ADP225 Analog Devices, ADP225 Datasheet
ADP225
Related parts for ADP225
ADP225 Summary of contents
Page 1
... ADP223, respectively, but with the addition of a quick output discharge (QOD) feature. The ADP222/ADP223/ADP224/ADP225 extend the battery life small 8-lead × LFCSP package and are stable with tiny 1 µF, ±30% ceramic output capacitors, resulting in the smallest possible board area for a wide variety of portable power needs. ...
Page 2
... Current Limit and Thermal Overload Protection ................. 20 Thermal Considerations ............................................................ 20 Printed Circuit Board Layout Considerations........................ 22 Outline Dimensions ....................................................................... 23 Ordering Guide .......................................................................... 23 7/11—Rev Rev. A Added ADP222, ADP224, and ADP225 ......................... Universal Changes to Features Section, Applications Section, General Description Section, and Figure 2 .................................... 1 Changes to Table 1 ............................................................................. 3 Added Figure 4; Renumbered Sequentially ................................... 6 Changes to Table 5 ............................................................................. 6 Changes to Typical Performance Characteristics Section ...
Page 3
... IN 2.5 V ≤ V ≤ 5 EN1 = EN2 = V or GND I-LEAKAGE IN EN1 = EN2 = V or GND RISE FALL HYS V = 2.8 V OUT QOD Rev Page ADP222/ADP223/ADP224/ADP225 = 10 mA µF, T OUT2 IN OUT1 OUT2 Min Typ 2.5 65 100 300 0.2 − 5.5 V −2 OUT 0.495 0.500 + 0 ...
Page 4
... ADP222/ADP223/ADP224/ADP225 Parameter Symbol OUTPUT NOISE OUT POWER SUPPLY REJECTION RATIO PSRR 1 Accuracy when VOUTx is connected directly to ADJx or SENSEx. When the VOUTx voltage is set by external feedback resistors, the absolute accuracy in adjust mode depends on the tolerances of resistors used. 2 Based on an end-point calculation using 1 mA and 300 mA loads. ...
Page 5
... Table 4. Thermal Resistance J ) Package Type D 8-Lead 2 mm × LFCSP ESD CAUTION Rev Page ADP222/ADP223/ADP224/ADP225 ) of the package is JA AN-772 of the package is based on modeling and JB measures the component power flowing JB . Therefore, Ψ thermal paths include ...
Page 6
... Adjust Pin for VOUT1. A resistor divider from VOUT1 to ADJ1 sets the output voltage. SENSE1 Sense Pin for VOUT1. EPAD The exposed paddle must be connected to ground. Rev Page Data Sheet ADP223/ ADP225 1 8 EN1 ADJ1 2 7 EN2 VOUT1 3 6 GND VIN 4 ADJ2 VOUT2 5 NOTES 1. CONNECT EXPOSED PAD TO GND. Figure 4. ADP223/ADP225 Pin Configuration ...
Page 7
... V, OUTx 85 125 = 2.8 V, Figure 9. Output Voltage vs. Load Current, V OUTx 85 125 = 1.8 V, Figure 10. Output Voltage vs. Load Current, V OUTx Rev Page ADP222/ADP223/ADP224/ADP225 = 25°C, unless otherwise noted. A 1.220 1.215 1.210 1.205 1.200 1.195 LOAD = 10µA LOAD = 100µA 1.190 LOAD = 1mA LOAD = 10mA 1.185 ...
Page 8
... ADP222/ADP223/ADP224/ADP225 1.820 1.815 1.810 1.805 1.800 1.795 1.790 1.785 1.780 0.01 0 (mA) LOAD Figure 11. Output Voltage vs. Load Current, V OUTx 1.220 1.215 1.210 1.205 1.200 1.195 1.190 1.185 1.180 0.01 0 (mA) LOAD Figure 12. Output Voltage vs. Load Current, V OUTx 3.40 3.38 3.36 3.34 3.32 3.30 3.28 LOAD = 10µA 3.26 LOAD = 100µA LOAD = 1mA 3 ...
Page 9
... Figure 21. Ground Current vs. Input Voltage, V 250 200 150 100 50 0 100 1000 2.30 ADP222/ADP224 Figure 22. Ground Current vs. Input Voltage, V Rev Page ADP222/ADP223/ADP224/ADP225 0 100 I (mA) LOAD ADP222/ADP224 LOAD = 10µA LOAD = 10mA LOAD = 100µA LOAD = 100mA LOAD = 1mA LOAD = 300mA 2 ...
Page 10
... Rev Page Data Sheet LOAD = 100µA LOAD = 1mA LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 300mA –40 – JUNCTION TEMPERATURE (°C) ADP223/ADP225 0 100 I (mA) LOAD = 3.3 V, OUTx 0.01 0 100 I (mA) LOAD = 2.8 V, OUTx 125 = 1.2 V, OUTx 1000 ADP223/ADP225 1000 ADP223/ADP225 ...
Page 11
... LOAD = 100µA LOAD = 1mA LOAD = 10mA LOAD = 50mA LOAD = 200mA LOAD = 300mA 5.10 5.30 5.50 ADP223/ADP225 LOAD = 100µA LOAD = 1mA LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 300mA 5.10 5.50 ADP223/ADP225 LOAD = 100µA LOAD = 1mA LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 300mA 5.10 5.50 ADP223/ADP225 ...
