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| AME, Inc. AME8841 n General Description The AME8841 linear regulator features low quiescent current (30A 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. These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the "Worst" of operating conditions. EN 600mA CMOS LDO n Functional Block Diagram IN Overcurrent Shutdown OUT Thermal Shutdown The AME8841 is stable with an output capacitance of 2.2F or greater. R1 AMP n Features l Very Low Dropout Voltage l Guaranteed 600mA 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 Power-Saving Shutdown Mode l Space-Saving SO-8 Package l Many fixed output voltages available l Low Temperature Coefficient l All AME's Lead Free Products Meet RoHS Standards C1 5V IN IN OUT Vref =1.215V R2 GND n Typical Application OUT AME8841 GND EN C2 2.2F n Applications l Instrumentation l Portable Electronics l Wireless Devices l Cordless Phones l PC Peripherals l Battery Powered Widgets l Electronic Scales 1F 1 AME, Inc. AME8841 n Pin Configuration SO-8 Top View 8 7 6 5 600mA CMOS LDO AME8841 1. OUT 2. IN 3. GND 4. OUT 5. NC 6. NC AME8841 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: 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 Number of Pins A: 8 Package Type H: SO-8 Special Feature Z: Lead Free 2 AME, Inc. AME8841 n Ordering Information (contd.) Part Number AME8841AEHA 600mA CMOS LDO Marking* 8841 AEHA yyww 8841 AEHA yyww 8841 BEHA yyww 8841 BEHA yyww 8841 CEHA yyww 8841 CEHA yyww 8841 DEHA yyww 8841 DEHA yyww 8841 EEHA yyww 8841 EEHA yyww 8841 FEHA yyww 8841 FEHA yyww Output Voltage 3.3V Package SO-8 Operating Ambient Temperature Range - 40oC to + 85oC AME8841AEHAZ 3.3V SO-8 - 40oC to + 85oC AME8841BEHA 3.0V SO-8 - 40oC to + 85oC AME8841BEHAZ 3.0V SO-8 - 40oC to + 85oC AME8841CEHA 2.8V SO-8 - 40oC to + 85oC AME8841CEHAZ 2.8V SO-8 - 40oC to + 85oC AME8841DEHA 2.5V SO-8 - 40oC to + 85oC AME8841DEHAZ 2.5V SO-8 - 40oC to + 85oC AME8841EEHA 3.8V SO-8 - 40oC to + 85oC AME8841EEHAZ 3.8V SO-8 - 40oC to + 85oC AME8841FEHA 3.6V SO-8 - 40oC to + 85oC AME8841FEHAZ 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 n Ordering Information (contd.) Part Number AME8841GEHA 600mA CMOS LDO Marking* 8841 GEHA yyww 8841 GEHA yyww 8841 HEHA yyww 8841 HEHA yyww 8841 IEHA yyww 8841 IEHA yyww 8841 JEHA yyww 8841 JEHA yyww 8841 KEHA yyww 8841 KEHA yyww 8841 LEHA yyww 8841 LEHA yyww Output Voltage 3.5V Package SO-8 Operating Ambient Temperature Range - 40oC to + 85oC AME8841GEHAZ 3.5V SO-8 - 40oC to + 85oC AME8841HEHA 2.7V SO-8 - 40oC to + 85oC AME8841HEHAZ 2.7V SO-8 - 40oC to + 85oC AME8841IEHA 3.4V SO-8 - 40oC to + 85oC AME8841IEHAZ 3.4V SO-8 - 40oC to + 85oC AME8841JEHA 2.85V SO-8 - 40oC to + 85oC AME8841JEHAZ 2.85V SO-8 - 40oC to + 85oC AME8841KEHA 3.7V SO-8 - 40oC to + 85oC AME8841KEHAZ 3.7V SO-8 - 40oC to + 85oC AME8841LEHA 1.5V SO-8 - 40oC to + 85oC AME8841LEHAZ 1.5V SO-8 - 40oC to + 85oC 4 AME, Inc. AME8841 n Ordering Information Part Number AME8841MEHA 600mA CMOS LDO Marking* 8841 MEHA yyww 8841 MEHA yyww 8841 NEHA yyww 8841 NEHA yyww 8841 OEHA yyww 8841 OEHA yyww 8841 REHA yyww 8841 REHA yyww Output Voltage 1.8V Package SO-8 Operating Ambient Temperature Range - 40oC to + 85oC AME8841MEHAZ 1.8V SO-8 - 40oC to + 85oC AME8841NEHA 2.9V SO-8 - 40oC to + 85oC AME8841NEHAZ 2.9V SO-8 - 40oC to + 85oC AME8841OEHA 3.1V SO-8 - 40oC to + 85oC AME8841OEHAZ 3.1V SO-8 - 40oC to + 85oC AME8841REHA 2.65V SO-8 - 40oC to + 85oC AME8841REHAZ 2.65V SO-8 - 40oC to + 85oC 5 AME, Inc. AME8841 n Absolute Maximum Ratings Parameter Input Voltage Output Current Input, Output Voltage ESD Classification 600mA CMOS LDO Maximum 8 PD / (VIN - VO) GND - 0.3 to VIN + 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 Symbol TA TJ Rating - 40 to +85 - 40 to +125 Unit o o C C n Thermal Information Parameter Maximum Junction Temperature Solder Iron(10 Sec)* * MIL-STD-202G 210F Maximum 150 350 Unit o C C o 6 AME, Inc. AME8841 n Electrical