ADP5042ACPZ-1 Analog Devices Inc, ADP5042ACPZ-1 Datasheet
ADP5042ACPZ-1
Specifications of ADP5042ACPZ-1
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ADP5042ACPZ-1 Summary of contents
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FEATURES Input voltage range: 2 5.5 V One 0.8 A buck regulator Two 300 mA LDOs 20-lead × LFCSP package Initial regulator accuracy: ±1% Overcurrent and thermal protection Soft start Undervoltage lockout Open drain ...
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ADP5042 TABLE OF CONTENTS Features .............................................................................................. 1 High Level Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 General Specification ................................................................... 3 Supervisory Specification ............................................................ 3 Buck Specifications ....................................................................... 5 LDO1, LDO2 Specifications ....................................................... ...
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SPECIFICATIONS GENERAL SPECIFICATION AVIN, VIN1 = ( 2.3 V, whichever is greater, AVIN, VIN1 ≥ VIN2, VIN3, T OUT1 are enabled. Table 1. Parameter AVIN UNDERVOLTAGE LOCKOUT Input Voltage Rising Input Voltage Falling SHUTDOWN CURRENT Thermal ...
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ADP5042 Parameter Watchdog 2 Timeout Period (t ) WD2 Option A Option B Option C Option D Option E Option F Option G Option H Watchdog 2 Power Off Period (t ) POFF Option A Option B WDI1 Pulse Width ...
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BUCK SPECIFICATIONS AVIN, VIN1 = 3 1 −40°C to +125°C for minimum/maximum specifications µH, C OUT1 J for typical specifications, unless otherwise noted. Table 3. Parameter INPUT CHARACTERISTICS Input Voltage Range ...
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ADP5042 Parameter Symbol 1 Load Regulation ∆V ∆V 2 DROPOUT VOLTAGE V ACTIVE PULL-DOWN R START-UP TIME T 3 CURRENT-LIMIT THRESHOLD I LIMIT OUTPUT NOISE OUT OUT POWER SUPPLY REJECTION RATIO PSRR 1 Based on an end-point calculation using 1 ...
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ABSOLUTE MAXIMUM RATINGS Table 6. Parameter AVIN, VINx, VOUTx, ENx, MODE WDIx, WMOD, WSTAT, nRSTO to GND Storage Temperature Range Operating Junction Temperature Range Soldering Conditions ESD Human Body Model ESD Charged Device Model ESD Machine Model Stresses ...
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ADP5042 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 8. Preliminary Pin Function Descriptions Pin No. Mnemonic Description not connect to this pin. 2 VOUT3 LDO2 Output Voltage and Sensing Input. 3 VIN3 LDO2 Input Supply (1 ...
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TYPICAL PERFORMANCE CHARACTERISTICS VIN1 = VIN2 = VIN3 = AVIN = 5 VOUT1 1 VOUT2 2 VOUT3 3 B CH1 2.0V/DIV 1MΩ 20.0M A CH1 W B CH2 2.0V/DIV 1MΩ 500M W B CH3 2.0V/DIV 1MΩ 20.0M W ...
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ADP5042 1.795 1.794 +85°C 1.793 1.792 +25°C 1.791 1.790 1.789 1.788 1.787 1.786 –40°C 1.785 1.784 0 0.1 0.2 0.3 0.4 OUTPUT CURRENT (A) Figure 9. Buck Load Regulation Across Temperature, VOUT1 = 1.8 V, PWM Mode 1.797 1.796 1.795 ...
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OUTPUT CURRENT (A) Figure 15. Buck Efficiency vs. Load Current, Across Temperature, VOUT1 = 1.8 V, PWM Mode 100 –40°C +25°C 90 +85°C 80 ...
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ADP5042 VOUT CH1 2.0V/DIV 1MΩ 20.0M A CH1 W B CH2 50.0mV/DIV 20. CH3 500mA/DIV 20.0M W Figure 21. Typical Waveforms, VOUT1 = 1.8 V, IOUT2 = 30 mA, Auto Mode ...
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SW 1 VOUT V 2 OUT LOAD 3 B CH1 4V/DIV 20.0M A CH3 W B CH2 50mV/DIV 20. CH3 50mA/DIV 1MΩ 20.0M W Figure 27. Buck Response to Load Transient, IOUT2 from mA, ...
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ADP5042 1.53 +85°C +25°C –40°C 1.52 1.51 1.5 1.49 1.48 1.47 0.0001 0.001 0.01 OUTPUT CURRENT (A) Figure 33. LDO1 Load Regulation Across Temperature, VIN2 = 3.3 V, VOUT2 = 1.5 V 1.520 100µA 1mA 10mA 1.515 100mA 150mA 1.510 ...
