- Ultra-high efficiency up to 97%
- A high efficiency load range of 1.5A to mA
- 4V to 14V input voltage range
- 1.8V, 2.5V and 3.3V or output voltage ADJ
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Internal MOSFET switches withlowRDS(ON) is75 million
- 300kHz fixed frequency oscillator
- 7μA shutdown current
- Patented current-sensing current-mode control
- Input undervoltage lockout
- Adjustable soft-start
- Current limit and thermal shutdown
- 16-pin TSSOP package
illustrate
The LM2651 switching regulator provides high efficiency over 100:1 load range (1.5A to 15mA) power conversion. This feature makes the LM2651 ideal for long battery life in battery-powered applications where long battery life is required, both in operation and standby mode.
Efficiency up to 97% for synchronous rectification. At light loads, the LM2651 enters a low-power hysteresis or "sleep" mode to maintain high efficiency. In many applications, efficiencies are still over 80% at 15mA loads. A shutdown pin can be used to disable the LM2651 and reduce supply current by less than 10μA.
Contains patented LM2651 current-mode control current sense circuit. This feature eliminates the need for external current sense resistors for other current mode DC-DC converters.
The LM2651 has an internal oscillator at a fixed frequency of 300 kHz. The high vibration frequency allows the use of very small, low-profile components.
The programmable soft-start feature limits inrush current from the input supply at start-up and provides an easy way to sequence multiple supplies.
Other protection features include current-limit input, undervoltage lockout, and thermal shutdown.
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- Personal (PDA) digital assistant
- Computer peripherals
- Battery-powered devices
- Handheld scanners
- 5V has high conversion efficiency
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