AME, Inc. AME8841 n General Description 600mA CMOS LDO n Functional Block Diagram The AME8841 linear regulator features low quiescent current (30µA typ.) with low dropout voltage, making it ideal for battery applications. The space-saving SO-8 package is attractive for "Pocket? and "Hand Held" applications. IN OUT Overcurrent Shutdown These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the "Worst" of operating conditions. Thermal Shutdown EN The AME8841 is stable with an output capacitance of 2.2µF or greater. R1 AMP n Features R2 Vref =1.215V l Very Low Dropout Voltage GND l Guaranteed 600mA Output l Accurate to within 1.5% l 30µA Quiescent Current l Over-Temperature Shutdown l Current Limiting n Typical Application l Short Circuit Current Fold-back l Power-Saving Shutdown Mode l Space-Saving SO-8 Package l Many fixed output voltages available l Low Temperature Coefficient IN IN OUT OUT AME8841 l All AME's Lead Free Products Meet RoHS Standards GND EN 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 l Electronic Scales 1 AME, Inc. AME8841 600mA CMOS LDO n Pin Configuration SO-8 Top View 8 7 6 5 AME8841 1. OUT 2. IN AME8841 3. GND 4. OUT 5. NC 6. NC 1 2 3 4 7. EN 8. NC * Die Attach: Non-Conductive Epoxy n Ordering Information AME8841 x x x x x Special Feature Number of Pins Package Type Operating Ambient Temperature Range Product Grade or Option Product Grade or Option A: B: C: D: E: F: G: H: I: J: K: L: M: N: O: P: Q: R: S: U: V: W: Y: Z: 2 3.3V 3.0V 2.8V 2.5V 3.8V 3.6V 3.5V 2.7V 3.4V 2.85V 3.7V 1.5V 1.8V 2.9V 3.1V 4.1V 4.75V 2.65V 5.0V 3.2V 3.15V 2.3V 1.9V 1.7V 1: 2: 3: 4: 1.3V 2.0V 4.2V 4.0V Operating Ambient Temperature Range E: -40 O C to 85 O C Package Type H: SO-8 Number of Pins A: 8 Special Feature Z: Lead Free AME, Inc. AME8841 600mA CMOS LDO n Ordering Information (contd.) Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME8841AEHA 8841 AEHA yyww 3.3V SO-8 - 40oC to + 85oC AME8841AEHAZ 8841 AEHA yyww 3.3V SO-8 - 40oC to + 85oC AME8841BEHA 8841 BEHA yyww 3.0V SO-8 - 40oC to + 85oC AME8841BEHAZ 8841 BEHA yyww 3.0V SO-8 - 40oC to + 85oC AME8841CEHA 8841 CEHA yyww 2.8V SO-8 - 40oC to + 85oC 2.8V SO-8 - 40oC to + 85oC 2.5V SO-8 - 40oC to + 85oC AME8841CEHAZ AME8841DEHA 8841 CEHA yyww 8841 DEHA yyww AME8841DEHAZ 8841 DEHA yyww 2.5V SO-8 - 40oC to + 85oC AME8841EEHA 8841 EEHA yyww 3.8V SO-8 - 40oC to + 85oC AME8841EEHAZ 8841 EEHA yyww 3.8V SO-8 - 40oC to + 85oC AME8841FEHA 8841 FEHA yyww 3.6V SO-8 - 40oC to + 85oC AME8841FEHAZ 8841 FEHA yyww 3.6V SO-8 - 40oC to + 85oC Note: yyww represents the date code * A line on top of the first character represents lead free plating such as 8841 Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type. 3 AME, Inc. AME8841 600mA CMOS LDO n Ordering Information (contd.) 