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| AME, Inc. AME8845 3A CMOS LDO n General Description The AME8845 family of linear regulators feature low quiescent current (100A typ.) with low dropout voltage, making them ideal for battery applications. It is available in TO-252, SOT-223, TO-263 and TO-220 packages. The space-efficient TO-252, SOT-223 package is attractive for "Pocket" and "Hand Held" 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. The AME8845 is stable with an output capacitance of 2.2F or greater. n Functional Block Diagram IN Overcurrent Shutdown OUT Thermal Shutdown EN R1 AMP + R2 Vref n Features l Very Low Dropout Voltage l Guaranteed 3A Output l Accurate to within 1.5% l 100A Quiescent Current Typically l Over-Temperature Shutdown l Current Limiting l Short Circuit Current Fold-back l Space-Saving TO-252, SOT-223, TO-263 and TO-220 Package l Low Temperature Coefficient 0.1F VIN IN EN GND n Typical Application SENSE AME8845 OUT GND 2.2F n Applications l Instrumentation l Portable Electronics l Wireless Devices l PC Peripherals l Battery Powered Widgets 1 AME, Inc. AME8845 3A CMOS LDO n Pin Configuration TO-252-2 Top View AME 8845AECSxxx 1. VIN 2. GND (heat sink) 3. VOUT TO-252-2 Top View AME 8845BECSxxx 1. GND 2. VOUT (heat sink) 3. VIN AME8845 AME8845 1 2 3 1 2 3 SOT-223 Top View AME8845AEGTxxx 1. VIN 2. GND 3. VOUT SOT-223 Top View AME8845BEGTxxx 1. GND 2. VOUT 3. VIN AME8845 AME8845 1 2 3 1 2 3 TO-220 Top View AME 8845AEBTxxx 1. VIN TO-220 Top View AME 8845BEBTxxx 1. GND 2. VOUT (heat sink) 3. VIN AMExxxx AME8845 2. GND (heat sink) 3. VOUT AMExxxx AME8845 1 2 3 1 2 3 2 AME, Inc. AME8845 3A CMOS LDO n Pin Configuration TO-263-3L Top View AME 8845AEDTxxx 1. VIN TO-263-3L Top View AME 8845BEDTxxx 1. GND (heat sink) 2. VOUT 3. VIN AME8845 2. GND (heat sink) 3. VOUT AME8845 1 2 3 1 2 3 TO-263-5L Top View AME 8845AEDVxxx 1. VIN 2. EN 3. GND (heat sink) 4. SENSE 5. VOUT AME8845 1 2345 3 AME, Inc. AME8845 3A CMOS LDO n Ordering Information AME8845 x x x x xxx x Special Feature Voltage Number of Pin Package Operating Temperature Pin Configuration Pin Configuration Pin Configuration Operating Temperature Range E: -40OC to 85OC Package Type Number of Pins S: 2 T: 3 V: 5 Voltage Special Feature A: 1. VIN (TO-252) 2. GND 3. VOUT B: 1. GND 2. VOUT 3. VIN B: C: D: G: TO-220 TO-252 TO-263 SOT-223 150: 180: 250: 330: V=1.5V V=1.8V V=2.5V V=3.3V Z: Lead Free A: 1. VIN (TO-263-3) 2. GND 3. VOUT B: 1. GND 2. VOUT 3. VIN A: 1. VIN (TO-263-5) 2. EN 3. GND 4. SENSE 5. VOUT A: 1. VIN (TO-220) 2. GND 3. VOUT B: 1. GND 2. VOUT 3. VIN A: 1. VIN (SOT-223) 2. GND 3. VOUT B: 1. VIN (SOT-223) 2. GND 3. VOUT 4 AME, Inc. AME8845 3A CMOS LDO n Ordering Information Part Number AME8845AEBT150 Marking* AME8845 AEBT150 yyww AME8845 AEBT150 yyww AME8845 BEBT150 yyww AME8845 BEBT150 yyww AME8845 AEDT150 yyww AME8845 AEDT150 yyww AME8845 BEDT150 yyww AME8845 BEDT150 yyww AME8845 AEDV150 yyww AME8845 AEDV150 yyww AME8845 AEBT180 yyww AME8845 AEBT180 yyww AME8845 BEBT180 yyww Output Voltage 1.50 Package TO-220 Operating Temp. Range - 40oC to + 85oC AME8845AEBT150Z 1.50 TO-220 - 40oC to + 85oC AME8845BEBT150 1.50 TO-220 - 40oC to + 85oC AME8845BEBT150Z 1.50 TO-220 - 40oC to + 85oC AME8845AEDT150 1.50 TO-263-3 - 