BCT2040EDAV33-TR

BCT2040 1A, Low Dropout, Linear Regulators BCT2040 1A Low Dropout Linear Regulators GENERAL DESCRIPTION FEATURES The BCT2040 series low-power, low-noise, low-dropout, CMOS linear voltage regulators operate from a 2.2V to 6.0V input voltage. They are the perfect choice for low voltage, low power applications. A low ground current makes this part attractive for battery operated power systems. The BCT2040 series also offer ultra-low dropout voltage to prolong battery life in portable electronics. Output current minimum limit is 1A, and over-current protection limit is set at 2A typical.  Wide Input Voltage Range: 2.2V to 6.0V  Fixed Outputs of1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V 3.3V and 5.0V  Adjustable Output from 0.8V to 5.0V  1A Current Rating  Low Dropout Voltage  Output Current Limit  Quick output discharge  Thermal-Overload Protection  High PSRR(65dB at 1kHz)  -40°C to 85°C Operating Temperature Range  Available in Green ESOP-8 Packages These devices feature a shutdown function and are offered in active low with auto discharge. The output voltage is preset to voltages in the range of 1.0V to 5.0V. Other features include a low shutdown current, fold-back current limit and thermal shutdown protection. The BCT2040 is available in Green ESOP-8 packages. It operates over an ambient temperature range of -40°C to +85°C. APPLICATIONS Cellular Telephones Cordless Telephones PCMCIA Cards Modems MP3 Player Hand-Held Instruments Portable/Battery-Powered Equipment REV1.4 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 1 BCT2040 1A, Low Dropout, Linear Regulators ORDERING INFORMATION Order Number VOUT(V) Package Type Temperature Range Marking 2040 10XXX QTY/Reel BCT2040EDAV10-TR 1.0 ESOP-8 -40°C to +85°C BCT2040EDAV12-TR 1.2 ESOP-8 -40°C to +85°C 2040 12XXX 3000 BCT2040EDAV15-TR 1.5 ESOP-8 -40°C to +85°C 2040 15XXX 3000 BCT2040EDAV18-TR 1.8 ESOP-8 -40°C to +85°C 2040 18XXX 3000 BCT2040EDAV25-TR 2.5 ESOP-8 -40°C to +85°C 2040 25XXX 3000 BCT2040EDAV28-TR 2.8 ESOP-8 -40°C to +85°C 2040 28XXX 3000 BCT2040EDAV30-TR 3.0 ESOP-8 -40°C to +85°C 2040 30XXX 3000 BCT2040EDAV33-TR 3.3 ESOP-8 -40°C to +85°C 2040 33XXX 3000 BCT2040EDAV50-TR 5.0 ESOP-8 -40°C to +85°C 2040 50XXX 3000 BCT2040EDAVAJ-TR ADJ ESOP-8 -40°C to +85°C 2040 AJXXX 3000 3000 ORDER NUMBER BCT2040 X XX VXX -TR Tape and Reel Output Voltages: V10: 1.0V V12: 1.2V V15: 1.5V V18: 1.8V V25: 2.5V V28: 2.8V V30: 3.0V V33: 3.3V V50: 5.0V VAJ: ADJ Package Type: DA: ESOP-8 Operating Temperature Range: E: -40℃ to +85℃ REV1.4 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 2 BCT2040 1A, Low Dropout, Linear Regulators MARKING DESCRIPTION 2040：Part No. VV: Output Voltage Code Code VOUT(V) 10 1.0 12 1.2 15 1.5 18 1.8 25 2.5 28 2.8 30 3.0 33 3.3 50 5.0 AJ ADJ XXX: Batch code PIN CONFIGURATION ESOP-8 TOP VIEW EN 2 NC 3 GND 4 0 GND 8 VIN VOUT 1 7 NC ADJ 2 6 NC NC 3 5 NC GND 4 MARKING 1 MARKING VOUT ESOP-8 ADJ TOP VIEW 0 GND 8 VIN 7 EN 6 NC 5 NC REV1.4 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 3 BCT2040 1A, Low Dropout, Linear Regulators PIN DESCRIPTION PIN Vxx ADJ 1 1 2 NAME VOUT FUNCTION Regulator Output. EN Enable pin, active high. 2 ADJ Output voltage adjust pin. 3 3 NC Not connected. 4 4 GND 5 5 NC Not connected. 6 6 NC Not connected. NC Not connected. 7 EN Enable pin, active high. 8 8 VIN Regulator Input. 