Analog Microelectronics, Inc. AME8802 300mA CMOS LDO n General Description n Features The AME8802 family of positive, linear regulators feature low quiescent current (30µA typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-23-5 package is attractive for "Pocket" and "Hand Held" applications. l l Very Low Dropout Voltage Guaranteed 300mA Output Accurate to within 1.5% 30µA Quiescent Current Over-Temperature Shutdown Current Limiting Short Circuit Current Fold-back Power Good Output Function Power-Saving Shutdown Mode Space-Saving SOT-25 (SOT-23-5) Factory Pre-set Output Voltages l Low Temperature Coefficient l l l 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 An additional feature is a "Power Good" detector, which pulls low when the output is out of regulation. l l The AME8802 is stable with an output capacitance of 2.2µF or greater. n Applications l l l l n Functional Block Diagram l l IN l OUT Instrumentation Portable Electronics Wireless Devices Cordless Phones PC Peripherals Battery Powered Widgets Electronic Scales Overcurrent Shutdown n Typical Application Thermal Shutdown EN IN IN V ref x 1 1 0 % PG AMP R1 PG 5V V ref x 9 0 % V ref = 1 . 2 1 5 V ** OUT AME8802 GND OUT EN C1 C2 1µF 2.2µF R2 GND ** If output voltage specification is lower than 1.215V, Vref will be trimmed to 1.2V. 1 Analog Microelectronics, Inc. 300mA CMOS LDO AME8802 n Pin Configuration SOT-25 Top View 4 5 1. VIN 2. GND 3. EN 1 2 4. PG 5. OUT 3 n Ordering Information Part N umber Marking Output Voltage Package Operating Temp. R ange AME8802AEEV AAKww 3.3V SOT-25 -40 C to +85 C AME8802BEEV AALww 3.0V SOT-25 -40 C to +85 C AME8802C EEV AAMww 2.8V SOT-25 -40 C to +85 C AME8802D EEV AANww 2.5V SOT-25 -40 C to +85 C AME8802EEEV AAOww 3.8V SOT-25 -40 C to +85 C AME8802FEEV ABPww 3.6V SOT-25 -40 C to +85 C AME8802GEEV AC Gww 3.5V SOT-25 -40 C to +85 C AME8802HEEV AEHww 2.7V SOT-25 -40 C to +85 C AME8802IEEV AEPww 3.4V SOT-25 -40 C to +85 C AME8802JEEV AGRww 2.85V SOT-25 -40 C to +85 C AME8802KEEV AHTww 3.7V SOT-25 -40 C to +85 C AME8802LEEV AJMww 1.5V SOT-25 -40 C to +85 C AME8802MEEV AJNww 1.8V SOT-25 -40 C to +85 C AME8802NEEV AKQww 2.9V SOT-25 -40 C to +85 C AME8802OEEV AKRww 3.1V SOT-25 -40 C to +85 C AME8802TEEV ARVww 1.2V SOT-25 -40 C to +85 C AME8802UEEV ASD ww 3.2V SOT-25 -40 C to +85 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 O O O O # represents the date code Please consult AME sales office or authorized Rep./D istributor for other output voltage and package type availability. 2 Analog Microelectronics, Inc. AME8802 300mA CMOS LDO n Absolute Maximum Ratings Parameter Maximum Unit 8 V Output Current P D / (VIN - V O) mA Output Voltage GND - 0.3 to VIN + 0.3 V Input Voltage ESD Classification B n Recommended Operating Conditions Parameter Rating Ambient Temperature Range Junction Temperature Unit -40 to +85 o C -40 to +125 o C n Thermal Information Parameter Thermal Resistance (θja) Internal Power Dissipation (P D ) (∆ T = 100oC) Maximum SOT-25 260 SOT-25 380 Unit o C/W mW 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 3 Analog Microelectronics, Inc. 300mA CMOS LDO AME8802 n Electrical Specifications TA = 25 o C unless otherwise noted Parameter Symbol Input Voltage V IN Output Voltage Accuracy