STMicroelectronics LD3985M33R, 1 Low Dropout Voltage, Voltage Regulator 550mA, 3.3 V 5-Pin, SOT-23
- RS Stock No.:
- 6868802
- Mfr. Prt No.:
- LD3985M33R
- Brand:
- STMicroelectronics
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
EU Directives 2011/65/EU and 2015/863 restrict the use of the 10 substances below in the manufacture of specified types of electrical equipment.
Whilst this restriction does not legally apply to components, it is recognised that component “compliance” is relevant to many customers.
RS definition of RoHS Compliance:
- The product does not contain any of the restricted substances in concentrations and applications banned by the Directive,
- and for components, the product is capable of being worked on at the higher temperatures required by lead–free soldering
The restricted substances and maximum allowed concentrations in the homogenous material are, by weight:
| Substance | Concentration |
| Lead | 0.1% |
| Mercury | 0.1% |
| PBB (Polybrominated Biphenyls) | 0.1% |
| PBDE ( Polybrominated Diphenyl Ethers) | 0.1% |
| Hexavalent Chromium | 0.1% |
| Cadmium | 0.01% |
| DEHP (Bis (2-Ethylhexl) phthalate) | 0.1% |
| BBP (Benzyl butyl phthalate) | 0.1% |
| DBP (Dibutyl phthalate) | 0.1% |
| DIBP (Diisobutyl phthalate) | 0.1% |
The supplier of the item listed below has informed RS Components that the product is "RoHS Compliant".
RS Components has taken all reasonable steps to confirm this statement. Information relates only to products sold on or after the date of this certificate.
| RS stock number | 6868802 |
| Product description | STMicroelectronics LD3985M33R, 1 Low Dropout Voltage, Voltage Regulator 550mA, 3.3 V 5-Pin, SOT-23 |
| Manufacturer / Brand | STMicroelectronics |
| Manufacturer part number | LD3985M33R |
RS Components Ltd, Birchington Road, Corby, Northants, NN17 9RS, UK
Statement of Conformity
This statement confirms that the product detailed below complies with the specifications currently published in the RS media and has been subject to the strict quality conditions imposed by RS Components’ internal management systems. Furthermore and where applicable, it confirms that all relevant semiconductor devices have been handled and packed under conditions that meet the administrative and technical requirements of ANSI/ESD S20.20 and EN61340-5-1 electrostatics control standards.
| RS stock number | 6868802 |
| Product description | STMicroelectronics LD3985M33R, 1 Low Dropout Voltage, Voltage Regulator 550mA, 3.3 V 5-Pin, SOT-23 |
| Manufacturer / Brand | STMicroelectronics |
| Manufacturer part number | LD3985M33R |
The foregoing information relates to product sold on, or after, the date shown below.
RS COMPONENTS
| Date | Dec 23, 2024 |
RS Components Pte Ltd Robinson Road, P.O. Box 1582, Singapore 903132
Product Details
LDO (Low Dropout) Linear Voltage Regulators, STMicroelectronics
The Low dropout or LDO is a linear voltage regulator. We have a wide range of linear regulators. The LDO regulator can operate with a small input–output differential voltage. LDO voltage regulators may offer fast transient response, wide input voltage range, low quiescent current and low noise with high PSRR.
LDO (Low Dropout) Linear Voltage Regulators, STMicroelectronics, 150mA to 200mA
Specifications
| Attribute | Value |
| Brand | STMicroelectronics |
| Minimum Operating Temperature | -40 °C |
| Output Voltage | 3.3 V |
| Maximum Output Current | 550 mA |
| Mounting Type | Surface Mount |
| Output Type | Fixed |
| Number of Outputs | 1 |
| Height | 1.3 mm |
| Dimensions | 3 x 1.75 x 1.3 mm |
| Quiescent Current | 0.17 mA |
| Line Regulation | 0.1 %/V |
| Load Regulation | 0.005 %/mA |
| Minimum Input Voltage | 2.5 V |
| Polarity | Positive |
| Package Type | SOT-23 |
| Maximum Operating Temperature | +125 °C |
| Accuracy | ±2 % |
| Length | 3 mm |
| Maximum Input Voltage | 6 V |
| Width | 1.75 mm |
| Pin Count | 5 |
| Regulator Type | Low Dropout Voltage |