AME, Inc. 800mA CMOS LDO AME8847 n General Description The AME8847 of positive, linear regulators feature low quiescent current (30µA 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. n Functional Block Diagram IN OUT Overcurrent Shutdown These rugged devices have both thermal shutdown, and current fold-back to prevent device failure under the "Worst" operating conditions. R1 Thermal Shutdown The AME8847 is stable with an output capacitance of 2.2µF or greater. AMP Vref=1.215V n Features R2 GND l Very Low Dropout Voltage l Guaranteed 800mA Output l Accurate to within +1.5% l 30µA Quiescent Current l Over-Temperature Shutdown n Typical Application l Current Limiting l Short Circuit Current Fold-back l Space-Saving SOT-223 & SOT-89 Packages IN IN l Factory Pre-set Output Voltages l Low Temperature Coefficient l All AME's Lead Free Products Meet RoHS Standards AME8847 OUT OUT GND 5V C1 C2 1µF 2.2µF 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. 800mA CMOS LDO AME8847 n Pin Configuration SOT-223 Top View SOT-89 Top View AME8847 1 2 3 AME8847AEGT 1. GND 2. OUT (TAB) 3. IN AME8847 * Die Attach: Non-Conductive Epoxy 1 2 3 AME8847AEFT 1. GND 2. IN (TAB) 3. OUT * Die Attach: Non-Conductive Epoxy 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 (SOT-89) 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 A: 1. GND 2. OUT 3. IN (SOT-223) 2 Rev.A.01 AME, Inc. 800mA CMOS LDO AME8847 n Ordering Information Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME8847AEFT180Z A8847 A18ww 1.8V SOT-89 - 40oC to 85oC AME8847AEGT180Z BHIyww 1.8V SOT-223 - 40oC to 85oC AME8847AEFT250Z A8847 A25ww 2.5V SOT-89 - 40oC to 85oC AME8847AEGT250Z BHJyww 2.5V SOT-223 - 40oC to 85oC AME8847AEFT330Z A8847 A33ww 3.3V SOT-89 - 40oC to 85oC AME8847AEGT330Z BFWyww 3.3V SOT-223 - 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. 800mA CMOS LDO AME8847 n Absolute Maximum Ratings Parameter Maximum Unit Input Voltage 8 V Output Current 1 A GND - 0.3 to V IN + 0.3 V Input, Output 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 Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Package Die Attach Symbol SOT-89 Maximum 46 θJC SOT-223 SOT-89 SOT-223 o C/W 31 Non-Conductive Epoxy 180 θJA o C/W 135 SOT-89 Internal Power Dissipation 550 PD SOT-223 Solder Iron(10 Sec)** Unit mW 800 350 o C * Measure θJC on backside center of tab. ** MIL-STD-202G 210F 4 Rev.A.01 AME, Inc. 800mA CMOS LDO AME8847 n Electrical Specifications TA = 25OC unless otherwise noted Parameter Input Voltage VIN Output Voltage Accuracy VOUT Dropout Voltage Test Condition Symbol VDROP Min IOUT = 1mA Note 1 7 V -1.5 1.5 % 1.8V <= VOUT(NOM) <= 2.0V IOUT = 800mA VOUT = VOUT(NOM) - 2.0% Typ Max Units 1400 See 1000 chart 800 2.0V < VOUT(NOM) <= 2.8V 2.8V < VOUT(NOM) mV Output Current IOUT VOUT >= 1.8V 800 mA Output Current Limit ILIM VOUT >= 1.8V 900 mA Output Short Circuit Current ISC VOUT < 0.8V 400 800 mA Quiescent Current IQ IOUT = 0mA 30 50 µA Ground Pin Current IGND IOUT = 1mA to 800mA 35 Output Voltage Line Regulation Output Voltage Load Regulation REGLINE REGLOAD IOUT = 1mA VIN = VOUT + 1 to VOUT + 2 µA 1.8V <= VOUT <= 2.0V -0.15 2.0V < VOUT < 4.0V -0.1 0.02 0.1 VOUT >= 4.0V -0.4 0.2 0.4 0.2 1 IOUT = 1mA to 800mA 0.15 % % Thermal Shutdown Temperature TSHDN 150 o Temperature Hysterisis THYS 30 o TC 30 Output Voltage Temperature Coefficient Power Supply Ripple Rejection Output Voltage Noise PSRR eN IOUT = 100mA COUT = 2.2µF f = 10Hz to 100KHz IOUT = 10mA f = 100Hz 60 f = 1KHz 50 f = 10KHz 20 COUT = 2.2µF 30 C C ppm/oC dB µVrms 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 800mA CMOS LDO n Detailed Description n External Capacitors The AME8847 of CMOS regulators contains a PMOS pass transistor, voltage reference, error amplifier, overcurrent protection, and thermal shutdown. The AME8847 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. 