Analog Microelectronics, Inc. AME8808 750mA CMOS LDO n General Description n Features The AME8808 family of positive, linear regulators feature low quiescent current (30A typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-223 and DPAK-2 packages are attractive for "Pocket" and "Hand Held" applications. l These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the "Worst" of operating conditions. l l l l l l l l l The AME8808 is stable with an output capacitance of 2.2F or greater. Very Low Dropout Voltage Guaranteed 750mA Output Accurate to within 1.5% 30A Quiescent Current Over-Temperature Shutdown Current Limiting Short Circuit Current Fold-back Space-Saving SOT-223 and DPAK-2 Package Factory Pre-set Output Voltages Low Temperature Coefficient n Applications l l n Functional Block Diagram l l IN l OUT l l Instrumentation Portable Electronics Wireless Devices Cordless Phones PC Peripherals Battery Powered Widgets Electronic Scales Overcurrent Shutdown n Typical Application R1 Thermal Shutdown OUT IN IN AMP OUT GND 5V V ref=1.215V AME8808 C1 C2 1F 2.2F R2 GND 1 Analog Microelectronics, Inc. 750mA CMOS LDO AME8808 n Pin Configuration S O T -223 T op V iew 1 2 D P A K -2 T op V iew 1. GND 1. GND 2. VOUT 2. VOUT (Connected with heat sink) 3. VIN 3. VIN 1 3 2 3 n Ordering Information P a rt N u m b e r M a rk in g O u tp u t V o lta g e P ackage O p e ra tin g T e m p . R a n g e A ME 8808A E GT A E Tyw w 3 .3 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808B E GT A E U yw w 3 .0 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808C E GT A E V yw w 2 .8 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808D E GT A E W yw w 2 .5 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808E E GT A E X yw w 3 .8 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808FE GT A E Yyw w 3 .6 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808GE GT A E Zyw w 3 .5 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808HE GT A F A yw w 2 .7 V S O T-2 2 3 -4 0 C to + 8 5 C A M E 8 8 0 8 IE G T A F B yw w 3 .4 V S O T-2 2 3 -4 0 C to + 8 5 C A M E 8808JE GT A G U yw w 2 .8 5 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808K E GT A H W yw w 3 .7 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808LE GT A J G yw w 1 .5 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808M E GT A J H yw w 1 .8 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808NE GT A K U yw w 2 .9 V S O T-2 2 3 -4 0 C to + 8 5 C A ME 8808OE GT A K V yw w 3 .1 V S O T-2 2 3 -4 0 C to + 8 5 C O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O P le a s e c o ns ult A M E s a le s o ffic e o r a utho rize d R e p ./D is trib uto r fo r o the r o utp ut vo lta g e a nd p a c k a g e typ e a va ila b ility. 2 Analog Microelectronics, Inc. AME8808 750mA CMOS LDO n Ordering Information (contd.) Part Number AME8808AECS AME8808BECS AME8808CECS AME8808DECS AME8808EECS AME8808FECS AME8808GECS AME8808HECS AME8808IECS AME8808JECS AME8808KECS AME8808LECS AME8808MECS AME8808NECS AME8808OECS Marking AME8808 AECS yyww AME8808 BECS yyww AME8808 CECS yyww AME8808 DECS yyww AME8808 EECS yyww AME8808 FECS yyww AME8808 GECS yyww AME8808 HECS yyww AME8808 IECS yyww AME8808 JECS yyww AME8808 KECS yyww AME8808 LECS yyww