L4948

® L4948 QUAD VOLTAGE REGULATOR WITH INHIBIT AND RESET 4 OUTPUTS: 10V (300mA); 8V (400mA); 5V (600mA); 5V (100mA) ALL FOUR OUTPUTS ARE LOW DROP 5V (100mA) ST-BY OUTPUT VOLTAGE EARLY WARNING OUTPUT FOR SUPPLY UNDERVOLTAGE (LVW) THERMAL SHUTDOWN AND CURRENT LIMITATION (FOLDBACK) REVERSE BATTERY AND LOAD DUMP PROTECTION INHIBIT (ON/OFF) AND RESET FUNCTIONS DESCRIPTION The L4948 is a quad output low drop voltage regulator. All four outputs are low drop: 10V at 300mA (VO1), 8V at 400mA (VO2), 5V at 600mA (VO3) and a 5V st-by line at 100mA (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. The STCAP pin allows the battery voltage to deBLOCK DIAGRAM MULTIPOWER BCD TECHNOLOGY Multiwatt 11 ORDERING NUMBER: L4948 cay slowly giving the µP time to store data. This IC is designed for supplying microcomputer controlled systems specially in automotive applications. June 2000 1/9 L4948 OPERATING CONDITION Symbol VS IL Supply Voltage Load Current IO1 IO2 IO3 IO4 Parameter Value -15 to 27 300 400 600 100 Unit V mA mA mA mA 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 12 0 to 12 -65 to 150 max 150 60 Unit V V V °C °C V PIN CONNECTION APPLICATION CIRCUIT THERMAL DATA Symbol Rth j-case 2/9 Parameter Thermal Resistance Junction-case max Value 2 Unit °C/W L4948 ELECTRICAL CHARACTERISTICS (VS = 10.5 to 16V; I O1 = 6mA, IO2 = 8mA, IO3 = 4mA; IO4 = 0.4mA; CO = 10µF max; Tamb = -40 to 85°C, unless otherwise specified.) Symbol V O1 ∆VO1 IQ VS-VO1 ΙL V O1 Parameter Output Voltage Load Regulation Quiescent Current ( ∆IS) Dropout Voltage Test Condition IO1 = 300mA; Tamb = 25°C; 11V < VS < 16V all temps IO1 = 6 to 300mA VS = 14V; IO1 = 6mA; VS =14V ; IO1 = 300mA; IO1 = 300mA T amb = 25°C; all temps 360 Min. 9.7 9.5 Typ. 10 10 Max. 10.3 10.5 150 10 30 400 600 800 11 2 9.7 9.5 9.7 9.5 -0.4 50 dB 50 dB 10 10 10 10 10.3 10.5 10.3 10.5 1 Unit V V mV mA mA mV mV mA V V V V V V V 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 Ramp VS from60 to 14V in 3-5ms; Tamb = 25°C; all temps V O1 Rev. Voltage Trans. VS = -35V; t ≤ 1ms; RO = 100Ω Check VO1, Tamb = 25°C; all temps VS = -15V; R O = 100Ω fO = 1KHz; 1Vpp AC ; VS =14V IO1 = 180mA; IO2 = 200mA; IO3 = 400mA; IO4 = 40mA; fO = 10KHz; 1Vpp AC ; VS =14V IO1 = 180mA; IO2 = 200mA; IO3 = 400mA; IO4 = 40mA; V O1 Rev. Voltage . Ripple rejection ∆VO1 Line Regulation ∆VO1 across VS range Output Noise VS = 11V to 26V Check Output for AC noise using a 100KHz LP filter Check Output for AC noise using an A weighted filter (2020KHz) IO2 = 400mA; Tamb = 25°C; all temps IO2 = 8 to 400mA VS = 14V; IO2 = 8mA; VS = 14V; IO2 = 400mA; IO2 = 400mA set VS = VO2+1V; Tamb = 25°C; set VS = VO2+1.5V;all temps VO2 = 0V R O = 100Ω Ramp VS from 14 to 60V in 3-5ms Hold V S at 60V for 10ms Ramp VS from60 to 14V in 3-5ms; Tamb = 25°C; all temps 480 7.75 7.60 8 8 50 400 200 mV µV µV V O2 ∆VO2 ∆IQ VS-VO2 ΙL V O2 Output Voltage Load Regulation Quiescent Current ( ∆IS) Dropout Voltage 8.25 8.40 150 10 35 400 600 960 9 2 V V mV mA mA mV mV mA V V V V Current Limit (Foldback) note1 Max Bat.Trans. 