The GYLTC3588 integrates a low-loss full-wave bridge rectifier with a high efficiency buck converter to form a complete energy harvesting solution optimized for high output impedance energy sources such as piezoelectric, solar, or magnetic transducers. An ultralow quiescent current undervoltage lockout (UVLO) mode with a wide hysteresis window allows charge to accumulate on an input capacitor until the buck converter can efficiently transfer a portion of the stored charge to the output. In regulation, the GYLTC3588 enters a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation.

Four output voltages, 1.8V, 2.5V, 3.3V and 3.6V, are pin selectable with up to 100mA of continuous output current; however, the output capacitor may be sized to service a higher output current burst. An input protective shunt set at 20V enables greater energy storage for a given amount of input capacitance.

• 950nA input quiescent current (regulated output – no load)
• 450nA input quiescent current in UVLO
• 2.7V to 20V input working range
• Integrated low-loss full-wave bridge rectifier with output current up to 100mA
• Selectable output voltage is 1.8V, 2.5V, 3.3V, 3.6V
• High efficiency integrated hysteretic step-down DC / DC
• Input protection shunt – up to 25mA pulldown when VIN ≥ 20V
• Wide input undervoltage lockout (UVLO) range