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SA57000-28UK Datasheet(PDF) 2 Page - NXP Semiconductors |
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SA57000-28UK Datasheet(HTML) 2 Page - NXP Semiconductors |
2 / 8 page Philips Semiconductors Product data SA57000-XX CapFREE ™ 150 mA, low-noise, low dropout regulator with thermal protection 2 2001 Aug 27 853–2265 26991 GENERAL DESCRIPTION The CapFREE ™ SA57000 is the first in a new family of unique low dropout regulators. It needs no external capacitors, offers a low output noise voltage of 30 µVRMS, and an ultra-low dropout voltage of 55 mV @ 50 mA output current. To accommodate high density layouts, it is packaged in the small footprint 5 leaded SOT23-5 (SO5). It is ideal for all portable and cellular phone applications. Additional features include power and thermal shutdown, output current limitation, power OK status, thermal warning, and external logic-controlled on-off via the PWRON pin. FEATURES • CapFREE: No output capacitor needed, stable for all capacitive loads, regardless of ESR • Low 30 µV RMS noise without noise bypass capacitor • Preset output voltages to 2.5 V, 2.8 V, 3.0 V, 3.3 V and 3.6 V; other voltages available upon request. 2% output voltage accuracy • 150 mA maximum output current with current limitation • Typical dropout voltage 55 mV @ 50 mA output current • 85 µA typical ground current • Thermal-overload and short-circuit protection • PWROK pin: both power status and thermal warning indicator • PWRON pin offers logic-controlled shutdown • Maximum line regulation: 0.1%/V • Maximum load regulation: 0.02%/mA. APPLICATIONS • Cordless and mobile phones • Industrial and medical equipment • Other battery-powered equipment. SIMPLIFIED SYSTEM DIAGRAM SA00557 LOW-PASS FILTER OUTPUT AMP. LOGIC CONTROL BIAS NETWORK PWROK VOUT PWRON PWRON TEMPERATURE SENSOR BAND GAP SA57000 3 PWRON PWRON PWRON GND VIN OVER 144 °C (POWER/THERMAL SHUTDOWN) OVER 127 °C (POWER/THERMAL WARNING) 2 1 5 4 Figure 1. Simplified system diagram. CapFREE is a trademark of Philips Electronics North America Corporation. |
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