VO Dropout Voltage V DR OPOU T Test Condition Min IO =1mA Typ Ma x Units Note 1 7 V -1.5 1.5 % 1.2V<V O(NOM)<=2.0V IO=300mA V O =V ON OM -2.0% 1300 See chart 2.0V<V O(NOM)<=2.8V mV 300 2.8V<V O(NOM) IO V O>1.2V 300 Current Limit ILIM V O>1.2V 300 Short Circuit Current ISC V O<0.8V 150 300 mA Quiescent Current IQ IO =0mA 30 50 µA Ground Pin Current IGN D IO =1mA to 300mA 35 Output Current Line Regulation Load Regulation REGLIN E REG LOAD IO =1mA V IN =V O +1 to V O+2 V O < 2.0V -0.15 2.0V<=V O < 4.0V -0.1 4.0V <= Vo IO =1mA to 300mA mA 450 mA µA 0.15 % 0.02 0.1 % -0.4 0.2 0.4 % -1 0.2 1 % Over Temerature Shutdown OTS 150 o Over Temerature Hysterisis OTH 30 o V O Temperature Coefficient TC 30 Power Supply Rejection PSRR Output Voltage Noise eN EN Input Threshold EN Input Bias Current f=1kHz 50 f=10kHz 20 f=100kHz 15 Co=2.2µF 30 IO=100mA CO =2.2µF f=10Hz to 100kHz IO =10mA C C ppm/ oC dB µVrms V EH V IN =2.7V to 7V 2.0 Vin V V EL V IN =2.7V to 7V 0 0.4 V IEH V EN =V IN , V IN =2.7V to 7V 0.1 µA 0.5 µA 1 µA 0.4 V IEL V EN =0V, V IN =2.7V to 7V Shutdown Supply Current ISD V IN =5V, V O =0V, V EN <V EL Shutdown Output Voltage V O,SD IO=0.4mA, V EN <V EL Output Under Voltage V UV Output Over Voltage V OV 0.5 0 2.5V <=Vo <= 5.0V 85 1.2V <= Vo < 2.5V 75 2.5V <=Vo <= 5.0V 115 1.2V <= Vo < 2.5V 125 %V O(NOM) %V O(NOM) PG Leakage Current ILC V PG=7V 1 µA PG Voltage Rating V PG V O in regulation 7 V PG Voltage Low V OL ISINK =0.4mA 0.4 V Note1:V IN (m in)=V OU T+V DR OPOU T 4 400 Analog Microelectronics, Inc. AME8802 300mA CMOS LDO n Detailed Description n Enable The AME8802 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, thermal shutdown, and power good function. 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 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 150oC, or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC. The AME8802 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The AME8802 also incorporates current foldback to reduce power dissipation when the output is short circuited. This feature becomes active when the output drops below 0.8volts, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts. n Power Good The AME8802 includes the Power Good feature. Normally, Pin 4 is "Floating", however, when the output is not within ±10% of the specified voltage, it pulls low. This can occur under the following conditions: 1) 2) 3) 4) Input Voltage too low. During Over-Temperature. During Over-Current. If output is pulled up. n External Capacitors The AME8802 is stable with an output capacitor to ground of 2.2µF 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. A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be at least 0.1uF 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. 5 Analog Microelectronics, Inc. 300mA CMOS LDO AME8802 Load Step ( 1mA-300mA) Ground Current vs. Input Voltage Vo(5mV/DIV) 45 35 85 O C 30 Output C L =2.2µF C I N =2.2µF 25 25 O C 20 IL(200mA/DIV) µA) Ground Current (µ 40 15 10 5 IL o a d 0 0 0 1 2 3 4 5 6 7 TIME( 20mS/DIV) 8 Input Voltage (V) C L =2µF R L =10Ω C B Y P =1000pF Enable (2V/DIV) Chip Enable Transient Response Output (1V/DIV) 0 C L =2µF R L =10Ω 0 Output (1V/DIV) Enable (2V/DIV) Chip Enable Transient Response 0 0 TIME ( 1mS/DIV) TIME ( 