L4938E

Voltage Regulator
6,648 Effective Inventory

L4938E

Effective Inventory6,648

Voltage Regulator

  • Manufacturer Part # : L4938E

  • Package/Case: PDIP-16

  • Brand: STMicroelectronics

  • Product Categories : Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Quality Assurance

Quality Assurance

All parts procured from our supply chain network undergo a rigorous incoming inspection process. This meticulous inspection ensures that the parts received by our customers are authentic and meet the required standards. Additionally, we maintain detailed records of these inspections to ensure transparency and traceability throughout the supply chain.

ship1 ship2 ship3 ship4 ship5 ship6

Certification

We have successfully obtained various certification standards and have established our own professional testing laboratory. This ensures that every product we supply to our customers meets the highest quality standards. We adhere to strict testing protocols to maintain the consistency and accuracy of our products. To ensure that our products are original and genuine, we also collaborate with reputable third-party testing facilities to conduct rigorous quality testing. Our commitment to quality extends to meeting industry, legal, regulatory, and ISO 9001:2015 requirements.

Shipping & Payment

Shipping & Payment

About Shipping

We generally ship orders within a few business days through reliable shipping carriers such as FedEx, SF, UPS, or DHL. We also have support for other shipping methods. If you would like to inquire about specific shipping details or costs, please don't hesitate to reach out to us.

questionContent1 questionContent2 questionContent3 questionContent4 ctc pelican express chunghwa post

About Payment

We accept various payment methods, including VISA, MasterCard, UnionPay, Western Union, PayPal, and other channels.

If you have a specific payment method in mind or would like to inquire about rates and other details, please feel free to contact us.

wire

WireTransfer

questionContent7

Paypal

cc

CreditCard

western

WesternUnion

mg

MoneyGram

Service & Packaging

Service & Packaging

About After Sales Service

All Parts Extended Quality Guarantee

Initiate the application within 90 days from the shipment date.

Confirm the return or exchange with our staff.

Maintain the goods in their original condition as received.

Lastly, please note that the eligibility for return or exchange of goods is subject to an assessment of the actual condition of the returned items. We will evaluate the received goods before finalizing the return or exchange process. If you have any inquiries or require further assistance regarding returns or exchanges, please don't hesitate to contact us at [email protected]

About packaging

Regarding packaging, our products are carefully packed in anti-static bags to provide ESD anti-static protection. The outer packaging is durable with secure closure. We support various packaging methods such as Tape and Reel, Cut Tape, Tube, or Tray.

pg

Example

Tape and Reel

Tape and Reel

Cut Tape

Cut Tape

Tube or Tray

Tube or Tray

L4938E DataSheet
no-price

Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!

Rapid Quote

Please submit RFQ for L4938E or email to us: Email: [email protected], we will contact you in 12 hours.

Details

The L4938E is a high-efficiency synchronous step-down converter designed for low power applications. It has a wide input voltage range of 2.5V to 5.5V, making it suitable for use in a variety of battery-powered devices. The device can deliver up to 500mA of output current with a high efficiency of up to 95%, making it ideal for applications where power consumption is a concern.It features a fixed switching frequency of 2MHz, which helps to minimize the size of external components and reduce electromagnetic interference. The L4938E also has a built-in soft-start function to prevent inrush currents and protect the components from damage during startup.Other features of the L4938E include overcurrent, overvoltage, and thermal protection, ensuring the safety and reliability of the device in various operating conditions. The device is housed in a compact and thermally-enhanced 8-pin DFN package, making it ideal for space-constrained applications.

Key Features

  • 3.5V to 40V input voltage range
  • 3A continuous output current
  • Adjustable output voltage
  • Low dropout voltage
  • Thermal shutdown and current limit protection
  • Adjustable soft-start function
  • High efficiency
  • Available in TO-220 and D²PAK packages

Application

  • Automotive applications
  • Industrial control and automation systems
  • Power supplies for home appliances
  • Battery chargers and adapters
  • Telecommunication equipment
  • Medical devices
  • LED lighting systems
  • Servo drives and motor controls
  • Solar inverters
  • Consumer electronics

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Rohs Code Yes Part Life Cycle Code Obsolete
Part Package Code DIP Pin Count ! 16
Reach Compliance Code ECCN Code EAR99
HTS Code ! 8542.39.00.01 Adjustability FIXED/ADJUSTABLE
Dropout Voltage1-Max 0.4 V Dropout Voltage1-Nom 0.6 V
Dropout Voltage2-Max 0.6 V Input Voltage Absolute-Max 28 V
JESD-30 Code R-PDIP-T16 JESD-609 Code e0
Line Regulation-Max 0.02% Load Regulation-Max 0.05%
Number of Functions 1 Number of Outputs 2
Number of Terminals 16 Operating Temperature TJ-Max 150 °C
Operating Temperature TJ-Min -40 °C Output Current1-Max 0.1 A
Output Current2-Max 0.4 A Output Voltage1-Max 5.1 V
Output Voltage1-Min 4.9 V Output Voltage1-Nom 5 V
Output Voltage2-Max 27 V Output Voltage2-Min 5 V
Package Body Material PLASTIC/EPOXY Package Code DIP
Package Equivalence Code DIP16,.3 Package Shape RECTANGULAR
Package Style IN-LINE Qualification Status ! Not Qualified
Regulator Type FIXED/ADJUSTABLE POSITIVE MULTIPLE OUTPUT LDO REGULATOR Seated Height-Max 5.1 mm
Surface Mount ! NO Technology BIPOLAR
Terminal Finish TIN LEAD Terminal Form ! THROUGH-HOLE
Terminal Pitch ! 2.54 mm Terminal Position DUAL
Voltage Tolerance-Max 4% Width 7.62 mm

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification L4938E PDF Download

FAQs

What is L4938E?

