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AME, Inc. AME8821 n General Description 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application n Applications l Instrumentation l Portable Electronics l Wireless Devices l Cordless Phones l PC Peripherals l Battery Powered Widgets The AME8821 family of positive, linear regulators feature low quiescent current (17A typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-25/TSOT-25 packages are attractive for "Pocket" and "Hand Held"applications. These rugged devices have both Thermal Shutdown, and Current Limitation to prevent device failure under the "Worst" operating conditions. In application requires a low noise regulated supply. The AME8821 family uses the SR pin to program the output voltage's slew rate to control the in-rush current. This is specifically used in the USB application where large load capacitance is present at start-up. The AME8821 also features a logic-enabled sleep mode to shutdown the regulator, reducing quiescent current to 1A typical at T A= 25oC. The AME8821 is stable with an output capacitance of 4.7F or larger. n Function Block Diagram VIN * ENB or EN 10K AMP Vref GND R2 SR Current Limit / Thermal Protection R1 VOUT * AME8821A: ENB, AME8821B: EN n Features l Guaranteed 250mA Output l 17A Quiescent Current l Over-Temperature Shutdown l Over-Current Limitation l Noise Reduction SR Capacitor l Power-Saving Shutdown Mode l Space-Saving SOT-25/TSOT-25 Packages l Factory Pre-set Output Voltages l Enable pin option l ENB active low enable l EN active high enable l All AME's Lead Free Products Meet RoHS Standards n Typical Application VIN 1F IN SR AME8821A ENB GND OUT 0.01F + 4.7F VIN 1F IN SR AME8821B EN GND OUT 0.01F + 4.7F Rev.A.01 1 AME, Inc. AME8821 n Pin Configuration SOT-25/TSOT-25 Top View 5 4 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application SOT-25/TSOT-25 Top View AME8821AEEV 1. IN 2. GND 5 4 AME8821BEEV 1. IN 2. GND AME8821 3. ENB 4. SR 5. OUT AME8821 3. EN 4. SR 5. OUT 1 2 3 * Die Attach: Conductive Epoxy 1 2 3 * Die Attach: Conductive Epoxy n Pin Description Pin Number 1 2 Pin Name IN GND Pin Description Input voltage pin. It should be decoupled with 1F or greater capacitor. Ground connection pin. Enable pin. When pulled low, the PMOS pass transistor turns off, current consuming less than 1A. Enable bar pin. When pulled high, the PMOS pass transistor turns off, current consuming less than 1A. The SR(Slew Rate) terminal is used to control the VOUT in-rush current. LDO voltage regulator output pin. It should be decoupled with a 4.7F or greater value low ESR ceramic capacitor. EN 3 ENB 4 SR 5 OUT 2 Rev.A.01 AME, Inc. AME8821 n Ordering Information 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 x x x x xxx x Special Feature Output Voltage Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Operating Ambient Temperature Range E: -40OC to 85OC Pin Configuration Package Type Number of Pins V: 5 Output Voltage Special Feature A: 1. (SOT-25) 2. (TSOT-25) 3. 4. 5. B: 1. 2. (TSOT-25) 3. 4. 