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
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
SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 SOT-23 (DBV) 6 5 mm² 1.60 x 2.90
  • 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
  • APPLICATIONS
    • USB Powered Peripherals
    • Organizers, PDAs, and Handheld PCs
    • Low Power DSP Supply
    • Digital Cameras
    • Hard Disk Drives
    • Portable Audio Players

  • 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
  • APPLICATIONS
    • USB Powered Peripherals
    • Organizers, PDAs, and Handheld PCs
    • Low Power DSP Supply
    • Digital Cameras
    • Hard Disk Drives
    • Portable Audio Players

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.

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

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Type Title Date
* Data sheet SOT23 Step-Down Controller datasheet 17 Jun 2003
Analog design journal 4Q 2010 Issue Analog Applications Journal 15 Nov 2010
Application note Using Ceramic Output Capacitors With The TPS6420x Buck Controllers (Rev. B) 11 Mar 2010
Application note 5 A Buck Converter Using the TPS6420x Family of Step Down Controllers 17 Jun 2004

Design & development

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Evaluation board

TPS64202EVM-023 — TPS64202 Evaluation Module (3.3V @ 2A)

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 (...)

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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 (...)
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Design Spreadsheet for the TPS6420x

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SOT-23 (DBV) 6 View options

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