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AME, Inc.
AME8816
1.5A CMOS LDO
n General Description
The AME8816 family of positive, linear regulators feature low quiescent current (45A typ.) with low dropout voltage, making them ideal for battery applications. Output voltages are set at the factory and trimmed to 1.5% accuracy. These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the "Worst" of operating conditions. In applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and Ground. The AME8816 is stable with an output capacitance of 4.7F or greater.
n Functional Block Diagram
(Fixed Versions)
IN OUT
Overcurrent Shutdown
Thermal Shutdown
R1 BYPASS AMP EN
1.242V
R2 GND
n Features
Very Low Dropout Voltage l Guaranteed 1.5A Output l Accurate to within 1.5% l 45A Quiescent Current Typically l Over-Temperature Shutdown l Current Limiting l Short Circuit Current Fold-back l Noise Reduction Bypass Capacitor (Fixed Versions) l Power-Saving Shutdown Mode l Space-Saving DDPAK-5 Package l 6 Factory Pre-set Output Voltages l Low Temperature Coefficient l Adjustable Version
l
n Functional Block Diagram
(Adjustable Version)
IN OUT
Overcurrent Shutdown
Thermal Shutdown
R1 AMP EN ADJ 1.242V R2
(external) (external)
GND
n Typical Application n Applications
l l l l l
IN
OUT
IN BYP GND OUT
AME8816
Instrumentation Portable Electronics Wireless Devices PC Peripherals Battery Powered Widgets
EN
C1 5V
C2
C3
1 F
1nF
4.7 F
1
AME, Inc.
AME8816
1.5A CMOS LDO
n Pin Configuration
TO-263(DDPAK-5) Top View
AME8816 AEDVXXX YYWW
1
2
3
4
5
1. 2. 3. 4. 5.
EN VIN GND VOUT BYP
AME8816 BEDVADJ YYWW
1
2
3
4
5
1. 2. 3. 4. 5.
EN VIN GND VOUT ADJ
SO-8 Top View
1. 2. 3. 4. 5. 6. 7. 8. BYP GND GND EN VIN GND GND VOUT 1. 2. 3. 4. 5. 6. 7. 8. ADJ GND GND EN VIN GND GND VOUT
O
1 2 3 4
1 2 3 4
8816 AEHAXXX YYWW
7 6 5
8816 BEHAADJ YYWW
O
8
8 7 6 5
1 2 3 4
8816 CEHAADJ YYWW
O
8 7 6 5
1. 2. 3. 4. 5. 6. 7. 8.
EN VIN VOUT ADJ GND GND GND GND
2
AME, Inc.
AME8816
1.5A CMOS LDO
n AME8816 Ordering Information
VOUT
1.50 1.80 2.50 3.30 4.75 5.00 ADJ ADJ availability.
Package Type DDPAK-5
AME8816AEDV150 AME8816AEDV180 AME8816AEDV250 AME8816AEDV330 AME8816AEDV475 AME8816AEDV500 AME8816BEDVADJ
SO-8
AME8816AEHA150 AME8816AEHA180 AME8816AEHA250 AME8816AEHA330 AME8816AEHA475 AME8816AEHA500 AME8816BEHAADJ AME8816CEHAADJ
Please consult AME sales office or authorized Rep./Distr. For other output voltage and package type or pinout
3
AME, Inc.
AME8816
1.5A CMOS LDO
n Absolute M aximum Ratings:
Parameter Input Voltage Output Current Output Voltage ESD Classification Maximum 8 Unit V mA V
P D / (V IN - V O)
GND - 0.3 to V IN + 0.3 B
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device.
n Recommended operating Conditions:
Parameter Ambient Temperature Range Junction Temperature Rating -40 to +85 -40 to +125 Unit
o
C C
o
n T hermal Information
Parameter TO-263 (DDPAK-5) Thermal Resistance (jc ) SO-8 Maximum 5 20**
o
Unit
C/W
TO-263 (DDPAK-5) Internal Power Dissipation (P D ) ( T = 100oC)* SO-8
3.00 2.50 W
Maximum Junction Temperature Maximum Lead Temperature ( 10 Sec) * Assuming a heat sink capable of twice times (jc ) ** Estimated
150 300
o
C C
o
4
AME, Inc.
