AME, Inc. 1.55A CMOS LDO AME8826 ! General Description The AME8826 family of positive, linear regulators feature low quiescent current (45µA typ.) with low dropout voltage, making them ideal for battery applications. ! Functional Block Diagram (Fixed Versions) IN 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. OUT Overcurrent Shutdown Thermal Shutdown R1 BYPASS AMP EN In applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and Ground. ! Features " " " " " " " " " " " " Very Low Dropout Voltage Guaranteed 1.55A Output Accurate to within 1.5% 45µA Quiescent Current Typically Over-Temperature Shutdown Current Limiting Noise Reduction Bypass Capacitor (Fixed Versions) Power-Saving Shutdown Mode Space-Saving DDPAK-5, SO-8 Package 6 Factory Pre-set Output Voltages Low Temperature Coefficient Adjustable Version GND ! Functional Block Diagram (Adjustable Version) IN OUT Overcurrent Shutdown Thermal Shutdown EN (external) ADJ 1.242V R2 (external) GND ! Typical Application IN OUT OUT AME8826 ! Applications Instrumentation Portable Electronics Wireless Devices PC Peripherals Battery Powered Widgets R1 AMP IN " " " " " R2 1.242V The AME8826 is stable with an output capacitance of 4.7µF or greater. BYP C1 µF 5V 1µ GND EN C2 C3 1nF 4.7µ µF 1 AME, Inc. AME8826 1.55A CMOS LDO ! Pin Configuration TO-263(DDPAK-5) Top View AME8826 1 2 3 4 5 TO-263(DDPAK-5) Top View AME 8826AEDVxxx 1. EN 2. VIN 3. GND 4. VOUT 5. BYP AME8826 1 SO-8 Top View 8 7 6 2 3 5 4 AME 8826AEHAxxx 1. BYP 2. GND 3. GND 4. EN 5. VIN 6. GND 7. GND 8. VOUT SO-8 Top View 8 7 6 5 AME8826 1 2 2 3 3 4 5 SO-8 Top View AME8826 1 2 AME8826BEDVADJ 1. EN 2. VIN 3. GND 4. VOUT 5. ADJ 4 AME 8826CEHAADJ 1. EN 2. VIN 3. VOUT 4. ADJ 5. GND 6. GND 7. GND 8. GND 8 7 6 5 AME8826 1 2 3 4 AME 8826BEHAADJ 1. ADJ 2. GND 3. GND 4. EN 5. VIN 6. GND 7. GND 8. VOUT AME, Inc. 1.55A CMOS LDO AME8826 ! Ordering Information Part Number Marking Output Voltage Package Operating Temp. Range AME8826AEDV150 AME8826 AEDV150 yyww 1.50 DDPAK-5 - 40oC to + 85oC AME8826AEDV180 AME8826 AEDV180 yyww 1.80 DDPAK-5 - 40oC to + 85oC AME8826AEDV250 AME8826 AEDV250 yyww 2.50 DDPAK-5 - 40oC to + 85oC AME8826AEDV330 AME8826 AEDV330 yyww 3.30 DDPAK-5 - 40oC to + 85oC AME8826AEDV475 AME8826 AEDV475 yyww 4.75 DDPAK-5 - 40oC to + 85oC AME8826AEDV500 AME8826 AEDV500 yyww 5.00 DDPAK-5 - 40oC to + 85oC AME8826BEDVADJ AME8826 BEDVADJ yyww ADJ DDPAK-5 - 40oC to + 85oC AME8826AEHA150 AME8826 AEHA150 yyww 1.50 SO-8 - 40oC to + 85oC AME8826AEHA180 AME8826 AEHA180 yyww 1.80 SO-8 - 40oC to + 85oC AME8826AEHA250 AME8826 AEHA250 yyww 2.50 SO-8 - 40oC to + 85oC AME8826AEHA330 AME8826 AEHA330 yyww 3.30 SO-8 - 40oC to + 