BL78A05 Positive voltage regulators 1. Features • • • • • Output current to 1.5 A Output voltage of 5V Thermal overload protection Short circuit protection Output transition SOA protection 2. Description The BL78A05 of three-terminal positive regulators is available in TO-220 package, making it useful in a wide range of applications. These regulators can provide lacal on-card regulation, eliminating the distribution problems associated with single point regulation. Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.5 A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltage and currents Block diagram 1 www.belling.com.cn Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited © 2012 Belling All Rights Reserved BL78A05 Positive voltage regulators Schematic diagram 3.Maximum ratings Absolute maximum ratings Symbol VI Parameter DC input voltage Value V O= 5 V 35 IO Output current Internally limited PD Power dissipation Internally limited TSTG Storage temperature range TOP Operating junction temperature range Note: BL78A05 Unit V -40 to 125 °C 0 to 125 °C Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. 2 www.belling.com.cn Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited © 2012 Belling All Rights Reserved BL78A05 Positive voltage regulators 4.Electrical characteristics Electrical characteristics of BL78A05 (refer to the test circuits, TJ = -40 to 125°C, V I= 11 V, IO = 500mA, C I= 0.33 µF, CO = 0.1 µF unless otherwise specified) Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage TJ = 25°C 4.85 5 5.15 V VO Output voltage IO = 5 mA to 1 A, PO ≤15 W VI = 8 to 20 V 4.65 5 5.35 V 3 50 VI = 7 to 25 V, TJ = 25°C Δ VO(1) mV Line regulation 1 VI = 8 to 12 V, TJ = 25°C IO = 5 mA to 1.5 A, TJ = 25°C Δ VO(1) 25 100 Load regulation Id Quiescent current mV IO = 250 to 750 mA, TJ = 25°C 25 TJ = 25°C 8 IO = 5 mA to 1 A Δ Id 0.5 mA Quiescent current change VI = 8 to 25 V Δ VO/ÄT Output voltage drift IO = 5 mA Output noise voltage B =10 Hz to 100 kHz, TJ = 25°C Supply voltage rejection VI = 8 to 18 V, f = 120 Hz Vd Dropout voltage IO = 1 A, TJ = 25°C RO Output resistance f = 1 kHz Isc Short circuit current VI = 35 V, TJ = 25°C Iscp Short circuit peak current TJ = 25°C eN SVR 1. mA 0.8 0.6 mV/°C 40 68 dB 2 2.5 17 1.3 0.75 1.2 A 1.9 2.2 A to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 3 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited © 2012 Belling All Rights Reserved V mÙ Load and line regulation are specified at constant junction temperature. Changes in VO due www.belling.com.cn µV/VO BL78A05 Positive voltage regulators 5. Test circuits DC parameter Load regulation Ripple rejection 4 www.belling.com.cn Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited © 2012 Belling All Rights Reserved BL78A05 Positive voltage regulators 6.Package mechanical data NOTES: A) CONFIRMS TO JEDEC TO-220 VARIATION AB EXCEPT WHERE NOTED B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS ARE EXCLUSIVE OF BURRS, MOLD FLASH, AND TIE BAR EXTRUSIONS. 5 www.belling.com.cn Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited © 2012 Belling All Rights Reserved