TPS6101x High-Efficiency, 1-Cell and 2-Cell Boost Converters

1 Features

• Integrated Synchronous Rectifier for Highest Power Conversion Efficiency (> 95%)
• Start-Up Into Full Load With Supply Voltages as Low as 0.9 V, Operating Down to 0.8 V
• 200-mA Output Current From 0.9-V Supply
• Powersave-Mode for Improved Efficiency at Low Output Currents
• Autodischarge Allows to Discharge Output Capacitor During Shutdown
• Device Quiescent Current Less Than 50 μA
• Ease-of-Use Through Isolation of Load From Battery During Shutdown of Converter
• Integrated Antiringing Switch Across Inductor
• Integrated Low Battery Comparator
• Micro-Small 10-Pin MSOP or 3 mm x 3 mm QFN Package
• EVM Available (TPS6101xEVM-157)

2 Applications

• All Single- or Dual-Cell Battery Operated Products
  • Internet Audio Players
  • Pager
  • Portable Medical Diagnostic Equipment
  • Remote Control
  • Wireless Headsets

Simplified Application Circuit

3 Description

The TPS6101x devices are boost converters intended for systems that are typically operated from a single- or dual-cell nickel-cadmium (NiCd), nickel-metal hydride (NiMH), or alkaline battery.

The converter output voltage can be adjusted from 1.5 V to a maximum of 3.3 V, by an external resistor divider or, is fixed internally on the chip. The devices provide an output current of 200 mA with a supply voltage of only 0.9 V. The converter starts up into a full load with a supply voltage of only 0.9 V and stays in operation with supply voltages down to 0.8 V.

The converter is based on a fixed frequency, current mode, pulse-width-modulation (PWM) controller that goes automatically into power save mode at light load. It uses a built-in synchronous rectifier, so, no external Schottky diode is required and the system efficiency is improved. The current through the switch is limited to a maximum value of 1300 mA. The converter can be disabled to minimize battery drain. During shutdown, the load is completely isolated from the battery.

An autodischarge function allows discharging the output capacitor during shutdown mode. This is especially useful when a microcontroller or memory is supplied, where residual voltage across the output capacitor can cause malfunction of the applications. When programming the ADEN-pin, the autodischarge function can be disabled. A low-EMI mode is implemented to reduce interference and radiated electromagnetic energy when the converter enters the discontinuous conduction mode. The device is packaged in the micro-small space saving 10-pin MSOP package. The TPS61010 is also available in a 3 mm x 3 mm 10-pin QFN package.

1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Revision History

Changes from E Revision (December 2014) to F Revision

• Moved Storage temperature range, T_stg to the Absolute Maximum RatingsGo
• Changed Handling Ratings To ESD RatingsGo
• Changed R_θJA = 294°C/W" To: R_θJA = 161.8°C/W in Thermal ConsiderationsGo
• Changed text "maximum power dissipation is about 130 mW." To: "maximum power dissipation is about 247 mW." in Thermal ConsiderationsGo
• Changed Equation 8 From: = 136 mW To: = 247 mW Go

Changes from D Revision (June 2005) to E Revision

• Added Pin Configuration and Functions section, Handling Rating 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

5 Device Comparison Table

6 Pin Configuration and Functions

DGS PACKAGE

10 PINS

(TOP VIEW)

DRC PACKAGE

10 PINS

(TOP VIEW)