TPS62421

ACTIVE

2.25MHz 600mA/1000mA Dual Step Down Converter In Small 3x3mm QFN Package

A newer version of this product is available

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NEW TPS62442 ACTIVE 2.75-V to 6-V, dual 2-A or 3-A and 1-A step-down converter in QFN package Smaller solution size with higher output voltage range 0.6 V to 5.5 V

Product details

Iout (max) (A) 0.6 Vin (min) (V) 2.5 Vin (max) (V) 6 Type Converter Switching frequency (min) (kHz) 2000 Switching frequency (max) (kHz) 2500 Features Adaptive/Dynamic Voltage Scaling, Enable, Forced PWM, Light load efficiency, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 1.2 Vout (max) (V) 1.8 Rating Catalog Operating temperature range (°C) -40 to 85
Iout (max) (A) 0.6 Vin (min) (V) 2.5 Vin (max) (V) 6 Type Converter Switching frequency (min) (kHz) 2000 Switching frequency (max) (kHz) 2500 Features Adaptive/Dynamic Voltage Scaling, Enable, Forced PWM, Light load efficiency, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 1.2 Vout (max) (V) 1.8 Rating Catalog Operating temperature range (°C) -40 to 85
VSON (DRC) 10 9 mm² 3 x 3
  • High Efficiency up to 95%
  • VIN Range from 2.5 V to 6 V
  • 2.25-MHz Fixed Frequency Operation
  • Output Current 600 mA and 1000 mA
  • Adjustable Output Voltage from 0.6 V to VIN
  • Pin Selectable Output Voltage Supports Simple
    Dynamic VoltageScaling
  • Optional EasyScale One-Pin Serial Interface for
    Dynamic Output Voltage Adjustment
  • Power-Save Mode at Light Load Currents
  • 180° Out of Phase Operation
  • Output Voltage Accuracy in PWM Mode ±1%
  • Typical 32-µA Quiescent Current for both
    Converters
  • 100% Duty Cycle for Lowest Dropout
  • Available in a 10-Pin VSON (3 mm × 3 mm)
  • High Efficiency up to 95%
  • VIN Range from 2.5 V to 6 V
  • 2.25-MHz Fixed Frequency Operation
  • Output Current 600 mA and 1000 mA
  • Adjustable Output Voltage from 0.6 V to VIN
  • Pin Selectable Output Voltage Supports Simple
    Dynamic VoltageScaling
  • Optional EasyScale One-Pin Serial Interface for
    Dynamic Output Voltage Adjustment
  • Power-Save Mode at Light Load Currents
  • 180° Out of Phase Operation
  • Output Voltage Accuracy in PWM Mode ±1%
  • Typical 32-µA Quiescent Current for both
    Converters
  • 100% Duty Cycle for Lowest Dropout
  • Available in a 10-Pin VSON (3 mm × 3 mm)

The TPS6242x device is a synchronous dual step-down DC–DC converter. It provides two independent output voltage rails powered by 1-cell Li-Ion or 3-cell NiMH/NiCD batteries. The device is also suitable to operate from a standard 3.3-V or 5-V voltage rail.

With an input voltage range of 2.5 V to 6 V, the TPS6242x is ideal for battery-powered portable applications like smart phones, PDAs, and other portable equipment.

With the EasyScale™ serial interface the output voltages can be modified during operation. It therefore supports dynamic voltage scaling for low power DSP and processors.

The TPS6242x operates at 2.25-MHz fixed switching frequency and enter the power-save mode operation at light load currents to maintain high efficiency over the entire load current range. For low-noise applications the devices can be forced into fixed-frequency PWM mode by pulling the MODE/DATA pin High. In the shutdown mode, the current consumption is reduced to 1.2 µA. The device allows the use of small inductors and capacitors to achieve a small solution size.

The TPS6242x operates over a free-air temperature range of –40°C to 85°C. It is available in a 10-pin leadless package (3 mm × 3 mm VSON)

The TPS6242x device is a synchronous dual step-down DC–DC converter. It provides two independent output voltage rails powered by 1-cell Li-Ion or 3-cell NiMH/NiCD batteries. The device is also suitable to operate from a standard 3.3-V or 5-V voltage rail.

With an input voltage range of 2.5 V to 6 V, the TPS6242x is ideal for battery-powered portable applications like smart phones, PDAs, and other portable equipment.

With the EasyScale™ serial interface the output voltages can be modified during operation. It therefore supports dynamic voltage scaling for low power DSP and processors.

The TPS6242x operates at 2.25-MHz fixed switching frequency and enter the power-save mode operation at light load currents to maintain high efficiency over the entire load current range. For low-noise applications the devices can be forced into fixed-frequency PWM mode by pulling the MODE/DATA pin High. In the shutdown mode, the current consumption is reduced to 1.2 µA. The device allows the use of small inductors and capacitors to achieve a small solution size.

The TPS6242x operates over a free-air temperature range of –40°C to 85°C. It is available in a 10-pin leadless package (3 mm × 3 mm VSON)

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Technical documentation

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Type Title Date
* Data sheet TPS6242x 2.25-MHz 600-mA and 1000-mA Dual Step-Down Converter in Small 3-mm × 3-mm VSON Package datasheet (Rev. D) PDF | HTML 31 Jul 2015
Application note QFN and SON PCB Attachment (Rev. C) PDF | HTML 06 Dec 2023
Analog Design Journal Methods of output-voltage adjustment for DC/DC converters 14 Jun 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11 Dec 2018
Analog Design Journal Understanding 100% mode in low-power DC/DC converters 22 Jun 2018
Application note Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) 29 Nov 2017
Analog Design Journal Achieving a clean startup by using a DC/DC converter with a precise enable-pin threshold 24 Oct 2017
Analog Design Journal Testing tips for applying external power to supply outputs without an input voltage 24 Oct 2016
Application note Basic Calculation of a Buck Converter's Power Stage (Rev. B) 17 Aug 2015
Analog Design Journal Five steps to a great PCB layout for a step-down converter 29 Jan 2015
EVM User's guide TPS624xxEVM-167 User Guide (Rev. A) 02 Nov 2013
Application note Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) 13 Jan 2012
Analog Design Journal IQ: What it is, what it isn’t, and how to use it 17 Jun 2011
More literature TPS62401_NanoEVM_ Schematic 13 Feb 2007
More literature BQ24070_NanoEVM_OV 29 Jan 2007
More literature TPS62401_NanoEVM_OV 29 Jan 2007
Application note Output Voltage Selection for the TPS62400 Family of Buck Converters 20 Sep 2006

Design & development

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

Simulation model

TPS62420 PSpice Average Model

SLIM129.ZIP (84 KB) - PSpice Model
Simulation model

TPS62420 PSpice Transient Model

SLIM130.ZIP (310 KB) - PSpice Model
Simulation model

TPS62421 PSpice Unencrypted Transient Model Package (Rev. A)

SLVMBC1A.ZIP (87 KB) - PSpice Model
Gerber file

TPS624xxVM Gerber Files

SLVC132.ZIP (101 KB)
Package Pins Download
VSON (DRC) 10 View options

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