Ricoh voltage regulator has dual-voltage level output

Ricoh has launched a voltage regulator, the RP155Z, with a special pin-selectable dual-voltage level output set within a range of 1.6V and 3.6V.

Ricoh voltage regulator has dual-voltage level output

The capability to shift voltage levels between one of the two preset output voltage levels makes it ideal for battery-powered applications with SD memory and SIM cards as well as devices requiring a Normal Operating and Power Saving Mode.

The RP155Z has a high ripple rejection, fast transient response and low supply current required by devices such as smartphones, printers and cameras. An auto-discharge function discharges the output capacitor once the LDO is disabled. The RP155Z comes with a static output voltage accuracy of ±1.0% and has a temperature drift coefficient of ±30 ppm/°C.

A number of protection circuits are included: a short-current limiting, thermal shutdown and inrush current limiting circuit. Short-current protection (fold-back type) decreases the output current in case of a short circuit to approximately 50mA, protecting the LDO and other electronic parts of the application from damage.

Thermal shutdown circuit prevents the LDO from exceeding a specific operating temperature. Inrush current limiting circuit makes sure the output voltage increases gradually and prevents high inrush current peaks and overshoots of the output voltage.

To ensure stable operation a small ceramic capacitor with low ESR and a minimum value of 1.0µF can be used.

The voltage regulator is available in a 5-pin WLCSP-5-P1 package for applications that require a small footprint solution when board space is limited.

RP155Z features:

  • Input Voltage: 1.9V to 5.25V
  • Supply Current: Typ. 80µA
  • Standby Current: Typ. 0.1µA
  • Dropout Voltage: Typ. 0.085V at 200mA
  • Ripple Rejection: Typ. 75dB, f = 1kHz, Typ. 70dB, f = 10kHz
  • Output Voltage Range: 1.6V to 3.6V
  • Output Voltage Accuracy: ±1.0%
  • Output Voltage Temperature Coefficient: Typ. ±30 ppm/°C
  • Line Regulation: Typ. 0.02%/V
  • Short-current Limiting: Typ. 50mA
  • Overcurrent Protection: Fold Back Type
  • Thermal Shutdown: Typ. 165°C
  • Inrush Current Limiting: Typ. 160mA during 180µs after start-up
  • Ceramic Capacitor Compatible: 1.0µF or more
  • Package: WLCSP-5-P1 (1.346 x 0.98 x 0.625mm)

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