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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1501. | R1221N40AD-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 |
| 1502. | R1221N40AE-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.0V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1503. | R1221N41AD-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 |
| 1504. | R1221N42AD-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 |
| 1505. | R1221N42AE-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.2V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1506. | R1221N43AD-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 |
| 1507. | R1221N44AD-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 |
| 1508. | R1221N44AE-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.4V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1509. | R1221N45AC-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.5V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1510. | R1221N45AE-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.5V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1511. | R1221N46AC-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.6V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1512. | R1221N46AD-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 |
| 1513. | R1221N46AE-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.6V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1514. | R1221N47AC-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.7V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1515. | R1221N47AD-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 |
| 1516. | R1221N47AE-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.7V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1517. | R1221N48AC-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.8V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1518. | R1221N48AD-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 |
| 1519. | R1221N49AC-TR | Step-down DC/DC converter with voltage detector. Output voltage (Vout) 4.9V. Detector threshold (-Vdet) 3.0V. Oscillator frequency 300kHz | RICOH | SOT-23 | 6 | -40°C | 85°C | 218K |
| 1520. | R1221N49AD-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 |