40oC to + 85oC AME8845AEDT150Z 1.50 TO-263-3 - 40oC to + 85oC AME8845BEDT150 1.50 TO-263-3 - 40oC to + 85oC AME8845BEDT150Z 1.50 TO-263-3 - 40oC to + 85oC AME8845AEDV150 1.50 TO-263-5 - 40oC to + 85oC AME8845AEDV150Z 1.50 TO-263-5 - 40oC to + 85oC AME8845AEBT180 1.80 TO-220 - 40oC to + 85oC AME8845AEBT180Z 1.80 TO-220 - 40oC to + 85oC AME8845BEBT180 1.80 TO-220 - 40oC to + 85oC Note: yyww/ yww represents the date code * A line on top of the first letter represents lead free plating such as AME8845 Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability. 5 AME, Inc. AME8845 3A CMOS LDO n Ordering Information Part Number AME8845BEBT180Z Marking* AME8845 BEBT180 yyww AME8845 AEDT180 yyww AME8845 AEDT180 yyww AME8845 BEDT180 yyww AME8845 BEDT180 yyww AME8845 AEDV180 yyww AME8845 AEDV180 yyww BAZyww BAZyww AME8845 AEBT250 yyww AME8845 AEBT250 yyww AME8845 BEBT250 yyww AME8845 BEBT250 yyww AME8845 AEDT250 yyww AME8845 AEDT250 yyww Output Voltage 1.80 Package TO-220 Operating Temp. Range - 40oC to + 85oC AME8845AEDT180 1.80 TO-263-3 - 40oC to + 85oC AME8845AEDT180Z 1.80 TO-263-3 - 40oC to + 85oC AME8845BEDT180 1.80 TO-263-3 - 40oC to + 85oC AME8845BEDT180Z 1.80 TO-263-3 - 40oC to + 85oC AME8845AEDV180 1.80 TO-263-5 - 40oC to + 85oC AME8845AEDV180Z AME8845AEGT180 AME8845AEGT180Z AME8845AEBT250 1.80 1.80 1.80 2.50 TO-263-5 SOT-223 SOT-223 TO-220 - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC AME8845AEBT250Z 2.50 TO-220 - 40oC to + 85oC AME8845BEBT250 2.50 TO-220 - 40oC to + 85oC AME8845BEBT250Z 2.50 TO-220 - 40oC to + 85oC AME8845AEDT250 2.50 TO-263-3 - 40oC to + 85oC AME8845AEDT250Z 2.50 TO-263-3 - 40oC to + 85oC 6 AME, Inc. AME8845 3A CMOS LDO n Ordering Information Part Number AME8845BEDT250 Marking* AME8845 BEDT250 yyww AME8845 BEDT250 yyww AME8845 AEDV250 yyww AME8845 AEDV250 yyww AZSyww AZSyww AME8845 AEBT330 yyww AME8845 AEBT330 yyww AME8845 BEBT330 yyww AME8845 BEBT330 yyww AME8845 AEDT330 yyww AME8845 AEDT330 yyww AME8845 BEDT330 yyww AME8845 BEDT150 yyww AME8845 AEDV330 yyww AME8845 AEDV330 yyww Output Voltage 2.50 Package TO-263-3 Operating Temp. Range - 40oC to + 85oC AME8845BEDT250Z 2.50 TO-263-3 - 40oC to + 85oC AME8845AEDV250 2.50 TO-263-5 - 40oC to + 85oC AME8845AEDV250Z AME8845AEGT250 AME8845AEGT250Z AME8845AEBT330 2.50 2.50 2.50 3.30 TO-263-5 SOT-223 SOT-223 TO-220 - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC - 40oC to + 85oC AME8845AEBT330Z 3.30 TO-220 - 40oC to + 85oC AME8845BEBT330 3.30 TO-220 - 40oC to + 85oC AME8845BEBT330Z 3.30 TO-220 - 40oC to + 85oC AME8845AEDT330 3.30 TO-263-3 - 40oC to + 85oC AME8845AEDT330Z 3.30 TO-263-3 - 40oC to + 85oC AME8845BEDT330 3.30 TO-263-3 - 40oC to + 85oC AME8845BEDT330Z 3.30 TO-263-3 - 40oC to + 85oC AME8845AEDV330Z 3.30 TO-263-5 - 40oC to + 85oC AME8845AEDV330Z 3.30 TO-263-5 - 40oC to + 85oC 7 AME, Inc. AME8845 3A CMOS LDO n Absolute Maximum Ratings Parameter Input Voltage Output Current Output Voltage ESD Classification Maximum 7 PD / (V IN - VO) GND - 0.3 to VIN + 0.3 B Unit V mA V 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 8 AME, Inc. AME8845 3A CMOS LDO n Thermal Information Parameter TO-252 TO-263 Thermal Resistance (ja) TO-220 SOT-223 Conductive TO-252 Non-Conductive Conductive TO-263 Non-Conductive Thermal