85oC AME8826AEHA475 AME8826 AEHA475 yyww 4.75 SO-8 - 40oC to + 85oC 3 AME, Inc. AME8826 1.55A CMOS LDO ! Ordering Information (contd.) Part Number Marking Output Voltage Package Operating Temp. Range AME8826AEHA500 AME8826 AEHA500 yyww 5.00 SO-8 - 40oC to + 85oC AME8826BEHAADJ AME8826 BEHAADJ yyww ADJ SO-8 - 40oC to + 85oC AME8826CEHAADJ AME8826 CEHAADJ yyww ADJ SO-8 - 40oC to + 85oC Please consult AME sales office or authorized Rep./Distributor for other output voltage and package type availability. 4 AME, Inc. 1.55A CMOS LDO AME8826 ! Absolute Maximum Ratings Parameter Maximum Unit 8 V Output Current PD / (VIN - VO) mA Output Voltage GND - 0.3 to VIN + 0.3 V Input Voltage ESD Classification B Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device ! Recommended Operating Conditions Parameter Rating Ambient Temperature Range Junction Temperature Unit - 40 to + 85 o C - 40 to + 125 o C ! Thermal Information Parameter Thermal Resistance (θjc ) Internal Power Dissipation (PD ) (∆ T = 100oC)* Maximum TO-263 (DDPAK-5) 5 SO-8 20** TO-263 (DDPAK-5) 3.00 SO-8 2.5 Unit o C/W W Maximum Junction Temperature 150 o Maximum Lead Temperature (10 Sec) 300 o C C * Assuming a heat sink capable of twice times (θjc) ** Estimated 5 AME, Inc. AME8826 1.55A CMOS LDO ! Electrical Specifications TA = 25OC unless otherwise noted Parameter Input Voltage VIN Output Voltage Accuracy VO Dropout Voltage VDROPOUT Min IO=1mA VO=VO(NOM) -2.0% Units Note 1 7 V -1.5 1.5 % 1.5V<=VO(NOM)<=2.0V IO=1.55A Typ Max See chart 2.0V<VO(NOM)<=2.8V 2.8V<VO(NOM)<3.8V 1000 800 mV 600 Output Current IO VO>1.2V 1550 mA Current Limit ILIM VO>1.2V 1550 2000 mA IQ IO=0mA 45 IGND IO=1mA to 1.5A 45 Quiescent Current (For Fixed Output Voltage Options) Ground Pin Current Line Regulation REGLINE Load Regulation REGLOAD Over Temerature Shutdown IO=1mA VO < 2.0V VIN=VO+1 to VO+2 VO >= 2.0V IO=1mA to 1.5A OTS 70 µA µA 0.15 % 0.02 0.1 % 0.2 1 % 150 o o C Over Temerature Hysterisis OTH 30 VO Temperature Coefficient TC 30 ppm/oC ADJ Input Bias Current IADJ 1 µA ADJ Reference Voltage VREF 1.223 1.242 1.261 V Power Supply Rejection Power Supply Rejection PSRR PSRR Output Voltage Noise eN Output Voltage Noise eN EN Input Threshold EN Input Bias Current Shutdown Supply Current Note1:VIN(min)=VOUT+VDROPOUT 6 Test Condition Symbol C f=1kHz 50 f=10kHz 20 f=100kHz 15 IO=100mA f=1kHz 75 CO=4.7µF ceramic f=10kHz 55 CBYP=0.01µF f=10Hz to 100kHz IO=10mA,CBYP=0µF f=100kHz 30 Co=4.7µF 30 µVrms Co=4.7µF 30 µVrms IO=100mA CO=4.7µF ceramic f=10Hz to 100kHz IO=10mA,CBYP=0.01µF dB dB VEH VIN=2.7V to 7V 2.0 VIN V VEL VIN=2.7V to 7V 0 0.4 V IEH VEN=VIN, VIN=2.7V to 7V 0.1 µA IEL VEN=0V, VIN=2.7V to 7V 0.5 µA ISD VIN=5.0V, VO=0V, VEN<VEL 30 VIN=2.5V, VO=0V, VEN<VEL 0.5 µA 2 µA AME, Inc. 1.55A CMOS LDO AME8826 ! Detailed Description ! Enable The AME8826 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown. 