CBM1117C-ADJ

CBM1117X OPERATION INSTRUCTION FEATURES APPLICATIONS ● Dropout Voltage – 1.2V(Typ) ● ● Reference/Output Voltage Trimmed to ± 2% ● Maximum Input Voltage – 15V ● Adjustable Output Voltage or Fixed 1.2V, Line Regulation typically at 0.2% max ● Load Regulation typically at 0.4% max ● Current Limiting and Thermal Protection ● Standard 3-Pin Power Packages ● Operating Junction Temperature Range -40 to +125℃ ● (for CBM1117C-1.2V 0℃ to +150℃) Regulator for switching DC/DC Converter 1.25V, 1.5V, 1.8V, 2.5V, 2.85V, 3.3V, 5V ● Post ● High Efficiency Linear Regulator ● Battery Chargers ● PC Add on Card ● Motherboard clock supplies ● LCD Monitor ● Set-top Box GENERAL DESCRIPTION The CBM1117C is a series of low dropout voltage regulators which can provide up to 1A of output cur-rent. The CBM1117C is available in eight fixed voltage, 1.2, 1.25, 1.5, 1.8, 2.5, 2.85, 3.3 and 5.0V. Additionally it is also available in adjustable version. On chip precision trimming adjusts the reference/ output voltage to within ± 2%. Current limit is also trimmed to ensure specified output current and controlled short-circuit current. The CBM1117C series is available in SOT-223, TO-252, TO-263 packages. A minimum of 10uF tantalum capacitor is required at the output to improve the transient response and Stability. 1 www.corebai.com CBM1117X OPERATION INSTRUCTION TYPICAL APPLICATION Maximum ratings SYMBOL DESCRIPTION MAX UNITS Input Voltage 15 V DC Output Current PD/(VIN-VO) mA Operating Junction Temperature Range (* in case of -40 to 125 CBM1117C-(1.2) (* 0 to 150) ΘJA Thermal Resistance Junction-to-Ambient (SOT-223) 150 ℃/W ΘJA Thermal Resistance Junction-to-Ambient (TO-252) 80 ℃/W ΘJA Thermal Resistance Junction-to-Ambient (TO-220) 60 ℃/W ΘJC Thermal Resistance Junction-to-Case (SOT-223) 35 ℃/W ΘJC Thermal Resistance Junction-to-Case (TO-252) 22 ℃/W ΘJC Thermal Resistance Junction-to-Case (TO-220) 15 ℃/W VIN IOUT TJ ℃ * Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indi-cated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS 2 www.corebai.com CBM1117X OPERATION INSTRUCTION Tj = -40℃ to +125℃ ( for CBM1117C-1.2 PARAMETER Tj = 0 to +150℃) unless otherwise specified CONDITIONS MIN TYP MAX 1.176 1.200 1.224 1.225 1.250 1.280 UNIT OUTPUT VOLTAGE CBM1117C-1.2 CBM1117C-1.25 (Adjustable) Io = 10mA to 1.0A, Vin = 2.7 to 12.0V Io = 10mA to 1.0A, Vin = 2.8 to 12.0V CBM1117C-1.5 Io = 10mA to 1.0A, Vin = 3.0 to 12.0V 1.470 1.500 1.530 CBM1117C-1.8 Io = 10mA to 1.0A, Vin = 3.3 to 12.0V 1.764 1.800 1.836 CBM1117C-2.5 Io = 10mA to 1.0A, Vin = 4.0 to 12.0V 2.450 2.500 2.550 CBM1117C-2.85 Io = 10mA to 1.0A, Vin = 4.4 to 12.0V 2.790 2.850 2.910 CBM1117C-3.3 Io = 10mA to 1.0A, Vin = 4.8 to 12.0V 3.240 3.300 3.360 CBM1117C-5.0 Io = 10mA to 1.0A, Vin = 6.5 to 12.0V 4.900 5.000 5.100 2.0 7.0 mV 0.1 0.2 % V LINE REGULATION CBM1117C-1.2 CBM1117C-1.25 (Adjustable) Io =10mA, Vin = 2.7 to 12.0V Io =10mA, Vin = 2.8 to 12.0V CBM1117C-1.5 Io =10mA, Vin = 3.0 to 12.0V 2.0 7.0 mV CBM1117C-1.8 Io =10mA, Vin = 3.3 to 12.0V 2.0 7.0 mV CBM1117C-2.5 Io =10mA, Vin = 4.0 to 12.0V 2.0 7.0 mV CBM1117C-2.85 Io =10mA, Vin = 