admin 发表于 2010-4-17 14:03:05

TC2054/2055/2186 Datasheet

http://www.microchip.com/stellent/images/mchpsiteimages/dwnfolder.gifTC2054/2055/2186 Datasheet


The TC2054, TC2055, and TC2186 are high accuracy (typically ±0.4%) CMOS upgrades for older (bipolar) low dropout regulators. Designed specifically for battery-operated systems, the devices’ total supply current is typically 55µA at full load ( 20 to 60 times lower than in bipolar regulators!). The devices’ key features include ultra low noise operation, very low dropout voltage - typically 45mV (TC2054); 90mV (TC2055); and 140mV (TC2186) at full load - and fast response to step changes in load. An error output (ERROR) is asserted when the devices are out-of-regulation (due to a low input voltage or excessive output current). Supply current is reduced to 0.5µA (max) and both VOUT and ERROR are disabled when the shutdown input is low. The devices also incorporate over-current protection. The TC2054, TC2055, and TC2186 are stable with a low ESR output capacitor of only 1µF and have a maximum output current of 50mA, 100mA, and 150mA, respectively. This LDO Family also features a fast response time (60msec typically) when released from shutdown.

Parameter NameValue
Max Input Voltage6
Output Voltage (v)1.8, 2.5, 2.7, 2.8, 2.85, 3.0, 3.3
Typical Active Current (µA)55
Typical Dropout Voltage @ Max. lout (mV)45
Typical Output Voltage Accuracy (%)0.4
Output Capacitor TypeCeramic/Aluminum/Tantalum
Output Current (mA)50

   Features
Extremely Low Supply Current (55 µA typical)
Very Low Dropout Voltage (45 mV typical @ 50 mA)
High Output Voltage Accuracy (±0.4% typical)
Standard or Custom Output Voltages
Power-Saving Shutdown Mode
ERROR Output Can Be Used as a Low Battery Detector, or Processor Reset Generator
Fast Shutdown Response Time (60 µsec typical)
Over-Current Protection
Space-Saving 5-Pin SOT-23A Package
Pin Compatible Upgrades for Bipolar Regulators


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