AMC7638 450mA LOW DROPOUT REGULATOR www.addmtek.com DESCRIPTION FEATURES The AMC7638 series is a low dropout regulator rated for 450mA output current. Low power consumption and high accuracy is achieved through CMOS technology and internal trimmed reference voltage. The AMC7638 series consists of a high-precision voltage reference, error correction circuit, and a current limit output driver. The fast transient response is an outstanding feature for applications with various loads APPLICATIONS PACKAGE PIN OUT CD ROM, DVD Wireless Communication Systems Digital Camera Battery Powered Applications VOLTAGE OPTIONS AMC76381-1.5 – 1.5V Fixed AMC76381-1.8 – 1.8V Fixed AMC76381-2.5 – 2.5V Fixed AMC76381-3.3 – 3.3V Fixed AMC76382-1.5 – 1.5V Fixed AMC76382-2.5 – 2.5V Fixed AMC76382-3.3 – 3.3V Fixed AMC76383-1.5 – 1.5V Fixed AMC76383-2.5 – 2.5V Fixed AMC76383-3.3 – 3.3V Fixed AMC76385-2.5 – 2.5V Fixed AMC76385-3.3 – 3.3V Fixed TA (OC) -40 to 85 Note: 2% internally trimmed output Input-Output differential of typ. 360mV at 300mA & low quiescent current of 10µA in typical P-MOS output stage with low RDS, ON. Short circuit protection Internal thermal overload protection Enhanced pin-to-pin compatible to the XC62FP series, RT9261/A. 3-Lead SOT-89 and SOT-223 packages. Lead (Pb) free process 3. VIN 2. GND 1. VOUT 3. VOUT 2. VIN 1. GND AMC76381-X.XPKF AMC76382-X.XPKF 3-Pin Plastic SOT-89 Surface Mount (Top View) 3-Pin Plastic SOT-89 Surface Mount (Top View) 3. VOUT 3. VIN 2. GND 1. VIN 2. VOUT 1. GND AMC76383-X.XSKF AMC76385-X.XSKF 3-Pin Plastic SOT-223 Surface Mount (Top View) 3-Pin Plastic SOT-223 Surface Mount (Top View) ORDER INFORMATION Plastic SOT-89 Plastic SOT-223 PK 3-pin SK 3-pin AMC76381-X.XPKF AMC76382-X.XPKF AMC76383-X.XSKF AMC76385-X.XSKF 1. All surface-mount packages are available in Tape & Reel. Append the letter “T” to part number (i.e. AMC76381-X.XPKFT, AMC76383-X.XSKFT). 2. The letter ”F” is marked for Lead Free process. Copyright © 2007 ADDtek Corp. 1 DD054_N -- MAY 2007 AMC7638 TYPICAL APPLICATION VOUT VIN AMC7638 CIN COUT 1µF 4.7µF (Note) ABSOLUTE MAXIMUM RATINGS 13V 150OC -65OC to 150OC 260OC Input Voltage, VIN Maximum Operating Junction Temperature, TJ Storage Temperature Range Lead Temperature (soldering, 10 seconds) Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. RECOMMENDED OPERATING CONDITIONS Parameter Symbol Min. VIN IO 3.0 5 0.1 1.0 -40 Input Voltage Load Current (with adequate heat sinking) Input Capacitor (VIN to GND) Output Capacitor with ESR of 10Ω max., (VOUT to GND) Operating ambient temperature range Operating junction temperature TA TJ Typ. Max. Units 300 10 500 V mA µF µF O C O C 85 125 POWER DISSIPATION TABLE Package θJA ( C/ W ) Derating factor (mW/OC ) TA ≥ 25OC TA ≤ 25OC Power rating (mW) TA=70OC Power rating (mW) TA= 85OC Power rating (mW) PK 71(Note) 14.1 1763 1128 916 Note: O TJ = TA + (PD × θJA) PD: Power dissipation. θJA: Thermal resistance from Junction to Ambient. For PK package, θJT = 35O C / W. TJ = TTAB + (PD × θJT) TTAB: Tab temperature. θJT: Thermal resistance from junction to tab of the package. The θJA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above assume no ambient airflow. Copyright © 2007 ADDtek Corp. 2 DD054_N -- MAY 2007 AMC7638 BLOCK DIAGRAM VIN Current Limiter VOUT VREF GND ELECTRICAL CHARACTERISTICS Unless otherwise specified, VIN = VOUT(TYP) + 1V, IO = 10mA, COUT = 4.7µF, TA=25 OC. (Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) Parameter Output Voltage AMC7638X-1.5 AMC7638X-1.8 AMC7638X-2.5 AMC7638X-3.3 Symbol VO Line Regulation ∆VOI Load regulation ∆VOL Dropout Voltage ∆V Ground Pin Current Current Limit Output Voltage Temperature Coefficient Copyright © 2007 ADDtek Corp. IQ ICL Test Conditions IO = 10mA Min Typ Max 1.470 1.764 2.450 3.234 1.500 1.800 2.500 3.300 0.2 1.530 1.836 2.550 3.366 0.4 30 80 180 550 300 800 400 1100 20 VIN = (VOUT + 0.5V) to 10V 10mA ≤ IO ≤100mA 10mA ≤ IO ≤ 300mA IO = 100mA VO>2.5V IO = 300mA IO = 100mA 2.0V<VO≤2.5V IO = 300mA IO = 100mA VO≤2.0V IO = 300mA IO = 10mA ~ 300mA VIN = VOUT+ 0.5V IO=100mA, -40 C ≤ TJ ≤ 125 C O 3 O 15 45 