Specifications TA = 25OC unless otherwise noted Parameter Input Voltage Output Voltage Accuracy Symbol VIN VO IO=1mA 1.3V<=VO(NOM) <=1.4V Dropout Voltage VDROPOUT IO=600mA VO=VO(NOM) -2.0% 1.4V o o 600mA CMOS LDO Test Condition Min Note 1 -1.5 Typ Max 7 1.5 1900 See 1400 chart 800 600 Units V % mV mA mA mA A A % C C ppm/oC Output Voltage Noise eN VEH VEL IEH IEL ISD EN Input Threshold VIN =2.7V to 7V VIN =2.7V to 7V VEN =VIN , VIN =2.7V to 7V VEN =0V, VIN =2.7V to 7V VIN =5V, VO=0V, VEN 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 n Detailed Description The AME8841 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current 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 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. 600mA CMOS LDO n Enable 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 1A. This pin behaves much like an electronic switch. n External Capacitors The AME8841 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. 8 AME, Inc. AME8841 Ground Current vs. Input Voltage 45 600mA CMOS LDO Load Step (1mA-600mA) Vo(10mV/DIV) 40 Ground Current ( A) 35 30 25 20 15 10 5 0 0 1 2 3 4 85 OC Output CL =2.2 =2.2 25 C IL (200mA/DIV) O I Load 0 TIME (20mS/DIV) 5 6 7 8 Input Voltage (V) Drop Out Voltage vs. Output Voltage 1200 0 -10 Power Supply Rejection Ratio Drop Out Voltage (mV) 1000 ILOAD=600mA PSRR (dB) -20 -30 -40 -50 -60 800 CL=2.2F Tantalum Tantalum C BYP=0 100mA 600 400 100mA 10mA 200 -70 -80 100 A 10 1K 100 A 100K 1mA 10M 0 1 2 3 4 5 6 Output Voltage (V) Frequency (Hz) Safe Operating Area 600 Noise Measurement 8807AEHA Output Current (mA) 8841AEHA Vo (1mV DIV) C L=2.2F No Filter 100 10 0.1 1.0 8.0 Input-Output Voltage Differential (V) TIME (20ms/DIV) 9 AME, Inc. AME8841 Overtemperature Shutdown I OUT (200mA/DIV) V OUT (1V/DIV) 600mA CMOS LDO Current Limit Response 0 IOUT (200mA/DIV) R LOAD=6.6 VOUT (1V/DIV) C LOAD =2.2F C IN=1.0F RLOAD=3.3 VOUTNOM =3.3V 0 TIME (0.5Sec/DIV) TIME (2mS/DIV) Short Circuit Response IOUT (200mV/DIV) C LOAD=2.2F C IN=1F R LOAD <100m Chip Enable Transient Response Enable (2V/DIV) C L=2F R L=10 0 VOUT (1V/DIV) Output (1V/DIV) 0 TIME (1mS/DIV) TIME (2mS/DIV) Line Transient Response 40 Quiescent Current vs. Temp. V IN (1V/DIV) 38 Quiescent Current (uA) VOUT (10mV/DIV) C LOAD=2.2F ILOAD =1mA VOUTDC=3.3V VINDC=4.5V 36 34 32 30 28 26 -20 0 20 40 60 80 TIME (200mS/DIV) Temperature ( o C) 10 AME, Inc. AME8841 EN pin vs. Temp. -0.20 0.65 0.60 0.55 0.50 0.45 0.40 0.35 0.30 0 20 40 60 80 -20 0 20 40 60 80 600mA CMOS LDO Shut Down Current vs. Temp. EN pin LO bias current (uA) -0.30 -0.35 -0.40 -0.45 -0.50 -20 Temperature (oC) Shut Down Current (uA) -0.25 Temperature (oC) Dropout Voltage vs. Temp. 500 Vout vs. Temp. 2.660 2.655 2.650 2.645 2.640 2.635 2.630 2.625 Dropout Voltage @ 600mA (mV) 460 440 420 400 380 360 -20 Vout @ Vin=Vout+2V (V) 0 20 40 60 80 480 2.620 -20 0 20 40 60 80 Temperature (oC) Temperature (oC) Load Regulation vs. Temp. 0.55 Load Regulation (%) 0.50 0.45 0.40 0.35 0.30 -20 0 20 40 60 80 Temperature (o C) 11 AME, Inc. AME8841 n Tape and Reel Dimension SO-8 P 600mA CMOS LDO PIN 1 W Carrier Tape, Number of Components Per Reel and Reel Size Package SO-8 Carrier Width (W) 12.00.1 mm Pitch (P) 4.00.1 mm Part Per Full Reel 2500pcs Reel Size 3301 mm 12 AME, Inc. AME8841 n Package Dimension SO-8 Top View Side View C 600mA CMOS LDO SYMBOLS A A1 A2 B C D MILLIMETERS MIN 1.35 0.10 INCHES MIN 0.05315 MAX 1.75 0.25 MAX 0.0689 0.00394 0.00984 0.058 REF 0.01299 0.02008 0.00748 0.00984 0.18898 0.19685 0.14961 0.15748 0.050 BSC 0.01575 0 o E 1.473 REF 0.33 0.19 4.80 3.80 0.51 0.25 5.00 4.00 D c L E e L y 1.27 BSC 0.40 0 o Front View 7o(4X) 1.27 0.10 8 o 0.05 0.004 8 o A2 B A1 e A 13 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. , March 2006 Document: 2006/2095-DS8841-H.01 Corporate Headquarter AME, Inc. 2F, NO. 302 Rui-Guang Road, Nei-Hu Dist. 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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