ADP1882 Analog Devices, ADP1882 Datasheet
ADP1882
Related parts for ADP1882
ADP1882 Summary of contents
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... Figure 2. ADP1882/ADP1883 Efficiency vs. Load Current Available in three frequency options (300 kHz, 600 kHz, and 1.0 MHz, plus the PSM option), the ADP1882/ADP1883 are well suited for a wide range of applications. These ICs not only operate from a 2. 5.5 V bias supply, but they also can accept a power input as high ...
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... Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 Thermal Resistance ...................................................................... 5 Boundary Condition .................................................................... 5 ESD Caution .................................................................................. 5 Pin Configuration and Function Descriptions ............................. 6 Typical Performance Characteristics ............................................. 7 ADP1882/ADP1883 Block Diagram ............................................ 18 Theory of Operation ...................................................................... 19 Startup .......................................................................................... 19 Soft Start ...................................................................................... 19 Precision Enable Circuitry ........................................................ 19 Undervoltage Lockout ............................................................... 19 Thermal Shutdown ..................................................................... 19 Programming Resistor (RES) Detect Circuit .......................... 20 Valley Current-Limit Setting .................................................... 20 Hiccup Mode During Short Circuit ...
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... ADP1882ARMZ-0.3/ADP1883ARMZ-0.3 (300 kHz) IN ADP1882ARMZ-0.6/ADP1883ARMZ-0.6 (600 kHz) ADP1882ARMZ-1.0/ADP1883ARMZ-1.0 (1.0 MHz μF to PGND 0.22 μF to GND ADP1882ARMZ-0.3/ADP1883ARMZ-0.3 (300 kHz) ADP1882ARMZ-0.6/ADP1883ARMZ-0.6 (600 kHz) ADP1882ARMZ-1.0/ADP1883ARMZ-1.0 (1.0 MHz 1 switching Q_BST + I COMP/EN < 285 mV BST, SD Rising V (see Figure 35 for temperature variation) ...
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... ADP1882/ADP1883 Parameter Symbol OUTPUT DRIVER CHARACTERISTICS High-Side Driver Output Source Resistance Output Sink Resistance Rise Time Fall Time t Low-Side Driver Output Source Resistance Output Sink Resistance 2 Rise Time t 2 Fall Time t Propagation Delays 2 DRVL Fall to DRVH Rise t DRVH Fall to DRVL Rise ...
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... In determining the values given in Table 2 and Table 3, natural 171.7°C/W convection was used to transfer heat to a 4-layer evaluation board. −40°C to +125°C −65°C to +150°C JEDEC J-STD-020 ESD CAUTION 300°C Rev Page ADP1882/ADP1883 1 θ Unit JA 213.1 °C/W 171.7 °C/W ...
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... Analog Ground Reference Pin of the IC. All sensitive analog components should be connected to this ground plane (see the Layout Considerations section). 5 VDD Bias Voltage Supply for the ADP1882/ADP1883 Controller, Including the Output Gate Drivers. A bypass capacitor of 1 μF directly from this pin to PGND and a 0.1 μF across VDD and GND are recommended. 6 DRVL Drive Output for the External Lower-Side N-Channel MOSFET ...
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... LOAD CURRENT (mA) Figure 6. Efficiency—300 kHz 5. 3.6V 13V IN (PSM) 10k 100k = 0.8 V OUT = 16. 13V (PSM) 10k 100k = 1.8 V OUT = 16.5V (PSM) 10k 100k = 7 V OUT Rev Page ADP1882/ADP1883 100 5.5V 5.5V (PSM 5.5V 5.5V 13V (PSM 5.5V 16.5V (PSM ...
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... ADP1882/ADP1883 100 V = 5.5V/V = 5.5V (PSM 3.6V 5.5V/V = 16. 5.5V/V = 13V 25° 0.8V, V OUT 1MHz SW 35 WURTH INDUCTOR: 30 744303022 0.22µH, DCR: 0.33mΩ INFINEON MOSFETS: 25 BSC042N03MS G (UPPER/LOWER) 20 100 1k LOAD CURRENT (mA) Figure 10. Efficiency—1.0 MHz, V ...
