L4946B Datasheet | STMicroelectronics

DESCRIPTION The L4946B is a quad output low drop voltage regulator. The four outputs are a low drop 10V at 125m A (VO1), a 8.5V at 250m A (VO2), a 5V at 200m A (VO3) and a low drop 5V st-by line at 100m A (VO4). The IC includes a monitoring circuit to warn if a low voltage or no voltage condition is occurring. VO1,2,3 are off during st-by mode. BLOCK DIAGRAM MULTIPOWER BCD TECHNOLOGY Multiwatt 11 ORDERING NUMBER: L4946B The STCAP pin allows the battery voltage to decay slowly giving the µP time to store data. This IC is designed for supplying microputer controlled systems specially in automotive applications. 125m A 8.5V 250m A 200m A June 2000 1/9 L4946 OPERATING CONDITION Symbol VS IL Supply Voltage Load Current IO1 IO2 IO3 IO4 Parameter Value -13.5 to 26.5 300 400 600 100 Unit V m A m A m A m A ABSOLUTE MAXIMUM RATINGS Symbol VS VI VO Tstg Tj Supply Voltage Input Voltage (ON/OFF) Output Voltage (LVW, Reset) Storage Temperature Range Junction Temperature Range Load Dump (5ms rise, 115ms decay) Parameter Value -35 to 60 0 to 5 0 to 5 -65 to 150 max 150 60 Unit V V V °C °C V PIN CONNECTION APPLICATION CIRCUIT 0.1u F L4946 THERMAL DATA Symbol Rth j-case 2/9 Parameter Thermal Resistance Junction-case max Value 2 Unit °C/W L4946 ELECTRICAL CHARACTERISTICS (VS = 10.5 to 16V; I O1 = 6m A, IO2 = 8m A, IO3 = 4m A; IO4 = 0.4m A; CO = 10µF max; Tamb = -40 to 85°C, unless otherwise specified.) Symbol V O1 ∆VO1 IQ VS-VO1 Parameter Output Voltage Load Regulation Quiescent Current ( ∆IS) Dropout Voltage Test Condition IO1 = 125m A; 11V < VS < 16V IO1 = 5 to 125m A VS = 14V; IO1 = 5m A; VS =14V ; IO1 = 125m A; IO1 = 125m A T amb = 25°C all temps 150 Tamb = 25°C; all temps Min. 9.7 9.5 Typ. 10 10 Max. 10.3 10.5 150 10 18 400 600 300 11 2 9.7 9.5 9.7 9.5 -0.4 50 d B 50 d B 10 10 10 10 10.3 10.5 10.3 10.5 1 Unit V V m V m A m A m V m V m A V V V V V V V ΙL V O1 Current Limit (Foldback) note1 Max Bat.Trans. VO1 = 0V R O = 100Ω Ramp VS from 14 to 60V in 3-5ms Hold V S at 60V for 10ms...