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 1µA. This pin behaves much like an electronic switch. 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. ! External Capacitors The AME8826 is stable with an output capacitor to ground of 4.7µF 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 0.1µF ceramic capacitor with a 10µF Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. ! 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: 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 10s of kΩ will produce adequate stability, given reasonable layout precautions. To improve stability characteristics, keep parasitics on the ADJ pin to a minimum, and lower R1 and R2 values. A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be at least 0.1µF 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 ~ 0.01µF. 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. 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. 7 AME, Inc. AME8826 1.55A CMOS LDO Dropout Voltage VS ILOAD 1.2 0.8 Dropout Voltage (V) Dropout Voltage (V) ILOAD=1.5A VOUT=1.5 1 1.8 0.8 2.0 0.6 2.1 0.4 2.8 0.2 3.3 0 Dropout Voltage VS VOUT 1 0.6 ILOAD=0.5A 0.2 0 0 0.3 0.6 0.9 1.2 1.5 ILOAD=1.0A 0.4 1.8 0 2 4 ILOAD (A) Quiescent Current vs. Temperature Ground Current (µ µ A) Quiescent Current @ 5V (uA) 45 39 37 35 33 31 29 40 35 IOUT = 140mA VOUT = 1.5V 30 25 20 15 27 10 -45 -5 25 55 85 2 115 3 4 Temperature ( C) Ground Current vs. Load Current 7 8 3 2.8 38 CIN = 4.7µF COUT = 4.7µF VOUT = 1.8V 2.6 37.5 Current Limit (A) Ground Current (µ µ A) 6 Current Limit vs. VIN 38.5 VIN = 2.5V VOUT = 1.5V 37 36.5 36 35.5 2.4 2.2 2 1.8 1.6 1.4 35 34.5 5 VIN (V) o 1.2 0 0.25 0.5 0.75 1 Load Current (mA) 8 8 Ground Current vs. VIN 50 41 25 6 VOUT (V) 1.25 1.5 1 2 3 4 5 VIN (V) 6 7 8 AME, Inc. 1.55A CMOS LDO AME8826 Load Regulation vs. Temperature Dropout Voltage vs. Load Current(2.5V) 400 Dropout Voltage @1.5A (mV) 0.30 Load Regulation (%) 0.25 0.20 0.15 0.10 0.05 0.00 -45 -5 25 55 85 115 o C 85 oC 55 oC 350 300 25 oC 250 -5 oC -45 oC 200 150 100 50 0 115 0.3 0.6 0.9 1.2 1.5 Load Current (A) Temperature (oC) Line Transient Response AME8826CEHAADJ vs. Temperature 1.244 VOUT (50mV/DIV) 1.243 VADJ (V) 1.242 1.241 1.240 1.239 VIN (2V/DIV) 1.238 1.237 1.236 1.235 -45 -5 25 55 85 Time (20mS/DIV) Current Limit Response VIN = 5V CIN = 4.7µF COUT = 4.7µF VOUT 1V/DIV 0A 0V ILOAD 1A/DIV VOUT 10mV/DIV ILoad 1A/DIV Load Step 40mA to 1.5A Time 500µ µ S/DIV 0V 115 Temperature (oC) CIN = 4.7µF COUT = 4.7µF VIN = 4.0V VOUT = 1.8V CIN = 4.7µF COUT = 4.7µF TR = TF = 1µS VOUT = 1.5V ILIM ISC 0A Time 1mS/DIV 9 AME, Inc. AME8826 1.55A CMOS LDO Overtemperature Shutdown Stability vs. ESR vs. ILoad 10000 IOUT 1A/DIV Unstable Region 1000 CLESR (Ω Ω) VOUT 1V/DIV VIN = 4V CIN = 4.7µF COUT = 4.7µF CL=5µF 100 0A 10 1 Stable Region 0.1 0V 0.01 Untested Region 0 250 500 750 Stability vs. ESR vs. ILoad Stability vs. ESR vs. ILoad Unstable Region 1000 CLESR (Ω Ω) CLESR (Ω Ω) 10 1 Unstable Region 100 CL=2µF 100 Stable Region 0.1 CL=10µF 10 1 Stable Region 0.1 0.01 Untested Region 250 500 750 1000 ILOAD (mA) 10 1500 10000 1000 0.01 0 1250 ILOAD (mA) Time 100mS/DIV 10000 1000 1250 1500 0.001 0 Untested Region 250 500 750 1000 ILOAD (mA) 1250 1500 AME, Inc. 1.55A CMOS LDO AME8826 ! External Resistor Divider Table R1 (K Ohm) 1 2 10 20 50 100 200 500 1000 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 R2(kohm)=(1.242*R1(kohm))/(Vout-1.242) 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 5 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 1.34 107.07 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 6.68 428.28 230.00 157.22 119.42 96.28 80.65 69.39 60.88 54.24 48.90 44.52 40.86 37.75 35.08 32.77 30.74 28.95 27.36 25.93 24.64 23.48 22.42 21.45 20.56 19.75 18.99 18.29 17.64 17.04 16.47 15.94 15.45 14.98 14.54 14.13 13.74 13.37 1070.69 575.00 393.04 298.56 240.70 201.62 173.46 152.21 135.59 122.24 111.29 102.14 94.38 87.71 81.93 76.86 72.38 68.39 64.82 61.61 58.70 56.05 53.63 51.41 49.36 47.48 45.73 44.11 42.59 41.18 39.86 38.62 37.45 36.36 35.32 34.35 33.42 597.55 481.68 403.44 347.07 304.52 271.27 244.56 222.64 204.33 188.80 175.46 163.88 153.74 144.78 136.81 129.67 123.23 117.41 112.11 107.27 102.83 98.74 94.97 91.47 88.22 85.19 82.37 79.73 77.25 74.92 72.72 70.65 68.70 66.85 11 AME, Inc. AME8826 1.55A CMOS LDO ! External Resistor Divider Table (contd.) R1 (K Ohm) 1 2 5 20 50 100 200 500 1000 130.19 126.86 123.71 120.70 117.84 115.11 112.50 110.01 107.63 105.34 103.16 101.06 99.04 97.11 95.25 93.45 91.73 90.07 88.46 86.91 85.42 83.98 82.58 81.23 79.92 78.66 77.43 76.24 75.09 73.97 72.89 71.83 70.81 69.81 68.85 67.91 66.99 66.10 325.47 317.16 309.26 301.75 294.59 287.77 281.25 275.02 269.06 263.36 257.89 252.64 247.61 242.77 238.11 233.63 229.32 225.16 221.15 217.28 213.55 209.94 206.45 203.07 199.81 196.64 193.58 190.61 187.73 184.93 182.22 179.58 177.02 174.54 172.12 169.76 167.48 165.25 650.94 634.32 618.53 603.50 589.18 575.53 562.50 550.04 538.13 526.72 515.78 505.29 495.22 485.54 476.23 467.27 458.64 450.33 442.31 434.57 427.10 419.88 412.90 406.15 399.61 