AMC8878/8879 LOW NOISE 150mA LOW DROPOUT REGULATOR www.addmtek.com DESCRIPTION FEATURES The AMC8878/8879 series is a low noise, low dropout linear regulator operating from 2.5V to 6.5V input. An external capacitor can be connected to the bypass pin to lower the output noise level to 30µVRMS. Designed with a P-channel MOSFET output transistor, the AMC8878/8879 consume a low supply current, independent of the load current and dropout voltage. The internal thermal shut down circuit will limits the junction temperature to below 150°C. Other features include thermal protection, reverse battery protection and output current limit. Both AMC8878 and AMC8879 come in a miniature 5-pin SOT-23 package. Low output noise: 30µVRMS Industry standard’2982 pin assignment (AMC8878) Output voltage precision of ±1.4% accuracy Very low dropout voltage: 50mV/50mA and 165mV/150mA On/Off control Low IQ: 1.6µA Short circuit protection Internal thermal overload protection Available in surface mount 5-pin SOT-23 package. Enhanced pin-to-pin Compatible to the MAX8878 (AMC8878) and TK111xxS (AMC8879) series. APPLICATIONS PACKAGE PIN OUT Cellular Telephones Battery Powered Systems Hand-Held Instruments Pagers Personal Data Assistance (PDA) PCMCIA Cards VIN 1 5 VOUT GND 2 SHDN 3 5 VIN SHDN 1 GND 2 4 BP 4 VOUT BP 3 AMC8878 AMC8879 5-Pin Plastic SOT-23 Surface Mount (Top View) ORDER INFORMATION Plastic SOT-23 5-pin O O 0 C ≤ TA≤ 70 C AMC8878-X.XDBT 0OC ≤ TA≤ 70OC AMC8878-X.XDBTF(Lead Free) Temperature Range Plastic SOT-23 5-pin AMC8879-X.XDBT AMC8879-X.XDBTF(Lead Free) DBT DBT EXPANDED ORDER INFORMATION Device Name Output Voltage AMC887ڤ-1.8DBT AMC887ڤ-2.0DBT AMC887ڤ-2.5DBT AMC887ڤ-2.8DBT AMC887ڤ-2.85DBT AMC887ڤ-3.0DBT AMC887ڤ-3.2DBT AMC887ڤ-3.3DBT AMC887ڤ-5.0DBT 1.8V 2.0V 2.5V 2.8V 2.85V 3.0V 3.2V 3.3V 5.0V Copyright © 2006 ADDtek Corp. Symbolization AMC8878 AB18 AB20 AB25 AB28 AB2U AB30 AB32 AB33 AB50 1 AMC8879 AC18 AC20 AC25 AC28 AC2U AC30 AC32 AC33 AC50 DD067_G -- JUNE 2006 AMC8878/8879 TYPICAL APPLICATION VIN 2.5V to 6V VOUT CIN 1µF AMC8878 AMC8879 COUT 1µF ON OFF CBP 0.01µF ABSOLUTE MAXIMUM RATINGS (Note) 12V 150 OC -65 OC to +150 OC +260 OC 150 mW Input Voltage, VIN Operating Junction Temperature, TJ Storage Temperature Range Lead Temperature (soldering, 10 seconds) Power Dissipation, PD @ TA = 70 OC Note: Exceeding these ratings could cause damage to the device. negative out of the specified terminal. All voltages are with respect to Ground. Currents are positive into, THERMAL DATA DB PACKAGE: Thermal Resistance from Junction to Ambient, θ JA 220 OC /W Junction Temperature Calculation: TJ = TA + (PD × θ JA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. Connect the ground pin to ground using a large pad or ground plane for better heat dissipation. All of the above assume no ambient airflow. Maximum Power Calculation: – TA(MAX) T PD(MAX)= J(MAX) θJA TJ(OC): Maximum recommended junction temperature TA(OC): Ambient temperature of the application θJA(OC /W): Junction-to-junction temperature thermal resistance of the package, and other heat dissipating materials. The maximum power dissipation for a single-output regulator is : PD(MAX) = [(VIN(MAX) - VOUT(NOM))] × IOUT(NOM) + VIN(MAX) × IQ Where: VOUT(NOM) = the nominal output voltage IOUT(NOM) = the nominal output current, and IQ = the quiescent current the regulator consumes at IOUT(MAX) VIN(MAX) = the maximum input voltage Then