Ricoh Europe (Netherlands) B.V. Semiconductor Support Centre has launched a new voltage regulator, the RP155Z, with a special pin-selectable dual-voltage level output set within a range of 1.6V and 3.6V.
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 RP155Z is available in a 5-pin WLCSP-5-P1 package for applications that require a small footprint solution when board space is limited.
RP155 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) |
| Datasheet: www.e-devices.ricoh.co.jp/en/products/power/vr_ldo/rp155/ | |