393.29 387.16 381.22 375.45 369.86 364.44 359.17 354.05 349.07 344.24 339.53 334.95 330.49 R2(kohm)=(1.242*R1(kohm))/(Vout-1.242) 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 10 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 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 3.25 3.17 3.09 3.02 2.95 2.88 2.81 2.75 2.69 2.63 2.58 2.53 2.48 2.43 2.38 2.34 2.29 2.25 2.21 2.17 2.14 2.10 2.06 2.03 2.00 1.97 1.94 1.91 1.88 1.85 1.82 1.80 1.77 1.75 1.72 1.70 1.67 1.65 6.51 6.34 6.19 6.03 5.89 5.76 5.63 5.50 5.38 5.27 5.16 5.05 4.95 4.86 4.76 4.67 4.59 4.50 4.42 4.35 4.27 4.20 4.13 4.06 4.00 3.93 3.87 3.81 3.75 3.70 3.64 3.59 3.54 3.49 3.44 3.40 3.35 3.30 13.02 12.69 12.37 12.07 11.78 11.51 11.25 11.00 10.76 10.53 10.32 10.11 9.90 9.71 9.52 9.35 9.17 9.01 8.85 8.69 8.54 8.40 8.26 8.12 7.99 7.87 7.74 7.62 7.51 7.40 7.29 7.18 7.08 6.98 6.88 6.79 6.70 6.61 32.55 31.72 30.93 30.17 29.46 28.78 28.13 27.50 26.91 26.34 25.79 25.26 24.76 24.28 23.81 23.36 22.93 22.52 22.12 21.73 21.35 20.99 20.64 20.31 19.98 19.66 19.36 19.06 18.77 18.49 18.22 17.96 17.70 17.45 17.21 16.98 16.75 16.52 65.09 63.43 61.85 60.35 58.92 57.55 56.25 55.00 53.81 52.67 51.58 50.53 49.52 48.55 47.62 46.73 45.86 45.03 44.23 43.46 42.71 41.99 41.29 40.61 39.96 39.33 38.72 38.12 37.55 36.99 36.44 35.92 35.40 34.91 34.42 33.95 33.50 33.05 Note: Small load(greater than 2 mA) is necessary as R1 or R2 is larger than 50 K Ohm. Otherwise, outputvoltage probably cannot be pulled down to 0 V on disable mode. 12 AME, Inc. 1.55A CMOS LDO AME8826 ! Package Dimension SO-8 Top View SYMBOLS Side View C D L ? MIN MAX A 1.35 1.75 0.05315 0.0689 A 0.10 0.25 0.00394 0.00984 1.473 REF B 0.33 0.51 0.01299 0.02008 C 0.19 0.25 0.00748 0.00984 D 4.80 5.00 0.18898 0.19685 E 3.80 4.00 0.14961 0.15748 1.27 BSC 0.050 BSC L 0.40 1.27 0.01575 0.05 y - 0.10 - 0.004 è A 0.058 REF 0 o 8 o 0 o 8o A1 A2 7o(4X) e MAX e Front View INCHES MIN A2 E MILLIMETERS B TO-263-5 Top View SYMBOLS Side View A B K E H P W D G Front View N R A B C D E G H K L N P R W MILLIMETERS INCHES MIN MAX MIN MAX 10.050 10.668 0.396 0.420 8.280 9.169 0.326 0.361 4.310 4.597 0.170 0.181 0.660 0.910 0.026 0.036 1.140 1.400 0.045 0.055 1.70REF 0.067 REF 14.605 15.875 0.575 0.625 1.143 1.680 0.045 0.066 0.000 0.305 0.000 0.012 0.330 0.580 0.013 0.023 2.280 2.800 0.090 0.110 0o 8o 0.25REF 0o 8o 0.01REF C 13 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. AME, Inc. , September 2003 Document: 2006-DS8803/8814-G E-Mail:[email protected] Address:Room 2101, No.2 Building Yulan garden, No.50 Puhuitang Rd,Shanghai,PRC zip:200030 Tel : 86-21-64285731/32 ext:8033 Fax: 86-21-64393342 Sales Manager:Longman Xu