100 300 150 450 200 600 8 400 V %/V mV mV µA mA ppm/OC ±100 DD054_N Units -- MAY 2007 AMC7638 CHARACTERISTIC CURVES Load Regulation Line Regulation 3.5 3.50 AMC7638X-3.3 AMC7638X-3.3 3.45 Output Voltage (V) Output Voltage (V) 3.4 3.3 3.2 3.1 3.0 3.40 3.35 3.30 3.25 2.9 3.20 2.8 0 100 200 300 400 3.5 500 4.5 5.5 Io (mA) 7.5 8.5 9.5 10.5 Input Voltage (V) Dropout Voltage vs. Temperature 0.6 Output Voltage vs. Temperature 3.5 0.5 AMC7638X-3.3 3.4 Io=10mA 0.4 Output Voltage (V) Dropout Voltage (V) 6.5 0.3 0.2 0.1 3.3 Io=100mA 3.2 3.1 Io=300mA 3.0 2.9 Io=500mA 0 0 100 200 300 400 2.8 500 Io (mA) -40 -20 0 20 40 60 80 100 120 140 TA (oC) Dropout Voltage vs. Temperature Quiescent Current vs. Output Current 0.50 14 0.45 12 Quiescent Current (uA) Dropout Voltage 0.40 0.35 0.30 Io=300mA 0.25 0.20 0.15 10 8 6 0.10 0.05 Io=100mA -40 -20 0 20 40 60 80 100 120 4 140 0 TA (oC) Copyright © 2007 ADDtek Corp. 4 100 200 300 Io (mA) DD054_N 400 -- 500 MAY 2007 AMC7638 CHARACTERIZATION CURVES (Continued) Quiescent Current vs. Temperature Load Transient Response Output Voltage Deviation ( mV) 20 20mV/Div 18 14 12 Load current ( mA) 10 8 50mA/Div Quiescent Current (uA) 16 6 4 2 0 -40 -20 0 20 40 60 TA (oC) 80 100 Io = 50mA VIN=5V CIN = 1 uF COUT = 4.7 uF Time: 100µs/ Div 120 Io = 100mA VIN=5V CIN = 1 uF COUT = 4.7 uF Load current ( mA) 50mA/Div 20mV/Div Output Voltage Deviation ( mV) Load Transient Response Time: 100µs/ Div Copyright © 2007 ADDtek Corp. 5 DD054_N -- MAY 2007 AMC7638 APPLICATION INFORMATION The maximum power dissipation of a single-output regulator PD(MAX) = [(VIN(MAX) - VOUT(NOM))] × IOUT(NOM) + VIN(MAX) × IQ 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 Thermal consideration The AMC7638 series have internal power and thermal limiting circuitry designed to protect the device under overload conditions. However maximum junction temperature ratings should not be exceeded under continuous normal load conditions. The thermal protection circuit of AMC7638 series will prevent the device from damage due to excessive power dissipation. When the device temperature rises to approximately 150 OC, the regulator will be turned off. When power consumption is over about 775mW (SOT89 package, at TA=70 OC), additional heat sink is required to control the junction temperature below 125 OC. The junction temperature is: TJ = PD (θJT + θCS + θSA ) + TA P D:Dissipated power. θJT:Thermal resistance from the junction to the mounting tab of the package. θCS:Thermal resistance through the interface between the IC and the surface on which it is mounted. (typically, θCS < 1.0 OC /W) θSA:Thermal resistance from the mounting surface to ambient (thermal resistance of the heat sink). If PC Board copper is going to be used as a heat sink, below table can be used to determine the appropriate size of copper foil required. For multi-layered PCB, these layers can also be used as a heat sink. They can be connected with several through hole vias. PCB θSA (OC /W ) 2 PCB heat sink size (mm ) 59 45 38 33 27 24 21 500 1000 1500 2000 3000 4000 5000 Recommended figure of PCB area used as a heat sink. through hole vias (Top View) Copyright © 2007 ADDtek Corp. (Bottom View) 6 DD054_N -- MAY 2007 AMC7638 PACKAGE 3-Pin Surface Mount SOT-89 INCHES A C D L B K N E M F J G H MILLIMETERS MIN TYP MAX MIN TYP MAX A 0.173 - 0.181 4.39 - 4.59 B 0.090 - 0.102 2.28 - 2.59 C 0.055 - 0.063 1.39 - 1.60 D 0.015 - 0.017 0.38 - 0.43 E 0.084 - 0.090 2.13 - 2.28 F 0.016 - 0.019 0.33 - 0.48 G 0.059 BSC 1.49 BSC H 0.118 BSC 2.99 BSC J 0.018 - 0.022 0.45 - 0.55 K 0.155 - 0.167 3.94 - 4.24 L 0.067 - 0.072 1.70 - 1.82 M 0° - 8° 0° - 8° - 0.047 0.89 - 1.19 N 0.035 3-Pin Surface Mount SOT-223 ( SK ) D A c MILLIMETERS B1 H E K L e A1 e1 MIN TYP MAX A 1.50 1.65 1.80 A1 0.02 0.05 0.08 B 0.60 0.70 0.80 B1 2.90 - 3.15 c 0.28 0.30 0.32 D 6.30 6.50 6.70 E 3.30 3.50 3.70 e 2.3 BSC e1 4.6 BSC H B 7 7.00 7.30 L 0.91 1.00 1.10 K 1.50 1.75 2.00 α 0° 5° 10° β Copyright © 2007 ADDtek Corp. 6.70 3° DD054_N -- MAY 2007 AMC7638 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 © 2007 ADDtek Corp. 8 DD054_N -- MAY 2007