ADP172 Analog Devices, Inc., ADP172 Datasheet
ADP172
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ADP172 Summary of contents
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... ADP172 ideal for battery-operated portable equipment. The ADP172 is capable of 31 fixed-output voltage options, ranging from 0 3.0 V. The ADP172 is optimized for stable operation with small 1 μF ceramic output capacitors. Ideal for powering digital processors, the ADP172 exhibits good transient perform- ance and occupies minimal board space ...
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... ADP172 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Typical Application Circuits ............................................................ 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 Configuration and Function Descriptions ............................. 6 REVISION HISTORY 4/10—Rev Rev. A Changes to Ordering Guide .......................................................... 17 2/10— ...
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... −40°C to +125°C J 120 400 450 150 15 1.2 0 OUT = 1 OUT = 1 OUT = 0 OUT ADP172 Max Unit 3.6 V μA 60 μA μA 100 μA μA 210 μA μA 260 μA μA 2 μA 25 μ +1 ...
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... POWER SUPPLY REJECTION RATIO 1 The current from the external resistor divider network in the case of adjustable voltage output (as with the ADP172) should be subtracted from the ground current measured. 2 Based on an end-point calculation using 1 mA and 300 mA loads. See Figure 4 for typical load regulation performance for loads less than 1 mA. ...
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... THERMAL DATA Absolute maximum ratings apply only individually, not in combination. The ADP172 can be damaged when the junction temperature limits are exceeded. Monitoring ambient temperature does not guarantee that T J temperature limits. In applications with high power dissipation and poor thermal resistance, the maximum ambient temperature may have to be derated ...
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... ADP172 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Description A1 VIN Regulator Input Supply. Bypass VIN to GND with a 1 μF or greater capacitor. A2 VOUT Output Voltage Adjust Input. Connect the midpoint of an external divider from VOUT to GND to this pin ...
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... LOAD CURRENT (mA) Figure 7. Ground Current vs. Load Current I LOAD I LOAD I LOAD LOAD 40 I LOAD 20 I LOAD 0 2.1 2.3 2.5 2.7 2.9 3.1 V (V) IN Figure 8. Ground Current vs. Input Voltage ADP172 125 100 1000 = 300mA = 100mA = 10mA = 1mA = 100µA = 10µA 3.3 3.5 ...
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... ADP172 5 2. 2. 3. 3.5V 3 3.6V IN 2.5 2.0 1.5 1.0 0.5 0 –50 – TEMPERATURE (°C) Figure 9. Shutdown Current vs. Temperature at Various Input Voltages 25° 0 LOAD CURRENT (mA) Figure 10. Dropout Voltage vs. Load Current 1.85 1.80 1.75 1.70 1.65 1.60 1.55 1.50 1.55 1.60 1.65 1.70 1.75 V (V) IN Figure 11. Output Voltage vs. Input Voltage (in Dropout) ...
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... M40.00µs A CH1 W T 160.680µs Figure 19. Load Transient Response, C and C IN OUT I LOAD 1mA TO 300mA LOAD STEP, 2.5A/µs V OUT OUT 200mA Ω B CH2 50.0mV M40.0µs A CH1 W T 159.800µs and C IN OUT ADP172 1000 = 1.8V 124mA = 1 μF = 1.8V 204mA = 4.7 μF ...
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... ADP172 V IN 2.6V TO 3.6V INPUT VOLTAGE STEP, 2V/µ OUT 2 CH1 1.00V CH2 10.0mV M10.0µs A CH1 T Figure 21. Line Transient Response, Load Current = 1.8V OUT 1µF IN OUT 2.94V 39.3000% Rev Page 2.6V TO 3.6V INPUT VOLTAGE STEP 2V/µ OUT 2 V OUT ...
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... PMOS device is pulled higher, allowing less current VOUT to pass and decreasing the output voltage. The ADP172 uses the EN pin to enable and disable the VOUT R1 pin under normal operating conditions. When EN is high, VOUT turns on; when EN is low, VOUT turns off. For automatic startup, EN can be tied to VIN ...
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... If greater than 1 μF of output capacitance is required, the input capacitor should be increased to match it. Input and Output Capacitor Properties Any good quality ceramic capacitor can be used with the ADP172, as long as it meets the minimum capacitance and maximum ESR requirements. Ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior over temper- ature and applied voltage ...
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... V. This ensures that the ADP172 inputs and the output behave in a predictable manner during power-up. ENABLE FEATURE The ADP172 uses the EN pin to enable and disable the VOUT pin under normal operating conditions. As shown in Figure 27, when a rising voltage on EN crosses the active threshold, VOUT turns on ...
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... Consider the case where a hard short from VOUT to GND occurs. At first, the ADP172 limits the current so that only 450 mA is conducted into the short. If self-heating of the junction is great enough to cause its temperature to rise above 150°C, thermal shutdown activates, turning off the output and reducing the output current to 0 ...
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... × Ψ 58°C/W for the 4-Ball WLCSP package MAX 300mA LOAD I = 200mA LOAD 10mA I = 100mA LOAD LOAD LOAD I = 50mA LOAD 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 V – V (V) IN OUT Figure 36 85°C A ADP172 = 200mA = 50mA = 10mA = 1mA 2.3 2.5 = 10mA = 1mA 2.3 2.5 (5) = 1mA 2.3 2.5 ...
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... CONSIDERATIONS Heat dissipation from the package can be improved by increasing the amount of copper attached to the pins of the ADP172. However, as can be seen from Table 6, a point of diminishing returns is eventually reached, beyond which an increase in the copper size does not yield significant heat dissipation benefits. ...
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... ADP172ACBZ-1.26-R7 −40°C to +125°C ADP172ACBZ-1.5-R7 −40°C to +125°C ADP172ACBZ-1.8-R7 −40°C to +125°C ADP172ACBZ-2.1-R7 −40°C to +125°C ADP172ACBZ-3.0-R7 −40°C to +125° RoHS Compliant Part. 2 For additional voltage options, contact your local Analog Devices, Inc., sales or distribution representative. ...
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... ADP172 NOTES Rev Page ...
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... NOTES Rev Page ADP172 ...
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... ADP172 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06111-0-4/10(A) Rev Page ...