Page 12
... LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 300mA 0 2.3 2.7 3.1 3.5 3.9 4.3 4 1.2 V, Single Output, OUTx Includes 100 µA for Output Divider, ADP223/ADP225 450 400 350 300 250 200 150 LOAD = 100µA 100 LOAD = 1mA LOAD = 10mA LOAD = 50mA 50 LOAD = 200mA LOAD = 300mA 0 2.3 2 ...
Page 13
... Figure 45. Ground Current vs. Input Voltage in Dropout 2.8 V OUT LOAD = 1mA LOAD = 5mA LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 300mA 3.5 3.6 Figure 46. Ground Current vs. Input Voltage in Dropout 3.3 V OUTx Rev Page ADP222/ADP223/ADP224/ADP225 2.90 2.85 2.80 2.75 2.70 2.65 2.60 2.55 LOAD = 1mA LOAD = 5mA 2.50 LOAD = 10mA LOAD = 50mA 2.45 LOAD = 100mA LOAD = 300mA 2 ...
Page 14
... ADP222/ADP223/ADP224/ADP225 50mV RIPPLE V = 4.3V – 3.3V OUT C = 1µF OUT –20 –30 –40 –50 –60 –70 –80 –90 –100 10 100 1k 10k FREQUENCY (Hz) Figure 47. Power Supply Rejection Ratio vs. Frequency 4. 3 OUTx 50mV RIPPLE V = 3.8V – 2.8V OUT C = 1µF OUT –20 – ...
Page 15
... Figure 56. Transient Line Response CH4 200mV 10.40 Figure 57. Transient Line Response CH4 200mV 9. Figure 58. Transient Load Response Rev Page ADP222/ADP223/ADP224/ADP225 OUT1 2 V OUT2 3 1 CH1 1V B CH2 10mV B M1µs A CH4 W ...
Page 16
... ADP222/ADP223/ADP224/ADP225 LOAD CURRENT ON V OUT1 OUT1 V OUT2 3 CH1 200mA Ω B CH2 50mV B M10µs A CH1 CH3 10.0mV T W Figure 59. Transient Load Response 1 OUTx OUTx LOAD 0.001 0.01 0 (mA) LOAD Figure 60. RMS Output Noise vs. Load Current and Output Voltage, ...
Page 17
... If the feedback voltage is higher than the reference voltage, the gate of the PMOS device is pulled higher, allowing less current to flow and decreasing the output voltage. VOUT1 140Ω ADP225 ONLY The ADP223/ADP225 140Ω ADP224 disconnected and the feedback input of the error amplifiers is VOUT2 brought out for each output ...
Page 18
... Therefore, the capacitor chosen in this example meets the minimum capacitance requirement of the LDO over temperature and tolerance at the chosen output voltage. To guarantee the performance of the ADP222/ADP223/ ADP224/ADP225 imperative that the effects of dc bias, temperature, and tolerances on the behavior of the capacitors be evaluated for each application. Rev Page ...
Page 19
... Rev Page ADP222/ADP223/ADP224/ADP225 3.5 ENx 3.3V 2.8V 3.0 1.8V 1.2V 2.5 2.0 1.5 1.0 0 100 200 300 400 500 600 700 TIME (µs) Figure 69. Typical Start-Up Time ADP225 use a single band gap to generate the / 1µ EN1 ADJ1 EN2 VOUT1 3 6 GND VIN VOUT2 = 2.8V 4 ADJ2 ...
Page 20
... Equation 2. are protected against To guarantee reliable operation, the junction temperature of the ADP222/ADP223/ADP224/ADP225 125°C. To ensure that the junction temperature stays below this maximum value, the user must be aware of the parameters that contribute to junction temperature changes. These parameters include ambient temperature, power dissipation in the power device, and thermal resistances between the junction and ambient air (θ ...
Page 21
... A In the case where the board temperature is known, use the thermal characterization parameter, Ψ junction temperature rise (see Figure 75). Maximum junction temperature (T and power dissipation (P T The typical value of Ψ Rev Page ADP222/ADP223/ADP224/ADP225 140 120 100 ...
Page 22
... PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS Heat dissipation from the package can be improved by increasing the amount of copper attached to the pins of the ADP222/ADP223/ADP224/ADP225. However, as listed in 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. ...
Page 23
... Package [LFCSP_UD] 3.3 2.8 8-Lead Lead Frame Chip Scale Package [LFCSP_UD] 3.3 3.0 8-Lead Lead Frame Chip Scale Package [LFCSP_UD] 2.8 1.8 8-Lead Lead Frame Chip Scale Package [LFCSP_UD] Adjustable Adjustable 8-Lead Lead Frame Chip Scale Package [LFCSP_UD] Rev Page ADP222/ADP223/ADP224/ADP225 0.50 BSC 8 0.175 REF 1.10 1.00 0.90 1 Package Option CP-8-10 CP-8-10 CP-8-10 CP-8-10 CP-8-10 CP-8-10 CP-8-10 CP-8-10 CP-8-10 ...
Page 24
... ADP222/ADP223/ADP224/ADP225 Model 1 Temperature Range ADP223ACPZ-R7 −40°C to +125°C ADP223CP-EVALZ ADP225CP-EVALZ RoHS Compliant Part. ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Output Voltage (V) VOUT1 VOUT2 Package Description Adjustable Adjustable 8-Lead Lead Frame Chip Scale ...