AME AME8755 High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO n General Description The AME8755 is highly accurate, dual channel, high PSRR, low quiescent current CMOS LDO. The AME8755 includes a reference voltage source, error amplifiers, over current limit and thermal shutdown and consumes only 70µA(typical) quiescent current at no load with both channels enabled. The EN function allows the output of each channel to be turned on and off independently. n Typical Application VOUT 2 EN2 OUT2 AME8755 VIN IN EN1 VOUT1 OUT1 GND C2 1µF C3 1µF C1 1µF n Features l Guaranteed 150mA Output l Accurate to within + 2% l 1.2V to 3.3V Factory-Preset Output l Over Current Protection l Over Temperature Shutdown l High PSRR (Typ. 70dB) l Low Quiescent Current (Typ. 70µA) l All AME's Green Products Meet RoHS Standards. n Applications l Mobile Phones l Digital Cameras l PDAs l Wireless LAN Applications Rev. A.01 1 AME High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO AME8755 n Function Block Diagram EN2 Overcurrent Limit OUT2 Bandgap Reference Thermal Shutdown IN Overcurrent Limit OUT1 EN1 GND 2 Rev. A.01 AME High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO AME8755 n Pin Configuration SOT-26 Top View SOT-26 Top View 6 5 4 AME8755-AEYxxxxxx 6 5 4 1. EN1 1. OUT1 AME8755 2. IN 3. OUT2 2. IN AME8755 5. GND 5. GND 2 3 6. EN1 * Die Attach: Conductive Epoxy Rev. A.01 3. EN2 4. OUT2 4. EN2 1 AME8755-BEYxxxxxx 1 2 3 6. OUT1 * Die Attach: Conductive Epoxy 3 AME AME8755 High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO n Pin Description Pin Name Pin Description OUT1 LDO voltage regulator output pin. It should be decoupled with a 1µF or greater value low ESR ceramic capacitor. IN 4 Input voltage pin. It should be decoupled with 1µF or greater capacitor. OUT2 LDO voltage regulator output pin. It should be decoupled with a 1µF or greater value low ESR ceramic capacitor. EN2 Enable pin. When pulled low, the PMOS pass transistor turns off OUT2, current consuming less than 1µA. GND Ground connection pin. EN1 Enable pin. When pulled low, the PMOS pass transistor turns off OUT1, current consuming less than 1µA. Rev. A.01 AME High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO AME8755 n Ordering Information AME8755 - x x x xxx xxx Output Voltage 2 Output Voltage 1 Number of Pins Package Type Pin Configuration Pin Configuration A (SOT-26) B (SOT-26) Rev. A.01 1. OUT1 2. IN 3. OUT2 4. EN2 5. GND 6. EN1 Package Type E: SOT-2X Number of Pins Y: 6 Output Voltage1 (Dual LDOs) 330: 300: 285: 280: 180: 120: 3.3V 3.0V 2.85V 2.8V 1.8V 1.2V Output Voltage2 (Dual LDOs) 330: 300: 285: 280: 180: 120: 3.3V 3.0V 2.85V 2.8V 1.8V 1.2V 1. EN1 2. IN 3. EN2 4. OUT2 5. GND 6. OUT1 5 AME High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO AME8755 n Available Options Part Number Marking AME8755-AEY180280 BXHMXX AME8755-BEY180280 BYGMXX Output Voltage VOUT1=1.8V VOUT2=2.8V VOUT1=1.8V VOUT2=2.8V Package Operating Ambient Temperature Range SOT-26 -40OC to +85OC SOT-26 -40OC to +85OC Note: 1. The first 3 places represent product code. It is assigned by AME such as BXH. 2. A bar on top of first letter represents Green Part such as BXH. 3. The last 3 places MXX represent Marking Code. It contains M as date code in "month", XX as LN code and that is for AME internal use only. Please refer to date code rule section for detail information. 4. Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type. 6 Rev. A.01 AME High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO AME8755 n Absolute Maximum Ratings Parameter Maximum Unit -0.3 to +6 V Output Current PD / [2V IN -(V OUT1+VOUT2)] mA Output Voltage GND-0.3 to VIN +0.3 V Input Voltage Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. 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) Thermal Resistance (Junction to Ambient) Symbol Maximum θ JC 81 Unit o SOT-26 Conductive Epoxy Internal Power Dissipation Solder Iron (10Sec)** θJA 260 PD 400 350 C/W mW o C * Measure θJC on backside center of molding compund if IC has no tab. ** MIL-STD-202G 210F Rev. A.01 7 AME High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO AME8755 n Electrical Specifications VIN = VOUT + 1V or 2.7V, whichever is higher, where VOUT is the higher one of VOUT1(nom) and VOUT2(nom) , IOUT = 1mA, VEN = VIN and COUT = 1µF(X7R), CIN = 1µF unless otherwise noted. Typical values are at TA = 25oC. Parameter Input Voltage Symbol Test Conditions Min Typ Max Units VIN 2.7 5.5 V Output Voltage Accuracy VOUT -2 2 % Output Current IOUT Quiescent Current Dropout Voltage IQ VDROP Output Voltage Line Regulation REGLINE (Note2) 150 VEN = VIN , IOUT = 0mA IOUT=150mA mA 70 120 3.00V ≦ VOUT ≦ 3.30V 250 350 2.50V ≦ VOUT ≦ 2.95V 300 450 2.20V ≦ VOUT ≦ 2.45V 350 550 VOUT ≦2.15V Note 1 µA mV VOUT+Vdrop< VIN < 5.5V, where VOUT is the higher one of VOUT1(nom) and -0.1 0.025 0.1 %/V VOUT2(nom) Output Voltage Load Regulation (Note3) REGLOAD 1mA < IOUT < 150mA -0.005 0.0025 Output Current Limit ILIM ROUT = 1Ω 300 550 Shutdown Current ISHDN VEN = 0V, VIN(min) < VIN < VIN(max) 0.1 Power Supply Ripple Rejection PSRR f = 1kHz, IOUT = 1mA 70 Enable High (enabled) VEN(HI) VIN(min) < VIN < VIN(max) 1.4 VIN V Enable Low (shutdown) VEN(LO) VIN(min) < VIN < VIN(max) 0 0.4 V IEN VEN = VIN 0.1 1 µA TSHDN Shutdown, temperature increasing 160 TRS Restore, temperature decreasing 140 Enable Pin Current (enabled) Thermal Shutdown Temperature 0.005 %/mA mA 1 µA dB O C Note 1. For VOUT ≦ 2.15V, VDROP=2.7V-V OUT Note 2. (△ VOUT/△ VIN)*% / VOUT Note 3. (△ VOUT/VOUT)*% / △ IOUT 8 Rev. A.01 AME AME8755 High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO n Detailed Description The AME8755 contains two PMOS pass transistors, a reference voltage source, error amplifiers, over current protection, and thermal shutdown. 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. The output voltages are controlled and stabilized by a system of negative feedback. The AME8755 requires an output capacitor connected between the output and ground to stabilize the internal control loops. The minimum recommended output capacitor is 1µF. The IC's internal circuitry can be turned on and off via the signal from the EN1 and EN2 pins, for example: OUT1 is turned on when EN1 is greater than 1.4V. And OUT1 is turned off when EN1 is less than 0.4V, resulting in greatly reduced power consumption, same operation for EN2 and OUT2. The AME8755's over current limit and thermal shutdown protection prevent the IC from damaging. The internal over current protection helps protect the regulator during fault conditions. During