AME8816
1.5A CMOS LDO
n Electrical Specifications
V IN = V O(nom) + 2V , V EN = V IN , T A = 25 o C unles s otherwis e noted
P a ra m e te r Input V oltage O utput V oltage A c c urac y S ym b ol V IN VO V EN = V EH m in, IO = 1m A IO = 1.5A V O = V O N O M -2.0% 1.5V < V O (N O M)< = 2.0V 2.0V < V O (N O M)< = 2.8V 2.8V < V O (N O M) O utput Current Current Lim it S hort Circ uit Current Q uies c ent Current M inim un Load Current (For A DJ Option) G round P in Current IO ILIM ISC IQ IMI N IG N D IO = 1m A to 1.5A IO = 1m A V IN = V O + 1 to V O + 2 V O < 2.0V 4.0 > V O > = 2.0V 4.0V < = V O Load Regulation O ver Tem erature S hutdown O ver Tem erature Hy s teris is V O Tem perature Coeffic ient A DJ Input B ias Current A DJ Referenc e V oltage RE G LO AD O TS O TH TC IAD J V R EF f= 1k Hz P ower S upply Rejec tion P S RR IO = 100m A C O = 4.7 F c eram ic IO = 100m A P ower S upply Rejec tion P S RR C O = 4.7 F c eram ic C BY P = 0.01 F O utput V oltage Nois e eN f= 10Hz to 100k Hz IO = 10m A ,C BY P = 0 F f= 10Hz to 100k Hz IO = 10m A ,C BY P = 0.01 F f= 10k Hz f= 100k Hz f= 1k Hz f= 10k Hz f= 100k Hz Co= 4.7 F Co= 4.7 F 2.0 0 V IN = 7V V EN = 0V , V IN = 7V V IN = 5V , V O = 0V , V EN = 0V 0.5 V IN = 5V , V AD J = 1.242V 1.223 IO = 1m A to 1.5A -0.15 -0.1 -0.4 -1 0.2 150 30 30 1 1.242 50 20 15 75 55 30 30 V rm s V rm s V in 0.4 0.1 0.5 2 V V A A A dB dB 1.261 0.02 V O > 1.2V V O > 1.2V V O < 0.4V IO = 0m A 1 45 0.15 0.1 0.4 1 1500 1500 2000 750 45 70 S ee c hart Te st Con dition M in Note 1 -1.5 Typ Max 7 1.5 1300 800 600 mA mA mA A mA A % % % %
o o
Un its V %
Dropout V oltage
V D R OPOU T
mV
Line Regulation
RE G LIN E
C C
ppm / o C A V
O utput V oltage Nois e
eN V EH V EL
30
E N Input Thres hold
E N Input B ias Current S hutdown S upply Current Note1.V IN (m in) = V O U T+ V D R OPOU T
IEH IEL ISD
Note2.V O(nom ) : nom inal output voltage of fix ed vers ion
5
AME, Inc.
AME8816
1.5A CMOS LDO
n Detailed Description
The AME8816 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown. The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds 140oC, or the current exceeds 2.2A. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC. The AME8816 behaves like a current source when the load reaches 2.2A. However, if the load impedance drops below 0.3 ohms, the current drops back to 600mA to prevent excessive power dissipation. Normal operation is restored when the load resistance exceeds 0.75 ohms. All capacitors should be placed in close proximity to the pins. A "Quiet" ground termination is desirable. This can be achieved with a "Star" connection.
n Enable
When pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1A. This pin behaves much like an electronic switch. 100Kohm resistor is necessary between VEN source and EN pin when VEN is higher than VIN. Note: There is no internal pull-up for EN PIN.
