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SI9181DQ-29-T1 Datasheet(PDF) 1 Page - Vishay Siliconix |
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SI9181DQ-29-T1 Datasheet(HTML) 1 Page - Vishay Siliconix |
1 / 10 page Si9181 Vishay Siliconix Document Number: 71119 S-40694—Rev. D, 19-Apr-04 www.vishay.com 1 Micropower 350-mA CMOS LDO Regulator With Error Flag/Power-On-Reset FEATURES D Low 150-mV Dropout at 350-mA Load D Guaranteed 350-mA Output Current D 600-mA Peak Output Current Capability D Uses Low ESR Ceramic Output Capacitor D Fast Load and Line Transient Response D Only 100-mV(rms) Noise With Noise Bypass Capacitor D 1-mA Maximum Shutdown Current D Built-in Short Circuit and Thermal Protection D Out-Of-Regulation Error Flag (Power Good or POR) D Fixed 1.5-V, 1.8-V, 2.0-V, 2.5-V, 2.8-V, 2.85-V, 2.9 V, 3.0-V, 3.3-V, 5.0-V, or Adjustable Output Voltage Options D Other Output Voltages Available by Special Order APPLICATIONS D Cellular Phones D Laptop and Palm Computers D PDA, Digital Still Cameras DESCRIPTION The Si9181 is a 350-mA CMOS LDO (low dropout) voltage regulator. The device features ultra low ground current and dropout voltage to prolong battery life in portable electronics. The Si9181 offers line/load transient response and ripple rejection superior to that of bipolar or BiCMOS LDO regulators. The device is designed to maintain regulation while delivering 600-mA peak current. This is useful for systems that have high surge current upon turn-on. The Si9181 is designed to drive the lower cost ceramic, as well as tantalum, output capacitors. The device is guaranteed stable from maximum load current down to 0-mA load. In addition, an external noise bypass capacitor connected to the device’s CNOISE pin will lower the LDO’s output noise for low noise applications. The Si9181 also includes an out-of-regulation error flag. When the output voltage is 5% below its nominal output voltage, the error flag output goes low. If a capacitor is connected to the device’s delay pin, the error flag output pin will generate a delayed power-on-reset signal. The Si9181 is available in both standard and lead (Pb)-free packages. TYPICAL APPLICATIONS CIRCUITS FIGURE 1. Fixed Output FIGURE 2. Adjustable Output FIGURE 3. Low Noise, Full Features Application CNOISE SD 18 DELAY ERROR 27 GND SENSE/ADJ 36 VIN VOUT 45 GND VIN 2.2 mF 2.2 mF VOUT Si9181 CNOISE 18 DELAY ERROR 27 GND SENSE/ADJ 36 VIN VOUT 45 GND VIN 2.2 mF 2.2 mF VOUT Si9181 CNOISE 18 DELAY ERROR 27 GND SENSE/ADJ 36 VIN VOUT 45 GND VIN 2.2 mF 2.2 mF VOUT Si9181 POR ON/OFF 0.1 mF 0.1 mF 1 MW SD SD |
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