AME AME8843 n General Description The AME8843 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-223 package is attractive for "Pocket" and "Hand Held" applications. 750mA CMOS LDO n Functional Block Diagram IN OUT Overcurrent Shutdown R1 Thermal Shutdown These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the "Worst" operating conditions. AMP The AME8843 is stable with an output capacitance of 2.2µF or greater. R2 Vref=1.215V GND n Features l Very Low Dropout Voltage l Guaranteed 750mA Output l Accurate to within 1.5% l 30µA Quiescent Current n Typical Application l Over-Temperature Shutdown l Current Limiting IN OUT l Short Circuit Current Fold-back IN l Space-Saving SOT-223 Package GND l Factory Pre-set Output Voltages l Low Temperature Coefficient l All AME's Lead Free Products Meet RoHS Standards AME8843 OUT C1 C2 1µF 2.2µF 5V n Applications l Instrumentation l Portable Electronics l Wireless Devices l Cordless Phones l PC Peripherals l Battery Powered Widgets Rev. A.02 1 AME AME8843 750mA CMOS LDO n Pin Configuration SOT-223 Top View AME8843 1. IN AME8843 1 2 3 2. GND(TAB) 3. OUT * Die Attach: Conductive Epoxy n Pin Description 2 Pin Number Pin Name Pin Description 1 IN 2 GND Ground connection pin. 3 OUT LDO voltage regulator output pin. It should be decoupled with a 2.2µF or greater value low ESR ceramic capacitor. Input voltage pin. It should be decoupled with 1µF or greater capacitor. Rev. A.02 AME AME8843 750mA CMOS LDO n Ordering Information AME8843 x x x x xxx x Special Feature Output Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Pin Configuration Operating Ambient Number Temperature Package Type Output Voltage of Range Pins A: 1. IN (SOT-223) 2. GND 3. OUT E: -40OC to +85 OC G: SOT-223 T: 3 180: V=1.8V 250: V=2.5V Special Feature Z: Lead Free n Ordering Information Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME8843AEGT180 AWZyww 1.8V SOT-223 - 40oC to +85oC AME8843AEGT180Z AWZyww 1.8V SOT-223 - 40oC to+85oC AME8843AEGT250 AWFyww 2.5V SOT-223 - 40oC to +85oC AME8843AEGT250Z AWFyww 2.5V SOT-223 - 40oC to +85oC Note: yww represents the date code * A line on top of the first character represents lead free plating such as AWZww. Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type. Rev. A.02 3 AME AME8843 750mA CMOS LDO n Absolute Maximum Ratings Parameter Maximum Unit -0.3 to +8 V Output Voltage -0.3 to VIN + 0.3 V Output Current PD / (V IN - VOUT) mA Input Voltage B* ESD Classification Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. * HBM B:2000V~3999V n Recommended Operating Conditions Parameter Symbol Rating Unit Ambient Temperature Range TA - 40 to +85 o Junction Temperature Range TJ - 40 to +125 o Storage Temperature Range TSTG - 65 to +150 o C C C n Thermal Information Parameter Package Die Attach Thermal Resistance* ( Junction to Case) Thermal Resistance ( Junction to Ambient) Symbol Maximum θJC 25 Unit o SOT-223 Internal Power Dissipation Conductive Epoxy θJA 120 PD 900 C/W mW Maximum Junction Temperature 150 o C Solder Iron (10 Sec)** 350 o C * Measure θJC on backside center of tab. ** MIL-STD-202G 210F 4 Rev. A.02 AME AME8843 750mA CMOS LDO n Electrical Specifications TA = 25OC unless otherwise noted Parameter Symbol Input Voltage VIN Output Voltage Accuracy VO Test Condition IO=1mA Min Typ Max Units Note 1 7 V -1.5 1.5 % 1.3V<=VO(NOM) <=1.4V Dropout Voltage VDROPOUT IO=750mA 1.4V<VO(NOM) <=2.0V VO=VO(NOM) -2.0% 