5. (SOT-25) IN GND ENB SR OUT IN GND EN SR OUT E: SOT-2X 180: 250: 285: 300: 330: V=1.8V V=2.5V V=2.85V V=3.0V V=3.3V Y: Lead free & Low profile Z: Lead free Rev.A.01 3 AME, Inc. AME8821 n Ordering Information Part Number AME8821AEEV180Z AME8821AEEV180Y AME8821AEEV250Z AME8821AEEV250Y AME8821AEEV285Z AME8821AEEV285Y AME8821AEEV300Z AME8821AEEV300Y AME8821AEEV330Z AME8821AEEV330Y AME8821BEEV180Z AME8821BEEV180Y AME8821BEEV250Z AME8821BEEV250Y AME8821BEEV285Z AME8821BEEV285Y AME8821BEEV300Z AME8821BEEV300Y AME8821BEEV330Z AME8821BEEV330Y 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Marking* BHXww BHXww BHYww BHYww BHZww BHZww BIAww BIAww BIBww BIBww BICww BICww BIDww BIDww BIEww BIEww BIFww BIFww BIGww BIGww Output Voltage 1.8V 1.8V 2.5V 2.5V 2.85V 2.85V 3.0V 3.0V 3.3V 3.3V 1.8V 1.8V 2.5V 2.5V 2.85V 2.85V 3.0V 3.0V 3.3V 3.3V Package SOT-25 TSOT-25 SOT-25 TSOT-25 SOT-25 TSOT-25 SOT-25 TSOT-25 SOT-25 TSOT-25 SOT-25 TSOT-25 SOT-25 TSOT-25 SOT-25 TSOT-25 SOT-25 TSOT-25 SOT-25 TSOT-25 Operating Ambient Temperature Range - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC - 40oC to 85oC Note: ww represents the date code and pls refer to the Date Code Rule before Package Dimension. * A line on top of the first character represents lead free plating such as BHXww. Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability. 4 Rev.A.01 AME, Inc. AME8821 n Absolute Maximum Ratings Parameter Input Voltage Output Current Output Voltage ESD Classification 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Maximum 6 PD / (V IN - VOUT) GND-0.3 to VIN+0.3 C* Unit V mA V Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device * HBM C: 4000V+ 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 C n Thermal Information Parameter Thermal Resistance* (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation Solder Iron (10 Sec)** SOT-25 TSOT-25 Conductive Epoxy Package Die Attach Symbol JC JA PD Maximum 81 Unit o C/W 260 400 350 mW o C * Measure JC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F Rev.A.01 5 AME, Inc. AME8821 n Electrical Specifications 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Over operating temperature range(TJ = -40oC to 125oC), VIN = VOUT(nom) + 1V, or VIN = VIN(min) whichever is greater, IOUT = 1mA, VEN = VIN(VENB = 0), and COUT = 4.7F, CIN = 1F unless otherwise noted. Typical values are at T A = 25oC. Parameter Input Voltage Output Voltage Accuracy Symbol VIN VOUT(nom) TA = 25 C TJ = -40oC to 125oC VOUT = 1.8V, 2.5V < VIN < 5.5V Output Voltage Line Regulation VOUT = 2.5V, 3V < VIN < 5.5V REGLINE VOUT = 2.85V, 3.3V < VIN < 5.5V VOUT = 3.0V, 3.5V < VIN < 5.5V VOUT = 3.3V, 3.8V < VIN < 5.5V Output Current Output Current Limit Quiescent Current Output Voltage Load Regulation IOUT ILIM IQ TA = 25oC o o Test Condition Min Note1 -1.5 -3 -0.30 Typ Max 5.5 1.5 3 Units V % 0.2 0.3 0.4 TJ = -40oC to 125oC -0.40 TA = 25 C o -0.25 0.15 0.25 0.35 TJ = -40oC to 125oC -0.35 TA = 25 C TA = 25oC o VOUT x VIN VOUT -0.25 0.15 0.25 0.35 x 100% TJ = -40oC to 125oC -0.35 -0.25 0.15 TJ = -40oC to 125oC -0.35 TA = 25 C TJ = -40oC to 125oC -0.2 -0.3 250 300 o %/V 0.25 0.35 0.1 0.2 0.3 mA (See Note2) VOUT = 0V, TA = 25oC 10A < IOUT < 250mA 10A < IOUT < 250mA TA = 25 C TJ = -40oC to 125oC 350 17 750 25 30 mA A VOUT VOUT x 100% REGLOAD 1mA <= IOUT <= 250mA TA = 25oC -0.1 0.0025 0.1 %/mA IOUT Note1 : VIN = VOUT + VDROP Note2 : Continuous output current and operating junction temperature are limited by internal protection circuitry, but it is not recommended that the device operate under conditions beyond those specified in this table for extended periods