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| AME, Inc. AME8847 n General Description The AME8847 of positive, linear regulators feature low quiescent current (30A typ.) with low dropout voltage, making them ideal for battery applications. The spacesaving SOT-223 & SOT-89 packages are attractive for "Pocket" and "Hand Held" applications. These rugged devices have both thermal shutdown, and current fold-back to prevent device failure under the "Worst" operating conditions. The AME8847 is stable with an output capacitance of 2.2F or greater. 800mA CMOS LDO n Functional Block Diagram IN OUT Overcurrent Shutdown Thermal Shutdown R1 AMP n Features l Very Low Dropout Voltage l Guaranteed 800mA Output l Accurate to within +1.5% l 30A Quiescent Current l Over-Temperature Shutdown l Current Limiting l Short Circuit Current Fold-back l Space-Saving SOT-223 & SOT-89 Packages l Factory Pre-set Output Voltages l Low Temperature Coefficient l All AME's Lead Free Products Meet RoHS Standards IN Vref=1.215V R2 GND n Typical Application AME8847 OUT GND OUT IN C1 5V 1F C2 2.2F n Applications l Instrumentation l Portable Electronics l Wireless Devices l Cordless Phones l PC Peripherals l Battery Powered Widgets Rev.A.01 1 AME, Inc. AME8847 n Pin Configuration SOT-223 Top View AME8847AEGT 1. GND 2. OUT (TAB) 3. IN * Die Attach: Non-Conductive Epoxy SOT-89 Top View AME8847AEFT 1. GND 2. IN (TAB) 3. OUT * Die Attach: Non-Conductive Epoxy 800mA CMOS LDO AME8847 AME8847 1 2 3 1 2 3 n Ordering Information AME8847 x x x x xxx x Special Feature Output Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Pin Configuration A: 1. GND 2. IN 3. OUT A: 1. GND 2. OUT 3. IN Operating Ambient Temperature Range E: -40OC to 85OC Package Type F: SOT-89 G: SOT-223 Number of Pins T: 3 Output Voltage 180: V=1.8V 250: V=2.5V 330: V=3.3V Special Feature Z: Lead Free (SOT-89) (SOT-223) 2 Rev.A.01 AME, Inc. AME8847 n Ordering Information Part Number AME8847AEFT180Z AME8847AEGT180Z AME8847AEFT250Z AME8847AEGT250Z AME8847AEFT330Z AME8847AEGT330Z 800mA CMOS LDO Marking* A8847 A18ww BHIyww A8847 A25ww BHJyww A8847 A33ww BFWyww Output Voltage 1.8V 1.8V 2.5V 2.5V 3.3V 3.3V Package SOT-89 SOT-223 SOT-89 SOT-223 SOT-89 SOT-223 Operating Ambient Temperature Range - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC Note: ww & yww represents the date code pls refer to Date Code Rule on Package Dimension. * A line on top of the first letter represents lead free plating such as A8847 Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability. Rev.A.01 3 AME, Inc. AME8847 n Absolute Maximum Ratings Parameter Input Voltage Output Current Input, Output Voltage ESD Classification 800mA CMOS LDO Maximum 8 1 GND - 0.3 to V IN + 0.3 B* Unit V A V Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. *HBM B:2000V~3999V n Recommended Operating Conditions Parameter Ambient Temperature Range Junction Temperature Range Storage Temperature Range Symbol TA TJ TSTG Rating - 40 to 85 - 40 to 125 - 65 to 150 Unit o o o C C C n Thermal Information Parameter Thermal Resistance* (Junction to Case) Package SOT-89 Die Attach Symbol JC Maximum 46 Unit o C/W SOT-223 SOT-89 SOT-223 SOT-89 31 180 JA 135 550 PD mW 800 350 o o Thermal Resistance (Junction to Ambient) Non-Conductive Epoxy C/W Internal Power Dissipation SOT-223 Solder Iron(10 Sec)** C * Measure JC on backside center of tab. ** MIL-STD-202G 210F 4 Rev.A.01 AME, Inc. AME8847 n Electrical Specifications TA = 25OC unless otherwise noted Parameter Input Voltage Output Voltage Accuracy Symbol VIN VOUT IOUT = 800mA VOUT = VOUT(NOM) - 2.0% IOUT = 1mA 1.8V <= VOUT(NOM) <= 2.0V 2.0V < VOUT(NOM) <= 2.8V 2.8V < VOUT(NOM) Output Current Output Current Limit Output Short Circuit Current Quiescent Current Ground Pin Current Output Voltage Line Regulation Output Voltage Load Regulation Thermal Shutdown Temperature Temperature Hysterisis Output Voltage Temperature Coefficient Power Supply Ripple Rejection IOUT ILIM ISC IQ IGND VOUT >= 1.8V VOUT >= 1.8V VOUT < 0.8V IOUT = 0mA IOUT = 