Datasheet ADP7183 (Analog Devices)

−300 mA, Ultralow Noise, High PSRR, Low Dropout Linear Regulator Data Sheet ADP7183 FEATURES TYPICAL APPLICATION CIRCUITS Input voltage range: −2.0 V to −5.5 V Maximum output current: −300 mA EP V VIN VOUT V IN = –3.8V OUT = –3.3V Fixed output voltage options: −0.5 V to −4.5 V CIN COUT 4.7µF SENSE 4.7µF Adjustable output from −0.5 V to −VIN + 0.5 V ADP7183 Low output noise: 4 μV rms from 100 Hz to 100 kHz +1.25V VA OFF 0V EN C C Noise spectral density: 20 nV/√Hz, 10 kHz to 1 MHz AFB A 10nF 1µF –1.3V VAFB Power supply rejection ratio (PSRR) at −300 mA load ON 75 dB typical at 10 kHz VREG GND C
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62 dB typical at 100 kHz REG 1µF
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40 dB typical at 1 MHz
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Low dropout voltage: −130 mV typical at I
Figure 1. ADP7183 with Fixed Output Voltage, VOUT = −3.3 V
OUT = −300 mA Initial output voltage accuracy (VOUT): ±0.5% at IOUT = −10 mA Output voltage accuracy over line, load, and temperature: ±2.6% EP V VIN VOUT V Operating supply current (I IN = –3V OUT = –2.5V GND): −0.6 mA typical at no load CIN COUT 4.7µF SENSE 4.7µF Low shutdown current: −2 μA typical at VIN = −5.5 V ADP7183 Stable with small 4.7 μF ceramic input and output capacitor +1.25V VA R1 Positive or negative enable logic OFF 0V EN C C AFB A 100kΩ 10nF 1µF –1.3V VAFB Current-limit and thermal overload protection ON R2 8-lead, 2 mm × 2 mm LFCSP package VREG GND 24.9kΩ C Supported by ADIsimPOWER v oltage regulator design tool REG 1µF
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APPLICATIONS
Figure 2. ADP7183 with Adjustable Output Voltage, VOUT = −2.5 V
Regulation to noise sensitive applications: analog-to-digital converters (ADCs), digital-to-analog converters (DACs), precision amplifiers Communications and infrastructure Medical and healthcare Industrial and instrumentation GENERAL DESCRIPTION
The ADP7183 is a complementary metal oxide semiconductor Additional voltages available by special order are −0.8 V, −0.9 V, (CMOS), low dropout (LDO) linear regulator that operates −1.3 V, −2.8 V, −4.2 V, and −4.5 V. An adjustable version is also from −2.0 V to −5.5 V and provides up to −300 mA of output available that allows output voltages that range from −0.5 V to current. This LDO regulator is ideal for regulation of high −VIN + 0.5 V with an external feedback divider. performance analog and mixed-signal circuits operating The enable logic feature is capable of interfacing with positive from −0.5 V down to −4.5 V. Using an advanced proprietary or negative logic levels for maximum flexibility. architecture, the ADP7183 provides high PSRR and low noise, and it achieves excellent line and load transient response with a The ADP7183 regulator output noise is 4 μV rms independent small 4.7 μF ceramic output capacitor. of the output voltage. The ADP7183 is available in an 8-lead, 2 mm × 2 mm LFCSP, making it not only a very compact The ADP7183 is available in 15 fixed output voltage options. solution but also providing excellent thermal performance for The following voltages are available from stock: −0.5 V, −1.0 V, applications requiring up to −300 mA of output current in a −1.2 V, −1.5 V, −1.8 V, −2.0 V, −2.5 V, −3.0 V, and −3.3 V. small, low profile footprint.
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Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUITS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS INPUT AND OUTPUT CAPACITOR RECOMMENDED SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION ADJUSTABLE MODE OPERATION ENABLE PIN OPERATION START-UP TIME APPLICATIONS INFORMATION ADIsimPOWER DESIGN TOOL CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor CA and CAFB Capacitors Input and Output Capacitor Properties UNDERVOLTAGE LOCKOUT (UVLO) CURRENT-LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE