Ricoh launches a Buck-Boost DC/DC Converter with 300 nA quiescent current for IoT devices and wearables
The RP604 is able to provide up to 300 mA in Buck mode whilst in Boost mode the output current is less and related to the input voltage level.
Multiple protection circuits are integrated, including an Under Voltage Lock-Out circuit which disables the DC/DC Converter in case the input voltage drops below a minimum threshold. A soft-start circuit controls the output voltage to ramp-up smoothly and prevents any output overshoot and undershoot during the start-up period. The Lx current limit circuit prevents the peak current through the inductor to exceed a specific maximum current threshold. An output overvoltage protection which turns off both the P-channel and N-channel MOSFETs and thermal protection, shutting down the IC in case the junction temperature increases above 140ºC.
The RP604 has an optional auto-discharge function, which rapidly discharges the output capacitor once the chip is disabled by the CE pin. As for the available packages, one can select from a small sized WLCSP-20-P2 and large sized DFN(PLP)2730-12.
Features RP604 | |
Input Voltage Range | 1.8 V to 5.5 V |
Output Voltage Range | (in 0.1 V step) 1.6 V to 5.2 V |
Output Voltage Accuracy | ±1.5% |
Output Current | (buck mode) 300 mA |
Quiescent Current | (device not switching) Typ. 300 nA |
Standby Current | 0.01 µA |
PMOS On-Resistance | (Vin = 3.6V, RP604Z) 0.12 Ω |
NMOS On-Resistance | (Vin = 3.6V, RP604Z) 0.12 Ω |
Protection Circuits | UVLO, OVP, Soft-Start, Lx Peak Current, Thermal |
Peak Efficiency | 92% |
Auto-Discharge Function | Optional |
Package RP604Z, RP604K | WLCSP-20-P2, DFN(PLP)2730-12 |
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