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SI91845DT-18-T1 датащи(PDF) 1 Page - Vishay Siliconix |
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SI91845DT-18-T1 датащи(HTML) 1 Page - Vishay Siliconix |
1 / 9 page Si91845/6 Vishay Siliconix Document Number: 71733 S-40591—Rev. B, 29-Mar-04 www.vishay.com 1 150-mA Ultra Low-Noise LDO Regulator With Error Flag and Discharge Option FEATURES D Ultra Low Dropout—130 mV at 150-mA Load D Ultra Low Noise—30 mV(rms) (10-Hz to 100-kHz Bandwidth) D Out-of-Regulation Error Flag (power good) D Shutdown Control D Only 110-mA Ground Current at 150-mA Load D Fast Start-Up (50 mS) D 1.5% Guaranteed Output Voltage Accuracy D 300-mA Peak Output Current Capability D Uses Low ESR Ceramic Capacitors D Fast Line and Load Transient Response (v 30 ms) D 1-mA Maximum Shutdown Current D Output Current Limit D Si91845: Output, Auto-Discharge in Shutdown Mode D Si91846: Output, No-Discharge in Shutdown Mode D Fixed 1.8, 2.0, 2.2, 2.5, 2.6, 2.7, 2.8, 2.85, 2.9, 3.0, 3.3, 3.5, 3.6, 5.0-V Output Voltage Options D Built-in Short Circuit and Thermal Protection D Reverse Battery Protection D Thin SOT23-6 Package APPLICATIONS D Cellular Phones, Wireless Handsets D Noise-Sensitive Electronic Systems, Laptop and Palmtop Computers D PDAs D Digital Cameras D Pagers D MP3 Players D Wireless Modems DESCRIPTION The Si91845/6 is a 150-mA CMOS LDO (low dropout) voltage regulator. It is the perfect choice for low voltage, low power applications. An ultra low ground current and ultra fast turn-on make this part attractive for battery operated power systems. The Si91845/6 also offers ultra low dropout voltage to prolong battery life in portable electronics. Systems requiring a quiet voltage source will benefit from the Si91845/6’s low output noise. The Si91845/6 is designed to maintain regulation while delivering 300-mA peak current, making it ideal for systems that have a high surge current upon turn-on. For better transient response and regulation, an active pull-down circuit is built into the Si91845/6 to clamp the output voltage when it rises beyond normal regulation. The Si91845 automatically discharges the output voltage by connecting the output to ground through a 100-W n-channel MOSFET when the device is put in shutdown mode. The Si91845/6 features reverse battery protection to limit reverse current flow to approximately 1-mA in the event reversed battery is applied at the input, thus preventing damage to the IC. The Si91845/6 is available in both standard and lead (Pb)-free packages. TYPICAL APPLICATION CIRCUIT 3 2 Si91845/6 1 4 6 VIN GND SD VOUT ERROR VIN SD VOUT 1 mF 1 mF 51 kW 5 BP ERROR 10 nF Thin SOT-23, 6-Lead |
Аналогичный номер детали - SI91845DT-18-T1 |
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Аналогичное описание - SI91845DT-18-T1 |
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