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INPUT VOLTAGE (V) Figure 39. LDO2 Ground Current vs. Input Voltage, Across Output Load, VOUT3 = 2.8 V ...
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ADP5042 100 CH2; V CH2; V CH2; V CH2; V CH2 0.0001 0.001 0.01 0.1 LOAD (mA) Figure 45. LDO1 Output Noise vs. Load Current, Across Input and Output Voltage 100 CH3; VOUT = 3.3V; VIN = 5V ...
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FREQUENCY (Hz) Figure 51. LDO2 PSRR Across Output Load, VIN3 = 3.1 V, VOUT3 = 2.8 V –10 1mA 10mA ...
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ADP5042 THEORY OF OPERATION VDDA AVIN GM ERROR PWM COMP VIN1 I LIMIT PWM/ PSM CONTROL LOW BUCK1 CURRENT SW DRIVER AND ANTISHOOT THROUGH PGND POFF MODE MODE ENABLE EN1 ENBK AND MODE CONTROL ENLDO1 EN2 ENLDO2 EN3 SEL VDDA ...
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Thermal Protection In the event that the junction temperature rises above 150°C, the thermal shutdown circuit turns off the buck and the LDOs. Extreme junction temperatures can be the result of high current operation, poor circuit board design, or high ...
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ADP5042 the amount of current that can flow from the input to the output. The negative current limit prevents the inductor current from reversing direction and flowing out of the load. 100% Duty Operation With a dropping input voltage or ...
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Watchdog 1 Input The ADP5042 features a watchdog timer that monitors micro- processor activity. A timer circuit is cleared with every low-to- high or high-to-low logic transition on the watchdog input pin (WDI1), which detects pulses as short as 80 ...
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ADP5042 Watchdog Status Indicator In addition to the dual watchdog function, the ADP5042 features a watchdog status monitor available on the WSTAT pin. This pin can be queried by the external processor to determine the origin of a reset. WSTAT ...
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APPLICATIONS INFORMATION BUCK EXTERNAL COMPONENT SELECTION Trade-offs between performance parameters such as efficiency and transient response can be made by varying the choice of external components in the applications circuit, as shown in Figure 66. Inductor The high switching frequency ...
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ADP5042 The peak-to-peak output voltage ripple for the selected output capacitor and inductor values is calculated using the following equation RIPPLE π × × × × OUT Capacitors ...
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Input and Output Capacitor Properties Use any good quality ceramic capacitors with the ADP5042 as long as they meet the minimum capacitance and maximum ESR requirements. Ceramic capacitors are manufactured with a variety of dielectrics, each with a different behavior ...
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ADP5042 using a slightly longer watchdog timeout. In the program that calls the subroutine, WDI1 is set high. The subroutine sets WDI1 low when it is called. If the program executes without error, WDI1 is toggled high and low with ...
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EVALUATION BOARD SCHEMATICS AND ARTWORK VIN1 = 2.3V TO 5.5V VIN2 = 1.7V TO 5.5V VIN3 = 1.7V TO 5.5V SUGGESTED LAYOUT 0.5 1.0 1.5 GPL 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5 ...
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ADP5042 BILL OF MATERIAL Table 14. Reference Value C1, C2, C3 µF, X5R, 6 4.7 µF, X5R µF, X5R, 6 Ω FILT L1 1 µH, 0.09 Ω, 290 mA ...
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FACTORY PROGRAMMABLE OPTIONS Table 15. Reset Voltage Threshold Options Selection 111 (For VIN = 5 V − 6%) 110 (For VOUT = 3.3 V) 101 (For VOUT = 3.3 V) 100 (For VOUT = 2.8 V) 011 (For VOUT = ...
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... ADP5042 OUTLINE DIMENSIONS PIN 1 INDICATOR 0.80 0.75 0.70 SEATING PLANE ORDERING GUIDE Model 1, 2 Regulator Settings ADP5042ACPZ-1-R7 VOUT1 = 1.8 V VOUT2 = 1.5 V VOUT3 = 3.3 V UVLO = 2.2 V Sequencing: LDO1, LDO2, buck ADP5042ACPZ-2-R7 VOUT1 = 1.5 V VOUT2 = 1.8 V VOUT3 = 3.3 V UVLO = 2.2 V Sequencing: LDO1, LDO2, buck ...
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NOTES Rev Page ADP5042 ...
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ADP5042 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08811-0-12/10(0) Rev Page ...