Resistance (jc) Conductive TO-220 Non-Conductive Conductive SOT-223 Non-Conductive TO-252 Internal Power Dissipation (P D ) (T = 100oC) TO-263 TO-220 SOT-223 Maximum Junction Temperature Maximum Lead Temperature (10 Sec) 1200 2800 mW 3000 625 150 300 o Maximum 90 60 Unit o C/W 50 160 7 30 7 27 o C/W 7 24 7 31 C C o 9 AME, Inc. AME8845 3A CMOS LDO n Electrical Specifications VIN = VO(Nom) +1V, CIN=0.1F, COUT=2.2F, TA = 25OC unless otherwise noted Parameter Input Voltage Output Voltage Accuracy Symbol VIN VO IO=3A VO=VO(NOM) -2.0% IO=1mA 1.5V<=VO(NOM) <=1.8V Dropout Voltage VDROPOUT 1.8V Test Condition Min Note 1 -1.5 Typ Max 6 1.5 1200 700 300 3000 3 1.7 200 300 350 450 Units V % mV VO>1.2V VO>1.2V VIN = VO(NOM) +1V, VO<0.4V IO=0mA IO=1mA to 3A IO=1mA, VIN =VO+1 to VO+2 IO=1mA to 3A -0.2 -1 mA A A A A 0.2 1 % % o o 0.1 140 30 30 70 C C ppm/oC dB 50 30 VIN 0.4 2 2 10 Vrms Output Voltage Noise eN VEH VEL IEH IEL ISD EN Input Threshold VIN =VIN ,MIN to VIN , VEN =VIN =5V 0 V A A EN Input Leakage Shutdown Current Note1:VIN(min) =VOUT+VDROPOUT VEN =0V, VIN =5V VEN =0V, VIN =5V 10 AME, Inc. AME8845 3A CMOS LDO n Detailed Description The AME8845 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 4.5A. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 110oC. The AME8845 behaves like a current source when the load reaches 4.5A. 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. n External Capacitors The AME8845 is stable with an output capacitor to ground of 2.2F 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. 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. 11 AME, Inc. AME8845 Temperature Stability 2.6 3A CMOS LDO Dropout Voltage vs. Load Current 450 400 VOUT=2.5V 125oC 85oC 55oC 25oC -45oC -5oC 2.56 Dropout V oltage (m V) 5 15 25 35 45 55 65 75 85 95 105115125 350 300 250 200 150 100 50 Output V oiltage (V) 2.52 2.48 2.44 2.4 -45 -35 -25 -15 -5 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Temperature (oC) Load Current (A) Quiescent Current vs.Temperature 370 Dropout Voltage vs. Temperature 450 Quiescent Current @ 5V (uA) 350 Dropout Voltage @ 3A (m V) 400 VOUT =2.5V 330 350 310 300 290 250 270 200 250 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 125 150 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105115125 Temperature (oC) Temperature (o C) Quiescent Current vs. Supply Voltage 450 400 Current Limit vs. Temperature 9.0 8.0 125oC 7.0 Quiescent Current (uA) 350 Curr ent Lim it (A) 6.0 85oC 300 6.0 5.0 4.0 3.0 2.0 1.0 0.0 -40-30 -20 -10 0 10 20 25 30 40 50 60 70 80 90100 110 125 55oC 250 200 -45oC -5oC 25oC 150 100 50 0 0.0 1.0 2.0 3.0 4.0 5.0 Supply Voltage (V) Temperature(oC) 12 AME, Inc. AME8845 Output Voltage(2.5V) vs. Input Voltage 3.0 25 3A CMOS LDO Output Noise vs. Frequency VIN=5V CL=10F VIL=100mA VOUT=3.3V 2.5 20 O utput V oltage (V) 2.0 Output Noise (uV) 1.5 55 oC 85 C o 15 125 oC 1.0 10 -45C -45 oC -5 oC 25 oC 0 1 2 3 4 5 6 0.5 5 0.0 0 10 100 1000 10000 100000 Input Voltage (V) Frequency (HZ) PSRR vs. Frequency -20 Ground Current vs. Load Current 350 300 IQ(uA) -30 G round Current (mA) -40 250 200 150 100 50 0 0.0 PSRR (dB) -50 -60 -70 VIN=5V ILOAD=100mA C L=10F VOUT=3.3V 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 Vout = 3.3V Cin= 0.1 gF(ceramic) Cout= 