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TPS63806

TPS63806

2.5-A, High Efficiency Buck-Boost Converter with Optimized Load-Step Response

描述

The TPS63805 and TPS63806 are high efficiency, high output current buck-boost converters. It is used when the input voltage is higher, equal, or lower than the output voltage. Continuous output currents up to 2 A are supported over a wide voltage range for both devices. The devices limit the peak current during all operation modes. They automatically change from buck to boost operation based on the input voltage. They remain in a 4-cycle buck-boost mode when the input voltage is approximately equal to the output voltage. The output voltages for the devices are individually adjusted by a resistive divider. The transitions between modes happen at defined thresholds and avoids unwanted toggling within the modes.

The TPS63805 and TPS63806 come in a 1.4 mm x 2.3 mm package. The device works with tiny passive components to keep the overall solution size small.

特性

• Input voltage range: 1.3 V to 5.5 V

• Device input voltage > 1.8 V for start-up

• Output voltage range: 1.8 V to 5.2 V (adjustable)

• 2-A Output current for VI ≥ 2.3 V, VO = 3.3 V

• High efficiency over the entire load range

• 11-µA Operating quiescent current (TPS63805)

• Power save mode and mode selection for forced PWM-mode

• 180-mV load-step response at a 2 A current step (TPS63806)

• Up to 2.5 A transient output current support (TPS63806)

• Peak current buck-boost mode architecture

• Defined transition points between buck, buck-boost and boost operation modes

• Forward and reverse current operation

• Start-up into pre-biased outputs

• Safety and robust operation features

• Integrated soft start

• Overtemperature- and overvoltage-protection

• True shutdown function with load disconnect

• Forward and backward current limit

• Small solution size of 18.5 mm2 (TPS63805)

• Small 0.47 µH inductor

• Works with 22 µF minimum output capacitor