Products > Integrated Circuits (ICs) > LM3686TLX

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Step-Down DC-DC Converter with Integrated Post Linear Regulators System & Low-Noise Linear Reg.

  • Manufacturer :
  • TI
  • Package/Case :
  • SMD
  • Product Categories :
  • Power management ; Battery management ; Battery fuel gauges
  • RoHs Status:
  • Lead free/RoHS Compliant
  • In-stock:
  • 0


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LM3686TLX Product Details

The LM3686TLX is a step-down DC-DC converter with a very low-dropout linear regulator and a low-noise linear regulator optimized for powering ultra-low voltage circuits. It provides three outputs with combined load current up to 900 mA over an input voltage range from 2.7 V to 5.5 V.

The device offers superior features and performance for many applications. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system control. During full-power operation, a fixed-frequency 3 MHz (typical), PWM mode drives loads from approximately 70 mA to 600 mA maximum. Hysteretic PFM mode extends the battery life through reduction of the quiescent current to 28 μA (typical) at light load and system standby. Internal synchronous rectification provides high efficiency.

For all available packages, see the orderable addendum at the end of the data sheet.

All trademarks are the property of their respective owners.

Three enable (EN_x) pins allow the separate operation of either the DC-DC, post-regulation linear regulator, or the linear regulator alone. If the DC-DC is not enabled during start-up of the post-regulation linear regulator, a parallel small-pass transistor supplies the linear regulator from VBATT with maximal 50 mA. In the combined operation where both enables are raised together, the small-pass transistor is deactivated and the big pass transistor provides 350 mA output current. In shutdown mode (EN_x pins pulled low), the device turns off and reduces battery consumption to 2.5 μA (typical).

The LM3686TLX is available in a 12-pin DSBGA package. A high-switching frequency of 3 MHz (typical) allows the use of a few tiny surface-mount components. Only six external surface-mount components, an inductor and five ceramic capacitors, are required to establish a 15.66 mm2 total solution size.



  • DC-DC Regulator
    • VOUT_DCDC = 1.2 V to 2.5 V
    • 600-mA Maximum ILOAD
    • 3-MHz Typical PWM Fixed Switching Frequency
    • Automatic PFM/PWM Mode Switching
    • Internal Synchronous Rectification
    • Internal Soft Start
  • Dual-Rail Linear Regulator: LILO
    • Load Transients < 50-mV Peak Typical
    • Line Transients < 1-mV Peak Typical
    • VOUT_LILO = 0.7 V to 2 V
    • 70-μA Typical IQ and 300-mA Maximum ILOAD
  • Linear Regulator: LDO
    • Load Transients < 80-mV Peak Typical
    • Line Transients < 1-mV Peak Typical
    • VOUT_LDO = 1.5 V to 3.3 V
    • 50-μA Typical IQ and 350-mA Maximum ILOAD
  • Combined Global Features
    • VBATT ≥ Maximum (VOUT_LILO + 1.5 V, 2.7 V)
    • Operates From a Single Li-Ion Cell or 3-Cell NiMH/NiCd Batteries
    • 100-μA IQ and 900-mA Maximum ILOAD

LM3686TLX Block Diagram
(Picture: Diagram)

Technical Parameters

  • Manufacturer
  • TI
  • Packing
  • Tape & Reel (TR)/Cut Tape (CT)/Tray/Tube
  • RoHs Status
  • Lead free/RoHS Compliant
  • Package/Case
  • SMD

LM3686TLX Documents

LM3686TLX Related Products

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  • **ICTO***

    Rascher ⭐️Versand, ⭐️schöne Ware. Vielen ⭐️Dank! .. ⭐️ 1A

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Estimated Delivery Time: Feb 03 - Feb 08 days (choose Expedited at checkout).

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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 LM3686TLX 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 LM3686TLX devices; we pay more attention to the channels and quality of LM3686TLX products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of LM3686TLX chips? Including TI original factory information, Power management ; Battery management ; Battery fuel gauges application, LM3686TLX pictures?
You can use Jotrin's intelligent search engine, or filter by Power management ; Battery management ; Battery fuel gauges category, or find it through TI brand manufacturer page.
Q: Are the TI's LM3686TLX 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 LM3686TLX, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Q: What is the process for returns or replacement of LM3686TLX?
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 LM3686TLX we delivered, we will accept the replacement or return of the LM3686TLX 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 LM3686TLX.
(3)The LM3686TLX 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.
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