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1,420 pcs
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1420 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The R1202x Series from Ricoh are CMOS-based PWM step-up DC/DC converter ICs designed for high efficiency with low supply current. These ICs integrate an NMOS FET, NPN transistor, oscillator, PWM comparator, voltage reference unit, error amplifier, current limit circuit, under-voltage lockout (UVLO), over-voltage protection (OVP), soft-start, Maxduty limit, and thermal shutdown protection.
Key electrical specifications include an input voltage range of 1.8V to 5.5V (for R1202xxxxD) or 2.3V to 5.5V (for R1202xxxxA/B), a typical supply current of 800µA, and a maximum standby current of 5µA. The devices feature a typical oscillator frequency of 1.2MHz and a maximum duty cycle of 91%. Protection features include cycle-by-cycle current limiting, over-voltage protection, and thermal shutdown.
The R1202x Series offers different versions optimized for constant-voltage power supply (R1202xxxxA/B) or constant current for driving white LEDs (R1202xxxxD). The R1202xxxxA version includes an auto-discharge function. The R1202xxxxD version supports LED dimming control via an external PWM signal with frequencies from 200Hz to 300kHz.
Available in DFN1616-6B and TSOT-23-6 packages, these converters are suitable for applications requiring efficient voltage boosting. The R1202xxxxA version discharges the VOUT to 0V at shutdown, while the R1202xxxxB version does not.
For the R1202xxxxA/B versions, the input voltage range is 2.3V to 5.5V.
The typical oscillator frequency is 1.2MHz.
The Lx current limit can be selected from 350mA or 700mA.
The over voltage protection can be selected from 14V to 23V.
The typical thermal shutdown temperature is 150°C with 50°C hysteresis.
The device is available in DFN1616-6B and TSOT-23-6 packages.
Yes, the R1202xxxxA versions include a built-in auto discharge function.