STMicroelectronics, L4974AStep-Down Switching Regulator, 1-Channel 3.5A Adjustable 20-Pin, PDIP
- RS Stock No.:
- 0265623
- Mfr. Prt No.:
- L4974A
- 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 | 0265623 |
| Product description | STMicroelectronics, L4974AStep-Down Switching Regulator, 1-Channel 3.5A Adjustable 20-Pin, PDIP |
| Manufacturer / Brand | STMicroelectronics |
| Manufacturer part number | L4974A |
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 | 0265623 |
| Product description | STMicroelectronics, L4974AStep-Down Switching Regulator, 1-Channel 3.5A Adjustable 20-Pin, PDIP |
| Manufacturer / Brand | STMicroelectronics |
| Manufacturer part number | L4974A |
The foregoing information relates to product sold on, or after, the date shown below.
RS COMPONENTS
| Date | Nov 5, 2024 |
RS Components Pte Ltd Robinson Road, P.O. Box 1582, Singapore 903132
Product Details
Switching Voltage Regulators, STMicroelectronics
DC-DC Switching Converters, Step-Down Regulators, STMicroelectronics
ST’s monolithic switching regulators offer high input-voltage capability, and deliver output currents up to 4A, with high switching frequency.
Specifications
| Attribute | Value |
| Brand | STMicroelectronics |
| Maximum Input Voltage | 50 V |
| Width | 7.1 mm |
| Pin Count | 20 |
| Maximum Output Voltage | 40 V |
| Dimensions | 24.8 x 7.1 x 4.59 mm |
| Regulator Function | Buck Controller |
| Line Regulation | 30 mV |
| Load Regulation | 25 mV |
| Minimum Input Voltage | 15 V |
| Package Type | PDIP |
| Maximum Operating Temperature | +150 °C |
| Length | 24.8 mm |
| Minimum Operating Temperature | -40 °C |
| Maximum Output Current | 3.5 A |
| Mounting Type | Through Hole |
| Maximum Switching Frequency | 200 kHz |
| Switching Regulator | Yes |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Height | 4.59 mm |
| Efficiency | 90 % |
| Minimum Output Voltage | 5.1 V |
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