Datasheet ADP320 (Analog Devices)

Triple, 200 mA, Low Noise, High PSRR Voltage Regulator Data Sheet ADP320 FEATURES TYPICAL APPLICATION CIRCUITS Bias voltage range (VBIAS): 2.5 V to 5.5 V ADP320 VBIAS LDO input voltage range (VIN1/VIN2, VIN3): 1.8 V to 5.5 V VBIAS 2.5V TO Three 200 mA low dropout voltage regulators 5.5V +1µF 16-lead, 3 mm × 3 mm LFCSP VIN1/VIN2 1.8V TO Initial accuracy: ±1% 5.5V + LDO 1 VOUT1 1µF Stable with 1 µF ceramic output capacitors ON EN1 + OFF EN LD1 No noise bypass capacitor required 1µF VBIAS 3 independent logic controlled enables Over current and thermal protection LDO 2 VOUT2 ON Key specifications EN2 OFF + EN LD2 1µF High PSRR VBIAS 76 dB PSRR up to 1 kHz 1.8V TO VIN3 5.5V + 70 dB PSRR 10 kHz LDO 3 VOUT3 1µF ON EN3 + 60 dB PSRR at 100 kHz OFF EN LD3 1µF 40 dB PSRR at 1 MHz GND
001
Low output noise
09874-
24 µV rms typical output noise at VOUT = 1.2 V
Figure 1. Typical Application Circuit
43 µV rms typical output noise at VOUT = 2.8 V Excellent transient response Low dropout voltage: 110 mV @ 200 mA load 85 µA typical ground current at no load, all LDOs enabled 100 µs fast turn-on circuit Guaranteed 200 mA output current per regulator −40°C to +125°C junction temperature APPLICATIONS Mobile phones Digital cameras and audio devices Portable and battery-powered equipment Portable medical devices Post dc-to-dc regulation GENERAL DESCRIPTION
The ADP320 200 mA triple output LDO combines high PSRR, low LDO offers much lower noise performance than competing LDOs noise, low quiescent current, and low dropout voltage in a voltage without the need for a noise bypass capacitor. regulator ideal y suited for wireless applications with demanding The ADP320 triple LDO is available in a miniature 16-lead 3 mm × performance and board space requirements. 3 mm LFCSP package and is stable with tiny 1 µF ±30% ceramic output The low quiescent current, low dropout voltage, and wide input capacitors, resulting in the smal est possible board area for a wide voltage range of the ADP320 triple LDO extend the battery life of variety of portable power needs. portable devices. The ADP320 triple LDO maintains power supply The ADP320 triple LDO is available in output voltage combin- rejection greater than 60 dB for frequencies as high as 100 kHz ations ranging from 0.8 V to 3.3 V and offers over current and while operating with a low headroom voltage. The ADP320 triple thermal protection to prevent damage in adverse conditions.
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Document Outline Features Applications Typical Application Circuits General Description Revision History Specifications Input and Output Capacitor, Recommended Specifications Absolute Maximum Ratings THERMAL DATA Thermal Resistance ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information ADIsimPower Design Tool Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties Undervoltage Lockout Enable Feature Current-Limit and Thermal Overload Protection Thermal Considerations Printed Circuit Board Layout Considerations Outline Dimensions Ordering Guide