AME8808 MECS yyww AME8808 NECS yyww AME8808 OECS yyww Output Voltage Package Operating Temp. Range 3.3V DPAK-2 -40O C to +85OC 3.0V DPAK-2 -40O C to +85OC 2.8V DPAK-2 -40O C to +85OC 2.5V DPAK-2 -40O C to +85OC 3.8V DPAK-2 -40O C to +85OC 3.6V DPAK-2 -40O C to +85OC 3.5V DPAK-2 -40O C to +85OC 2.7V DPAK-2 -40O C to +85OC 3.4V DPAK-2 -40O C to +85OC 2.85V DPAK-2 -40O C to +85OC 3.7V DPAK-2 -40O C to +85OC 1.5V DPAK-2 -40O C to +85OC 1.8V DPAK-2 -40O C to +85OC 2.9V DPAK-2 -40O C to +85OC 3.1V DPAK-2 -40O C to +85OC Please consult AME sales office or authorized Rep./Distributor for other output voltage and package type availability. 3 Analog Microelectronics, Inc. 750mA CMOS LDO AME8808 n Absolute Maximum Ratings Pa ra m e te r Maximum Unit Input Voltage 8 V Output Current 1 A GND - 0.3 to V D D + 0.3 V Input, Output Voltage ESD Classification B n Recommended Operating Conditions Parameter Rating Unit Supply Voltage 4.5 to 5.5 V Ambient Temperature Range -40 to +85 o -40 to +125 o Junction Temperature C C n Thermal Information Parameter Maximum SOT-223 160 Thermal Resistance (jc ) o DPAK-2 60 SOT-223 625 Internal Power Dissipation (PD ) ( T = 100oC) Unit C/W mW DPAK-2 3,000 Maximum Junction Temperature 150 o C Maximum Lead Temperature ( 10 Sec) 300 o C Caution: Stress above the listed absolute rating may cause permanent damage to the device 4 Analog Microelectronics, Inc. AME8808 750mA CMOS LDO n Electrical Specifications TA = 25 o C unless otherwise noted Parameter Symbol Input Voltage VIN Output Voltage Accuracy VO Dropout Voltage VDROPOUT Test Condition Min IO=1mA Typ Max Units Note 1 8 V -1.5 1.5 % 1.5V<VO(NOM)<=2.0V IO=750mA VO=VONOM -2.0% 1400 See chart 2.0V<VO(NOM)<=2.8V 2.8V<VO(NOM)<3.8V 1000 mV 750 Output Current IO VO>1.2V 750 Current Limit ILIM VO>1.2V 750 Short Circuit Current ISC VO<0.8V 300 600 mA Quiescent Current IQ IO=0mA 30 50 A Ground Pin Current IGND IO=1mA to 750mA 30 50 A Line Regulation REGLINE 0.15 % 0.02 0.1 % Load Regulation REGLOAD 0.2 1 % Over Temerature Shutdown OTS IO=5mA VO < 2.0V VIN=VO+1 to VO+2 VO >= 2.0V IO=1mA to 750mA mA 850 150 o o Over Temerature Hysterisis OTH 30 VO Temperature Coefficient TC 30 Power Supply Rejection PSRR Output Voltage Noise eN IO=100mA CO=2.2mF f=10Hz to 100kHz IO=10mA,CBYP=0mF mA f=1kHz 50 f=10kHz 20 f=100kHz 15 Co=2.2mF 30 Co=100mF 20 C C ppm/oC dB mVrms Note1:VIN(min)=VOUT+VDROPOUT 5 Analog Microelectronics, Inc. 750mA CMOS LDO AME8808 n Detailed Description The AME8808 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 150oC, or the current exceeds 750mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC. The AME8808 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The AME8808 also incorporates current foldback to reduce power dissipation when the output is short circuited. This feature becomes active when the output drops below 0.8 volts, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts. n External Capacitors The AME8806/8809 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. 