of time. 6 Rev.A.01 AME, Inc. AME8821 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application n Electrical Specifications (contd.) Parameter Symbol Test Condition VOUT(nom) = 1.8V IOUT = 250mA VOUT(nom) = 2.5V IOUT = 250mA Dropout Voltage @ VOUT = VOUT(nom) - 2%VOUT(nom) VDROP VOUT(nom) = 2.85V IOUT = 250mA VOUT(nom) = 3V IOUT = 250mA VOUT(nom) = 3.3V IOUT = 250mA Thermal Shutdown Temerature Temerature Hysterisis Output Voltage Temperature Coefficient Power Supply Ripple Rejection TSHDN THYS TC VOUT = 3.3V, f = 1KHz, PSRR IOUT = 100mA COUT = 4.7F C(SR) = 0.01F BW = 200Hz to 100KHz Output Voltage Noise eN IOUT = 250mA COUT = 4.7F, C(SR) = 0.47F Enable Bar High (Shutdown) Enable High (Enabled) Enable Bar Low (Enabled) Enable Low (Shutdown) Enable / Enable Bar Pin Current (Enabled) Shutdown Current VENB(HI) VEN(HI) VENB(LO) VEN(LO) IEN / IENB ISHDN TSTR ENB = 0, EN = VIN, VIN = 2.5V to 5.5V ENB = VIN, EN = 0, VIN = 2.5V to 5.5V VOUT = 3.3V Start up Time RLOAD = 22 COUT = 10F C(SR) = 0.01F C(SR) = 0.1F C(SR) = 0.22F TA = 25 C o Min o o o Typ 1000 500 Max 1100 1200 600 650 550 600 550 600 550 600 Units TA = 25 C TJ = -40 C to 125 C TA = 25 C TJ = -40 C to 125 C TA = 25 C TJ = -40 C to 125 C TA = 25oC TJ = -40oC to 125oC TA = 25 C TJ = -40 C to 125 C o o o o o o o o o 400 400 400 mV Thermal shutdown increasing 150 20 30 o C ppm TA = 25oC 65 dB TA = 25oC 100 VRMS 1.4 VIN = 2.5V to 5.5V 0 0.1 1 20 200 450 VIN V 0.3 1 2 A A mS Rev.A.01 7 AME, Inc. AME8821 n Detail Description The AME8821 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown function. The P-channel pass transistor receives data from the error amplifier, over-current limit, 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 about 350mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 130oC. The AME8821 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application n External Capacitors The AME8821 is stable with an output capacitor to ground of 4.7F or greater. Ceramic capacitors have the lower ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the higher ESR, resulting in the poor 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 V IN. The input capacitor should be at least 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 n Enable The Enable pin is optional. EN for active high enable, ENB for active low enable. When disable the Enable Pin EN = 0, ENB = VIN, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the standby current is less than 1A. 8 Rev.A.01 AME, Inc. AME8821 Output Voltage vs Load Current 3.310 3.305 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Quiescent Current vs Temperature 30 IOUT = 250mA Quiescent Current (A) Output Voltage (V) 3.300 3.295 3.290 3.285 3.280 3.275 3.270 3.265 3.260 VIN = 4.3V TA = 25oC 25 IOUT = 1mA 20 15 10 5 VIN = 4.3V -25 -10 5 20 35 50 65 80 95 110 125 0 15 30 45 60 75 90 105 120135150165 180195 210225 240 Load Current (mA) 0 -40 Temperature (oC) Dropout Voltage vs. Temperature 400 350 Output Spectral Noise Density vs. Frequency 400 Dropout Voltage (V) VIN = 4.3V IOUT = 250mA 250 200 150 100 50 Noise (V/OHz) 300 300 VIN=4.3V COUT=4.7F C(SR)=0.47F 200 IOUT = 250mA 100 IOUT =1mA 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 0 100 1000 10000 100000 Temperature (oC) Frequency (Hz) Output Impedance vs. Frequency 2.0 1.8 Power Supply Ripple