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  • TPS62410 2.25-MHz 2 x 800-mA Dual Step-Down Converter in Small 3 × 3 mm VSON Package

    • SLVS737A February   2007  – July 2015 TPS62410

      PRODUCTION DATA.  

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  • TPS62410 2.25-MHz 2 x 800-mA Dual Step-Down Converter in Small 3 × 3 mm VSON Package
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Dissipation Ratings
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Operation
        1. 7.1.1.1 Converter 1
        2. 7.1.1.2 Converter 2
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Dynamic Voltage Positioning
      2. 7.3.2 Undervoltage Lockout
      3. 7.3.3 Mode Selection
      4. 7.3.4 Enable
      5. 7.3.5 DEF_1 Pin Function
      6. 7.3.6 180° Out of Phase Operation
      7. 7.3.7 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Soft Start
      2. 7.4.2 100% Duty Cycle Low Dropout Operation
      3. 7.4.3 Power-Save Mode
      4. 7.4.4 Short Circuit Protection
    5. 7.5 Programming
      1. 7.5.1 EasyScale™ Interface: One-Pin Serial Interface for Dynamic Output Voltage Adjustment
        1. 7.5.1.1 General
        2. 7.5.1.2 Protocol
        3. 7.5.1.3 Bit Decoding
        4. 7.5.1.4 Acknowledge
        5. 7.5.1.5 MODE Selection
    6. 7.6 Register Maps
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Output Voltage Setting
        1. 8.1.1.1 Converter 1 Adjustable Default Output Voltage Setting
        2. 8.1.1.2 Converter 2
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Output Filter Design (Inductor and Output Capacitor)
          1. 8.2.2.1.1 Inductor Selection
          2. 8.2.2.1.2 Output Capacitor Selection
          3. 8.2.2.1.3 Input Capacitor Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • DRC|10
    • MPDS117L
Thermal pad, mechanical data (Package|Pins)
  • DRC|10
    • QFND013N
Orderable Information
  • slvs737a_oa
  • slvs737a_pm
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DATA SHEET

TPS62410 2.25-MHz 2 x 800-mA Dual Step-Down Converter in Small 3 × 3 mm VSON Package

1 Features

  • High Efficiency up to 95%
  • VIN Range from 2.5 V to 6 V
  • 2.25-MHz Fixed Frequency Operation
  • Output Current 2 x 800 mA
  • Adjustable Output Voltage from 0.6 V to VIN
  • 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)

2 Applications

  • Cell Phones, Smartphones
  • PDAs, Pocket PCs
  • OMAP™ and Low-Power DSP Supply
  • Portable Media Players
  • Digital Radios
  • Digital Cameras

3 Description

The TPS62410 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 TPS62410 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 TPS62410 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 TPS62410 operates over a free-air temperature range of –40°C to 85°C. It is available in a 10-pin leadless package (3 × 3 mm VSON)

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS62410 VSON (10) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Schematic

TPS62410 sch_lvs737.gif

Efficiency vs Output Current

TPS62410 eff_vo_33_lvs737.gif

4 Revision History

Changes from * Revision (February 2007) to A Revision

  • Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go
  • Deleted Ordering Information table Go

5 Pin Configuration and Functions

DRC Package
10-Pin VSON
Top View
TPS62410 po_lvs676.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
ADJ2 1 I Input to adjust output voltage of converter 2. In adjustable version (TPS62410) connect an external resistor divider between VOUT2, this pin and GND to set output voltage between 0.6 V and VIN. If EasyScale™ interface is used for converter 2, this pin must be directly connected to the output.
MODE/DATA 2 I This Pin has 2 functions:
  1. Operation mode selection: With low level, power-save mode is enabled where the device operates in PFM mode at light loads and enters automatically PWM mode at heavy loads. Pulling this PIN to High forces the device to operate in PWM mode over the whole load range.
  2. EasyScale™ interface function: One wire serial interface to change the output voltage of both converters. The pin has an open-drain output to provide an acknowledge condition if requested. The current into the open-drain output stage may not exceed 500 μA. The interface is active if either EN1 or EN2 is High.
VIN 3 I Supply voltage, connect to VBAT, 2.5 V to 6 V
FB1 4 I Direct feedback voltage sense input of converter 1, connect directly to VOUT1. An internal feed forward capacitor is connected between this pin and the error amplifier. In case of fixed output voltage versions or when the Interface is used, this pin is connected to an internal resistor divider network.
DEF_1 5 I/O This pin defines the output voltage of converter 1. The pin acts in TPS62410 as an analog input for output voltage setting through external resistors. In fixed default output voltage versions this pin is a digital input to select between two fixed default output voltages.
In TPS62410 an external resistor network needs to be connected to this pin to adjust the default output voltage.
SW1 6 — Switch pin of converter1. Connected to inductor 1
EN1 7 I Enable input for converter1, active high
GND 8 I GND for both converters, this pin should be connected with the PowerPAD
EN2 9 I/O Enable input for converter 2, active high
SW2 10 — Switch pin of converter 2. Connected to inductor 2
PowerPAD™ — — Connect to GND

 
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