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TPS638221

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Data sheet

TPS638221

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Product details

Rating Catalog Topology Buck-Boost Vin (max) (V) 5.5 Vin (min) (V) 1.8 Vout (max) (V) 5.5 Vout (min) (V) 1.2 Switch current limit (typ) (A) 6.5 Features Dynamic voltage scaling, Enable, Light-load efficiency, Load Disconnect, Low Quiescent Current, Output discharge, Overtemperature protection, Overvoltage protection, Power good, Prebias startup, Synchronous rectification, True Shutdown, UVLO fixed Operating temperature range (°C) to Iq (typ) (A) 0.0000027 Duty cycle (max) (%) 100
Rating Catalog Topology Buck-Boost Vin (max) (V) 5.5 Vin (min) (V) 1.8 Vout (max) (V) 5.5 Vout (min) (V) 1.2 Switch current limit (typ) (A) 6.5 Features Dynamic voltage scaling, Enable, Light-load efficiency, Load Disconnect, Low Quiescent Current, Output discharge, Overtemperature protection, Overvoltage protection, Power good, Prebias startup, Synchronous rectification, True Shutdown, UVLO fixed Operating temperature range (°C) to Iq (typ) (A) 0.0000027 Duty cycle (max) (%) 100
— (—) — See data sheet
  • Input voltage range: 1.8V to 5.5V
    • 2.0V minimum input voltage for start-up
  • VOUT range: 1.2V to 5.5V
  • Output current
    • Up to 3.5A for VIN ≥ 2.5V, VOUT = 3.3V
    • Up to 4A for VIN ≥ 3V, VOUT = 3.3V
  • High efficiency over the entire load range
    • Low 2.3µA operating quiescent current
    • 91.94% efficiency at VIN = 3.6V, VOUT = 3.3V, IOUT = 100µA (in buck-boost mode)
    • 95.33% efficiency at VIN = 3.6V, VOUT = 3.3V, IOUT = 2A (in buck-boost mode)
  • Automatic power save mode, ultra-sonic mode, and forced PWM mode selectable
  • Windowed power good indicated by PG pin
  • Output discharge function (TPS638221 only)
  • Supports 1.2V logic I/O
  • Safety and robust protection features
    • Overtemperature protection
    • Input and output overvoltage protection
    • True load disconnect during shutdown
    • Forward and backward current limit
    • Hiccup protection
  • 15-ball WCSP package (2.029mm × 1.257mm)
  • Input voltage range: 1.8V to 5.5V
    • 2.0V minimum input voltage for start-up
  • VOUT range: 1.2V to 5.5V
  • Output current
    • Up to 3.5A for VIN ≥ 2.5V, VOUT = 3.3V
    • Up to 4A for VIN ≥ 3V, VOUT = 3.3V
  • High efficiency over the entire load range
    • Low 2.3µA operating quiescent current
    • 91.94% efficiency at VIN = 3.6V, VOUT = 3.3V, IOUT = 100µA (in buck-boost mode)
    • 95.33% efficiency at VIN = 3.6V, VOUT = 3.3V, IOUT = 2A (in buck-boost mode)
  • Automatic power save mode, ultra-sonic mode, and forced PWM mode selectable
  • Windowed power good indicated by PG pin
  • Output discharge function (TPS638221 only)
  • Supports 1.2V logic I/O
  • Safety and robust protection features
    • Overtemperature protection
    • Input and output overvoltage protection
    • True load disconnect during shutdown
    • Forward and backward current limit
    • Hiccup protection
  • 15-ball WCSP package (2.029mm × 1.257mm)

The TPS63822 and TPS638221 are low quiescent current, high output current buck-boost converters with a typical valley current limit of 6.5A. The 2.3µA quiescent current and four low Rdson MOSFETs enable high efficiency from a light to a heavy load range.

Depending on the input voltage, the devices automatically operate in boost, buck, or in buck-boost mode when the input voltage is approximately equal to the output voltage. The transitions between modes occur at defined thresholds and avoid unwanted toggling within the modes which reduces output voltage ripple.

The devices have a fast dynamic response, which enables the regulation of output voltage tightly, even in the event of heavy load transients.

The devices offer a small solution size in WCSP.

The TPS63822 and TPS638221 are low quiescent current, high output current buck-boost converters with a typical valley current limit of 6.5A. The 2.3µA quiescent current and four low Rdson MOSFETs enable high efficiency from a light to a heavy load range.

Depending on the input voltage, the devices automatically operate in boost, buck, or in buck-boost mode when the input voltage is approximately equal to the output voltage. The transitions between modes occur at defined thresholds and avoid unwanted toggling within the modes which reduces output voltage ripple.

The devices have a fast dynamic response, which enables the regulation of output voltage tightly, even in the event of heavy load transients.

The devices offer a small solution size in WCSP.
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* Data sheet TPS63822 and TPS638221 Low Quiescent Current, 4A Buck-Boost Converters datasheet PDF | HTML Sep 1, 2026

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