7.75 7.60 8 8 8.25 8.40 3/9 L4948 ELECTRICAL CHARACTERISTICS (continued) Symbol V O2 Parameter Rev. Voltage Trans. Test Condition VS = -35V; R O = 100Ω t ≤ 1ms Check VO2, standard Tamb = 25°C; all temps VS = -15V; t = 30s; RO = 100Ω fO = 1KHz; 1Vpp AC ; VS =14V IO1 = 180mA; IO2 = 200mA; IO3 = 400mA; IO4 = 40mA; fO = 10KHz; 1Vpp AC ; VS =14V IO1 = 180mA; IO2 = 200mA; IO3 = 400mA; IO4 = 40mA; ∆VO2 V O3 ∆VO3 ∆VO3 ∆IQ VS-VO3 Line Regulation ∆VO2 across VS range Output Voltage Line Regulation Load Regulation Quiescent Current ( ∆IS) Dropout Voltage VS = 10.5V to 26V IO3 = 600mA; Tamb = 25°C; all temps VS = 7V to 26V IO3 = 4 to 600mA VS = 14V; IO3 = 4mA; VS = 14V; IO3 = 600mA; IO3 = 600mA set VS = VO3+1V; Tamb = 25°C; set VS = VO3+1.5V;all VO3 = 0V R O = 100Ω Ramp VS from 14 to 60V in 3-5ms Hold V S at 60V for 10ms Ramp VS from60 to 14V in 3-5ms; Tamb = 25°C; all temps V O3 Rev. Voltage Trans. VS = -35V; t < 1ms; RO = 100Ω Check VO3, standard Tamb = 25°C; all temps VS = -15V; R O = 100Ω fO = 1KHz; 1Vpp AC ; VS =14V IO1 = 180mA; IO2 = 200mA; IO3 = 400mA; IO4 = 40mA; fO = 10KHz; 1Vpp AC ; VS =14V Output Noise Check Output for AC noise using a 100KHz LP filter Check Output for AC noise using an A weighted filter (2020KHz) IO4 = 100mA; Tamb = 25°C; all temps VS = 7V to 26V IO4 = 0.4 to 100mA VS = 14V; IO4 = 2mA; VS = 14V; IO4 = 100mA; IO4 = 100mA set VS = VO4+0.5V; Tamb = 25°C; set VS = VO4+0.8V;all temps VO4 = 0V 150 4.85 4.75 5 5 720 4.85 4.75 5 5 Min. 7.75 7.60 -0.4 50 Typ. 8 8 Max. 8.25 8.40 1 Unit V V V dB V O2 Rev. Voltage . Ripple rejection 50 dB 40 5.15 5.25 40 100 8 40 400 600 1440 6 2 4.85 4.75 4.85 4.75 -0.4 50 5 5 5 5 5.15 5.25 5.15 5.25 1 mV V V mV mV mA mA mV mV mA V V V V V V V dB IL V O3 Current Limit (Foldback) note 1 Max Bat.Trans. V O3 Rev. Voltage . Ripple rejection 50 400 200 dB µV µV V O4 ∆VO4 ∆VO4 ∆IQ VS-VO4 ΙL Output Voltage Line Regulation Load Regulation Quiescent Current Dropout Voltage 5.15 5.25 40 80 450 20 400 600 300 V V mV mV µA mA mV mV mA Current Limit (Foldback) note 1 4/9 L4948 ELECTRICAL CHARACTERISTICS (continued) Symbol V O4 Parameter Max Bat.Trans. Test Condition R O = 1000Ω Ramp VS from 14 to 60V in 3-5ms Hold V S at 60V for 10ms Ramp VS from60 to 14V in 3-5ms; Tamb = 25°C; all temps V O4 Rev. Voltage Trans. VS = -35V; t < 1ms; RO = 1000Ω Check VO4, standard Tamb = 25°C; all temps VS = -15V; R O = 1000Ω fO = 1KHz; 1Vpp AC ; VS =14V IO1 = 180mA; IO2 = 200mA; IO3 = 400mA; IO4 = 40mA; fO = 10KHz; 1Vpp AC ; VS =14V IO1 = 180mA; IO2 = 200mA; IO3 = 400mA; IO4 = 40mA; Output Noise Check Output for AC noise using a 100KHz LP filter Check Output for AC noise using an A weighted filter (2020KHz) VS = 14V; VIH = >2V; VS = 14V; VIL =