R1200x series are CMOS-based control type step-up DC/DC converter with low supply current ICs
The Ricoh R1200x series consists of CMOS-based control type step-up DC/DC converter ICs designed for low supply current applications. Each IC integrates a Nch MOSFET, NPN transistor, oscillator, PWM comparator, and various protection circuits including current limit, over-voltage protection (OVP), and under-voltage lockout (UVLO). The series offers two versions: R1200xxxxA with an auto-discharge function at standby and R1200xxxxB without it. Available in DFN1616-6, DFN(PLP)1820-6, SOT-23-6, and WLCSP-6-P1 packages.
| Supply Current | Typ. 500uA |
|---|---|
| Standby Current | Max. 3A |
| Input Voltage Range | 2.3V to 5.5V |
| Feedback Voltage | 1.0V |
| Temperature-Drift Coefficient | +150ppm/°C |
| Oscillator Frequency | Typ. 1.2MHz |
| Maximum Duty Cycle | Typ. 91% |
| Switch ON Resistance | Typ. 1.35Ω |
| UVLO Detector Threshold | Typ. 2.0V |
| Soft-start Time | Typ. 1.5ms |
| OVP Detector Threshold | 17V, 19V, 21V |
| Switching Control | PWM |
| Operating Temperature Range | -40 to 85 °C |
The OVP threshold is selectable from 17V, 19V, or 21V.
R1200xxxxA has an auto discharge function at standby, while R1200xxxxB does not.