Products > Integrated Circuits (ICs) > Power Management ICs > LM43603PWPR

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Conv DC-DC 3.5V to 36V Synchronous Step Down Single-Out 1V to 28V 3A 16-Pin HTSSOP EP T/R

  • Manufacturer :
  • TI
  • Package/Case :
  • HTSSOP16
  • Product Categories :
  • Step-Down (Buck) , Buck Converter (Integrated Switch)
  • RoHs Status:
  • Lead free / RoHS Compliant
  • In-stock:
  • 0


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LM43603PWPR Product Details

3.5V to 36V, 3A Synchronous Step-Down Voltage Converter 16-HTSSOP -40 to 125
Conv DC-DC 3.5V to 36V Synchronous Step Down Single-Out 1V to 28V 3A 16-Pin HTSSOP EP T/R



  • 27-μA Quiescent Current in Regulation
  • High Efficiency at LightLoad (DCM and PFM)
  • Meets EN55022/CISPR 22 EMI standards
  • Integrated SynchronousRectification
  • Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHzdefault)
  • Frequency Synchronization to ExternalClock
  • Internal Compensation
  • Stable with Almost AnyCombination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
  • Power-GoodFlag
  • Soft Start into a Pre-Biased Load
  • Internal Soft-Start:4.1 ms
  • Extendable Soft-Start Time by External Capacitor
  • Output Voltage TrackingCapability
  • Precision Enable to a Program System UVLO
  • OutputShort Circuit Protection with Hiccup Mode
  • Overtemperature Thermal ShutdownProtection
  • Create a Custom Design Using the LM43603 with theWEBENCH?Power Designer

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The LM43603 regulator is an easy-to-use synchronous step-down DC-DC converter capable ofdriving up to 3 A of load current from an input voltage ranging from 3.5 V to 36 V (42 V abs max).The LM43603 provides exceptional efficiency, output accuracy and dropout voltage in a very smallsolution size. An extended family is available in 0.5-A, 1-A, and 2-A load current options in pinto pin compatible packages. Peak current mode control is employed to achieve simple control loopcompensation and cycle-by-cycle current limiting. Optional features such as programmable switchingfrequency, synchronization, power-good flag, precision enable, internal soft-start, extendablesoft-start, and tracking provide a flexible and easy to use platform for a wide range ofapplications. Discontinuous conduction and automatic frequency modulation at light loads improvelight load efficiency. The family requires few external components and pin arrangement allowssimple, optimum PCB layout. Protection features include thermal shutdown,VCC undervoltage lockout, cycle-by-cycle current limit, and output shortcircuit protection. The LM43603 device is available in the HTSSOP / PWP 16 leaded package (5.1 mm ×6.6 mm × 1.2 mm) and VSON-16 package with wettable flanks. HTSSOP package is pin-to-pin compatiblewith LM43600, LM43601, LM43602, LM46000, LM46001, LM46002. VSON-16 package is only pin-to-pincompatible with LM43602.

LM43603PWPR Block Diagram
(Picture: Diagram)

Technical Parameters

  • Switching Frequency(Min)(kHz)
  • 200
  • Control Mode
  • Current Mode
  • Rating
  • Catalog
  • Vout(Max)(V)
  • 28
  • Operating Temperature Range(C)
  • -40 to 125
  • Vin(Max)(V)
  • 36
  • Type
  • Converter
  • Regulated Outputs(#)
  • 1
  • Iq(Typ)(mA)
  • 0.027
  • Package Group
  • Vout(Min)(V)
  • 1
  • Features
  • Enable,Frequency Synchronization,Light Load Efficiency,Power Good,Synchronous Rectification,Tracking
  • Duty Cycle(Max)(%)
  • 99
  • Vin(Min)(V)
  • 3.5
  • Approx. Price (US$)
  • 1.85 | 1ku
  • Iout(Max)(A)
  • 3
  • Switching Frequency(Max)(kHz)
  • 2200

LM43603PWPR Datasheet

LM43603PWPR Related Products

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Estimated Delivery Time: Dec 07 - Dec 12 days (choose Expedited at checkout).

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  • Lead Time
  • $20.00-$40.00 (0.50 KG)
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  • $25.00-$65.00 (0.50 KG)
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  • 5-14 days
  • $2.00-$3.00 (0.10 KG)
  • 7-30 days

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  • Hand Fee
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  • charge US$30.00 banking fee.
  • charge 4.0% service fee.
  • charge 3.5% service fee.
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  • charge US$0.00 banking fee.

We provide high quality products, thoughtful service and after sale guarantee

  • We have rich products, can meet your various needs.

    We have rich products, can meet your various needs.

  • Minimum order quantity starts from 1pcs.

    Minimum order quantity starts from 1pcs.

  • Lowest international shipping fee starts from US$2.00.

    Lowest international shipping fee starts from US$2.00.

  • 90 days quality guarantee for all products.

    90 days quality guarantee for all products.


  • Step1:Product

    Step1: Products

  • Step2:Vacuum packaging

    Step2: Vacuum Packaging

  • Step3:Anti-static bag

    Step3: Anti-Static Bag

  • Step4:Individual packaging

    Step4: Individual Packaging

  • Step5:Packaging boxes

    Step5: Packaging Boxes

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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.

Jotrin ESD packing


1.We provide 90 days warranty.

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.


Q: How does Jotrin guarantee that LM43603PWPR is the original manufacturer or agent of TI?
We have a professional business development department to strictly test and verify the qualifications of TI original manufacturers and agents. All TI suppliers must pass the qualification review before they can publish their LM43603PWPR devices; we pay more attention to the channels and quality of LM43603PWPR products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of LM43603PWPR chips? Including TI original factory information, Step-Down (Buck) , Buck Converter (Integrated Switch) application, LM43603PWPR pictures?
You can use Jotrin's intelligent search engine, or filter by Semiconductors ; Power management ; DC/DC switching regulators category, or find it through TI brand manufacturer page.
Q: Are the TI's LM43603PWPR price and stock displayed on the platform accurate?
The TI's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for LM43603PWPR, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
Q: Can I place an order offline?
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?
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Q: How is the shipping arranged and track my package?
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 LM43603PWPR?
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 LM43603PWPR we delivered, we will accept the replacement or return of the LM43603PWPR 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 LM43603PWPR.
(3)The LM43603PWPR 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 LM43603PWPR datasheet pdf, LM43603 pin diagram?
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