% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 1.1615V |
| Output Voltage1-Min | 1.127V |
| Output Voltage1-Nom | 1.15V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC8,.05,16 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.4mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Voltage Tolerance-Max | 2% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mainland China |
Where can I find the LD56100DPU115R datasheet?
LD56100DPU115R Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for LD56100DPU115R?
Compatible alternatives and drop-in replacements for LD56100DPU115R:
Frequently Asked Questions
How does the 0.65 V dropout voltage of LD56100DPU115R benefit battery-powered designs with a 1.8 V input rail?
With a dropout voltage of only 0.65 V, the LD56100DPU115R continues regulating a 1.15 V output even when the input rail drops to 1.8 V. This extends usable battery life by allowing the system to operate closer to cell depletion, which is especially valuable in wearables or IoT nodes running from a single Li-ion or coin cell.
For an RF front-end power supply, how does LD56100DPU115R's noise performance compare to a standard LDO?
The LD56100DPU115R is characterized as ultra-low noise, which means its output noise spectral density is significantly lower than general-purpose LDOs in the 10 Hz to 100 kHz band. This makes it suitable for supplying VCOs and PLLs where supply-rail noise translates directly to phase noise, helping designs meet spectral purity targets in cellular and wireless LAN applications.
What is the maximum input voltage for LD56100DPU115R, and does it include over-voltage protection?
The LD56100DPU115R accepts a maximum continuous input voltage of 5.5 V, with an absolute maximum of 7 V for transient events. The device includes internal protection circuitry, so brief supply spikes up to 7 V during hot-plug or inrush events will not immediately damage the regulator, though sustained operation above 5.5 V is not recommended.
In a compact PCB layout, what package and pin count does LD56100DPU115R use, and does it require external capacitors?
LD56100DPU115R is housed in an 8-pin MSOP package (JESD-30 R-PDSO-N8) with a small body that suits space-constrained boards. Like most LDOs, it requires a small input bypass capacitor and an output capacitor, typically in the 1 µF to 10 µF range, to ensure stability and optimal transient performance across the 1 A load range.
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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.
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