n Adjustable Version
The adjustable version uses external feedback resistors to generate an output voltage anywhere from 1.5V to 5.0V. Vadj is trimmed to 1.242V and VOUT is given by the equation:
n External Capacitors
The AME8816 is stable with an output capacitor to ground of 4.7F or greater. Ceramic capacitors have the lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1F ceramic capacitor with a 10F Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be at least 0.1F to have a beneficial effect. A third capacitor can be connected between the BYPASS pin and GND. This capacitor can be a low cost Polyester Film variety between the value of 0.001 ~ 0.01F. A larger capacitor improves the AC ripple rejection, but also makes the output come up slowly. This "Soft" turn-on is desirable in some applications to limit turn-on surges.
VOUT = Vadj ( 1 + R1 / R2 )
Feedback resistors R1 and R2 should be high enough to keep quiescent current low, but increasing R1 + R2 will reduce stability. In general, R1 and R2 in the 10's of k will produce adequate stability, given reasonable layout precautions. To improve stability characteristics, keep
6
AME, Inc.
AME8816
1.5A CMOS LDO
1.2 1 0.8 0.6 0.4 0.2 0 0
Dropout Voltage vs. I L O A D
V O U T= 1.5
1
Dropout Voltage vs. V OUT
I L O A D =1.5A
1.8 2.0 2.1 2.8 3.3
Dropout Voltage (V)
Dropout Voltage (V)
0.8 0.6
I L O A D =1.0A
0.4
I L O A D =0.5A
0.2 0 0 2 4 6 8
0.3
0.6
0.9
1.2
1.5
1.8
I LOAD (A)
V O U T (V)
Quiescent Current vs. Temperature
41
Ground Current vs. V IN
50 45
Quiescent Current @ 5V (uA)
Ground Current (A)
39 37 35 33 31 29 27 25 -45 -5 25 55
0
40 35 30 25 20 15 10 2 3 4 5 6 7 8
I O U T = 140mA V O U T = 1.5V
85
115
Temperature ( C)
V IN (V)
Ground Current vs. Load Current
38.5
Ground Current (A)
38 37.5 37 36.5 36 35.5 35 34.5 0 0.25 0.5 0.75 1 1.25 1.5
V IN = 2.5V V OUT = 1.5V
Load Current (mA)
7
AME, Inc.
AME8816
1.5A CMOS LDO
V OUT vs. Temperature (2.5V)
2.500
Load Regulation vs. Temperature
0.30
Output Voltage (V)
Load Regulation (%)
-5 25 55
0
2.495 2.490 2.485 2.480 2.475 -45
0.25 0.20 0.15 0.10 0.05 0.00 -45 -5
85
115
Temperature ( C)
Te mpe rature (0C)
25
55
85
115
Dropout Voltage vs. Load Current (2.5V)
400 350
AME8816BEHA VADJ vs Temperature
115 0 C 85 0 C 55 0 C 25 0 C -5 0 C -45 0 C
1.244 1.243 1.242
Dropout Voltage @ 1.5A (mV)
300 250 200 150 100 50 0 0.3 0.6 0.9 1.2 1.5
VADJ (V)
1.241 1.240 1.239 1.238 1.237 1.236 1.235 -45 -5 25 55 85 115
Load Current (A)
Temperature (0C)
8
AME, Inc.