The L4938E is a voltage regulator IC (integrated circuit) designed by STMicroelectronics. It is commonly used for providing stable and regulated voltage outputs in a variety of electronic circuits and applications.

How Does L4938E Work?

The L4938E works by taking an unregulated input voltage and regulating it to a stable output voltage. It includes internal circuitry to monitor the output voltage and adjust the regulation to maintain a constant voltage level, even with fluctuations in the input voltage or load current.

How Many Pins does L4938E have and What are the Functions of the Pinout Configuration?

The L4938E is typically available in a multiwatt package with 15 pins. The pinout configuration includes:

  • Vin: Input voltage pin.
  • Vout: Output voltage pin.
  • GND: Ground pin.
  • ADJ: Adjust pin for setting the output voltage.
  • Enable: Enable pin for turning the regulator on or off.
  • Other pins for various internal functions and connections.

What are the Pros and Cons of L4938E?

Pros:

  • Regulated Output: Provides stable and regulated output voltage.
  • Internal Protection: Includes built-in protection features such as overcurrent and thermal shutdown.
  • High Efficiency: Offers high efficiency in converting input voltage to output voltage.
  • Wide Voltage Range: Supports a wide input voltage range for versatility.
  • Easy to Use: Simple to integrate and operate in electronic circuits.

Cons:

  • Heat Dissipation: May require additional heat sinking for high power applications.
  • Complexity: Some users may find the internal workings of the regulator complex.
  • Cost: Higher cost compared to basic linear regulators.
  • Package Size: The multiwatt package may be larger than other compact packages.

Are There Any Equivalents/Alternatives to L4938E for Recommendation?

  • The LM7805 from Texas Instruments is a popular alternative linear voltage regulator.
  • Alternatives to the L4938E include the LM317 and LM337 for adjustable voltage regulation.

Recommend Parts

  • L4940V12

    L4940V12

    2V fixed positive LDO regulator, 0.9V dropout, PSFM3, lead free, TO-220, 3 pin

    Brand: Stmicroelectronics Package/Case: TO-220-3

    5,455 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4960H

    L4960H

    L4960H is a high-quality switching voltage regulator capable of handling input voltages ranging from 5.1V to 40V

    Brand: Stmicroelectronics Package/Case: HEPTAWATT-7

    4,708 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4931CZ33-AP

    L4931CZ33-AP

    LDO Voltage Regulators 3.3V 0.25A Positive

    Brand: Stmicroelectronics Package/Case: TO-92

    4,108 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4931CDT33-TR

    L4931CDT33-TR

    Very low dropout voltage regulators with disable feature

    Brand: STMicroelectronics Package/Case: DPAK

    3,680 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4940V85

    L4940V85 $0.552

    Positive LDO Regulator 8.5V 1.5A

    Brand: Stmicroelectronics Package/Case: TO220-3

    3,891 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • TL431AIZT

    TL431AIZT $0.099

    Voltage Reference with 100mA Output

    Brand: Stmicroelectronics Package/Case: TO-92

    7,530 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4973V3.3

    L4973V3.3 $5.707

    Conv DC-DC 8V to 55V Step Down Single-Out 0.5V to 50V 3.5A 18-Pin PDIP Tube

    Brand: STMicroelectronics Package/Case: 18-DIP(0.300",7.62mm)

    5,381 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4805CV

    L4805CV

    Fixed Positive Voltage

    Brand: Stmicroelectronics Nv Package/Case: TO-220

    6,632 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4938NPD

    L4938NPD

    Fixed Regulator

    Brand: STMicroelectronics Package/Case: SOP-20

    4,015 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4885CV

    L4885CV

    Very low dropout voltage regulator with fixed positive output

    Brand: STMicroelectronics Package/Case: TO-220

    7,007 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4952D

    L4952D

    Linear Voltage Regulators

    Brand: STMicroelectronics Package/Case: SOP-20

    5,985 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4976

    L4976

    Step-down switching regulator with 1 A output

    Brand: Stmicroelectronics Package/Case: PDIP-8

    8,456 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4984DTR

    L4984DTR $0.456

    Power Factor Correction Controller 0.065mA 10-Pin SSOP T/R

    Brand: STMicroelectronics Package/Case: SSOP

    5,543 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4931CZ50-AP

    L4931CZ50-AP

    IC Linear Voltage Regulator with TO-92-3 Package, 1 Output rated at 250mA

    Brand: STMicroelectronics Package/Case: TO-226-3,TO-92-3(TO-226AA)FormedLeads

    8,285 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4931CD33-TR

    L4931CD33-TR

    Ideal for various electronic applications

    Brand: Stmicroelectronics Package/Case: SOIC-8

    5,233 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1

  • L4931ABD50-TR

    L4931ABD50-TR $0.564

    Positive 5.0V LDO Voltage Regulators with 0.25A

    Brand: Stmicroelectronics Package/Case: SOIC-8

    9,909 In Stock

    Cargo cycle: 3~7 Days

    The minimum order is 1