BL7805 3-Terminal 1.2A Positive Voltage Regulator GENERAL DESCRIPTION The BL7805 series of three-terminal positive regulator are available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.2A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. FEATURE • • • • • Output Current up to 1.2A Thermal Overload Protection Short Circuit Protection Output Transistor Safe Operating Area Protection Output Voltages : 5V PIN CONNECTIONS BLOCK DIAGRAM Shanghai Belling Corp., Ltd. Rev. 1.2 www.belling.com.cn 1/6 BL7805 ABSOLUTE MAXIMUM RATINGS (Ta=25°°C) Characteristics Symbol Value Units Input Voltage Vi 35 V Operating Junction Temperature TJ 150 °C TSTG -65~+150 °C Storage Temperature Range BL7805 ELECTRICAL CHARACTERISTICS (refer to the test circuits, TJ = -20 to 125°C, VI = 10V,IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF unless otherwise specified). Parameter Output Voltage Line Regulation Load Regulation Symbol VO ΔVO ΔVO Test Condition MIN TYP MAX TJ = +25℃ 4.8 5 5.25 4.65 5 5.35 3 50 1 25 IO = 5mA to 1A, PO ≤ 15W VI = 8V to20V TJ = +25℃ VI = 7V to 25V TJ = +25℃ VI = 8V to 12V TJ = +25℃ IO = 5mA to 1.2A TJ = +25℃ IO = 250mA to 750mA UNIT V mV 100 mV 25 Quiescent Current IQ TJ = +25℃ 6 Quiescent Current Change ΔIQ IO = 5mA to 1A 0.5 VI = 14.5V to 30V 0.8 Quiescent Current Change ΔVo/ΔT IO = 5mA Ripple Rejection RR f=120Hz Vi=8V to 18V Dropout Voltage VDrop Io=1A, TJ=+25°C 2.2 Short Circuit Current ISC TJ = +25°C, VI = 35V 0.75 mA mA mV/℃ 0.6 62 dB V 1.2 A APPLICATION CIRCUIT Shanghai Belling Corp., Ltd. Rev. 1.2 www.belling.com.cn 2/6 BL7805 Notes: (1) A common ground is required between the input and the Output voltage. The input voltage must remain typically 2.2V above the output voltage even during the low point on the input ripple voltage. (2) Ci is required if regulator is located an appreciable distance from power Supply filter. (3) Co improves stability and transient response. Shanghai Belling Corp., Ltd. Rev. 1.2 www.belling.com.cn 3/6 BL7805 Typical Characteristics Figure 1: Dropout Voltage vs Junction Temperature Shanghai Belling Corp., Ltd. Figure 2: Peak Output Current vs Input/output Differential Voltage Rev. 1.2 www.belling.com.cn 4/6 BL7805 Figure3: Supply Voltage Rejection vs Frequency Figure 4: Quiescent Current vs Junction Temperature Figure 5: Output Voltage vs Junction Temperature Figure 6: Load Transient Response Figure 7: Output Impedance vs Frequency Figure 8: Line Transient Response Shanghai Belling Corp., Ltd. Rev. 1.2 www.belling.com.cn 5/6 BL7805 Figure 9: Quiescent Current vs Input Voltage OUTLINE DRAWING TO-220 MECHANICAL DATA Shanghai Belling Corp., Ltd. Rev. 1.2 www.belling.com.cn 6/6