LD56100DPU185R STMicroelectronics Integrated Circuit (Other) In Stock
LD56100DPU185R is a 1A very low dropout (VDO 195 mV typical) fast-transient ultra-low noise fixed-output linear regulator from STMicroelectronics supporting 2.35 V to 5.5 V input. Offered in an 8-pin TSSOP package with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 9
- Lifecycle
- ACTIVE
- Datasheet
- LD56100DPU185R Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LD56100DPU185R?
- Ultra-low dropout voltage of only 195 mV typical at 1A output enables use with tight supply margins and battery-powered systems
- Fast transient response minimizes output voltage excursion during sudden load steps, protecting sensitive RF and analog circuits
- Ultra-low output noise suits noise-sensitive ADC reference, PLL supply, and RF front-end power applications
- Excellent load regulation of 0.006% maximum ensures stable output voltage across the full 0 to 1A load range
What is LD56100DPU185R used for?
The LD56100DPU185R is ideally suited for powering noise-sensitive analog front-ends including ADC reference rails, RF transceivers, and PLL power supplies where low output noise below tens of µV RMS is mandatory. Its fast transient response and ultra-low dropout of 195 mV make it a strong choice for battery-powered IoT devices and portable instruments where input headroom is limited. The fixed 1.85 V output at 1A also serves as a core supply for low-voltage FPGAs, MCU I/O banks, and DDR memory rails.
What are the specifications of LD56100DPU185R?
| YTEOL | 7.3 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.28V |
| Dropout Voltage1-Nom | 0.195V |
| Input Voltage Absolute-Max | 7V |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.35V |
| JESD-30 Code | R-PDSO-N8 |
| Line Regulation-Max | 0.0029415% |
| 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 | 1.8685V |
| Output Voltage1-Min | 1.813V |
| Output Voltage1-Nom | 1.85V |
| 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 LD56100DPU185R datasheet?
LD56100DPU185R Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for LD56100DPU185R?
Compatible alternatives and drop-in replacements for LD56100DPU185R:
Frequently Asked Questions
What is the dropout voltage of LD56100DPU185R at full 1A load and why does this matter for battery applications?
The LD56100DPU185R has a typical dropout voltage of 195 mV and a maximum of 280 mV at 1A output. In battery-powered designs, this low headroom means the regulator maintains a stable 1.85 V output even when the battery discharges to approximately 2.1 V, extending usable battery life compared to conventional LDOs that require 500 mV or more of headroom.
How does the ultra-low noise characteristic of LD56100DPU185R benefit RF and precision analog circuits?
The LD56100DPU185R features ultra-low output noise, making it well suited to power RF amplifiers, voltage-controlled oscillators, PLLs, and precision ADC reference inputs where power-supply noise directly degrades phase noise or SNR performance. Regulators with high output noise inject ripple into these blocks, raising the noise floor by several µV RMS and degrading signal integrity in measurements or wireless link quality.
What is the input voltage range for LD56100DPU185R and which supply rails can feed it?
The LD56100DPU185R accepts input voltages from 2.35 V minimum to 5.5 V maximum, with an absolute maximum of 7 V. This range makes it compatible with common system supply rails including 2.5 V, 3.3 V, and 5 V bus voltages, allowing it to post-regulate from a switching pre-regulator or directly from a USB 5 V source to produce a clean 1.85 V output for digital or analog loads.
In which package is LD56100DPU185R available and how does this affect PCB layout for noise-sensitive designs?
The LD56100DPU185R is housed in an 8-pin TSSOP (R-PDSO-N8) package with a compact footprint of approximately 3 mm × 4.4 mm. For noise-sensitive layouts, placing the output bypass capacitor within a few millimeters of the output pin is critical to achieve the specified ultra-low noise performance; the small TSSOP package facilitates tight capacitor placement and short trace lengths that minimize parasitic inductance.
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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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