Rejection Ratio 100 90 Output Impedance () 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 10 100 1000 10000 IOUT = 250mA Ripple Rejection (dB) VIN = 4.3V COUT = 4.7F 80 70 60 50 40 30 20 10 IOUT = 1mA IOUT = 250mA VIN = 4.3V VOUT = 3.3V COUT = 4.7F C(SR) = 0.47F IOUT = 50mA 100000 1000000 Frequency (Hz) 0 10 100 1000 10000 100000 1000000 Frequency (Hz) Rev.A.01 9 AME, Inc. AME8821 Line Transient Response 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Load Transient Response Output Voltage Output Current (mV) (mA) 300 Input Voltage (V) 5.3 4.3 VIN = 4.3V VOUT = 3.3V COUT = 4.7F 200 100 0 Output Voltage (mV) 20 0 -20 100 0 -100 Time (20S/Div) Time (20S/Div) Output Voltage, Enable Voltage vs Time (Start-Up) Output Voltage Enable Voltage (V) (V) Output Voltage, Enable Voltage vs Time (Start-Up) Output Voltage Enable Voltage (V) (V) 5 0 5 0 3 2 1 0 3 2 1 0 VIN = 4.3V VOUT = 3.3V IOUT = 250mA C(SR) = 0.22F COUT = 4.7F TA = 25J VIN = 4.3V VOUT = 3.3V IOUT = 250mA C(SR) = 0.01F COUT = 4.7F TA = 25J Time (100mS/Div) Time (10mS/Div) Output Voltage, Enable Voltage vs Time (Start-Up) Output Voltage Enable Voltage (V) (V) 3.290 5 Output Voltage vs. Temperature 3.285 3.280 IOUT = 1mA Output Voltage (V) 0 3.275 3.270 3.265 3.260 3.255 3.250 3.245 3.240 3.235 -40 -25 -10 5 20 35 50 65 80 95 110 125 IOUT = 250mA 3 2 1 0 VIN = 4.3V VOUT = 3.3V IOUT = 250mA C(SR) = 0.1F COUT = 4.7F TA = 25J VIN = 4.3V Time (100mS/Div) Temperature (oC) 10 Rev.A.01 AME, Inc. AME8821 Stability vs ESR vs I LOAD 100 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Unstable Region 10 VIN = 4.3V VOUT = 3.3V COUT= 4.7F ESR () Stable Region 1 Untested Region 0.1 0 60 90 120 150 ILOAD (mA) Rev.A.01 11 AME, Inc. AME8821 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 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application n Tape and Reel Dimension SOT-25 P W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package SOT-25 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm 12 Rev.A.01 AME, Inc. AME8821 n Tape and Reel Dimension TSOT-25 P 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application W AME PIN 1 AME Carrier Tape, Number of Components Per Reel and Reel Size Package TSOT-25 Carrier Width (W) 8.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 3000pcs Reel Size 1801 mm Rev.A.01 13 AME, Inc. AME8821 n Package Dimension SOT-25 Top View D 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application Side View SYMBOLS L MILLIMETERS MIN MAX 0.15 0.55 3.10 1.80 INCHES MIN 0.0000 0.0118 0.1063 0.0551 MAX 0.0059 0.0217 0.1220 0.0709 A A1 b D E e H L 1 1.20REF 0.00 0.30 2.70 1.40 0.0472REF H E S1 e c1 1.90 BSC 2.60 3.00 0.07480 BSC 0.10236 0.11811 0.0146BSC o 0.37BSC 0 o Front View A 10 0o 10 o S1 0.95BSC 0.0374BSC b TSOT-25 Top View D L Side View A1 SYMBOLS A+A1 MILLIMETERS MIN 0.90 0.30 2.70 1.40 INCHES MIN 0.0354 0.0118 0.1063 0.0551 MAX 1.25 0.50 3.10 1.80 MAX 0.0492 0.0197 0.1220 0.0709 H b D E S1 e c1 E e H L 1 S1 1.90 BSC 2.40 3.00 0.07480 BSC 0.09449 0.11811 0.0138BSC 0o 10 o 0.35BSC 0o 10 o Front View A 0.95BSC 0.0374BSC b A1 14 Rev.A.01 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: 1009-DS8821-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. 95054-2438 Tel : (408) 988-2388 Fax: (408) 988-2489 |
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