AME, Inc. AME8821 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application n General Description n Applications The AME8821 family of positive, linear regulators feature low quiescent current (17µA 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. l Instrumentation l Portable Electronics l Wireless Devices l Cordless Phones l PC Peripherals 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. l Battery Powered Widgets n Function Block Diagram VOUT VIN * ENB or EN 10KΩ The AME8821 also features a logic-enabled sleep mode to shutdown the regulator, reducing quiescent current to 1µA typical at T A= 25oC. The AME8821 is stable with an output capacitance of 4.7µF or larger. Current Limit / Thermal Protection AMP R1 Vref GND R2 SR * AME8821A: ENB, AME8821B: EN n Features n Typical Application l Guaranteed 250mA Output l 17µA Quiescent Current VIN l Over-Temperature Shutdown l Over-Current Limitation SR IN AME8821A 1µF ENB GND OUT l Noise Reduction SR Capacitor 0.01µF + 4.7µF 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 VIN 1µF IN SR AME8821B EN GND OUT 0.01µF + 4.7µF Rev.A.01 1 AME, Inc. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 n Pin Configuration SOT-25/TSOT-25 Top View SOT-25/TSOT-25 Top View 5 4 AME8821AEEV 5 4 1. IN 1. IN 2. GND AME8821 2. GND AME8821 3. ENB 4. SR 2 3 3. EN 4. SR 5. OUT 1 AME8821BEEV 5. OUT * Die Attach: Conductive Epoxy 1 2 3 * Die Attach: Conductive Epoxy n Pin Description Pin Number Pin Name 1 IN 2 GND Input voltage pin. It should be decoupled with 1µF or greater capacitor. Ground connection pin. EN Enable pin. When pulled low, the PMOS pass transistor turns off, current consuming less than 1µA. ENB Enable bar pin. When pulled high, the PMOS pass transistor turns off, current consuming less than 1µA. 4 SR The SR(Slew Rate) terminal is used to control the VOUT in-rush current. 5 OUT 3 2 Pin Description LDO voltage regulator output pin. It should be decoupled with a 4.7µF or greater value low ESR ceramic capacitor. Rev.A.01 AME, Inc. AME8821 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application n Ordering Information AME8821 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. (SOT-25) 2. (TSOT-25) 3. 4. 5. IN GND ENB SR OUT B: 1. 2. (TSOT-25) 3. 4. 5. IN GND EN SR OUT (SOT-25) Rev.A.01 Operating Ambient Temperature Range Package Type Number of Pins E: -40OC to 85OC E: SOT-2X V: 5 Output Voltage 180: 250: 285: 300: 330: V=1.8V V=2.5V V=2.85V V=3.0V V=3.3V Special Feature Y: Lead free & Low profile Z: Lead free 3 AME, Inc. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 n Ordering Information Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME8821AEEV180Z BHXww 1.8V SOT-25 - 40oC to 85oC AME8821AEEV180Y BHXww 1.8V TSOT-25 - 40oC to 85oC AME8821AEEV250Z BHYww 2.5V SOT-25 - 40oC to 85oC AME8821AEEV250Y BHYww 2.5V TSOT-25 - 40oC to 85oC AME8821AEEV285Z BHZww 2.85V SOT-25 - 40oC to 85oC AME8821AEEV285Y BHZww 2.85V TSOT-25 - 40oC to 85oC AME8821AEEV300Z BIAww 3.0V SOT-25 - 40oC to 85oC AME8821AEEV300Y BIAww 3.0V TSOT-25 - 40oC to 85oC AME8821AEEV330Z BIBww 3.3V SOT-25 - 40oC to 85oC AME8821AEEV330Y BIBww 3.3V TSOT-25 - 40oC to 85oC AME8821BEEV180Z BICww 1.8V SOT-25 - 40oC to 85oC AME8821BEEV180Y BICww 1.8V TSOT-25 - 40oC to 85oC AME8821BEEV250Z BIDww 2.5V SOT-25 - 40oC to 85oC AME8821BEEV250Y BIDww 2.5V TSOT-25 - 40oC to 85oC AME8821BEEV285Z BIEww 2.85V SOT-25 - 40oC to 85oC AME8821BEEV285Y BIEww 2.85V TSOT-25 - 40oC to 85oC AME8821BEEV300Z BIFww 3.0V SOT-25 - 40oC to 85oC AME8821BEEV300Y BIFww 3.0V TSOT-25 - 40oC to 85oC AME8821BEEV330Z BIGww 3.3V SOT-25 - 40oC to 85oC AME8821BEEV330Y BIGww 3.3V TSOT-25 - 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. