BCT2057ELT33-TR

BCT2057 1A, Low Dropout, Linear Regulators BCT2057 1A Low Dropout Linear Regulators GENERAL DESCRIPTION FEATURES The BCT2057 series low-power, low-noise, low-dropout, CMOS linear voltage regulators operate from a 1.6V to 5.5V 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 BCT2057 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 1.8A typical.  Wide Input Voltage Range: 1.6V to 5.5V  Fixed Outputs of 0.8V,0.9V,1.0V,1.05V,1.1V,1.2V,1.3V,1.35,1. 5V,1.8V,2.2V,2.5V,2.8V,3.0V 3.3V and 3.6V  1A Current Rating  Adjustable Output from 0.8V to 5.0V  Low Dropout Voltage  Output Current Limit  Quick output discharge  Thermal-Overload Protection  High PSRR(60dB at 1kHz)  -40°C to 85°C Operating Temperature Range  Green SOT23-5 or DFN2x2-6L 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 0.8V to 5.0V. Other features include a low shutdown current, fold-back current limit and thermal shutdown protection. The BCT2057 is available in Green SOT23-5 or DFN2x2-6L 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 REV1.5 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 1 BCT2057 1A, Low Dropout, Linear Regulators ORDERING INFORMATION Order Number VOUT(V) BCT2057EUK08-TR BCT2057EUK09-TR Package Temperature 0.8 Type SOT23-5 Range -40°C to +85°C 0.9 SOT23-5 -40°C to +85°C Marking QTY/Reel G8XX 3000 G9XX 3000 BCT2057EUK10-TR 1.0 SOT23-5 -40°C to +85°C G0XX 3000 BCT2057EUK1A-TR 1.05 SOT23-5 -40°C to +85°C GAXX 3000 BCT2057EUK11-TR 1.1 SOT23-5 -40°C to +85°C G1XX 3000 BCT2057EUK12-TR 1.2 SOT23-5 -40°C to +85°C G2XX 3000 BCT2057EUK13-TR 1.3 SOT23-5 -40°C to +85°C G3XX 3000 BCT2057EUK1B-TR 1.35 SOT23-5 -40°C to +85°C GBXX 3000 BCT2057EUK15-TR 1.5 SOT23-5 -40°C to +85°C G5XX 3000 BCT2057EUK18-TR 1.8 SOT23-5 -40°C to +85°C G8XX 3000 3000 BCT2057EUK22-TR 2.2 SOT23-5 -40°C to +85°C _ G2XX BCT2057EUK25-TR 2.5 SOT23-5 -40°C to +85°C _ G5XX 3000 BCT2057EUK28-TR 2.8 SOT23-5 -40°C to +85°C _ G8XX 3000 BCT2057EUK30-TR 3.0 SOT23-5 -40°C to +85°C G0XX 3000 BCT2057EUK33-TR 3.3 SOT23-5 -40°C to +85°C G3XX 3000 BCT2057EUK36-TR 3.6 SOT23-5 -40°C to +85°C G6XX 3000 BCT2057EUKAJ-TR ADJ SOT23-5 -40°C to +85°C GJXX 3000 BCT2057ELT08-TR 0.8 DFN2x2-6L -40°C to +85°C G8XX 3000 BCT2057ELT09-TR 0.9 DFN2x2-6L -40°C to +85°C G9XX 3000 BCT2057ELT10-TR 1.0 DFN2x2-6L -40°C to +85°C G0XX 3000 BCT2057ELT1A-TR 1.05 DFN2x2-6L -40°C to +85°C GAXX 3000 BCT2057ELT11-TR 1.1 DFN2x2-6L -40°C to +85°C G1XX 3000 BCT2057ELT12-TR 1.2 DFN2x2-6L -40°C to +85°C G2XX 3000 BCT2057ELT13-TR 1.3 DFN2x2-6L -40°C to +85°C G3XX 3000 BCT2057ELT1B-TR 1.35 DFN2x2-6L -40°C to +85°C GBXX 3000 BCT2057ELT15-TR 1.5 DFN2x2-6L -40°C to +85°C G5XX 3000 BCT2057ELT18-TR 1.8 DFN2x2-6L -40°C to +85°C G8XX 3000 3000 BCT2057ELT22-TR 2.2 DFN2x2-6L -40°C to +85°C _ G2XX BCT2057ELT25-TR 2.5 DFN2x2-6L -40°C to +85°C _ G5XX 3000 BCT2057ELT28-TR 2.8 DFN2x2-6L -40°C to +85°C _ G8XX 3000 BCT2057ELT30-TR 3.0 DFN2x2-6L -40°C to +85°C G0XX 3000 BCT2057ELT33-TR 3.3 DFN2x2-6L -40°C to +85°C G3XX 3000 BCT2057ELT36-TR 3.6 DFN2x2-6L -40°C to +85°C G6XX 3000 BCT2057ELTAJ-TR ADJ DFN2x2-6L -40°C to +85°C GJXX 3000 REV1.5 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 2 BCT2057 1A, Low Dropout, Linear Regulators ORDER NUMBER BCT2057 X XX XX -TR Tape and Reel Output Voltages: 08:0.8V 09:0.9V 10:1.0V 1A:1.05V 11:1.1V 12:1.2V 13:1.3V 1B:1.35V 15:1.5V 18:1.8V 22:2.2V 25:2.5V 28:2.8V 30:3.0V 33:3.3V 36:3.6V AJ:ADJ Package Type: UK: SOT23-5 LT: DFN2x2-6L Operating Temperature Range: E: -40℃ to +85℃ MARKING DESCRIPTION GVXX G: Product code. V: Output Voltage Code. 8:0.8V, 9:0.9V,0:1.0V, A:1.05V, 1:1.1V, 2:1.2V, 3:1.3V, B:1.35V, 5:1.5V, 8:1.8V, 2:2.2V, 5:2.5V, 8:2.8V,0:3.0V, 3:3.3V, 6:3.6V, J:ADJ. XX: Batch code. REV1.5 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 3 BCT2057 1A, Low Dropout, Linear Regulators PIN CONFIGURATION SOT23-5 TOP VIEW 1 GND 2 EN 3 5 OUT MARKING IN DFN2x2-6L TOP VIEW 4 ADJ OUT 1 ADJ 2 GND 3 0 6 IN 5 NC 4 EN PIN DESCRIPTION PIN NAME FUNCTION SOT23-5 DFN2x2-6L 1 6 IN 2 3 GND 3 4 EN Enable pin, active high. 4 2 ADJ Output voltage adjust pin.