パッケージ情報
| パッケージ | ピン数 TSSOP (PW) | 16 |
| 動作温度範囲 (℃) -40 to 125 |
| パッケージ数量 | キャリア 92 | TUBE |
LM2651 の特徴
- Ultra high efficiency up to 97%
- High efficiency over a 1.5A to milliamperes load range
- 4V to 14V input voltage range
- 1.8V, 2.5V, 3.3V, or ADJ output voltage
- Internal MOSFET switch with low RDS(on) of 75m
- 300kHz fixed frequency internal oscillator
- 7µA shutdown current
- Patented current sensing for current mode control
- Input undervoltage lockout
- Adjustable soft-start
- Current limit and thermal shutdown
- 16-pin TSSOP package
LM2651 に関する概要
The LM2651 switching regulator provides high efficiency power conversion over a 100:1 load range (1.5A to 15mA). This feature makes the LM2651 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes.
Synchronous rectification is used to achieve up to 97% efficiency. At light loads, the LM2651 enters a low power hysteretic or "sleep" mode to keep the efficiency high. In many applications, the efficiency still exceeds 80% at 15mA load. A shutdown pin is available to disable the LM2651 and reduce the supply current to less than 10µA.
The LM2651 contains a patented current sensing circuitry for current mode control. This feature eliminates the external current sensing resistor required by other current-mode DC-DC converters.
The LM2651 has a 300 kHz fixed frequency internal oscillator. The high oscillator frequency allows the use of extremely small, low profile components.
A programmable soft-start feature limits current surges from the input power supply at start up and provides a simple means of sequencing multiple power supplies.
Other protection features include input undervoltage lockout, current limiting, and thermal shutdown.