Product details


Vin (Min) (V) 1.8 Vin (Max) (V) 6.5 Vout (Min) (V) 1.2 Vout (Max) (V) 6.5 Iout (Max) (A) 3 Iq (Typ) (uA) 20 Switching frequency (Min) (kHz) 350 Switching frequency (Max) (kHz) 350 Features Enable Operating temperature range (C) -40 to 85 Regulated outputs (#) 1 Number of Phases 1 Rating Catalog open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 SOT-23 (DBV) 6 5 mm² 1.60 x 2.90 open-in-new Find other Buck controllers (external switch)


  • Step-Down Controller for Applications With up to 95% Efficiency
  • 1.8-V to 6.5-V Operating Input Voltage Range
  • Adjustable Output Voltage Range From 1.2 V to VI
  • High Efficiency Over a Wide Load Current Range
  • 100% Maximum Duty Cycle for Lowest Dropout
  • Internal Softstart
  • 20-µA Quiescent Current (Typical)
  • Overcurrent Protected
  • Available in a SOT23 Package
    • USB Powered Peripherals
    • Organizers, PDAs, and Handheld PCs
    • Low Power DSP Supply
    • Digital Cameras
    • Hard Disk Drives
    • Portable Audio Players

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The TPS6420x are nonsynchronous step-down controllers that are ideally suited for systems powered from a 5-V or 3.3-V bus or for applications powered from a 1-cell Li-Ion battery or from a 2- to 4-cell NiCd, NiMH, or alkaline battery. These step-down controllers drive an external P-channel MOSFET allowing design flexibility. To achieve highest efficiency over a wide load current range, this controller uses a minimum on time, minimum off time control scheme and consumes only 20-µA quiescent current. The minimum on time of typically 600 ns (TPS64203) allows the use of small inductors and capacitors. When disabled, the current consumption is reduced to less than 1 µA. The TPS6420x is available in the 6-pin SOT23 (DBV) package and operates over a free air temperature range of –40°C to 85°C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 4
Type Title Date
* Datasheet SOT23 Step-Down Controller datasheet Jun. 17, 2003
Application note 4Q 2010 Issue Analog Applications Journal Nov. 15, 2010
Application note Using Ceramic Output Capacitors With The TPS6420x Buck Controllers (Rev. B) Mar. 11, 2010
Application note 5 A Buck Converter Using the TPS6420x Family of Step Down Controllers Jun. 17, 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The TPS64202EVM-023 is an evaluation tool for the TPS64202 inductive step-down controller in SOT-23 package which can supply voltages down to 1.2V from a 1.8-V to 6.5-V input. The TPS64202EVM-023 uses a TPS64202 adjustable output step-down controller and the appropriate external components to (...)


The development tool includes:

  • A tested TPS64202EVM-023 evaluation module with TPS64202DBV IC
  • A user's guide (SLVU093) that contains:
    • Schematic
    • Bill of materials
    • Component placement
    • Layout and setup of the EVM
  • A datasheet of the TPS6420x family of devices (SLVS485)

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SLVC038.ZIP (6 KB)

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 6 View options

Ordering & quality

Information included:
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  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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