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Step-Down Switching Regulator
| Manufacturer : | Analog Devices, Inc |
|---|---|
| Package/Case : | TSSOP-16 |
| Product Categories : | Circuit board design |
| Datasheet: | LT1940EFE Datasheet (PDF) |
| RoHs Status: | Lead free / RoHS Compliant |
| Marking Code: | 1940EFE |
| In-stock: | 1127 |
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LT1940EFE Product Details
The LT1940EFE is a dual current mode PWM step-down DC/DC converter with internal 2A power switches. Both converters are synchronized to a single 1.1MHz oscillator and run with opposite phases, reducing input ripple current. The output voltages are set with external resistor dividers, and each regulator has independent shutdown and soft-start circuits. Each regulator generates a power-good signal when its output is in regulation, easing power supply sequencing and interfacing with microcontrollers and DSPs.
The LT1940’s 1.1MHz switching frequency allows the use of tiny inductors and capacitors, resulting in a very small dual 1.4A output solution. Constant frequency and ceramic capacitors combine to produce low, predictable output ripple voltage. With its wide input range of 3.6V to 25V, the LT1940EFE regulates a wide variety of power sources, from 4-cell batteries and 5V logic rails to unregulated wall transformers, lead acid batteries and distributed-power supplies. The LT1940L is intended to operate from regulated 5V supplies. A current mode PWM architecture provides fast transient response with simple compensation components and cycle-by-cycle current limiting. Frequency foldback and thermal shutdown provide additional protection.
Feature
- Wide Input Voltage Range:
- LT1940: 3.6V to 25V
- LT1940L: 3.6V to 7V
- Two 1.4A Output Switching Regulators with Internal Power Switches
- Constant 1.1MHz Switching Frequency
- Anti-Phase Switching Reduces Ripple
- Independent Shutdown/Soft-Start Pins
- Independent Power Good Indicators Ease Supply Sequencing
- Uses Small Inductors and Ceramic Capacitors
- Small 16-Lead Thermally Enhanced TSSOP Surface Mount Package
Applications
- Disk Drives
- DSP Power Supplies
- Wall Transformer Regulation
- Distributed Power Regulation
- DSL Modems
- Cable Modems
(Picture: Pinout)
(Picture: Diagram)
Technical Parameters
- Number of Outputs
- 2
- Vinmin | V
- 3.6
- Vinmax | V
- 25
- Buck Output Currenttyp | A
- 1.4, 1.4
- Comments
- Dual Output 1.4A Buck
- Monolithic
- Yes
- Synchronous
- No
LT1940EFE Datasheet
-
LT1940 Technical Documentation/Data sheet
LT1940EFE Related Products
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Shipping & Payment
Shipping
- Shipping Type
- Ship Fee
- Lead Time
- DHL
- $20.00-$40.00 (0.50 KG)
- 2-5 days
- Fedex
- $20.00-$40.00 (0.50 KG)
- 3-7 days
- UPS
- $20.00-$45.00 (0.50 KG)
- 2-5 days
- TNT
- $25.00-$65.00 (0.50 KG)
- 2-5 days
- EMS
- $25.00-$45.00 (0.50 KG)
- 5-14 days
- REGISTERED AIR MAIL
- $2.00-$3.00 (0.10 KG)
- 7-30 days
Processing Time：Shipping fee depend on different zone and country.
Payment
- Terms of payment
- Hand Fee
- Wire Transfer
- charge US$30.00 banking fee.
- Paypal
- charge 4.0% service fee.
- Credit Card
- charge 3.5% service fee.
- Western Union
- charge US$0.00 banking fee.
- Money Gram
- charge US$0.00 banking fee.
We provide high quality products, thoughtful service and after sale guarantee
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Minimum order quantity starts from 1pcs.
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90 days quality guarantee for all products.
Packing
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Step1: Products
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Step2: Vacuum Packaging
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Step3: Anti-Static Bag
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Step4: Individual Packaging
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Step5: Packaging Boxes
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Step6: Bar-Code Shipping Tag
All the products will packing in anti-staticbag. Ship with ESD antistatic protection.
Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.
We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.
After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.
Guarantees
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
FAQ:
- Q: How does Jotrin guarantee that LT1940EFE is the original manufacturer or agent of ADI?
- We have a professional business development department to strictly test and verify the qualifications of ADI original manufacturers and agents. All ADI suppliers must pass the qualification review before they can publish their LT1940EFE devices; we pay more attention to the channels and quality of LT1940EFE products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
- Q: How to find the detailed information of LT1940EFE chips? Including ADI original factory information, Circuit board design application, LT1940EFE pictures?
- You can use Jotrin's intelligent search engine, or filter by Step-Down (Buck) Regulators ; Multiple Output Buck category, or find it through Analog Devices, Inc Information page.
- Q: Are the ADI's LT1940EFE price and stock displayed on the platform accurate?
- The ADI's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for LT1940EFE, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
- Q: Can I place an order offline?
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Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online. - Q: What forms of payment can I use in Jotrin?
- TT Bank, Paypal, Credit Card, Western Union, and Escrow is all acceptable.
- Q: How is the shipping arranged and track my package?
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Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days. - Q: What is the process for returns or replacement of LT1940EFE?
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All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment.
If there is something wrong with the LT1940EFE we delivered, we will accept the replacement or return of the LT1940EFE only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of LT1940EFE.
(3)The LT1940EFE is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy. - Q: How to contact us and get support, such as LT1940EFE datasheet pdf, LT1940 pin diagram?
- Need any After-Sales service, please feel free contact us: sales@jotrin.com
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