AME8816
1.5A CMOS LDO
Transient Line Response
VOUT (50mV/DIV)
Load Step 40mA to 1.5A
VOUT 10mV/DIV ILOAD 1A/DIV
VIN (2V/DIV)
C IN = 4.7F C O U T = 4.7F T R = T F = 1S VOUT = 1.5V
0A C IN = 4.7F C O U T = 4.7F V IN = 4.0V V O U T = 1.8V
0V
Time (20S/DIV)
Time 500 S/DIV
Current Limit Response
VOUT 1V/DIV
V I N = 5V C I N = 4.7F C O U T = 4.7F
Current Limit Vs. V IN
3 2.8 2.6 2.4 2.2 2 1.8 1.6 1.4 1.2 1 2 3 4 5 6 7 8
C I N = 4.7F C O U T = 4.7F V O U T = 1.8V
0V IL I M IS C 0A
ILOAD 1A/DIV
Time 1mS/DIV
Current Limit (A)
V IN (V)
1.6
Short Circuit Current VS. V IN
C I N = 4.7F C O U T = 4.7F
Overtemperature Shutdown
IOUT 1A/DIV
Short Circuit Current (A)
1.4 1.2 1 0.8 0.6 0.4 0.2 0 2
0A V I N = 4V C I N = 4.7F C O U T = 4.7F
VOUT 1V/DIV
0V
3
4
5
6
7
8
V IN (V)
Time 100mS/DIV
9
AME, Inc.
AME8816
1.5A CMOS LDO
10000 1000
Stability vs. ESR vs I LOAD
10000
Unstable Region
Stability vs. ESR vs I LOAD
Unstable Region
1000
C L =5F
CLESR ()
100 10 1 0.1
100
C L =2 F
CLESR ()
10 1 0.1
Stable Region
Stable Region
0.01 0 250
Untested Region 500 750 1000 1250
0.01 1500 0 250 500
Untested Region
750
1000
1250
1500
ILOAD (mA)
ILOAD (mA)
10000 1000 100
Stability vs. ESR vs I L O A D
Unstable Region
CLESR ()
C L =10F
10 1
Stable Region
0.1
0.01
Untested Region
0.001 0 250 500 750 1000 1250 1500
ILOAD (mA)
10
AME, Inc.
AME8816
1.5A CMOS LDO
n External Resistor Divider Table
R1(kohm) Vout 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 2.65 2.70 2.75 2.80 2.85 2.90 2.95 3.00 3.05 3.10 1.00 2.00 5.00 10.00 20.00 50.00 100.00 200.00 R2(kohm)=(1.242*R1(kohm))/(Vout-1.242) 107.07 57.50 39.30 29.86 24.07 20.16 17.35 15.22 13.56 12.22 11.13 10.21 9.44 8.77 8.19 7.69 7.24 6.84 6.48 6.16 5.87 5.60 5.36 5.14 4.94 4.75 4.57 4.41 4.26 4.12 3.99 3.86 3.75 3.64 3.53 3.43 3.34 214.14 115.00 78.61 59.71 48.14 40.32 34.69 30.44 27.12 24.45 22.26 20.43 18.88 17.54 16.39 15.37 14.48 13.68 12.96 12.32 11.74 11.21 10.73 10.28 9.87 9.50 9.15 8.82 8.52 8.24 7.97 7.72 7.49 7.27 7.06 6.87 6.68 428.28 1070.69 230.00 575.00 157.22 393.04 119.42 298.56 597.55 96.28 240.70 481.68 80.65 201.62 403.44 69.39 173.46 347.07 60.88 152.21 304.52 54.24 135.59 271.27 48.90 122.24 244.56 44.52 111.29 222.64 40.86 102.14 204.33 37.75 94.38 188.80 35.08 87.71 175.46 32.77 81.93 163.88 30.74 76.86 153.74 28.95 72.38 144.78 27.36 68.39 136.81 25.93 64.82 129.67 24.64 61.61 123.23 23.48 58.70 117.41 22.42 56.05 112.11 21.45 53.63 107.27 20.56 51.41 102.83 19.75 49.36 98.74 18.99 47.48 94.97 18.29 45.73 91.47 17.64 44.11 88.22 17.04 42.59 85.19 16.47 41.18 82.37 15.94 39.86 79.73 15.45 38.62 77.25 14.98 37.45 74.92 14.54 36.36 72.72 14.13 35.32 70.65 13.74 34.35 68.70 13.37 33.42 66.85 500.00 1000.00