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... IN +125°C 4.005 +25°C –40°C 4.000 8k 9k 10k Figure 21. Output Voltage Accuracy—1.0 MHz OUT Rev Page ADP1882/ADP1883 13V +125°C +125°C +25°C +25°C –40°C –40° ...
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... ADP1882/ADP1883 0.804 0.803 0.802 0.801 0.800 0.799 0.798 V = 2.7V 2.7/3.6V 0.797 3.6V 3.6V TO 16. 5.5V 5.5/13V/16. 0.796 –40.0 –7.5 25.0 57.5 TEMPERATURE (°C) Figure 22. Feedback Voltage vs. Temperature 335 325 315 305 295 285 275 265 255 5.5V 245 DD DD +125°C +125°C 235 +25° ...
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... V Figure 33. Frequency vs. Load Current, 1.0 MHz, V OUT Rev Page ADP1882/ADP1883 V = 13V V = 16. +125°C +125°C +25°C +25°C –40°C –40°C 0.8k 1.6k 2.4k 3.2k 4.0k 4.8k 5.6k 6.4k 7.2k 8.0k 8.8k 9.6k LOAD CURRENT (mA) OUT 13V ...
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... ADP1882/ADP1883 1350 1300 1250 1200 1150 1100 1050 1000 V = 13V IN +125°C 950 +25°C –40°C 900 0 0.8k 1.6k 2.4k 3.2k 4.0k 4.8k 5.6k 6.4k 7.2k 8.0k LOAD CURRENT (mA) Figure 34. Frequency vs. Load Current, 1.0 MHz, V 2.658 2.657 2.656 2.655 2.654 2.653 2.652 2.651 2.650 2.649 –40 – TEMPERATURE (°C) Figure 35. UVLO vs. Temperature ...
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... CH1 50mV 5.1 5.5 CH3 10V Figure 44. Power Saving Mode (PSM) Operational Waveform, 100 CH1 50mV 5.1 5.5 CH3 10V Figure 45. PSM Waveform at Light Load, 500 mA DD Rev Page ADP1882/ADP1883 300kHz +125°C +25°C 1MHz –40°C 3.1 3.5 3.9 4.3 4.7 5.1 VREG (V) (Low Input Voltage) DD OUTPUT VOLTAGE ...
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... ADP1882/ADP1883 OUTPUT VOLTAGE 4 INDUCTOR CURRENT 1 SW NODE 3 CH1 5A Ω M400ns B CH3 10V CH4 100mV T 30.6% W Figure 46. CCM Operation at Heavy Load (See Figure 92 for Applications Circuit) OUTPUT VOLTAGE 2 12A STEP CH1 10A Ω B CH2 200mV M2ms W CH3 20V CH4 5V T 75.6% Figure 47. Load Transient Step— ...
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... A CH1 920mV CH3 10V CH1 50mV A CH2 8.20A CH3 10V Figure 57. Output Voltage Ripple Waveform During PSM Operation Rev Page ADP1882/ADP1883 OUTPUT VOLTAGE INDUCTOR CURRENT LOW SIDE SW NODE B CH2 5A Ω M2ms A CH1 W CH4 5V T 32.8% (See Figure 92 for Applications Circuit) ...
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... ADP1882/ADP1883 OUTPUT VOLTAGE 1 LOW SIDE 4 SW NODE 3 INDUCTOR CURRENT 2 B CH2 5A Ω CH1 1V M1ms W B CH3 10V CH4 2V T 63.2% W Figure 58. Soft Start and RES Detect Waveform T = 25°C LOW SIDE MINUS SW CH2 5V M40ns CH3 5V CH4 2V T 29.0% MATH 2V 40ns Figure 59 ...
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... VREG (V) Figure 64. Quiescent Current vs 5.1 5 Rev Page ADP1882/ADP1883 ...
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... ADP1882/ADP1883 ADP1882/ADP1883 BLOCK DIAGRAM PRECISION ENABLE BLOCK VDD REF_ZERO COMP C SS SS_REF COMP/EN ERROR AMP FB 0.8V LOWER COMP CLAMP REF_ZERO t -TIMER ON TO ENABLE ALL BLOCKS BIAS BLOCK AND REF SW INFORMATION PFM VDD STATE MACHINE t ON BG_REF DH_LO PSM IN_SS DRVH SW PWM ...