0 0 GND Ground, Thermal pin. 7 Ground ABSOLUTE MAXIMUM RATINGS CAUTION IN to GND.......................................................-0.3V to 6.5V This integrated circuit can be damaged by ESD if you don’t EN to GND…………….......................................-0.3V to VIN pay attention to ESD protection. Broadchip recommends OUT to GND..........................................-0.3V to (VIN+0.3V) that all integrated circuits be handled with appropriate Output Short-Circuit Duration....................................Infinite precautions. Failure to observe proper handling and Power Dissipation, PD@TA=25℃ ESOP-8...............1.25W installation procedures can cause damage. ESD damage Package Thermal Resistance ESOP-8, θJA……....100℃/W can range from subtle performance degradation to Junction Temperature................................................150℃ complete device failure. Precision integrated circuits may Operating Temperature Range....................-40℃ to +85℃ be more susceptible to damage because very small Storage Temperature Range.......................-65℃ to 150℃ parametric changes could cause the device not to meet its Lead Temperature (Soldering, 10 sec).......................260℃ published specifications. ESD Susceptibility HBM............................................4000V Broadchip reserves the right to make any change in circuit NOTE: design, specification or other related things if necessary Stresses beyond those listed under “Absolute Maximum Ratings” without notice at any time. Please contact Broadchip sales may cause permanent damage to the device. These are stress office to get the latest datasheet. ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. REV1.4 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 4 BCT2040 1A, Low Dropout, Linear Regulators ELECTRICAL CHARACTERISTICS (VIN= VOUT(NOMINAL)+0.5V(1), TA = -40℃ to +85℃, unless otherwise specified.) PARAMETER SYM Input Voltage CONDITIONS VIN (1) Output Voltage Accuracy FB Reference Voltage, ADJ pin VREF (1) Maximum Output Current Current Limit ILIM (1) Short-Circuit Current 6.0 V IOUT=1mA -2.0 2.0 % IOUT=1mA 0.78 0.82 V 1 A A ISHORT VIN=2.2V or (VOUT+0.5V) 0.6 A No load, EN=2V 30 uA VOUT>2.2V, IOUT=300mA 0.1 0.2 VOUT>2.2V, IOUT=1A 0.3 0.5 Dropout Voltage(2) ΔVLNR ΔVLDR VIN=2.2V or (VOUT+0.5V) to 6V, IOUT=1mA 0.05 IOUT=1mA to 1A, COUT=4.7uF, VOUT>2V 0.002 IOUT=1mA to 1A, COUT=4.7uF, VOUT≤2V 0.004 CBP=0.1uF, ILOAD=50mA, PSRR COUT=4.7uF, VIN=VOUT+1V Power Supply Rejection Ratio 0.8 1.8 IQ Load Regulation MAX UNITS VIN=2.2V or (VOUT+0.5V) Ground Pin Current Line Regulation(1) TYP 2.2 VIN=2.2V or (VOUT+0.5V) (1) MIN V %/V %/mA f= 217Hz 65 dB 60 f=1kHz SHUTDWON(3) VIH EN Input Threshold VIL EN Input Bias Current IIN Shutdown Supply Current VIN=2.2V to 6.0V, VEN=-0.3V to VIN Shutdown Exit Delay 0.3 V EN=6.0V 1.5 uA EN=0V 0.01 uA IQ(SHDN) EN=0.4V (4) 1.5 COUT=4.7uF, No Load 0.01 1 uA 30 us TSHDN 150 °C ΔTSHDN 15 °C THERMAL PROTECTION Thermal Shutdown Temperature Thermal Shutdown Hysteresis NOTES: 1. VIN = VOUT (NOMINAL) + 0.5V or 2.5V, whichever is greater. 