21.41 11.50 7.86 5.97 4.81 4.03 3.47 3.04 2.71 2.44 2.23 2.04 1.89 1.75 1.64 1.54 1.45 1.37 1.30 1.23 1.17 1.12 1.07 1.03 0.99 0.95 0.91 0.88 0.85 0.82 0.80 0.77 0.75 0.73 0.71 0.69 0.67
42.83 23.00 15.72 11.94 9.63 8.06 6.94 6.09 5.42 4.89 4.45 4.09 3.78 3.51 3.28 3.07 2.90 2.74 2.59 2.46 2.35 2.24 2.15 2.06 1.97 1.90 1.83 1.76 1.70 1.65 1.59 1.54 1.50 1.45 1.41 1.37 1.34
962.79 806.49 693.85 608.82 542.36 488.98 445.16 408.55 377.51 350.85 327.70 307.43 289.51 273.57 259.29 246.43 234.78 224.19 214.51 205.63 197.46 189.91 182.92 176.42 170.37 164.72 159.44 154.48 149.82 145.43 141.30 137.39 133.69
877.12 819.26 768.56 723.78 683.92 648.23 616.07 586.96 560.47 536.27 514.07 493.64 474.77 457.29 441.05 425.93 411.80 398.59 386.19 374.55 363.58 353.24 343.47 334.23
914.58 882.10 851.85 823.61 797.18 772.39 749.10 727.17 706.48 686.95 668.46
11
AME, Inc.
AME8816
1.5A CMOS LDO
n External Resistor Divider Table (contd.)
R1(kohm) Vout 3.15 3.20 3.25 3.30 3.35 3.40 3.45 3.50 3.55 3.60 3.65 3.70 3.75 3.80 3.85 3.90 3.95 4.00 4.05 4.10 4.15 4.20 4.25 4.30 4.35 4.40 4.45 4.50 4.55 4.60 4.65 4.70 4.75 4.80 4.85 4.90 4.95 5.00 1.00 0.65 0.63 0.62 0.60 0.59 0.58 0.56 0.55 0.54 0.53 0.52 0.51 0.50 0.49 0.48 0.47 0.46 0.45 0.44 0.43 0.43 0.42 0.41 0.41 0.40 0.39 0.39 0.38 0.38 0.37 0.36 0.36 0.35 0.35 0.34 0.34 0.33 0.33 2.00 1.30 1.27 1.24 1.21 1.18 1.15 1.13 1.10 1.08 1.05 1.03 1.01 0.99 0.97 0.95 0.93 0.92 0.90 0.88 0.87 0.85 0.84 0.83 0.81 0.80 0.79 0.77 0.76 0.75 0.74 0.73 0.72 0.71 0.70 0.69 0.68 0.67 0.66 5.00 10.00 20.00 50.00 100.00 200.00 R2(kohm)=(1.242*R1(kohm))/(Vout-1.242) 3.25 6.51 13.02 32.55 65.09 130.19 3.17 6.34 12.69 31.72 63.43 126.86 3.09 6.19 12.37 30.93 61.85 123.71 3.02 6.03 12.07 30.17 60.35 120.70 2.95 5.89 11.78 29.46 58.92 117.84 2.88 5.76 11.51 28.78 57.55 115.11 2.81 5.63 11.25 28.13 56.25 112.50 2.75 5.50 11.00 27.50 55.00 110.01 2.69 5.38 10.76 26.91 53.81 107.63 2.63 5.27 10.53 26.34 52.67 105.34 2.58 5.16 10.32 25.79 51.58 103.16 2.53 5.05 10.11 25.26 50.53 101.06 2.48 4.95 9.90 24.76 49.52 99.04 2.43 4.86 9.71 24.28 48.55 97.11 2.38 4.76 9.52 23.81 47.62 95.25 2.34 4.67 9.35 23.36 46.73 93.45 2.29 4.59 9.17 22.93 45.86 91.73 2.25 4.50 9.01 22.52 45.03 90.07 2.21 4.42 8.85 22.12 44.23 88.46 2.17 4.35 8.69 21.73 43.46 86.91 2.14 4.27 8.54 21.35 42.71 85.42 2.10 4.20 8.40 20.99 41.99 83.98 2.06 4.13 