4 Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME8841GEHA 8841 GEHA yyww 3.5V SO-8 - 40oC to + 85oC AME8841GEHAZ 8841 GEHA yyww 3.5V SO-8 - 40oC to + 85oC AME8841HEHA 8841 HEHA yyww 2.7V SO-8 - 40oC to + 85oC AME8841HEHAZ 8841 HEHA yyww 2.7V SO-8 - 40oC to + 85oC AME8841IEHA 8841 IEHA yyww 3.4V SO-8 - 40oC to + 85oC AME8841IEHAZ 8841 IEHA yyww 3.4V SO-8 - 40oC to + 85oC AME8841JEHA 8841 JEHA yyww 2.85V SO-8 - 40oC to + 85oC AME8841JEHAZ 8841 JEHA yyww 2.85V SO-8 - 40oC to + 85oC AME8841KEHA 8841 KEHA yyww 3.7V SO-8 - 40oC to + 85oC AME8841KEHAZ 8841 KEHA yyww 3.7V SO-8 - 40oC to + 85oC AME8841LEHA 8841 LEHA yyww 1.5V SO-8 - 40oC to + 85oC AME8841LEHAZ 8841 LEHA yyww 1.5V SO-8 - 40oC to + 85oC AME, Inc. AME8841 600mA CMOS LDO n Ordering Information Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME8841MEHA 8841 MEHA yyww 1.8V SO-8 - 40oC to + 85oC AME8841MEHAZ 8841 MEHA yyww 1.8V SO-8 - 40oC to + 85oC AME8841NEHA 8841 NEHA yyww 2.9V SO-8 - 40oC to + 85oC AME8841NEHAZ 8841 NEHA yyww 2.9V SO-8 - 40oC to + 85oC AME8841OEHA 8841 OEHA yyww 3.1V SO-8 - 40oC to + 85oC AME8841OEHAZ 8841 OEHA yyww 3.1V SO-8 - 40oC to + 85oC AME8841REHA 8841 REHA yyww 2.65V SO-8 - 40oC to + 85oC AME8841REHAZ 8841 REHA yyww 2.65V SO-8 - 40oC to + 85oC 5 AME, Inc. AME8841 600mA CMOS LDO n Absolute Maximum Ratings Parameter Maximum Unit 8 V PD / (VIN - VO) A GND - 0.3 to VIN + 0.3 V Input Voltage Output Current 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 C Junction Temperature Range TJ - 40 to +125 o C n Thermal Information Parameter Unit Maximum Junction Temperature 150 o C Solder Iron(10 Sec)* 350 o C * MIL-STD-202G 210F 6 Maximum AME, Inc. AME8841 600mA 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 Note 1 7 V -1.5 1.5 % 1.3V<=VO(NOM) <=1.4V Dropout Voltage VDROPOUT IO=600mA 1.4V<VO(NOM) <=2.0V VO=VO(NOM) -2.0% 2.0V<VO(NOM) <=2.8V 1900 See 1400 chart 800 2.8V<VO(NOM) Output Current Units mV 600 IO VO>1.2V 600 Current Limit ILIM VO>1.2V 600 Short Circuit Current ISC VO<0.8V 300 600 mA Quiescent Current IQ IO=0mA 30 50 µA Ground Pin Current IGND IO=1mA to 600mA 30 50 µA Line Regulation Load Regulation Over Temperature Shutdown Over Temperature Hysterisis VO Temperature Coefficient Power Supply Rejection Output Voltage Noise EN Input Threshold EN Input Bias Current Shutdown Supply Current REGLINE REGLOAD mA 800 mA 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 VO >= 4.0V -0.4 0.2 0.4 -1 0.2 1 IO=1mA to 600mA % % 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 mVrms VEH VIN =2.7V to 7V 2.0 Vin V VEL VIN =2.7V to 7V 0 0.4 V IEH VEN =VIN , VIN =2.7V to 7V 0.1 µA IEL VEN =0V, VIN =2.7V to 7V 0.5 µA ISD VIN =5V, VO=0V, VEN <VEL 1 µA 0.5 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. 7 AME, Inc. AME8841 600mA CMOS LDO n Detailed Description n Enable The AME8841 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, and thermal shutdown. The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1µA. This pin behaves much like an electronic switch. 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 600mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 110oC. The AME8841 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The AME8841 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 AME8841 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. 