TPS631000DRLR

The TPS631000 is a constant frequency peak current
mode control buck-boost converter. The device has
a 3-A peak current limit (typical) and 1.6-V to 5.5-
V input voltage range. The TPS631000 provides a
power supply solution for system pre-regulators and
voltage stabilizers.
Depending on the input voltage, the TPS631000
automatically operates in boost, buck, or in 3-
cycle buck-boost mode when the input voltage is
approximately equal to the output voltage. The
transitions between modes happen at a defined
duty cycle and avoid unwanted toggling within the
modes to reduce output voltage ripple. 8-μA quiescent
current and power save mode power enable the
highest efficiency for light to no-load conditions.
The TPS631000 offers a very small solution size
with a 1.2-mm × 2.1-mm SOT-583 package, a 1-μH
inductor, and one 0805 output capacitor.

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    SPECIFICATION

    • 1.6-V to 5.5-V input voltage range
    – Device input voltage > 1.65 V for start-up
    • 1.2-V to 5.3-V output voltage range (adjustable)
    • High output current capability, 3-A peak switch
    current
    – 2-A output current for VIN ≥ 3 V, VOUT = 3.3 V
    – 1.5-A output current for VIN ≥ 2.7 V, VOUT = 3.3
    V
    • High efficiency over the entire load range
    – 8-μA typical quiescent current
    – Power save mode
    • 150-mV load-step response at a 1-A current step
    • Peak current buck-boost mode architecture
    – Seamless mode transition with < 20-mV output
    ripple
    – Forward and reverse current operation
    – Start-up into pre-biased outputs
    – Fixed-frequency operation with 2-MHz
    switching
    • Safety and robust operation features
    – Overcurrent protection and short-circuit
    protection
    – Integrated soft start with active ramp adoption
    – Overtemperature protection and overvoltage
    protection
    – True shutdown function with load disconnect
    – Forward and backward current limit
    • Small solution size
    – Small 1-µH inductor
    – Works with one 0805 output capacitor over the
    full VOUT range
    • Create a custom design using the TPS631000 with
    the WEBENCH® Power Designer