ADP1610 Analog Devices, ADP1610 Datasheet
ADP1610
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ADP1610 Summary of contents
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... PWM current mode architecture allow excellent transient response, easy noise filtering, and the use of small, cost-saving external inductors and capacitors. The ADP1610 is offered in the RoHS compliant 8-lead MSOP and operates over the temperature range of −40°C to +85°C. FUNCTIONAL BLOCK DIAGRAM ...
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... ADP1610 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 ESD Caution .................................................................................. 4 Pin Configuration and Function Descriptions ............................. 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ...................................................................... 10 Current Mode PWM Operation ............................................... 10 Frequency Selection ................................................................... 10 Soft Start ...................................................................................... 10 On/Off Control ........................................................................... 10 REVISION HISTORY 9/08—Rev Rev. A Changes to Table 4 ...
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... Rev Page Min Typ Max 2.5 5.5 390 600 0. 0.05 ±3 1.212 1.230 1.248 −0.15 +0.15 100 60 10 200 400 0.01 20 2.0 0.49 0.7 0.885 0.89 1.23 1 0.6 2.2 0. 2.2 2.4 2.5 220 ADP1610 Unit V μA μ mV/ %/V μA mΩ μA A MHz MHz % V V μA μ ...
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... COMP ERROR AMP REF BIAS RAMP S GEN DRIVER COMPARATOR OSC CURRENT SENSE SOFT START AMPLIFIER Figure 2. Block Diagram and Typical Application Circuit Rev Page ADP1610 OUT C OUT 4 GND ...
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... IN Main Power Supply Input. IN powers the ADP1610 internal circuitry. Connect IN to the input source voltage. Bypass IN to GND with a 10 μF or greater capacitor as close to the ADP1610 as possible Frequency Setting Input. RT controls the switching frequency. Connect RT to GND to program the oscillator to 700 kHz, or connect program the oscillator to 1 ...
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... ADP1610 TYPICAL PERFORMANCE CHARACTERISTICS 100 V = 10V OUT F = 700kHz 10µ LOAD CURRENT (mA) Figure 4. Output Efficiency vs. Load Current 100 V = 10V OUT F = 1.2MHz 4.7µ LOAD CURRENT (mA) Figure 5. Output Efficiency vs. Load Current ...
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... 2.5V 0. 5.5V IN 0.45 0.40 0.35 0.30 – Figure 14. Quiescent Current vs. Ambient Temperature 2 1.8 1.6 1.4 1.2 1.0 0.8 0.6 –40 95 110 125 Figure 15. Supply Current vs. Ambient Temperature Rev Page ADP1610 = 700kHz 2.5V IN – AMBIENT TEMPERATURE ( ° 1.23kHz 2.5V IN – AMBIENT TEMPERATURE ( ° ...
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... ADP1610 1 700kHz SW 1 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 –40 – AMBIENT TEMPERATURE ( ° C) Figure 16. Supply Current vs. Ambient Temperature 3 3. 0.4V 3.0 2.5 2.0 1.5 1.0 0.5 0 –40 15 AMBIENT TEMPERATURE (°C) Figure 17. Supply Current in Shutdown vs. Ambient Temperature CH1 = IL 500mA/DIV V IN CH2 = V 5V/DIV V SW OUT I LOAD μ 10.0mV Ω CH2 5.00V ...
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... Figure 24. Start-Up Response from Shutdown 3. 10V OUT 0.2A OUT C = 10nF SS 1 CH1 680mV CH3 10.0V Figure 25. Start-Up Response from Shutdown Rev Page ADP1610 CH1 = IL 1A/DIV V = 3.3V IN CH2 = 10V IN OUT CH3 = 0.2A OUT OUT CH4 = 700kHz C = 0nF 10.0mVΩ ...
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... SOFT START To prevent input inrush current at startup, connect a capacitor from SS to GND to set the soft start period. When the ADP1610 is in shutdown ( GND) or the input voltage is below the 2.4 V undervoltage lockout voltage internally shorted to GND to discharge the soft start capacitor. When the ADP1610 is turned on, SS sources 3 μ ...
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... ESR capacitor in parallel with a 0.1 μF low ESR capacitor as close to the ADP1610 as possible. The output capacitor maintains the output voltage and supplies current to the load while the ADP1610 switch is on. The value (6) and characteristics of the output capacitor greatly affect the output voltage ripple and stability of the regulator. Use a low ESR output capacitor ...
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... ADP1610 For very low ESR capacitors, such as ceramic capacitors, the ripple current due to the capacitance is calculated using the following equation. Because the capacitor discharges during the on-time (t ), the charge removed from the capacitor (Q ON current multiplied by the on-time. The output voltage ripple (Δ ...
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... Many diode manufacturers derate the current capability of the diode as a function of the duty cycle. Verify that the output diode is rated to handle the average output load current with the minimum duty cycle. The minimum duty cycle of the ADP1610 is calculated by the following equations: − − ...
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... Table 6. Typical Soft Start Period V (V) IN 3.3 (19) 5 Conversely, if fast startup is a requirement, the soft start capacitor can be reduced or even removed, allowing the ADP1610 to start quickly, but allowing greater peak switch current (see Figure 22 to Figure 25). Rev Page (kΩ) R (kΩ) C ...
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... APPLICATION CIRCUITS The circuit in Figure 27 shows the ADP1610 in a step-up confi- guration that can be used to generate regulator with the following specifications 2 5 ≤ 400 mA. OUT 4.7µH L ADP1610 3. 10µF SS COMP GND ...
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... In steady state, the average voltage the input voltage. When the ADP1610 switch turns on and the diode turns off, the input voltage provides energy to L1, and C1 provides energy to L2. When the ADP1610 switch turns off and the diode turns on, the energy in L1 and L2 is released to charge the output capacitor (C ...
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... To prevent radiated noise injection, high impedance traces are not to be routed near any node connected near the inductor. Figure 31. Sample Application Board (Bottom Layer kept as short as Rev Page Figure 32. Sample Application Board (Top Layer) Figure 33. Sample Application Board (Silkscreen Layer) ADP1610 ...
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... ADP1610 OUTLINE DIMENSIONS ORDERING GUIDE Model Temperature Range 1 ADP1610ARMZ-R7 −40°C to +85°C 1 ADP1610-EVALZ RoHS Compliant Part. 3.20 3.00 2.80 5. 3.20 4.90 3.00 4.65 2. PIN 1 0.65 BSC 0.95 0.85 1.10 MAX 0.75 8° 0.15 0.38 0.23 0° 0.00 0.22 0.08 COPLANARITY SEATING 0.10 PLANE COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 34. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters ...
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... NOTES Rev Page ADP1610 ...
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... ADP1610 NOTES ©2004–2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04472-0-9/08(A) Rev Page ...