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... N-channel power stages to regulate output voltages as low as 0.8 V. STARTUP The ADP1882/ADP1883 have an input low voltage pin (VDD) for biasing and supplying power for the integrated MOSFET drivers. A bypass capacitor should be located directly across the VDD (Pin 5) and PGND (Pin 7) pins. Included in the power-up sequence is ...
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... Open 26 100 13 VALLEY CURRENT-LIMIT SETTING The architecture of the ADP1882/ADP1883 is based on valley current-mode control. The current limit is determined by three components: the R fier output voltage swing (COMP), and the current-sense gain. The COMP range is internally fixed at 1.5 V. The current-sense gain is programmable via an external resistor at the DRVL pin (see the Programming Resistor (RES) Detect Circuit section) ...
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... Although the ADP1882/ADP1883 have only four discrete current- sense gain settings for a given R variable, Table 6 and Figure 71 ON outline several available options for the valley current setpoint based on various R values. ON Table 6. Valley Current Limit Program Valley Current Level 47 kΩ 22 kΩ ...
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... MOSFETs or reduce efficiency as a result of excessive power loss. POWER SAVING MODE (PSM) VERSION (ADP1883) The ADP1883 is the power saving mode version of the ADP1882. The ADP1883 operates in the discontinuous conduction mode (DCM) and pulse skips at light load to midload currents. It outputs pulses, as necessary, to maintain output regulation ...
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... In this case, the switching frequency decreases, or experiences a foldback, to help facilitate output voltage recovery. IN Because the ADP1882/ADP1883 can respond rapidly to sudden changes in load demand, the recovery period in which the output voltage settles back to its original steady state operating point is much quicker than it would be for a fixed-frequency equivalent . ...
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... ADP1882/ADP1883 APPLICATIONS INFORMATION FEEDBACK RESISTOR DIVIDER The required resistor divider network can be determined for a given V value because the internal band gap reference (V OUT is fixed at 0.8 V. Selecting values for R T minimum output load current of the converter. Therefore, for a given value the R ...
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... MOSFET. ON Crossover Frequency The crossover frequency is the frequency at which the overall loop (system) gain V/V). For current-mode converters such as the ADP1882 recommended that the user set the crossover frequency between 1/10 and 1/15 of the switching frequency. × Z COMP ...
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... ADP1882/ADP1883 EFFICIENCY CONSIDERATIONS One of the important criteria to consider in constructing a dc-to-dc converter is efficiency. By definition, efficiency is the ratio of the output power to the input power. For high power applications at load currents the following are important MOSFET parameters that aid in the selection process: • ...
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... Ferrite inductors have the lowest core losses, whereas powdered iron inductors have higher core losses recommended to use shielded ferrite core material type inductors with the ADP1882/ ADP1883 for a high current, dc-to-dc switching application to achieve minimal loss and negligible electromagnetic interference (EMI) ...
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... R T which is below the maximum junction temperature of 125°C. DESIGN EXAMPLE The ADP1882/ADP1883 are easy to use, requiring only a few design criteria. For example, the example outlined in this section uses only four design criteria (typical), and f IN ...
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... Assume a load step occurs at the output, and no more than 5% is allowed for the output to deviate from the steady state operating point. Because the frequency is pseudo-fixed, the advantage of the ADP1882 is that the converter is able to respond quickly because of the immediate, though temporary, increase in switching frequency. ...
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... ADP1882/ADP1883 Loss Calculations Duty cycle = 1.8/ 0.15 5.4 mΩ. ON (N2 (body conduction time). BODY(LOSS 0.84 V (MOSFET forward voltage 3.3 nF (MOSFET gate input capacitance (total MOSFET gate charge). N1, 1.5 Ω (MOSFET gate input resistance). GATE [ ( ) = × + − × N1,N2(CL) N1(ON) = (0.15 × 0.0054 + 0.85 × 0.0054) × ( ...
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... LGL × LGL 1.2 16.5 4 × LGL 1.8 16.5 4 × LGL 2.5 16.5 4 × LGL 3.3 16.5 4 × 10 Rev Page ADP1882/ADP1883 , R = 100 kΩ kΩ, R CROSS RES BOT OUT C COMP (μF) (μH) (kΩ) (pF × 560 0.47 38.3 911 2 4 × 560 1.0 38 ...