1mA to 800mA IOUT = 1mA VIN = VOUT + 1 to VOUT + 2 1.8V <= VOUT <= 2.0V 2.0V < VOUT < 4.0V VOUT >= 4.0V REGLOAD TSHDN THYS TC f = 100Hz PSRR IOUT = 100mA COUT = 2.2F f = 10Hz to 100KHz IOUT = 10mA f = 1KHz f = 10KHz COUT = 2.2F IOUT = 1mA to 800mA -0.15 -0.1 -0.4 0.02 0.2 0.2 150 30 30 60 50 20 30 Vrms dB 800 900 400 30 35 0.15 0.1 0.4 1 % o 800mA CMOS LDO Test Condition Min Note 1 -1.5 Typ Max Units 7 1.5 1400 See 1000 chart 800 V % Dropout Voltage VDROP mV mA mA 800 50 mA A A REGLINE % C C o ppm/oC Output Voltage Noise eN Note1: VIN(MIN) = VOUT + VDROP 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.01 5 AME, Inc. AME8847 n Detailed Description The AME8847 of CMOS regulators contains a PMOS pass transistor, voltage reference, error amplifier, overcurrent 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 900mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC. The AME8847 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The AME8847 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. 800mA CMOS LDO n External Capacitors The AME8847 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 Rev.A.01 AME, Inc. AME8847 Ground Current vs. Input Voltage 45 800mA CMOS LDO Load Step (1mA-800mA) VOUT (10mV/DIV) 40 Ground Current (A) 35 30 25 20 15 10 5 0 0 1 2 3 4 85 C O COUT = 2.2F CIN = 2.2F VOUT IOUT (500mA/DIV) 25 C O I OUT 5 6 7 8 Time (20mS/DIV) Input Voltage (V) Dropout Voltage vs. Output Voltage 1400 1200 1000 800 600 400 200 0 1.8 0 Power Supply Ripple Rejection Ratio -10 -20 Dropout Voltage (mV) PSRR (dB) Top to Bottom IOUT = 800mA IOUT = 700mA IOUT = 600mA IOUT = 500mA IOUT = 400mA IOUT = 300mA IOUT = 200mA IOUT = 100mA COUT = 2.2F Tantalum 100mA -30 -40 -50 -60 -70 -80 10 100mA 10mA 100 A 1K 100 A 100K 1mA 10M 2.5 3.3 4 5 Output Voltage (V) Frequency (Hz) Line Transient Response VIN (1V/DIV) Noise Measurement VIN = 5.0V COUT = 2.2F VOUT (1mV/DIV) COUT = 2.2F No Filter VOUT (1mV/DIV) Time (2mS/DIV) Time (20ms/DIV) Rev.A.01 7 AME, Inc. AME8847 Current Limit Response IOUT (500mA/DIV) VOUT (1V/DIV) VOUT (1V/DIV) IOUT (500mV/DIV) COUT = 2.2F CIN = 1.0F VOUT(NOM) = 3.3V 800mA CMOS LDO Short Circuit Response COUT = 2.2F CIN = 1F RLOAD < 100m Time (2mS/DIV) Time (2mS/DIV) 8 Rev.A.01 AME, Inc. AME8847 n Date Code Rule Marking A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A Date Code W W W W W W W W W W W W W W W W W W W W Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9 800mA CMOS LDO n Tape and Reel Dimension SOT-89 P W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package SOT-89 Carrier Width (W) 12.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 1000pcs Reel Size 1801 mm Rev.A.01 9 AME, Inc. AME8847 n Tape and Reel Dimension SOT-223 P 800mA CMOS LDO W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package SOT-223 Carrier Width (W) 12.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 2500pcs Reel Size 3301 mm 10 Rev.A.01 AME, Inc. AME8847 n Package Dimension SOT-223 Top View D B1 Side View c C 800mA CMOS LDO SYMBOLS A1 B B1 C D E MILLIMETERS MIN 0.01 0.60 2.90 0.24 6.30 3.30 INCHES MIN 0.0004 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 13o(4X) H E e Front View F A1 B 13o(4X) e F H 2.30 BSC 1.40 6.70 0 o 0.0906 BSC 0.0551 0.2638 0 o 1.80 7.30 10 o 0.0709 0.2874 10 o SOT-89 Top View D D1 H POLISH Side View SYMBOLS A A1 E MILLIMETERS MIN 1.39 INCHES MIN MAX MAX 1.60 0.05472 0.06299 0.0315REF 0.01378 0.01732 0.17283 0.1811 0.8REF 0.35 4.39 1.35 2.28 0.44 4.60 1.83 3.60 C D D1 C A1 0.05315 0.07205 0.08976 0.14173 0.1181REF 0.0276REF 0.0590REF S1 e Front View MATTE FINISH E e H S1 3.00REF 0.70REF 1.50REF A POLISH Rev.A.01 11 www.ame.com.tw E-Mail: sales@ame.com.tw 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. , July 2007 Document: 2095-DS8847-A.01 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 U.S.A. (Subsidiary) Analog Microelectronics, Inc. 3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2046 Tel: (408) 988-2388 Fax: (408) 988-2489 |
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