(NC when fixed output ) 5 1 OUT Regulator Output. - 0 GND Ground, Thermal pin. - 5 NC Regulator Input. Ground No connect. TYPICAL APPLICATION CIRCUIT INPUT VIN VOUT CIN 4.7uF OUTPUT COUT 4.7uF INPUT CIN 4.7uF ENABLE EN COUT 4.7uF BCT2057 ADJ BCT2057 ENABLE OUTPUT VOUT VIN EN R1 GND ADJ GND R2 REV1.5 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 4 BCT2057 1A, Low Dropout, Linear Regulators 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℃ installation procedures can cause damage. ESD damage SOT23-5......................................................................0.5W can range from subtle performance degradation to DFN2x2-6L..................................................................0.9W complete device failure. Precision integrated circuits may Package Thermal Resistance be more susceptible to damage because very small SOT23-5, θJA.........................................................260℃/W parametric changes could cause the device not to meet its DFN2x2-6L, θJA.....................................................140°C/W published specifications. Junction Temperature................................................150℃ Operating Temperature Range....................-40℃ to +85℃ Broadchip reserves the right to make any change in circuit Storage Temperature Range.......................-65℃ to 150℃ design, specification or other related things if necessary Lead Temperature (Soldering, 10 sec).......................260℃ without notice at any time. Please contact Broadchip sales ESD Susceptibility HBM............................................4000V office to get the latest datasheet. NOTE: 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 indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. REV1.5 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 5 BCT2057 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) IOUT=1mA (1) VIN=1.6V or (VOUT+0.5V) Output Voltage Accuracy Maximum Output Current (1) Current Limit ILIM (1) Short-Circuit Current Ground Pin Current 1.6 5.5 V -2.0 2.0 % 1 A A ISHORT VIN=1.6V or (VOUT+0.5V) 0.6 A No load, EN=2V Dropout Voltage(2) IOUT=1A ΔVLNR ΔVLDR 30 VOUT ＜ 1.2V 0.65 1.2V ≤VOUT ＜ 2.5V 0.35 VOUT ≥ 2.5V 0.22 VOUT ＜ 1.2V 1 1.2V ≤VOUT ＜ 2.5V 0.55 VOUT ≥ 2.5V 0.35 VIN=1.6V or (VOUT+0.5V) to 5.5V, 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 ILOAD=50mA, PSRR COUT=4.7uF, VIN=VOUT+1V Power Supply Rejection Ratio MAX UNITS 1.8 IOUT=600mA Load Regulation TYP VIN=1.6V or (VOUT+0.5V) IQ Line Regulation(1) MIN 100 uA V %/V %/mA f=217Hz 65 f=1kHz 60 dB SHUTDWON(3) VIH EN Input Threshold VIL VIN=1.6V to 5.5V, VEN=-0.3V to VIN 1.5 0.3 V EN Input Bias Current IB(SHDN) EN=0V or EN=VIN 0.01 1 uA Shutdown Supply Current IQ(SHDN) EN=0.4V 0.01 1 uA (4) Shutdown Exit Delay COUT=4.7uF, No Load 30 us TSHDN 150 °C ΔTSHDN 15 °C THERMAL PROTECTION Thermal Shutdown Temperature Thermal Shutdown Hysteresis NOTES: 1. VIN = VOUT (NOMINAL) + 0.5V or 1.6V, whichever is greater. 2. The dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of nominal VOUT. REV1.5 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 6 BCT2057 1A, Low Dropout, Linear Regulators 3. VEN = -0.3V to VIN 4. Time needed for VOUT to reach 90% of final value. APPLICATION NOTE Enable Function The BCT2057 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 BCT2057 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 BCT2057. 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 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 BCT2032, 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 (θ JA is layout dependent) for SOT23-5 package is 260°C/W, DFN2x2-6L package is 140°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)/140 = 893mW (DFN2x2-6L) PD(MAX) = (150°C−25°C)/260 = 481mW (SOT23-5) REV1.5 www.broadchip.com Copyright © BROADCHIP TECHNOLOGY CO., LTD 7 BCT2057 1A, Low Dropout, Linear Regulators 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 BCT2057 under a set of specific conditions. In this example let the Input voltage VIN=3.3V, the output current Io=1000mA 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 BCT2057 can be calculated as: PD = (3.3V−2.8V) ×1000mA+3.3V×100uA =500.33mW And the junction temperature, TJ, can be calculated as follows: TJ=TA+PD×θJA=40°C+0.5W×140°C/W(DFN2x2-6L) =40°C+70°C=110°C