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 n Absolute Maximum Ratings Parameter Maximum Unit 6 V Output Current PD / (V IN - VOUT) mA Output Voltage GND-0.3 to VIN+0.3 V Input Voltage C* ESD Classification Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device * HBM C: 4000V+ n Recommended Operating Conditions Parameter Symbol Rating Ambient Temperature Range TA - 40 to 85 Junction Temperature Range TJ - 40 to 125 Storage Temperature Range TSTG -65 to 150 Unit o C n Thermal Information Parameter Package Die Attach Thermal Resistance* (Junction to Case) Symbol Maximum θJC 81 Unit o C/W Thermal Resistance (Junction to Ambient) SOT-25 TSOT-25 Conductive Epoxy Internal Power Dissipation Solder Iron (10 Sec)** θJA 260 PD 400 350 mW o C * Measure θJC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F Rev.A.01 5 AME, Inc. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 n Electrical Specifications 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 = 4.7µF, CIN = 1µF unless otherwise noted. Typical values are at T A = 25oC. Parameter Input Voltage Symbol Test Condition Min Max Units Note1 5.5 V TA = 25 C -1.5 1.5 TJ = -40oC to 125oC -3 3 VIN o Output Voltage Accuracy VOUT(nom) TA = 25oC VOUT = 1.8V, 2.5V < VIN < 5.5V ∆VOUT x ∆VIN VOUT 3V < VIN < 5.5V REGLINE o TA = 25 C x 100% o TA = 25 C TA = 25oC o -0.25 VOUT = 3.3V, TA = 25 C -0.2 3.8V < VIN < 5.5V TJ = -40oC to 125oC -0.3 IOUT (See Note2) Output Current Limit ILIM VOUT = 0V, TA = 25oC IQ -0.25 0.3 0.25 0.35 0.15 0.25 0.35 0.15 TJ = -40oC to 125oC -0.35 Output Current Quiescent Current 0.15 TJ = -40oC to 125oC -0.35 VOUT = 3.0V, 3.5V < VIN < 5.5V -0.25 300 10µA < IOUT < 250mA TA = 25 C 10µA < IOUT < 250mA TJ = -40oC to 125oC %/V 0.25 0.35 0.1 0.2 0.3 250 o % 0.4 TJ = -40oC to 125oC -0.35 VOUT = 2.85V, 3.3V < VIN < 5.5V 0.2 TJ = -40oC to 125oC -0.40 VOUT = 2.5V, Output Voltage Line Regulation -0.30 Typ mA 350 750 17 25 30 mA µA Output Voltage Load Regulation ∆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. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 n Electrical Specifications (contd.) Parameter Test Condition Symbol 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 Min o TA = 25 C o 1000 1100 TJ = -40 C to 125 C TA = 25 C o 500 o TJ = -40 C to 125 C TA = 25 C 400 o VOUT(nom) = 3V TA = 25oC IOUT = 250mA TJ = -40oC to 125oC 550 600 400 mV 550 600 o TA = 25 C o 600 650 o o Units 1200 o TJ = -40 C to 125 C IOUT = 250mA Max o IOUT = 250mA VOUT(nom) = 3.3V Typ 400 o TJ = -40 C to 125 C 550 600 Thermal shutdown increasing Thermal Shutdown Temerature TSHDN Temerature Hysterisis THYS 20 TC 30 ppm TA = 25oC 65 dB TA = 25oC 100 µVRMS Output Voltage Temperature Coefficient 150 o C VOUT = 3.3V, f = 1KHz, Power Supply Ripple Rejection PSRR IOUT = 100mA COUT = 4.7µF C(SR) = 0.01µF BW = 200Hz to 100KHz Output Voltage Noise eN IOUT = 250mA COUT = 4.7µF, C(SR) = 0.47µF Enable Bar High (Shutdown) VENB(HI) Enable High (Enabled) VEN(HI) 1.4 VIN VIN = 2.5V to 5.5V V Enable Bar Low (Enabled) VENB(LO) Enable Low (Shutdown) VEN(LO) Enable / Enable Bar Pin Current (Enabled) IEN / IENB ENB = 0, EN = VIN, VIN = 2.5V to 5.5V 0.1 1 µA ISHDN ENB = VIN, EN = 0, VIN = 2.5V to 5.5V 1 2 µA Shutdown Current 0 VOUT = 3.3V Start up Time Rev.A.01 TSTR C(SR) = 0.01µF RLOAD = 22Ω C(SR) = 0.1µF COUT = 10µF C(SR) = 0.22µF 0.3 20 o TA = 25 C 200 mS 450 7 AME, Inc. AME8821 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application 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. n External Capacitors The AME8821 is stable with an output capacitor to ground of 4.7µF 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 0.1µF 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 V IN. The input capacitor should be at least 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 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 1µA. 8 Rev.A.01 AME, Inc. