Power Management TPS62231 3 MHz Ultra Small Step Down Converter in 1x1.5 SON Package

Features

• 3 MHz switch frequency
• Up to 94% efficiency
• Output Peak Current up to 500mA
• Excellent AC and Transient Load Regulation
• High PSRR (up to 90dB)
• Small External Output Filter Components 1.0µH/ 4.7µF
• V_IN range from 2.05V to 6V
• Optimized Power Save Mode For Low Output Ripple Voltage
• Forced PWM Mode Operation
• Typ. 22 µA Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• Small 1 × 1.5 × 0.6mm³ SON Package
• 12 mm² Minimum Solution Size
• Supports 0.6 mm Maximum Solution Height
• Soft Start with typ. 100µs Start Up Time
• APPLICATIONS
  • LDO Replacement
  • Portable Audio, Portable Media
  • Cell Phones
  • Low Power Wireless
  • Low Power DSP Core Supply
  • Digital Cameras

Description

The TPS6223X device family is a high frequency synchronous step down DC-DC converter optimized for battery powered portable applications. It supports up to 500mA output current and allows the use of tiny and low cost chip inductors and capacitors.

With a wide input voltage range of 2.05V to 6V the device supports applications powered by Li-Ion batteries with extended voltage range. The minimum input voltage of 2.05V allows as well the operation from Li-primary or two alkaline batteries. Different fixed output voltage versions are available from 1.2V to 2.5V.

The TPS6223X series features switch frequency up to 3.8MHz. At medium to heavy loads, the converter operates in PWM mode and automatically enters Power Save Mode operation at light load currents to maintain high efficiency over the entire load current range.

Because of its excellent PSRR and AC load regulation performance, the device is also suitable to replace linear regulators to obtain better power conversion efficiency.

The Power Save Mode in TPS6223X reduces the quiescent current consumption down to 22µA during light load operation. It is optimized to achieve very low output voltage ripple even with small external component and features excellent ac load regulation.

For very noise sensitive applications, the device can be forced to PWM Mode operation over the entire load range by pulling the MODE pin high. In the shutdown mode, the current consumption is reduced to less than 1µA. The TPS6223X is available in a 1 × 1.5mm² 6 pin SON package.

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