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... ADP1882/ADP1883 Marking Code SAP Model ADP1882 LGH LGH 1 See the Inductor Selection section (see Table 9 2 560 μF Panasonic (SP-series mΩ, 3.7 A EEFUE0D561LR (4.3 mm × 7.3 mm × 4.2 mm). 3 270 μF Panasonic (SP-series mΩ, 3.7 A EEFUE0G271LR (4.3 mm × 7.3 mm × 4.2 mm). 4 330 μF Panasonic (SP-series mΩ, 3.3 A EEFUE0G331R (4.3 mm × 7.3 mm × 4.2 mm). ...
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... C2 C1 0.1µF 1µF Figure 83. ADP1882 High Current Evaluation Board Schematic (Blue Traces Indicate High Current Paths) Figure 83 shows the schematic of a typical ADP1882/ADP1883 used for a high power application. Blue traces denote high current pathways. VIN, PGND, and V possibly replicated, descending down into the multiple layers. ...
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... HIGH FREQUENCY CAPACITOR (C2) AS CLOSE AS POSSIBLE TO THE IC. INPUT CAPACITORS ARE MOUNTED CLOSE TO DRAIN OF Q1/Q2 AND SOURCE OF Q3/Q4. Figure 84. Overall Layout of the ADP1882 High Current Evaluation Board Figure 85. Layer 2 of Evaluation Board Rev Page OUTPUT CAPACITORS ARE MOUNTED ON THE RIGHTMOST AREA OF THE EVB, WRAPPING ...
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... Figure 86. Layer 3 of Evaluation Board BOTTOM RESISTOR TAP TO THE ANALOG GROUND PLANE. PGND SENSE TAP FROM NEGATIVE TERMINALS OF OUTPUT BULK CAPACITORS. THIS TRACK PLACEMENT SHOULD BE DIRECTLY BELOW THE VOUT SENSE LINE FROM FIGURE 84. Figure 87. Layer 4 (Bottom Layer) of Evaluation Board Rev Page ADP1882/ADP1883 ...
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... D and 1 − D. DIFFERENTIAL SENSING ) to the out- IN Because the ADP1882/ADP1883 operate in valley current- IN mode control, a differential voltage reading is taken across the drain and source of the lower-side MOSFET. The drain of the lower-side MOSFET should be connected as close as possible to Pin 9 (SW) of the IC ...
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... MURATA: (HIGH VOLTAGE INPUT CAPACITORS) 22µF, 25V, X7R, 1210 GRM32ER71E226KE15 L PANASONIC: (OUTPUT CAPACITORS) 180µF SP-SERIES, 4V, 10mΩ EEFUE0G181XR INFINEON MOSFETs (NO CONNECTION FOR Q2/Q4: BSC042N03MS G (LOWER SIDE) BSC080N03MS G (UPPER SIDE) WURTH INDUCTORS: 0.47µH, 0.8mΩ, 50A 744355147 Rev Page ADP1882/ADP1883 22µF 22µF 22µF N ...
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... ADP1882/ADP1883 DUAL-INPUT, 300 kHz HIGH CURRENT APPLICATIONS CIRCUIT HIGH VOLTAGE INPUT JP1 C ADP1882/ C 1000pF VIN C 1 70pF 24.9kΩ COMP/ 7.5kΩ OUT R2 15kΩ GND 4 VDD 0.1µF 1µF Figure 92. Applications Circuit for 13 V Input, 1.8 V Output 300 kHz (Q2/Q4 No Connect) ...
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... Temperature Range ADP1882ARMZ-0.3-R7 −40°C to +125°C ADP1882ARMZ-0.6-R7 −40°C to +125°C ADP1882ARMZ-1.0-R7 −40°C to +125°C ADP1882ARMZ-0.3-EVALZ ADP1882ARMZ-0.6-EVALZ ADP1882ARMZ-1.0-EVALZ ADP1883ARMZ-0.3-R7 −40°C to +125°C ADP1883ARMZ-0.6-R7 −40°C to +125°C ADP1883ARMZ-1.0-R7 −40°C to +125°C ADP1883ARMZ-0.3-EVALZ ADP1883ARMZ-0.6-EVALZ ADP1883ARMZ-1 ...
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... ADP1882/ADP1883 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08901-0-4/10(0) Rev Page ...