2.2 gF(ceramic) Vin= Vo+1.0V 0.5 1.0 1.5 2.0 2.5 3.0 -80 1.0E+01 Frequency (Hz) Load Current (A) Load Regulation Deviation 0.16 O utput Voltage Deviation (% ) 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0.00 -0.02 -0.04 V OUT =2.5V CIN=3.3F (Ceramic) COUT=3.3F (Ceramic) IL=3A -0.06 -40-30 -20 -10 0 10 20 25 30 40 50 60 70 80 90100 110 125 Temperature(oC) 13 AME, Inc. AME8845 Line Transient Response Output Voltage Deviation(mV) Cin= 0 Cout= 4.7 gF(ceramic) 100 Vout = 3.3V Vin= 5.3V~4.3V TA =25oC ILOAD =1mA 50 0 3A CMOS LDO Li Input Voltage(V) 5.3 4.3 Time (20gS/DIV) Load Transient Response Output Voltage Deviation(mV) Cin= 0.1 gF(ceramic) Cout= 10uF(Tantalum) 100 Vout = 3.3V Vin= 5.3V~4.3V TA =25oC ILOAD:100mA--->3A 50 0 Load Current(A) 3 0.1 Time (500gS/DIV) 14 AME, Inc. AME8845 3A CMOS LDO n Package Dimension TO-263-3 Top View A K Side View E SYMBOLS A B C MILLIMETERS MIN 9.65 8.28 4.06 0.50 1.14 * INCHES MIN 0.380 0.326 0.160 0.020 0.045 * MAX 10.42 9.66 4.83 1.02 1.40 2.54 15.60 2.93 MAX 0.410 0.380 0.190 0.040 0.055 B D H E G P 0.100 0.61417 H K N 14.60 0.99 0.5748 D G N Front View R 0.03898 0.11535 0.015REF 0.08976 0.11024 0o 8o 0.381REF 2.28 0 o P R 2.80 8 o C TO-263-5 Top View A E K Side View SYMBOLS A B C D E G H K L N P R W MILLIMETERS MIN 10.050 8.280 4.310 0.660 1.140 14.605 1.143 0.000 0.330 2.280 INCHES MIN 0.396 0.326 0.170 0.026 0.045 0.575 0.045 0.000 0.013 0.090 MAX 10.668 9.169 4.597 0.910 1.400 15.875 1.680 0.305 0.580 2.800 MAX 0.420 0.361 0.181 0.036 0.055 0.625 0.066 0.012 0.023 0.110 B H 1.70REF 0.067 REF P W D Front View C G N R 0o 8o 0.25REF 0o 8o 0.01REF 15 AME, Inc. AME8845 3A CMOS LDO n Package Dimension TO-252(DPAK)-EIAJ SYMBOLS Top View E K L B A Side View MILLIMETERS MIN MAX 0.58 1.95 1.50 0.60 6.80 7.20 2.85 * 2.30 0.97 5.50 1.40REF 0.45 1.60 0.51 0.45 6.40 5.40 2.20 5.20 INCHES MIN 0.0177 0.0630 0.0201 0.0177 0.2520 0.2126 0.0866 0.2047 MAX 0.0230 0.0768 0.0591 0.0236 0.2677 0.2835 0.1122 * 0.0906 0.0380 0.2165 A B C D E F F G H J K L G C 0.055REF J H D *: Typical Value Notes: 1. Controlling dimension: Millimeters. 2. Maximum lead thickness includes lead finish thickness Minimum lead thickness is the minimum thickness of base material. SOT-223 Top View D B1 Side View SYMBOLS c C MILLIMETERS MIN 0.02 0.60 2.90 0.24 6.30 3.30 INCHES MIN 0.0008 0.0236 0.1140 0.0094 0.2480 0.1299 MAX 0.10 0.84 3.15 0.38 6.71 3.71 MAX 0.0039 0.0330 0.1240 0.0150 0.2640 0.1460 A1 B B1 C D E 13o(4X) H E e Front View F A1 13o(4X) e H ? 2.30 BSC 6.70 0 o 0.0906 BSC 0.2638 0 o 7.30 10 1.80 o 0.2874 10o 0.0702 B F 1.40 0.0560 16 AME, Inc. AME8845 3A CMOS LDO n Package Dimension TO-220 Top View O M I N G SYMBOLS A C D E G I Side View MILLIMETERS MIN 5.58 3.55 0.50 0.30 9.65 3.53 0.50 1.14 2.28 12.70 14.22 INCHES MIN 0.2197 0.1398 0.0197 0.0118 0.3799 0.1390 0.0197 0.0449 0.0898 0.5000 0.5600 MAX 7.49 4.83 1.40 1.15 10.67 4.09 1.15 1.78 2.80 14.74 16.51 MAX 0.2949 0.1900 0.0550 0.0453 0.4200 0.1610 0.0453 0.0700 0.1102 0.5803 0.6500 K P K M D A C E N O P 17 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. , September 2003 Document: 2006-DS8803/8814-G E-Mail:Longman@rccn.com.cn 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 |
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