θJA = (+150 OC – TA)/PD Copyright © 2006 ADDtek Corp. 2 DD067_G -- JUNE 2006 AMC8878/8879 BLOCK DIAGRAM VIN Reverse Battery Protection SHDN Shutdown And Power-On Control Thermal Sensor Current Limit VOUT VREF GND BP PIN DESCRIPTION Pin Number AMC8878 AMC8879 1 5 2 2 Pin Name Pin Function VIN GND Input Ground Logic control shutdown pin; HI: Device is ON, LO: Device is OFF Noise bypass pin; The output noise level can be reduced to 30µVRMS by connecting external capacitors Output 3 1 SHDN 4 3 BP 5 4 VOUT RECOMMENDED OPERATING CONDITIONS Recommended Operating Conditions Parameter Symbol Min. Typ. Max. Input Voltage VIN 2.5 6.5 Load Current IO 5 150 Input Capacitor (VIN to GND) 1.0 Output Capacitor with ESR of 10Ω max., (VOUT to GND) 1.0 Units V mA µF µF Note: 1. CIN: A 1.0 µF capacitor (or larger) should be placed between VIN to GND. 2. COUT: A 1.0 µF (or larger) capacitor is recommended between VOUT and GND for stability and improving the regulator’s transient response. The ESR (Effective Series Resistance.) of this capacitor has no effect on regulator stability, but low ESR capacitors improve high frequency transient response. The value of this capacitor may be increased without limit, but values larger than 10uF tend to increase the settling time after a step change in input voltage or output current. The part may oscillate without the capacitor. Any type of capacitor can be used, but not Aluminum electrolytics when operating below -25 OC, The capacitance may be increased without limit. Copyright © 2006 ADDtek Corp. 3 DD067_G -- JUNE 2006 AMC8878/8879 ELECTRICAL CHARACTERISTICS Unless otherwise specified, these specifications apply over the operating ambient temperature of 0°C to +70 °C with VIN = VOUT(NOMIAL) + 0.5V, and are for DC characteristics only. (Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) Parameter Symbol AMC8878/8879 Test Conditions Output Voltage Accuracy ∆VOUT Maximum Output Current IOUT Min -1.4 -3 150 Current Limit ILIMIT 160 Ground Pin Current Dropout Voltage Line Regulation Load Regulation Ripple Rejection Output Voltage Noise Shutdown Input Threshold High Shutdown Input Threshold Low IQ VDROP ∆VOI ∆VOL PSRR IOUT = 10mA, TA = +25 OC IOUT = 10 to 150mA IOUT = 10mA IOUT = 150mA IOUT = 1mA IOUT = 50mA IOUT = 150mA VIN = (VOUT + 0.1V) to 6.5V, IOUT = 1mA -0.15 IOUT = 10 to 120mA, COUT = 1µF f=100Hz, IL=100uA en f = 10Hz - 100KHz, CBP = 0.01µF VSIH VSIL VIN = 2.5V to 5.5V VIN = 2.5V to 5.5V COUT = 10µF COUT = 100µF IQ(SHDN) VOUT = 0V Shutdown Input Bias Current ISHDN VSHDN = VIN Shutdown Exit Delay tdelay CBP = 0.1µF, COUT = 1µF, No load Thermal Shutdown Temperature TSHDN Max +1.4 +2 Units % mA mA 1.6 1.7 1.1 50 165 0 0.01 50 30 20 10 µA 120 mV 0.15 0.04 %/V %/mA dB µVRMS 2.0 O Shutdown Supply Current Typ. TA = +25 C TA = +85 OC TA = +25 OC TA = +85 OC 0.01 0.2 0.01 0.5 TA = +25 OC TA = +85 OC 6 6 +150 0.4 1 100 V V µA nA ms O C Note: 1. Current limit is measured at constant junction temperature, using pulse ON time. 2. Dropout is measured at constant junction temperature, using pulse ON time, and criterion is VOUT inside target value ± 2 %. 