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SI91872DMP-30-T1 Fiches technique(PDF) 1 Page - Vishay Siliconix |
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SI91872DMP-30-T1 Fiches technique(HTML) 1 Page - Vishay Siliconix |
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1 / 9 page  Available Si91872 Vishay Siliconix Document Number: 72013 S-51147—Rev. F, 20-Jun-05 www.vishay.com 1 300-mA Low-Noise LDO Regulator With Error Flag and Discharge Option FEATURES D Ultra Low Dropout—300 mV at 300-mA Load D Low Noise—75 mVRMS (10-Hz to 100-kHz) D Out-of-Regulation Error Flag (power good) D Shutdown Control D 130-mA Ground Current at 300-mA Load D Fast Start-Up (50 mS) D 1.5% Guaranteed Output Voltage Accuracy D 400-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 Reverse Battery Protection D Built-in Short Circuit and Thermal Protection D Output—Auto-Discharge In Shutdown Mode D Fixed 1.2, 1.8, 2.5, 2.6, 2.8, 3.0, 3.3, 5.0-V Output Voltage Options D MLP33-5 PowerPAKr Package APPLICATIONS D Cellular Phones, Wireless Handsets D Noise-Sensitive Electronic Systems, Laptop and Palmtop Computers D PDAs D Pagers D Digital Cameras D MP3 Player D Wireless Modem DESCRIPTION The Si91872 is a 300-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 Si91872 also offers ultra low dropout voltage to prolong battery life in portable electronics. Systems requiring a quiet voltage source will benefit from the Si91872’s low output noise. The Si91872 is designed to maintain regulation while delivering 400-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 Si91872 to clamp the output voltage when it rises beyond normal regulation. The Si91872 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 Si91872 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 Si91872 is available in both the standard and lead (Pb)-free 5-pin MLP33 PowerPAK packages and is specified to operate over the industrial temperature range of −40_C to 85_. TYPICAL APPLICATION CIRCUIT Si91872 VIN GND SD VOUT ERROR VIN SD VOUT 2.2 mF 51 kW ERROR MLP33-5 2.2 mF |
Numéro de pièce similaire - SI91872DMP-30-T1 |
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Description similaire - SI91872DMP-30-T1 |
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