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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 641. | R1221N15XA-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 1.5V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 642. | R1221N17XA-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 1.7V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 643. | R1221N18XA-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 1.8V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 644. | R1221N19XA-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 1.9V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 645. | R1221N20XA-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 2.0V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 646. | R1221N37AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 3.7V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 647. | R1221N38AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 3.8V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 648. | R1221N39AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 3.9V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 649. | R1221N40AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.0V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 650. | R1221N41AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.1V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 651. | R1221N42AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.2V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 652. | R1221N42AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.2V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 653. | R1221N43AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.3V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 654. | R1221N44AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.4V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 655. | R1221N45AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.5V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 656. | R1221N46AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.6V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 657. | R1221N47AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.7V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 658. | R1221N48AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.8V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 659. | R1221N49AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.9V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 660. | R1221N50AH-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 5.0V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 500kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