2. The dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of nominal VOUT. (Only applicable for VOUT > +2.2V.) 3. VEN = -0.3V to VIN 4. Time needed for VOUT to reach 90% of final value. REV1.4 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 5 BCT2040 1A, Low Dropout, Linear Regulators TYPICAL APPLICATION CIRCUIT INPUT VIN OUTPUT VOUT CIN 4.7uF COUT 4.7uF BCT2040 VXX ENABLE EN GND INPUT VIN OUTPUT VOUT CIN 4.7uF COUT 4.7uF BCT2040 ADJ ENABLE EN R1 GND ADJ R2 NOTE: VOUT = (R1 + R2)/ R2 × 0.8 V REV1.4 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 6 BCT2040 1A, Low Dropout, Linear Regulators APPLICATION NOTE Programming the BCT2040 Adjustable LDO regulator The output voltage of the BCT2040 adjustable regulator is programmed using an external resistor divider as show in Figure as below. The output voltage is calculated using equation as below: R1   VOUT= VREF × 1 +   R2  Where: VREF=0.8V typ (the internal reference voltage) Resistors R1 and R2 should be chosen for approximately 50uA divider current. Lower value resistors can be used for improved noise performance, but the solution consumes more power. Higher resistor values should be avoided as leakage current into/out of FB across R1/R2 creates an offset voltage that artificially increases/decreases the feedback voltage and thus erroneously decrease/increases VOUT. Enable Function The BCT2040 features an LDO regulator enable/disable function. To assure the LDO regulator will switch on; the EN turn on control level must be greater than 1.5 volts. The LDO regulator will go into the shutdown mode when the voltage on the EN pin falls below 0.3 volts. For to protect the system, the BCT2040 have a quick discharge function. If the enable function is not needed in a specific application, it may be tied to VIN to keep the LDO regulator in a continuously on state. Thermal Considerations Thermal protection limits power dissipation in BCT2040. When the operation junction temperature exceeds 150°C, the OTP circuit starts the thermal shutdown function turn the pass element off. The pass element turns on again after the junction temperature cools by 15°C. For continue operation, do not exceed absolute maximum operation junction temperature 150°C. The power dissipation definition in device is: PD = (VIN−VOUT) ×IOUT + VIN×IQ The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula： PD(MAX) = ( TJ(MAX) − TA ) /θJA REV1.4 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 7 BCT2040 1A, Low Dropout, Linear Regulators Where TJ(MAX) is the maximum operation junction temperature 150°C, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. For recommended operating conditions specification of BCT2040, where TJ(MAX) is the maximum junction temperature of the die (150°C) and TA is the maximum ambient temperature. The junction to ambient thermal resistance (θJA is layout dependent) for ESOP-8 package is 100°C/W, on standard JEDEC 51-3 thermal test board. The maximum power dissipation at TA= 25°C can be calculated by following formula: PD(MAX) = (150°C−25°C)/100 = 1.25W (ESOP-8) The maximum power dissipation depends on operating ambient temperature for fixed TJ(MAX) and thermal resistance θJA. It is also useful to calculate the junction of temperature of the BCT2040 under a set of specific conditions. In this example let the Input voltage VIN=3.3V, the output current Io=500mA and the case temperature TA=40°C measured by a thermal couple during operation. The power dissipation for the Vo=2.8V version of the BCT2040 can be calculated as: PD = (3.3V−2.8V) ×500mA+3.3V×100uA =250.33mW And the junction temperature, TJ, can be calculated as follows: TJ=TA+PD×θJA=40°C+0.25W×100°C/W =40°C+25°C=65°C