Input voltage range: 16 V Maximum output current: 800 mA Adjustable output from 5.1 V Low noise 1.0 �V rms total integrated noise from to 100 kHz 1.6 �V rms total integrated noise from to 100 kHz Noise spectral density: 1.7 nVHz from 10 kHz to 1 MHz Power supply rejection ratio (PSRR) 400 mA load >90 dB from 1 kHz to 100 kHz, VOUT at 1 MHz, VOUT 5 V Dropout voltage: V at VOUT 800 mA load Initial voltage accuracy: �1% Voltage accuracy over line, load and temperature: �2% Quiescent current (IGND): at no load Low shutdown current: 0.1 �A Stable with 10 �F ceramic output capacitor 8-lead LFCSP package and 8-lead SOIC package
800 mA Ultralow Noise, High PSRR, RF Linear Regulator ADM7151APPLICATIONS
Regulated power noise sensitive applications RF mixers, phase-locked loops (PLLs), voltage-controlled oscillators (VCOs), and PLLs with integrated VCOs Clock distribution circuits Ultrasound and other imaging applications High speed RF transceivers High speed, 16-bit or greater ADCs Communications and infrastructure Cable digital-to-analog converter (DAC) drivers
The is a low dropout (LDO) linear regulator that operates from 16 V and provides mA of output current. Using an advanced proprietary architecture, it provides high power supply rejection (>90 dB from 1 kHz to 1 MHz), ultralow noise (1.7 nVHz from 10 kHz to 1 MHz), and excellent line and load transient response with 10 �F ceramic output capacitor. The output voltage can be set to any voltage between 1.5 V and 5.1 V with two resistors. The ADM7151ARDZ-02 is available in two models that optimize power dissipation and PSRR performance as a function of input and output voltage. See Table 6 and Table 7 for selection guides. The ADM7151ARDZ-02 regulator output noise 1.0 �V rms from to 100 kHz, and the noise spectral density is 1.7 nV/Hz from 10 kHz to 1 MHz. The ADM7151ARDZ-02 is available 3 mm LFCSP and 8-lead SOIC packages, making it not only a very compact solution,
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but also providing excellent thermal performance for applications requiring mA of output current in a small, low profile footprint.
Figure 2. Noise Spectral Density (NSD) vs. Frequency for Various CBYPOne Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 �2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com
Features.............................................................................................. 1 Applications....................................................................................... 1 Typical Application Circuit............................................................. 1 General Description......................................................................... 1 Revision History............................................................................... 2 Specifications..................................................................................... 3 Input and Output Capacitor, Recommended Specifications.. 4 Absolute Maximum Ratings............................................................ 5 Thermal Data................................................................................ 5 Thermal Resistance...................................................................... 5 ESD Caution.................................................................................. 5 Pin Configurations and Function Descriptions........................... 6 Typical Performance Characteristics............................................. 7
Theory of Operation...................................................................... 15 Applications Information.............................................................. 16 Model Selection.......................................................................... 16 Capacitor Selection.................................................................... 16 Enable (EN) and Undervoltage Lockout (UVLO)................. 18 Start-Up Time............................................................................. 19 REF, BYP, and VREG Pins......................................................... 19 Current-Limit and Thermal Overload Protection................. 19 Thermal Considerations............................................................ 19 Printed Circuit Board Layout Considerations........................ 22 Outline Dimensions....................................................................... 23 Ordering Guide.......................................................................... 24
VIN 4.5 V, VOUT 1.5 V, VREF = VREF_SENSE (unity gain), VEN = VIN, IOUT = 10 mA, CIN = COUT = CREG = 10 �F, CREF = CBYP = 1 �F. = 25�C for typical specifications. to +125�C for minimum/maximum specifications, unless otherwise noted. Table 1.
Parameter INPUT VOLTAGE RANGE OPERATING SUPPLY CURRENT SHUTDOWN CURRENT OUTPUT NOISE SPECTRAL DENSITY POWER SUPPLY REJECTION RATIO ADM7151-04 Symbol VIN IGND IIN-SD OUTNOISE NSD PSRR Test Conditions/Comments IOUT 0 �A IOUT 800 mA VEN = GND to 100 kHz, independent of output voltage to 100 kHz, independent of output voltage 10 kHz to 1 MHz, independent of output voltage 1 kHz to 100 kHz, VIN 6.2 V, VOUT mA 1 MHz, VIN 6.2 V, VOUT mA 1 kHz to 100 kHz, VIN 6.2 V, VOUT mA 1 MHz, VIN 6.2 V, VOUT mA 1 kHz to 100 kHz, VIN 5.2 V, VOUT mA 1 MHz, VIN 5.2 V, VOUT mA 1 kHz to 100 kHz, VIN 5.2 V, VOUT mA 1 MHz, VIN 5.2 V, VOUT 400 mA VOUT = VREF IOUT mA < IOUT < 800 mA, over line, load and temperature VIN 16 V IOUT 800 mA Min 4.5 Typ Max Unit �A �V rms �V rms nV/Hz dB %
VOUT REGULATION Line Regulation Load Regulation 1 CURRENT-LIMIT THRESHOLD VREF Current Limit Threshold VOUT Current Limit Threshold 2 DROPOUT VOLTAGE 3 PULL-DOWN RESISTANCE VOUT Pull-Down Resistance VREG Pull-Down Resistance VREF Pull-Down Resistance VBYP Pull-Down Resistance START-UP TIME 4 VOUT Start-Up Time VREG Start-Up Time VREF Start-Up Time THERMAL SHUTDOWN Thermal Shutdown Threshold Thermal Shutdown Hysteresis UNDERVOLTAGE THRESHOLDS Input Voltage Rising Input Voltage Falling Hysteresis
1.0 VDROPOUT IOUT = 400 mA, VOUT 5 V IOUT = 800 mA, VOUT 5 V VEN 0 V, VOUT 1 V VEN 0 V, VREG 1 V VEN 0 V, VREF 1 V VEN 0 V, VBYP 1 V VOUT 5 V
VOUT-PULL VREG-PULL VREF-PULL VBYP-PULL tSTART-UP tREG-START-UP tREF-START-UP TSSD TSSD-HYS UVLORISE UVLOFALL UVLOHYS
Feature
- Input voltage range: 4.5 V to 16 V
- Maximum output current: 800 mA
- Adjustable output from 1.5 V to 5.1 V
- Low noise
- 1.0 μV rms total integrated noise from 100 Hz to 100 kHz
- 1.6 μV rms total integrated noise from 10 Hz to 100 kHz
- Noise spectral density: 1.7 nV√Hz from 10 kHz to 1 MHz
- Power supply rejection ratio (PSRR) at 400 mA load
- >90 dB from 1 kHz to 100 kHz, VOUT = 5 V
- >60 dB at 1 MHz, VOUT = 5 V
- Dropout voltage: 0.6 V at VOUT = 5 V, 800 mA load
- Initial voltage accuracy: ±1%
- Voltage accuracy over line, load and temperature: ±2%
- Quiescent current (IGND): 4.3 mA at no load
- Low shutdown current: 0.1 μA
- Stable with a 10 μF ceramic output capacitor
- 8-lead LFCSP package and 8-lead SOIC package
Applications
- Regulated power noise sensitive applications
- RF mixers, phase-locked loops (PLLs), voltage-controlled oscillators (VCOs), and PLLs with integrated VCOs
- Clock distribution circuits
- Ultrasound and other imaging applications
- High speed RF transceivers
- High speed, 16-bit or greater ADCs
- Communications and infrastructure
- Cable digital-to-analog converter (DAC) drivers
(Picture: Pinout)