2.0V<VO(NOM) <=2.8V 1900 See 1400 chart 1000 2.8V<VO(NOM) Output Current mV 750 IO VO>1.2V 750 mA Current Limit ILIM VO>1.2V 1500 2000 mA Short Circuit Current ISC VO<0.8V 750 Quiescent Current IQ IO=0mA 30 Ground Pin Current IGND IO =1mA to 750mA 35 Line Regulation Load Regulation Over Temperature Shutdown Over Temperature Hysterisis VO Temperature Coefficient Power Supply Rejection Output Voltage Noise REGLINE REGLOAD mA 50 µA 1.3V <= VO <= 1.4V -0.2 0.2 IO=1mA 1.4V < VO <= 2.0V -0.15 0.15 VIN =VO+1 to VO+2 2.0V < VO < 4.0V -0.1 0.02 0.1 4.0V <= VO -0.4 0.2 0.4 0.2 1 IO =1mA to 750mA µA % % 150 o OTH 30 o TC 30 OTS PSRR eN IO=100mA CO=2.2µF f=10Hz to 100kHz IO=10mA,CBYP =0µF f=100Hz 60 f=1kHz 50 f=10kHz 20 Co=2.2µF 30 C C ppm/oC dB µVrms Note1: V IN(MIN)=VOUT+VDROPOUT Note2: To prevent the Short Circuit Current protection feature from being prematurely activated, the input voltage must be applied before a current source load is applied. Rev. A.02 5 AME AME8843 750mA CMOS LDO n Detailed Description The AME8843 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 AME8843 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The AME8843 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 AME8843 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 0.1µF 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 Rev. A.02 AME AME8843 750mA CMOS LDO Ground Current vs. Input Voltage Load Step (1mA-600mA) Vo(10mV/DIV) 45 40 85 OC Ground Current (µ A) 35 30 Output C L=2.2µF CIN=2.2µF 25 O 25 C IL(200mA/DIV) 20 15 10 5 I Load 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 0.3 ILOAD=600mA 0.2 0.15 0.1 100mA CL=2.2µF Tantalum C BYP=0 -20 PSRR (dB) Drop Out Voltage (V) -10 0.25 -30 -40 -50 10mA 100mA -60 0.05 -70 100 µ A 100 µ A 1mA -80 0 2 2.5 3 3.5 4 4.5 5 10 5.5 Output Voltage (V) 1K 100K 10M Frequency (Hz) Safe Operating Area Line Transient Response 75O C rise SOT-223 370 With HS capable of twice θjc 1.2 2 3 Input-Output Voltage Differential (V) Rev. A.02 VOUT(10mV/DIV) Output Current (mA) 500 V IN(1V/DIV) 750 C LOAD =2.2µF I LOAD =1mA V OUTDC =3.3V V INDC =4.5V TIME (200mS/DIV) 7 AME AME8843 750mA CMOS LDO 0 R LOAD=6.6 Ω VOUT (1V/DIV) C L=2.2µF No Filter Overtemperature Shutdown I OUT (200mA/DIV) Vo (1mV DIV) Noise Measurement 0 TIME (20ms/DIV) TIME (0.5Sec/DIV) TIME (2mS/DIV) 8 IOUT (200mV/DIV) C LOAD =2.2µF C IN=1.0µF RLOAD=3.3Ω VOUTNOM =3.3V Short Circuit Response C LOAD=2.2µF C IN=1µF R LOAD <100mΩ VOU T (1V/DIV) IOUT (200mA/DIV) VOUT (1V/DIV) Current Limit Response TIME (2mS/DIV) Rev. A.02 AME AME8843 750mA CMOS LDO n Tape and Reel Dimension SOT-223 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Rev. A.02 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT-223 12.0±0.1 mm 4.0±0.1 mm 2500pcs 330±1 mm 9 AME AME8843 750mA CMOS LDO n Package Dimension SOT-223 Top View Side View SYMBOLS D B1 θ C o 13 (4X) H PIN 1 E e Front View o 13 (4X) F A1 10 MILLIMETERS INCHES MIN MAX MIN MAX A1 0.01 0.10 0.0004 0.0039 B 0.60 0.84 0.0236 0.0330 B1 2.90 3.15 0.1140 0.1240 C 0.24 0.38 0.0094 0.0150 D 6.30 6.71 0.2480 0.2640 E 3.30 3.71 0.1299 0.1460 F 1.40 1.80 0.0551 0.0709 2.30 BSC e H θ 6.70 0 o 0.0906 BSC 7.30 10 o 0.2638 0 o 0.2874 10 o B Rev. A.02 www.ame.com.tw E-Mail: [email protected] 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. , November 2008 Document: 2013-DS8843-A.02 Corporate Headquarter AME, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989