National Semiconductor Corporation (National Semiconductor) announced a fixed-frequency switched capacitor charge pump that delivers regulated 4.5-V and 5.0-V outputs. The LM2751 provides up to 150mA of output current over an input voltage range of 2.8V to 5.5V with only a minimum of four low-cost ceramic capacitors, eliminating the need for inductors Device. The LM2751 is suitable for a wide range of applications including white LED displays and keypad backlighting systems, as well as general-purpose boost or buck / boost regulators. The LM2751 chip can be pre-regulated with a fixed frequency to ensure that noise that mixes with the input current into the system is minimized and the switching frequency is predictable. Customers can choose to set the following switching frequency: 725kHz, 300kHz, 37kHz or 9.5kHz. LM2751 chip product features: 1. Two regulated outputs are available: 4.5V and 5.0V 2. Regulated output of high accuracy, the error will not exceed ± 3% 3. Peak efficiency of 90% or more 4. Output current: 150mA (operating at 4.5V) or 80mA (operating at 5.0V) 5. Input voltage range: 2.8 to 5.5 volts 6. Low input and output voltage ripple Shutdown current does not exceed 1mA (typical) 8. Compact solution - because no need to add inductors 9. The following switching frequencies are selectable: 725kHz, 300kHz, 37kHz or 9.5kHz 10. Package, Pricing and Availability National Semiconductor's LM2751 chip is available in a 10-pin LLP with no post-roll package and is available in a large number of available sizes, only 3mm x 3mm x 0.8mm. This chip also has a lead-free package to choose from. LM2751 chip to 1,000 units for the procurement unit, the single price of 1.10 US dollars.