8 AME, Inc. AME8841 600mA CMOS LDO Ground Current vs. Input Voltage Load Step (1mA-600mA) 45 Vo(10mV/DIV) 85 OC 35 30 25 O Output C L=2.2µF CIN=2.2µF 25 C 20 IL (200mA/DIV) Ground Current (µ A) 40 15 10 5 0 0 1 2 3 4 5 6 7 I Load 0 8 Input Voltage (V) TIME (20mS/DIV) Drop Out Voltage vs. Output Voltage Power Supply Rejection Ratio 0 1200 ILOAD=600mA 800 600 400 100mA CL=2.2µF Tantalum Tantalum C BYP=0 -20 PSRR (dB) Drop Out Voltage (mV) -10 1000 -30 -40 -50 10mA 100mA -60 200 -70 100 µ A 100 µ A 1mA -80 0 1 2 3 4 5 10 6 Output Voltage (V) 1K 100K 10M Frequency (Hz) Safe Operating Area Noise Measurement 600 8841AEHA Vo (1mV DIV) Output Current (mA) 8807AEHA 100 10 0.1 1.0 Input-Output Voltage Differential (V) C L=2.2µF No Filter 8.0 TIME (20ms/DIV) 9 AME, Inc. AME8841 600mA CMOS LDO Current Limit Response I OUT (200mA/DIV) V OUT (1V/DIV) Overtemperature Shutdown 0 0 C LOAD =2.2µF C IN=1.0µF RLOAD=3.3Ω VOUTNOM =3.3V IOUT (200mA/DIV) VOUT (1V/DIV) R LOAD=6.6 Ω TIME (0.5Sec/DIV) TIME (2mS/DIV) Enable (2V/DIV) Chip Enable Transient Response C L=2µF R L=10Ω 0 Output (1V/DIV) C LOAD=2.2µF C IN=1µF R LOAD <100mΩ VOUT (1V/DIV) IOUT (200mV/DIV) Short Circuit Response 0 TIME (1mS/DIV) TIME (2mS/DIV) Line Transient Response Quiescent Current vs. Temp. 38 C LOAD=2.2µF ILOAD =1mA VOUTDC=3.3V VINDC=4.5V 36 34 32 30 28 26 TIME (200mS/DIV) 10 Quiescent Current (uA) VOUT (10mV/DIV) V IN (1V/DIV) 40 -20 0 20 40 Temperature ( o C) 60 80 AME, Inc. AME8841 600mA CMOS LDO Shut Down Current vs. Temp. 0.65 -0.25 0.60 Shut Down Current (uA) EN pin LO bias current (uA) EN pin vs. Temp. -0.20 -0.30 -0.35 -0.40 -0.45 -0.50 -20 0.55 0.50 0.45 0.40 0.35 0.30 0 20 40 60 80 -20 0 Temperature (oC) Dropout Voltage vs. Temp. 60 80 (oC) Vout vs. Temp. 2.660 480 2.655 Vout @ Vin=Vout+2V (V) Dropout Voltage @ 600mA (mV) 40 Temperature 500 460 440 420 400 380 360 -20 20 2.650 2.645 2.640 2.635 2.630 2.625 0 20 40 60 80 2.620 -20 0 20 40 60 80 Temperature (oC) Temperature (oC) Load Regulation vs. Temp. Load Regulation (%) 0.55 0.50 0.45 0.40 0.35 0.30 -20 0 20 40 60 80 Temperature (o C) 11 AME, Inc. AME8841 600mA CMOS LDO n Tape and Reel Dimension SO-8 P PIN 1 W Carrier Tape, Number of Components Per Reel and Reel Size 12 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SO-8 12.0±0.1 mm 4.0±0.1 mm 2500pcs 330±1 mm AME, Inc. AME8841 600mA CMOS LDO n Package Dimension SO-8 Top View SYMBOLS Side View C D L θ Front View e MAX MIN MAX A 1.35 1.75 0.05315 0.0689 A1 0.10 0.25 0.00394 0.00984 A 1.473 REF 0.058 REF B 0.33 0.51 0.01299 0.02008 C 0.19 0.25 0.00748 0.00984 D 4.80 5.00 0.18898 0.19685 E 3.80 4.00 0.14961 0.15748 1.27 BSC e 0.050 BSC L 0.40 1.27 0.01575 0.05 y - 0.10 - 0.004 θ 0 o 8 o 0 o 8 o A1 A2 7o(4X) INCHES MIN A2 E MILLIMETERS B 13 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. , March 2006 Document: 2006/2095-DS8841-H.01 Corporate Headquarter U.S.A. (Subsidiary) AME, Inc. Analog Microelectronics, Inc. 2F, NO. 302 Rui-Guang Road, Nei-Hu Dist. Taipei 114 Taiwan. Tel : 886 2 2627-8687 Fax: 886 2 2659-2989 3100 De La Cruz Blvd. Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489