采用 SOT-23 封裝、具有 22V 內部 FET 開關的 0.6/1.6MHz 升壓轉換器
| Vin (Min) (V) | 2.7 |
| Vin (Max) (V) | 14 |
| Vout (Min) (V) | 1.23 |
| Vout (Max) (V) | 22 |
| Switch current limit (Typ) (A) | 1.5 |
| Regulated outputs (#) | 1 |
| Switching frequency (Min) (kHz) | 600 |
| Switching frequency (Max) (kHz) | 1600 |
| Iq (Typ) (mA) | 2 |
| Features | Enable |
| Duty cycle (Max) (%) | 93 |
| Rating | Catalog |
- 22-V DMOS FET Switch
- 1.6-MHz (X Option), 0.6-MHz (Y Option)
Switching Frequency - Low RDS(ON) DMOS FET
- Switch Current Up to 1.8 A
- Wide Input Voltage Range (2.7 V to 14 V)
- Low Shutdown Current (<1 μA)
- 5-Lead SOT-23 Package
- Uses Tiny Capacitors and Inductors
- Cycle-by-Cycle Current Limiting
- Internally Compensated
The LM2731 switching regulators are current-mode boost converters operating at fixed frequencies of 1.6 MHz (X option) and 600 kHz (Y option).
The use of SOT-23 package, made possible by the minimal power loss of the internal 1.8-A switch, and use of small inductors and capacitors result in the highest power density of the industry. The 22-V internal switch makes these solutions perfect for boosting to voltages up to 20 V.
These parts have a logic-level shutdown pin that can reduce quiescent current and extend battery life.
Protection is provided through cycle-by-cycle current limiting and thermal shutdown. Internal compensation simplifies design and reduces component count.