over current protection, the output will be pulled down and source a nearly fixed amount of current that is largely independent of the output voltage. Thermal shutdown protection disables both outputs when the junction temperature of either channel rises to approximately 160oC, allowing the device to cool. When the junction temperature cools to approximately 140oC, the output circuitry is again enabled. This limits the dissipation of the regulator, protecting it from damage due to over heating. Rev. A.01 9 AME High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO AME8755 VOUT vs. Temperature 2.884 1.833 2.861 1.821 2.838 1.809 2.815 1.797 2.792 V OUT (V) V OUT (V) VOUT vs. Temperature 1.845 1.785 1.773 1.761 2.746 2.723 1.749 V OUT = 1.8V IOUT = 1mA 1.737 1.725 -40 2.769 -25 -10 +5 +20 +35 +50 +65 +80 +95 +110 +125 2.700 V OUT = 2.8V IOUT = 1mA 2.677 2.654 -40 -25 -10 +5 VDROPOUT vs. Temperature IQ vs. Temperature 120 285 110 270 100 255 90 240 80 225 210 195 V OUT = 2.8V IOUT = 150mA 165 IOUT=150mA 70 60 -25 -10 +5 +20 +35 +50 +65 +80 +95 +110 +125 40 30 20 -40 o -25 - 10 +5 +20 +35 + 50 +65 o +80 +95 +110 +125 Temperature ( C) Temperature ( C) Line Transient Response Line Transient Response VIN = 2.8V~5.5V I OUT = 1mA VOUT = 1.8V TIME (400µSec/DIV) VO UT (20mA/DIV) VIN (1V/DIV) VI N (1V/DIV) VOUT (20mA/DIV) I OUT =1mA 50 180 10 +35 +50 +65 +80 +95 +110 +125 Temperature (o C) 300 150 -40 +20 Temperature ( C) I Q (µA) VDROPOUT (V) o VIN = 3.8V~5.5V I OUT = 1mA V OUT = 2.8V TIME (400µSec/DIV) Rev. A.01 AME High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO AME8755 Load Transient Response I L (50mA/DIV) IL (50mA/DIV) VIN (100mV/DIV) VIN (100mV/DIV) Load Transient Response TIME (40µSec/DIV) V IN = 2.8V VOUT = 1.8V I OUT = 1mA~150mA TIME (40µSec/DIV) VIN =3.8V VOUT = 2.8V IOUT = 1mA~150mA Power Supply Rejection Ratio Power Supply Rejection Ratio 100 90 80 100 V IN = 3.8V V OUT = 1.8V 90 IOUT =1mA 80 PSRR (dB) PSRR (dB) IOUT =10mA 60 50 40 IOUT =30mA 50 40 I OUT=30mA 20 IOUT=100mA 10 10 0 1K 10K Frequency (Hz) Rev. A.01 IOUT =10mA 60 30 I OUT=100mA 20 0 IOUT =1mA 70 70 30 V IN = 3.8V VOUT = 2.8V 100K 1M 1K 10K 100K 1M Frequency (Hz) 11 AME High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO AME8755 n Date Code Rule Month Code 1: January 7: July 2: February 8: August 3: March 9: September 4: April A: October 5: May B: November 6: June C: December A A A A A A A A A A A A A A A A A A A A Marking A M A M A M A M A M A M A M A M A M A M X X X X X X X X X X X X X X X X X X X X Year xxx0 xxx1 xxx2 xxx3 xxx4 xxx5 xxx6 xxx7 xxx8 xxx9 n Tape and Reel Dimension SOT-26 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-26 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm Rev. A.01 AME High PSRR, Low Quiescent Current, 150mA Dual CMOS LDO AME8755 n Package Dimension SOT-26 Top View Side View θ1 E H D e L PIN 1 SYMBOLS MILLIMETERS MIN MAX MIN MAX A 0.90 1.30 0.0354 0.0512 A1 0.00 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 H S1 2.60 θ1 3.00 0 o 0.0146BSC o 10 0.95BSC 0.10236 0.11811 0 o 10 o 0.0374BSC A1 A S1 0.07480 BSC 0.37BSC L Front View INCHES b Rev. A.01 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. , February 2009 Document: 1263-DS8755-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