8.26 20.64 41.29 82.58 2.03 4.06 8.12 20.31 40.61 81.23 2.00 4.00 7.99 19.98 39.96 79.92 1.97 3.93 7.87 19.66 39.33 78.66 1.94 3.87 7.74 19.36 38.72 77.43 1.91 3.81 7.62 19.06 38.12 76.24 1.88 3.75 7.51 18.77 37.55 75.09 1.85 3.70 7.40 18.49 36.99 73.97 1.82 3.64 7.29 18.22 36.44 72.89 1.80 3.59 7.18 17.96 35.92 71.83 1.77 3.54 7.08 17.70 35.40 70.81 1.75 3.49 6.98 17.45 34.91 69.81 1.72 3.44 6.88 17.21 34.42 68.85 1.70 3.40 6.79 16.98 33.95 67.91 1.67 3.35 6.70 16.75 33.50 66.99 1.65 3.30 6.61 16.52 33.05 66.10 500.00 1000.00 325.47 317.16 309.26 301.75 294.59 287.77 281.25 275.02 269.06 263.36 257.89 252.64 247.61 242.77 238.11 233.63 229.32 225.16 221.15 217.28 213.55 209.94 206.45 203.07 199.81 196.64 193.58 190.61 187.73 184.93 182.22 179.58 177.02 174.54 172.12 169.76 167.48 165.25 650.94 634.32 618.53 603.50 589.18 575.53 562.50 550.04 538.13 526.72 515.78 505.29 495.22 485.54 476.23 467.27 458.64 450.33 442.31 434.57 427.10 419.88 412.90 406.15 399.61 393.29 387.16 381.22 375.45 369.86 364.44 359.17 354.05 349.07 344.24 339.53 334.95 330.49
Note: Small load(greater than 2 mA) is necessary as R1 or R2 is larger than 50 Kohm. Otherwise, output voltage probably cannot be pulled down to 0 V on disable mode.
12
AME, Inc.
AME8816
1.5A CMOS LDO
n Package Dimension
TO-263 (DDPAK-5)
Top View Side View
SYMBOLS A B C D E G H K L M N P 1.40 0.00 2.49 0.43 2.29 0o 2.41 0.25 MILLIMETERS MIN 10.05 8.28 4.31 0.66 1.14 1.70 ref 14.73 15.75 1.68 0.25 2.74 0.58 2.79 8o 2.67 MAX 10.31 8.53 4.57 0.91 1.40 MIN 0.396 0.326 0.170 0.026 0.045 0.580 0.000 0.055 0.000 0.098 0.017 0o 0.095 0.01 INCHES MAX 0.406 0.336 0.180 0.036 0.055 0.620 0.066 0.010 0.108 0.023 0.110 8o 0.105
0.067 ref
Front View
R S W
SO-8
Top View
SYMBOLS
MILLIMETERS MIN MAX 1.75 0.25 MIN
INCHES MAX 0.069 0.010
Side View
A A1 A2 B C
1.35 0.10
0.053 0.004
1.45 REF 0.33 0.19 4.80 3.80 0.51 0.25 5.00 4.00
0.057 REF 0.013 0.007 0.189 0.150 0.020 0.010 0.1970 0.157
D E
Front View
e H L y
1.27 BSC 5.80 0.40 0o 6.20 1.27 0.10 8o
0.050 BSC 0.228 0.016 0o 0.244 0.050 0.004 8o
13
www.ame.com.tw
E-Mail: info@ame.com.tw
Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. (c) AME, Inc. , January 2002 Document: 2013-DS8816-C
U.S. Headquarters
Analog Microelectronics, Inc.
3100 De La Cruz Blvd. Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489
Corporate Headquarters
AME, Inc.
2F, 189 Kang-Chien Road, Nei-Hu Dist. Taipei 114 Taiwan, R.O.C. Tel : 886 2 2627-8687 Fax : 886 2 2659-2989

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