1mS/DIV) Drop Out Voltage vs Load Current Drop Out Voltage vs Output Voltage 250 Dropout Voltage (mV) Drop Out Voltage (mV) 300 250 200 IL O A D= 3 0 0 m A 150 IL O A D = 2 0 0 m A 100 IL O A D = 1 0 0 m A 50 200 150 100 50 0 0 2.5 6 Top to bottom V O U T =2.5V V O U T =2.8V V O U T =3.0V V O U T =3.3V V O U T =3.5V V O U T =3.8V 2.75 3 3.25 3.5 Output Voltage (V) 3.75 4 0 50 100 150 200 Load Current (mA) 250 300 Analog Microelectronics, Inc. AME8802 300mA CMOS LDO Power Supply Rejection Ratio 0 -10 PSRR (dB) 100mA C L =2.2µF Tantalum C B Y P =0 -20 -30 -40 -50 10mA 100mA -60 -70 -80 1.0E+01 1mA 100µA 100µA 1.0E+03 1.0E+05 1.0E+07 Frequency (Hz) Overtemperature Shutdown I OUT (200mA/DIV) R L O A D =100Ω R S H O R T =0.1Ω VOUT (1V/DIV) 0 0 R L O A D =6.6Ω VOUT (1V/DIV) ILOAD (400mA/DIV) Short Circuit Response 0 0 TIME (0.5Sec/DIV) TIME (2mS/DIV) Noise Measurement IOUT (200mA/DIV) Current Limit Response VOUT (1V/DIV) 0 Vo (1mV/ DIV) R L O A D =3.3Ω CL = 2.2µF NO FILTER 0 TIME (2mS/DIV) TIME (20mS/DIV) 7 Analog Microelectronics, Inc. 300mA CMOS LDO AME8802 Stability vs. ESR vs ILOAD 10000 Stability vs. ESR vs I LOAD 10000 Unstable Region Unstable Region 1000 1000 C L =1µF 10 Stable Region 1 C L =2µF 100 Ω) ESR (Ω ESR (Ω Ω) 100 10 Stable Region 1 0.1 0.1 Untested Region Untested Region 0.01 0.01 0 50 100 150 0 200 50 100 150 ILOAD (mA) ILOAD (mA) Stability vs. ESR vs I LOAD Stability vs. ESR vs I LOAD 10000 10000 Unstable Region Unstable Region 1000 1000 Ω) ESR (Ω Ω) ESR (Ω 100 Stable Region 10 0.1 0.1 0.01 Untested Region 0 50 100 Stable Region 1 1 0.01 C L =10µF 100 C L =3µF 10 200 Untested Region 0.001 150 0 200 100 150 200 ILOAD (mA) ILOAD (mA) VIN DC = 5.0V Safe Operating Area Output Current (mA) VIN (1V/DIV) Transient Line Response VO (1mV/DIV) 50 300 SOT-23-5 100 10 0.1 1.0 Input-Output Voltage Differential (V) 8 TIME (2mS/DIV) 8.0 Analog Microelectronics, Inc. AME8802 300mA CMOS LDO Load Regulation vs. Temp. 35 0.58 34 0.56 Load Regulation (%) Quiescent Current @ 5V (uA) Quiescent Current vs. Temp. 33 32 31 30 29 28 0.54 0.52 0.50 0.48 0.46 0.44 0.42 0.40 27 -45 -5 25 55 -45 85 0 Temperature ( C) Shut Down Current vs.Temp. 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 25 55 0 -0.30 -0.35 -0.40 -0.45 -0.50 85 -5 25 55 85 Temperature (0C) Temperature ( C) Dropout Voltage vs. Temp. PG VOL vs.Temp. 220 0.45 210 PG VOL @ 0.4mA (V) Dropout Voltage @ 300mA (mV) 85 -0.25 -45 -5 55 -0.20 0.0 -45 25 EN Pin LO Bias Current vs.Temp EN pin LO bias current (uA) Shut Down Current (uA) 1.0 -5 Temperature (0C) 200 190 180 170 160 150 0.40 0.35 0.30 0.25 0.20 0.15 -45 -5 25 55 Temperature (0C) 85 -45 -5 25 55 85 Temperature (0C) 9 Analog Microelectronics, Inc. 300mA CMOS LDO AME8802 n Package Dimension SOT-25 A MILLIMETERS MIN MAX 1.00 1.45 INCHES MIN MAX 0.0394 0.0571 A1 A2 b C D E 0.00 0.70 0.35 0.08 2.70 1.40 0.0000 0.0276 0.0138 0.0031 0.1063 0.0551 e H L 1.90 BSC 2.60 3.00 0.30 - θ1 S1 0 0.85 SYMBOLS 10 ° 0.15 1.25 0.55 0.25 3.10 1.80 ° 10 1.05 0.0591 0.0492 0.0217 0.0098 0.1220 0.0709 0.07480 BSC 0.1024 0.1181 0.0118 ° 0 0.0335 ° 10 0.0413 www.analogmicro.com E-Mail: [email protected] 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-DS8802-E 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