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 Output Voltage vs Load Current Quiescent Current vs Temperature 3.310 30 IOUT = 250mA VIN = 4.3V TA = 25oC 3.300 Quiescent Current (µA) Output Voltage (V) 3.305 3.295 3.290 3.285 3.280 3.275 3.270 25 IOUT = 1mA 20 15 10 5 VIN = 4.3V 3.265 3.260 0 -40 0 15 30 45 60 75 90 105 120135150165 180195 210225 240 Load Current (mA) -10 5 20 35 50 65 80 95 110 125 Temperature (oC) Output Spectral Noise Density vs. Frequency Dropout Voltage vs. Temperature 400 400 VIN=4.3V COUT=4.7µF C(SR)=0.47µF VIN = 4.3V IOUT = 250mA 350 300 Noise (µV/√Hz) Dropout Voltage (V) -25 250 200 150 100 300 200 IOUT = 250mA 100 50 IOUT =1mA 0 -40 -25 -10 5 20 35 50 65 80 95 0 100 110 125 1000 Temperature (oC) Output Impedance vs. Frequency VIN = 4.3V COUT = 4.7µF 1.6 VIN = 4.3V VOUT = 3.3V COUT = 4.7µF C(SR) = 0.47µF 90 1.4 1.2 1.0 0.8 IOUT = 250mA 0.4 80 70 IOUT = 250mA 60 50 IOUT = 1mA 40 30 20 IOUT = 50mA 0.2 10 100 1000 10000 Frequency (Hz) Rev.A.01 Power Supply Ripple Rejection Ratio Ripple Rejection (dB) Output Impedance (Ω) 1.8 0 10 100000 100 2.0 0.6 10000 Frequency (Hz) 100000 1000000 0 10 100 1000 10000 100000 1000000 Frequency (Hz) 9 AME, Inc. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 Load Transient Response 5.3 Output Voltage (mV) 4.3 20 0 -20 300 Output Voltage Output Current (mV) (mA) Input Voltage (V) Line Transient Response VIN = 4.3V VOUT = 3.3V COUT = 4.7µF 100 0 -100 Time (20µS/Div) Output Voltage, Enable Voltage vs Time (Start-Up) 3 2 1 0 VIN = 4.3V VOUT = 3.3V IOUT = 250mA C(SR) = 0.22µF COUT = 4.7µF TA = 25℃ Output Voltage Enable Voltage (V) (V) Output Voltage Enable Voltage (V) (V) Output Voltage, Enable Voltage vs Time (Start-Up) 0 5 0 3 VIN = 4.3V VOUT = 3.3V IOUT = 250mA C(SR) = 0.01µF COUT = 4.7µF TA = 25℃ 2 1 0 Time (10mS/Div) Time (100mS/Div) Output Voltage, Enable Voltage vs Time (Start-Up) Output Voltage vs. Temperature 3.290 IOUT = 1mA 3.285 5 3.280 0 3 2 1 0 VIN = 4.3V VOUT = 3.3V IOUT = 250mA C(SR) = 0.1µF COUT = 4.7µF TA = 25℃ Time (100mS/Div) Output Voltage (V) Output Voltage Enable Voltage (V) (V) 100 0 Time (20µS/Div) 5 200 3.275 3.270 3.265 3.260 3.255 3.250 3.245 IOUT = 250mA VIN = 4.3V 3.240 3.235 -40 -25 -10 5 20 35 50 65 80 95 110 125 Temperature (oC) 10 Rev.A.01 AME, Inc. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 Stability vs ESR vs I LOAD 100 Unstable Region VIN = 4.3V VOUT = 3.3V COUT= 4.7µF ESR (Ω) 10 Stable Region 1 Untested Region 0.1 0 60 90 120 150 ILOAD (mA) Rev.A.01 11 AME, Inc. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 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-25 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size 12 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT-25 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm Rev.A.01 AME, Inc. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 n Tape and Reel Dimension TSOT-25 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 TSOT-25 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm 13 AME, Inc. 250mA Hi-PSRR, Low-Quiescent LDO with In-Rush Current Control For USB Application AME8821 n Package Dimension SOT-25 Top View Side View SYMBOLS D L MIN E H MILLIMETERS θ1 S1 1.20REF A 0.0472REF 0.15 0.0000 0.0059 b 0.30 0.55 0.0118 0.0217 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 1.90 BSC e θ1 S1 2.60 0.07480 BSC 3.00 0.37BSC 0 o 10 0.10236 0.11811 0.0146BSC o 0o 10 o 0.95BSC 0.0374BSC MILLIMETERS INCHES A1 A MAX 0.00 L Front View MIN A1 H e MAX INCHES b TSOT-25 Top View Side View D SYMBOLS MAX MIN MAX A+A1 0.90 1.25 0.0354 0.0492 b 0.30 0.50 0.0118 0.0197 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 E H L MIN θ1 S1 e H e L θ1 Front View 2.40 3.00 0.35BSC 0o 10 o 0.95BSC 0.07480 BSC 0.09449 0.11811 0.0138BSC 0o 10 o 0.0374BSC b 14 A1 A S1 1.90 BSC Rev.A.01 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: 1009-DS8821-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. 95054-2438 Tel : (408) 988-2388 Fax: 886 2 2659-2989 Fax: (408) 988-2489