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LP3987-2.85B3G Datasheet(PDF) 1 Page - Lowpower Semiconductor inc |
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LP3987-2.85B3G Datasheet(HTML) 1 Page - Lowpower Semiconductor inc |
1 / 8 page LP3987 LP3987-datasheet Oct.-2003 1-1 300mA,Ultra-LowNoise Ultra-fast CMOS LDO Regrlator General Description The LP3987 is designed for portable RF and wireless applications with demanding performance and space requirements. The LP3987 performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current. A noise bypass pin is available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The LP3987 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The LP3987 consumes less than 0.01µA in shutdown mode and has fast turn-on time less than 50µs. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the 5-lead of SOT-23 packages. Pin Configurations SOT-23-5 SOT-23 Typical Application Circuit Features Ultra-Low-Noise for RF Application 2.5V- 6V Input Voltage Range Low Dropout : 220mV @ 300mA High PSSR:-80dB at 1KHz < 0.01 A Standby Current When Shutdown TTL-Logic-Controlled Shutdown Input Custom Voltage Available Ultra-Fast Response in Line/Load Transient Quick Start-Up (Typically 50 s) Current Limiting and Thermal Shutdown Protection Applications PMP/PDA/MP3 players Cellular and Mobile phone RF Module Sensor Module Ordering Information LP3987 - □□ □ □□ F:PB-Free Package Type B5: SOT-23-5 B3: SOT-23 Output Voltage: SOT23-5(B5) Type: Type A B C D E H F G Voltage(V) 1.5 1.8 2.5 2.7 2.8 2.85 3.0 3.3 SOT23 (B3) Type: Type A B C D E H F G Voltage(V) 1.5 1.8 2.0 2.1 2.5 2.8 3.0 3.3 Note: 1. Output Voltage range from 1.5V to 3.3V; 2. 2.85V output order is LP3987-HB5F. |
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