3. Regulation is measured at constant junction temperature, using pulsed ON time. Copyright © 2006 ADDtek Corp. 4 DD067_G -- JUNE 2006 AMC8878/8879 CHARACTERIZATION CURVES VIN=VOUT(NOMINAL) + 0.5V or 2.5V(whichever is greater), CIN=1uF, COUT=1uF,CBP=0.01uF, TA=+25 OC, Using plused ON time,unless otherwise noted. Quiescent Current v.s. Output Current Output Voltage v.s. Output Current 3.5 2 Quiescent Current (µA) Output Voltage(V) VOUT=3.3V 3.4 3.3 3.2 3.1 3 2.9 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 2.8 0 20 40 60 80 100 120 0 140 25 50 75 100 125 150 Output Current (mA) Output Current (V) Output Voltage v.s. Input Voltage Quiescent Current v.s. Input Voltage IO=10mA 3.4 VOUT=3.3V Quiescent Current (µA) Output Voltage (V) 3.5 3.3 IO=150mA 3.2 3.1 2.4 2.2 2 IO=150mA 1.8 1.6 1.4 IO=10mA 1.2 3 4 4.5 5 5.5 6 1 Input Voltage (V) 4 4.5 5 5.5 6 Input Voltage (V) Output Voltage v.s. Temperature Quiescent Current v.s. Temperature Quiescent Current (µA) 2.4 3.48 VOUT=3.3V 3.44 Output Voltage (V) IO=10mA 3.4 3.36 3.32 3.28 3.24 IO=150mA 3.2 2.2 2 1.8 1.6 1.4 1.2 1 25 45 65 85 105 25 65 85 105 Temperature (OC) Temperature (OC) Copyright © 2006 ADDtek Corp. 45 5 DD067_G -- JUNE 2006 AMC8878/8879 CHARACTERIZATION CURVES (Continued)) VIN=VOUT(NOMINAL) + 0.5V or 2.5V(whichever is greater), CIN=1uF, COUT=1uF,CBP=0.01uF, TA=+25 OC, Using plused ON time,unless otherwise noted. Dropout Voltage v.s. Temperature Dropout Voltage v.s. Output Current Dropout Voltage (V) Dropout Voltage (V) 0.3 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 IO=150mA 0.25 0.2 0.15 0.1 0.05 0 0 25 50 75 100 125 150 0 25 45 Output Current (mA) 105 75mA/ Div IO COUT=1uF IO 50mV/ Div 25mA/ Div 50mV/ Div COUT=1uF VO VO Time=2ms Time=2ms Entering Shutdown, No Load 0.5V/ Div 2V/ Div VOUT=3.3V VSHDN 1V/ Div Line Transient Response, With IO=50mA 1V/ Div 85 Load Transient Response with IO=150mA Load Transient Response with IO=50mA VOUT Time=2ms Time=1ms Copyright © 2006 ADDtek Corp. 65 Temperature (OC) 6 DD067_G -- JUNE 2006 AMC8878/8879 CHARACTERIZATION CURVES (Continued)) VIN=VOUT(NOMINAL) + 0.5V or 2.5V(whichever is greater), CIN=1uF, COUT=1uF,CBP=0.01uF, TA=+25 OC, Using plused ON time,unless otherwise noted. Shutdown Exit Delay, CBP= 2pF 2V/ Div VSHDN VOUT 1V/ Div 1V/ Div 2V/ Div Shutdown Exit Delay, CBP= 0.1uF IO=50mA VOUT=3..3V Time=2ms Copyright © 2006 ADDtek Corp. VSHDN VOUT IO=50mA VOUT=3..3V Time=200µs 7 DD067_G -- JUNE 2006 AMC8878/8879 PACKAGE 5-Pin SOT-23 SEATING PLANE D INCHES b L E L1 E1 MIN TYP MAX MIN TYP MAX A - - 0.057 - - 1.45 A1 - - 0.006 - - 0.15 0.90 1.15 1.30 A2 0.035 0.045 0.051 c e MILLIMETERS L2 b 0.012 - 0.020 0.30 - 0.50 c 0.003 - 0.009 0.08 - 0.22 D 0.114 BSC 2.90 BSC E 0.110 BSC 2.80 BSC E1 0.063`BSC 1.60 BSC e 0.037 BSC 0.95 BSC e1 0.075BSC 1.90 BSC L 0.012 0.018 0.024 L1 0.024 REF 0.60 REF L2 0.010 BSC 0.25 BSC e1 GAUGE PLANE M A A2 A1 M °M Copyright © 2006 ADDtek Corp. 8 5° 10° 15° 0.30 5° 0.45 10° DD067_G -- 0.60 15° JUNE 2006 AMC8878/8879 IMPORTANT NOTICE ADDtek reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. ADDtek integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of ADDtek products in such applications is understood to be fully at the risk of the customer. In order to minimize risks associated with the customer’s applications, the customer should provide adequate design and operating safeguards. ADDtek assumes to no liability to customer product design or application support. ADDtek warrants the performance of its products to the specifications applicable at the time of sale. ADDtek Corp. 9F, No. 20, Sec. 3, Bade Rd., Taipei, Taiwan, 105 TEL: 2-25700299 FAX: 2-25700196 Copyright © 2006 ADDtek Corp. 9 DD067_G -- JUNE 2006