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LT3971IDD#TRPBF Datasheet (PDF)16-TFSOP (0.118", 3.00mm Width) Exposed Pad
10-WFDFN Exposed Pad
10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
10-WFDFN Exposed Pad
10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
16-TFSOP (0.118", 3.00mm Width) Exposed Pad
10-WFDFN Exposed Pad
10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
10-WFDFN Exposed Pad
10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
The LT3971 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 38V. Low quiescent current design consumes only 2.8μA of supply current while regulating with no load. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 15mV in a typical application. An internally compensated current mode topology is used for fast transient response and good loop stability. A high efficiency 0.33Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. An accurate 1V threshold enable pin can be used to shut down the LT3971, reducing the input supply current to 700nA. A capacitor on the SS pin provides a controlled inrush current (soft-start). A power good flag signals when VOUT reaches 91% of the programmed output voltage. The LT3971 is available in small 10-lead MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance. A 16-lead MSOP is also offered which has enhanced pin-to-pin fault tolerance.
| Vout | Iout | Vref Accuracy | |
| LT3971 | Adj | 1.2A | 2.5% |
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Purchase Guide 1. Send Enquiry You can send an inquiry by email, or add the item to the RFQ list and submit it to us. Tell us the model and quantity you need, our sales staff will reply the price in time.  sales@welllinkchips.com 2. Receive a quote You will receive an email with the price, quantity and delivery date of the product you need 3. Payment You can pay the orders by wire transfer offline. We support: Paypal,VISA. Please fill the shipping address and express information when placing your order. We support: UPS,DHL,Fedex,SF Shipping & Delivering
1. Shipping & Delivering After receiving your payment, we will ship the goods for you within the delivery period and send the shipping number by email 2. Shipping cost already shown on the quote, please check your email. 3.We will evaluate the shipping cost according to the price of the product you purchased and the shipping address. If you need to specify the shipping method, you can notify us by email. 4. We support DHL, FedEx, UPS, SF to ship your goods by default  5.Regarding in stock parts, orders can generally be ready to ship within 4 hours. We ship daily at 5pm.（UTC/GMT+8） Once the goods are shipped, estimated delivery time depends on the shipping methods you chose: FedEx International, 5-7 business days. DHL Express, 5-7 business days. The following are some common countries' logistic time.  Note: The above table is for reference only, there may will have some delay for the uncontrollable factors. Refund & Return
Refund
Refunds are normally accepted within 30 days from the date of the parcel delivered.
Please contact our support team for any issues immediately once you receive your parcels includes but is not limited to below reasons:
Not received the parcel normally
Yes, we guarantee a refund or to resend your order if you haven't received the parcel beyond the regular shipping days, except the case which customer takes the responsibility for the unsuccessful delivery such as providing an incorrect shipping address, can not complete the customs clearance due to customer's reason, etc.
Note: If the following issues occurs:
extreme weather, post office delay, customs clearance, local protest, etc. In this case, we are incapable of guaranteeing on-time delivery, but we'll try our best to support you,thanks.
Some items missing from my shipment
First, check that you've received all the boxes associated with your order. Then fully empty each box you received, sometimes small parts get caught in crevices or in packing material. If you still can't find your item, please email customer service right away. Include a description of the missing quantities and pictures of the whole parcel. We'll forward them to our warehouse to check the monitor records and the packing pictures records. Steps:
1. Send email to support team for authorization. 2. We'll check and verify the issues. 3. Offer solutions to customer case by case.
Return
By returning products to WELL LINK CHIPS, the Customer certifies that the products were purchased from WELL LINK CHIPS and there has been no substitution in whole or part of the same product from another supplier, distributor or other such sources of the product. The return should be in the original packaging and in unused condition (except defective). ESD or moisture-sensitive products should not be opened except under controlled conditions. General Rules:
Returns are normally accepted within 365 days from the date of the parcel delivered.
When a customer requests a return due to 'non-original/fake/quality problems', a valid quality report from a third-party authoritative organization recognized by our company is required for the return and exchange.
Any charges from customs and other fees should be paid by customers if the return reason is customers' reason, such as buy parts mistakenly,etc.
Return Freight charges must be prepaid; we will not accept COD shipments.
Welllink Chips’ quality control process is carried out in strict accordance with the ISO9001 international quality management system, and quality risks are controlled and reduced through strict supplier control measures + quality testing and other measures.
Supplier level control
(Qualified suppliers, provisional suppliers and blacklisted suppliers)
 Graded
management  Regular
assessment  Dynamic
management
Quality testing
(QC process according to international standards to guarantee product quality)
Testing process:
Primary testing
Labels and outer packaging
Secondary testing
Appearance and electrical properties
Tertiary testing
Slicing, open cap, solderability, ambient temperature, ageing, X-RAY, ultrasound
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