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. 6 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. Rev.A.01 AME, Inc. 800mA CMOS LDO AME8847 Ground Current vs. Input Voltage Load Step (1mA-800mA) VOUT (10mV/DIV) 45 O 85 C 35 30 25 O 25 C 20 15 10 5 0 0 1 2 3 4 5 COUT = 2.2µF CIN = 2.2µF VOUT IOUT (500mA/DIV) Ground Current (µA) 40 6 7 I OUT Time (20mS/DIV) 8 Input Voltage (V) Dropout Voltage vs. Output Voltage Power Supply Ripple Rejection Ratio 0 Top to Bottom IOUT = 800mA IOUT = 700mA IOUT = 600mA IOUT = 500mA IOUT = 400mA IOUT = 300mA IOUT = 200mA IOUT = 100mA 1000 800 600 -10 100mA -30 -40 -50 400 -60 200 -70 2.5 3.3 4 100 µ A 1K 100 µ A 1mA 100K Frequency (Hz) Line Transient Response Noise Measurement VIN = 5.0V COUT = 2.2µF Time (2mS/DIV) Rev.A.01 5 -80 10 10mA 100mA Output Voltage (V) VOUT (1mV/DIV) VIN (1V/DIV) 0 1.8 COUT = 2.2µF Tantalum -20 PSRR (dB) 1200 VOUT (1mV/DIV) Dropout Voltage (mV) 1400 10M COUT = 2.2µF No Filter Time (20ms/DIV) 7 AME, Inc. 800mA CMOS LDO AME8847 COUT = 2.2µF CIN = 1.0µF VOUT(NOM) = 3.3V Time (2mS/DIV) 8 Short Circuit Response VOUT (1V/DIV) IOUT (500mV/DIV) IOUT (500mA/DIV) VOUT (1V/DIV) Current Limit Response COUT = 2.2µF CIN = 1µF RLOAD < 100mΩ Time (2mS/DIV) Rev.A.01 AME, Inc. 800mA CMOS LDO AME8847 n Date Code Rule Marking Date Code Year A A A W W xxx0 A A A W W xxx1 A A A W W xxx2 A A A W W xxx3 A A A W W xxx4 A A A W W xxx5 A A A W W xxx6 A A A W W xxx7 A A A W W xxx8 A A A W W xxx9 n Tape and Reel Dimension SOT-89 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Rev.A.01 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT-89 12.0±0.1 mm 4.0±0.1 mm 1000pcs 180±1 mm 9 AME, Inc. 800mA CMOS LDO AME8847 n Tape and Reel Dimension SOT-223 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size 10 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 Rev.A.01 AME, Inc. 800mA CMOS LDO AME8847 n Package Dimension SOT-223 Top View Side View D B1 SYMBOLS θ C 13o(4X) H E e MILLIMETERS 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 2.30 BSC e Front View 13o(4X) F A1 0.0906 BSC F 1.40 1.80 0.0551 0.0709 H 6.70 7.30 0.2638 0.2874 θ B INCHES 0 o 10 o 0 o 10 o SOT-89 Side View Top View SYMBOLS D D1 H POLISH A A1 E A1 C S1 e Front View MILLIMETERS MIN MAX 1.39 1.60 0.8REF INCHES MIN MAX 0.05472 0.06299 0.0315REF C 0.35 0.44 0.01378 0.01732 D 4.39 4.60 0.17283 D1 1.35 1.83 0.05315 0.07205 E 2.28 3.60 0.08976 0.14173 0.1811 e 3.00REF 0.1181REF H 0.70REF 0.0276REF S1 1.50REF 0.0590REF MATTE FINISH A POLISH Rev.A.01 11 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. , July 2007 Document: 2095-DS8847-A.01 Corporate Headquarter U.S.A. (Subsidiary) AME, Inc. Analog Microelectronics, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District 3100 De La Cruz Blvd., Suite 201 Taipei 114, Taiwan. Tel : 886 2 2627-8687 Santa Clara, CA. 95054-2046 Tel: (408) 988-2388 Fax: 886 2 2659-2989 Fax: (408) 988-2489