4.4 to 12.0V 2.0 7.0 mV CBM1117C-3.3 Io =10mA, Vin = 4.8 to 12.0V 3.0 7.0 mV CBM1117C-5.0 Io =10mA, Vin = 4.0 10.0 mV 3.0 10.0 mV 0.2 0.4 % 6.5 to 12.0V LOAD REGULATION CBM1117C-1.2 CBM1117C-1.25 Io = 10mA to 1.0A, Vin = 3.2V Io = 10mA to 1.0A, Vin = 3.3V CBM1117C-1.5 Io = 10mA to 1.0A, Vin = 3.5V 3.0 10.0 mV CBM1117C-1.8 Io = 10mA to 1.0A, Vin = 3.8V 3.0 10.0 mV CBM1117C-2.5 Io = 10mA to 1.0A, Vin = 4.5V 3.0 10.0 mV CBM1117C-2.85 Io = 10mA to 1.0A, Vin = 4.85V 3.0 10.0 mV CBM1117C-3.3 Io = 10mA to 1.0A, Vin = 5.3V 4.0 12.0 mV CBM1117C-5.0 Io = 10mA to 1.0A, Vin = 7.0V 5.0 15.0 mV Io =1A (Tj = 25℃) 1.20 1.30 V Io =1A 1.20 1.55 (Adjustable) DROPOUT VOLTAGE (2) All Models CURRENT LIMIT Minimum Load Current Adjustable Models (Tj = -40℃ to +125℃) Vin - Vo = 5V (Tj = 25℃) 1000 mA Vin = 13.75V 5 mA QUIESCENT CURRENT Vin - Vo = 1.5V 5.2 10 mA Adjust Pin Current Io = 10mA, Vin - Vo = 1.4 to 10V 50 120 uA Io = 10mA to 1A, Vin - Vo = 1.4 to 10V 0.5 5 uA vs Load Current, CBM1117C TEMPERATURE DRIFT Tj = -40℃ to +125℃ RMS Output Noise Bandwidth of 10Hz to 10kHz at 25℃ 0.5 % 0.003 %Vo 72 dB 120Hz input Ripple(Cadj for ADJ) =25uF Ripple Rejection Ratio Vin -Vo = 5V, Io = 1.0A 60 Tj = -40℃ to +125℃ Notes: (1) CBM1117C-X adjustable versions require a minimum load current for ±3% regulation.(2) Dropout voltage is the input voltage minus output voltage that produces a 1% decrease in utput voltage. 3 www.corebai.com CBM1117X OPERATION INSTRUCTION BLOCK DIAGRAM APPLICATION INFORMATION Fixed-Voltage Model —Basic Connections. Adjustable-Voltage Model --Basic Connections. Vo=Vref(1+R2/R1) + Iadj*R2 4 www.corebai.com CBM1117X OPERATION INSTRUCTION TYPICAL PERFOMANCE CHARACTERISTICS Dropout Voltage (VIN – V OUT) Short-Circuit Current Load Regulation CBM1117C-ADJ Ripple Rejection CBM1117C-ADJ Ripple Rejection vs Current Temperature Stability 5 www.corebai.com CBM1117X OPERATION INSTRUCTION Adjust Pin Current CBM1117C-5.0 Load Transient Response CBM1117C-5.0 Line Transient Response 6 www.corebai.com CBM1117X OPERATION INSTRUCTION Application Information Output voltage adjustment Like most regulators, the CBM1117C regulates the output by comparing the output voltage to an internally generated reference voltage. On the adjustable version as shown in Fig.4, the VREF is available externally as 1.25V between VOUT and ADJ. The voltage ratio formed by R1 and R2 should be set to conduct 10mA (minu-mum output load). The output voltage is given by the following equation: Vo=Vref(1+R2/R1)+Iadj*R2 On fixed versions of CBM1117C, the voltage divider is provided internally Figure 4. Basic Adjustable Regulator Input Bypass Capacitor An input capacitor is recommended. A 10μF tantalum on the input is a suitable input bypassing for almost all applications. Adjust Terminal Bypass Capacitor The adjust terminal can be bypassed to ground with a bypass capacitor (CADJ) to improve ripple rejection. This bypass capacitor prevents ripple from being amplified as the output voltage is increased. At any ripple frequency, the impedance of the CADJ should be less than R1 to prevent the ripple from being amplified: （2π*fRIPPLE*CADJ）