Datasheet ADP7142 (Analog Devices)

40 V, 200 mA, Low Noise, CMOS LDO Linear Regulator Data Sheet ADP7142 FEATURES TYPICAL APPLICATION CIRCUITS Low noise: 11 μV rms independent of fixed output voltage ADP7142 PSRR of 88 dB at 10 kHz, 68 dB at 100 kHz, 50 dB at 1 MHz, VIN = 6V VOUT = 5V VIN VOUT VOUT ≤ 5 V, VIN = 7 V CIN COUT 2.2µF 2.2µF Input voltage range: 2.7 V to 40 V SENSE/ADJ Maximum output current: 200 mA ON Initial accuracy: ±0.8% EN SS GND C OFF SS
1
Accuracy over line, load, and temperature 1nF
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−1.2% to +1.5%, TJ = −40°C to +85°C
Figure 1. ADP7142 with Fixed Output Voltage, 5 V
±1.8%, TJ = −40°C to +125°C Low dropout voltage: 200 mV (typical) at a 200 mA load, ADP7142 V V OUT = 5 V IN = 7V VOUT = 6V VIN VOUT User programmable soft start (LFCSP and SOIC only) CIN C 2kΩ OUT 2.2µF 2.2µF Low quiescent current, I SENSE/ADJ GND = 50 μA (typical) with no load 10kΩ Low shutdown current: 1.8 μA at V ON IN = 5 V, 3.0 μA at VIN = 40 V Stable with a small 2.2 μF ceramic output capacitor EN SS GND C OFF SS Fixed output voltage options: 1.8 V, 2.5 V, 3.3 V, 3.8 V, and 5.0 V 1nF
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15 standard voltages between 1.2 V and 5.0 V are
Figure 2. ADP7142 with 5 V Output Adjusted to 6 V
available Adjustable output from 1.2 V to VIN – VDO, output can be adjusted above initial set point Precision enable 2 mm × 2 mm, 6-lead LFCSP, 8-Lead SOIC, 5-Lead TSOT Supported by ADIsimPower tool APPLICATIONS Regulation to noise sensitive applications ADC, DAC circuits, precision amplifiers, power for VCO VTUNE control Communications and infrastructure Medical and healthcare Industrial and instrumentation GENERAL DESCRIPTION
(adjustable), 1.8 V, 2.5 V, 3.3 V, 3.8 V, and 5.0 V. Additional The ADP7142 is a CMOS, low dropout (LDO) linear regulator voltages available by special order are 1.5 V, 1.85 V, 2.0 V, 2.2 V, that operates from 2.7 V to 40 V and provides up to 200 mA of 2.75 V, 2.8 V, 2.85 V, 4.2 V, and 4.6 V. output current. This high input voltage LDO is ideal for the Each fixed output voltage can be adjusted above the initial set regulation of high performance analog and mixed signal point with an external feedback divider. This allows the ADP7142 circuits operating from 39 V down to 1.2 V rails. Using an to provide an output voltage from 1.2 V to VIN − VDO with high advanced proprietary architecture, the device provides high PSRR and low noise. power supply rejection, low noise, and achieves excellent line and User programmable soft start with an external capacitor is load transient response with a small 2.2 μF ceramic output available in the LFCSP and SOIC packages. capacitor. The ADP7142 regulator output noise is 11 μV rms independent of the output voltage for the fixed options of 5 V The ADP7142 is available in a 6-lead, 2 mm × 2 mm LFCSP or less. making it not only a very compact solution, but it also provides excellent thermal performance for applications requiring up to The ADP7142 is available in 15 fixed output voltage options. 200 mA of output current in a small, low profile footprint. The The following voltages are available from stock: 1.2 V ADP7142 is also available in a 5-lead TSOT and an 8-lead SOIC.
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Document Outline Features Applications Typical Application Circuits General Description Revision History Specifications Input and Output Capacitance, 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 Programable Precision Enable Soft Start Noise Reduction of the ADP7142 in Adjustable Mode Effect of Noise Reduction on Start-Up Time Current-Limit and Thermal Overload Protection Thermal Considerations Printed Circuit Board Layout Considerations Outline Dimensions Ordering Guide