6 n Enable The Enable pin normally floats high. When actively, 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. Analog Microelectronics, Inc. AME8808 750mA CMOS LDO Load Step ( 1mA-600mA) Ground Current vs. Input Voltage Vo(10mV/DIV) 45 35 85 O C 30 25 Output C L =2.2F CIN=2.2F 25 O C 20 IL(200mA/DIV) A) Ground Current ( 40 15 10 5 IL o a d 0 0 0 1 2 3 4 5 6 7 8 TIME ( 20mS/DIV) Input Voltage (V) Drop Out Voltage vs. Output Voltage Power Supply Rejection Ratio 0 -10 0.25 IL O A D = 6 0 0 m A -20 0.2 PSRR (dB) Drop Out Voltage (V) 0.3 0.15 0.1 C L =2.2 F Tantalum C B Y P =0 100mA -30 -40 -50 10mA 100mA -60 0.05 -70 0 2 2.5 3 3.5 4 4.5 5 5.5 -80 1.0E+01 Output Voltage (V) DPAK-2 With HS capable of twice jc Input-Output Voltage Differential (V) 1.0E+05 1mA 1.0E+07 VIN(1V/DIV) Line Transient Response VOUT (10mV/DIV) Output Current (mA) SOT-223 1.0E+03 100 A Frequency (Hz) Safe Operating Area 75 O C rise 100 A C L O A D =2.2F IL O A D = 1 m A V O U T D C =3.3V V I N D C =4.5V TIME (200mS/DIV) 7 Analog Microelectronics, Inc. 750mA CMOS LDO AME8808 Noise Measurement I OUT (200mA/DIV) 0 R L O A D =6.6 VOUT (1V/DIV) Vo (1mV/ DIV) CL = 2.2F NO FILTER Overtemperature Shutdown 0 TIME (0.5Sec/DIV) TIME (20mS/DIV) Short Circuit Response TIME (2mS/DIV) 8 I OUT (200mV/DIV) C L O A D =2.2F C I N =1.0F R L O A D =3.3 V O U T N O M =3.3V C L O A D =2.2F C IN = 1F R L O A D < 1 0 0 m V OUT (1V/DIV) IOUT (200mA/DIV) VOUT (1V/DIV) Current Limit Response TIME (2mS/DIV) Analog Microelectronics, Inc. AME8808 750mA CMOS LDO n Package Dimension TO-252 (DPAK) SYMBOLS A B C D E F G H I J K L MILLIMETERS MIN MAX 0.45 0.58 1.60 1.95 0.51 0.45 0.60 6.40 6.80 5.40 5.80 2.20 2.85 * 2.30 0.90 0.97 5.20 5.50 0.89 2.03 INCHES MIN MAX 0.0177 0.023 0.06 0.0768 0.02 0.0177 0.0236 0.252 0.2677 0.2126 0.2283 0.0866 0.1122 * 0.0906 0.0354 0.038 0.20 0.22 0.035 0.08 * : 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. TO-252 (DPAK) SYMBOLS A B C D E F G H I J K L MILLIMETERS MIN MAX 0.45 0.58 1.60 1.95 0.51 0.45 0.60 6.40 6.80 5.40 5.80 2.20 2.85 * 2.30 0.90 0.97 5.20 5.50 0.89 2.03 INCHES MIN MAX 0.0177 0.023 0.06 0.0768 0.02 0.0177 0.0236 0.252 0.2677 0.2126 0.2283 0.0866 0.1122 * 0.0906 0.0354 0.038 0.20 0.22 0.035 0.08 * : 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. 9 Analog Microelectronics, Inc. 750mA CMOS LDO AME8808 n Package Dimension SOT-223 A MILLIMETERS MIN MAX 1.50 1.80 INCHES MIN MAX 0.0591 0.0709 A1 B B1 C 0.02 0.60 2.895 0.24 0.0008 0.0236 0.1140 0.0094 D E e e1 H 6.299 6.706 3.30 3.708 2.30 BSC 4.60 BSC 6.70 7.30 0.2480 0.2640 0.1299 0.1460 0.090 BSC 0.181 BSC 0.2638 0.2874 L L1 L2 0.91 MIN 2.00 MAX 0.06 BSC 0.0360 MIN 0.0787 MAX 0.0024 BSC SYMBOLS 10 0 0.10 0.838 3.15 0.381 10 0 0.0039 0.033 0.1240 0.0150 10 www.analogmicro.com E-Mail: info@analogmicro.com Life Support Policy: These products of Analog Microelectronics, Inc. are not authorized for use as critical components in lifesupport devices or systems, without the express written approval of the president of Analog Microelectronics, Inc. Analog Microelectronics, 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. Analog Microelectronics, Inc., August 2001 Document: 2006-DS8808-C Corporate Headquarters Asia Pacific Headquarters Analog Microelectronics, Inc. AME, Inc. 3100 De La Cruz Blvd. Suite 201 Santa Clara, CA. 95054-2046 2F, 187 Kang-Chien Road, Nei-Hu District Taipei 114, Taiwan, R.O.C. Tel : (408) 988-2388 Fax: (408) 988-2489 Tel : 886 2 2627-8687 Fax : 886 2 2659-2989