L4946

® L4946 QUAD VOLTAGE REGULATOR WITH INHIBIT AND RESET 4 OUTPUTS: 10V (125mA); 8V (250mA); 5V (200mA); 5V (100mA) 10V AND 5V (100mA) OUTPUT 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 L4946 is a quad output low drop voltage regulator. The four outputs are a low drop 10V at 125mA (VO1), a 8V at 250mA (VO2), a 5V at 200mA (VO3) and a low drop 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. BLOCK DIAGRAM MULTIPOWER BCD TECHNOLOGY Multiwatt 11 ORDERING NUMBER: L4946 The STCAP pin allows the battery voltage to decay slowly giving the µP time to store data. This IC is designed for supplying microcomputer controlled systems specially in automotive applications. L4946 125mA 250mA 200mA 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 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 5 0 to 5 -65 to 150 max 150 60 Unit V V V °C °C V PIN CONNECTION APPLICATION CIRCUIT 0.1uF 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 = 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 Parameter Output Voltage Load Regulation Quiescent Current ( ∆IS) Dropout Voltage Test Condition IO1 = 125mA; 11V < VS < 16V IO1 = 5 to 125mA VS = 14V; IO1 = 5mA; VS =14V ; IO1 = 125mA; IO1 = 125mA 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 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 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 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 = 120-10KHz; 1Vpp AC ; VS =14V IO1 = 90mA; IO2 = 125mA; IO3 = 75mA; IO4 = 50mA; fO = 20-20KHz; 1Vpp AC ; VS =14V IO1 = 90mA; IO2 = 125mA; IO3 = 75mA; IO4 = 50mA; V O1 Rev. Voltage . Ripple rejection (by design only) ∆VO1 V O2 ∆VO2 ∆IQ VS-VO2 Line Regulation ∆VO1 across VS range Output Voltage Load Regulation Quiescent Current ( ∆IS) Dropout Voltage VS = 11V to 26V IO2 = 250mA; Tamb = 25°C; all temps IO2 = 5 to 250mA VS = 14V; IO2 = 5mA; VS = 14V; IO2 = 250mA; IO2 = 250mA T amb = 25°C all temps 300 7.75 7.60 8 8 50 8.25 8.40 150 10 35 400 600 600 9 2 7.85 7.60 8 8 8.15 8.20 mV V V mV mA mA mV mV mA V V V V ΙL V O2 Current Limit (note1) Max Bat.Trans. 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 V O2 Rev. Voltage Trans. VS = -35V; t < 1ms; RO = 100Ω Check VO2, standard Tamb = 25°C all temps VS = -15V; t = 30s; RO = 100Ω 7.85 7.80 -0.4 8 8 8.15 8.20 1 V V V V O2 Rev. Voltage . 3/9 L4946 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Ripple rejection Test Condition fO = 120-10KHz; 1Vpp AC ; VS =14V IO1 = 90mA; IO2 = 125mA; IO3 = 75mA; IO4 = 50mA; fO = 20-20KHz; 1Vpp AC ; VS =14V IO1 = 90mA; IO2 = 125mA; IO3 = 75mA; IO4 = 50mA; VS = 10.5V to 26V Check output for AC noise using A weighted filter (2020KHz) Check output for AC noise using 100kHz LP (20-100KHz) IO3 =200mA; Tamb = 25°C; all temps VS = 7V to 26V IO3 = 5 to 200mA VS = 14V; IO3 = 5mA; VS = 14V; IO3 = 200mA; IO3 = 200mA Tamb = 25°C; all temps IO3 = 5mA set VS = VO3+0.3V; Tamb = 25°C; set VS = VO3+0.4V;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 VS = -35V; t < 1ms; RO = 100Ω Check VO3, standard Tamb = 25°C; all temps VS = -15V; R O = 100Ω fO = 120-10KHz; 1Vpp AC ; VS =14V IO1 = 90mA; IO2 = 125mA; IO3 = 75mA; IO4 = 50mA; fO = 10KHz; 1Vpp AC ; VS =14V 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 = 0.5 to 100mA VS = 14V; IO4 = 2mA; VS = 14V; IO4 = 100mA; IO4 = 100mA T amb = 25°C all temps VO4 = 0V Min. 50 Typ. Max. Unit dB 50 dB ∆VO2 Line Regulation ∆VO2 across VS range Output Noise (design only) 40 200 mV µV µV V V mV mV mA mA mV mV mV mV mA V V V V V V V dB 400 4.85 4.75 5 5 5.15 5.25 40 100 10 25 400 600 400 500 480 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 V O3 ∆VO3 ∆VO3 ∆IQ VS-VO3 Output Voltage Line Regulation Load Regulation Quiescent Current ( ∆IS) Dropout Voltage IL V O3 Current Limit note 1 Max Bat.Trans. 240 V O3 Rev. Voltage Trans. V O3 Rev. Voltage . Ripple rejection 50 400 200 Output Noise dB µV µV V O4 ∆VO4 ∆VO4 ∆IQ VS-VO4 ΙL Output Voltage Line Regulation Load Regulation Quiescent Current Dropout Voltage 4.85 4.75 5 5 5.15 5.25 40 80 500 20 400 600 300 V V mV mV µA mA mV mV mA Current Limit (note 1) 120 4/9 L4946 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 = 90mA; IO2 = 125mA; IO3 = 75mA; IO4 = 50mA; fO = 10KHz; 1Vpp AC ; VS =14V IO1 = 90mA; IO2 = 125mA; IO3 = 75mA; IO4 = 50mA; Output Noise (design only) Check output for AC noise using A weighted filter (2020KHz) Check output for AC noise using 100kHz LP (20-100KHz) ON/OFF VI ON/OFF VR Input Current Input Threshold Reset Output Voltage Set VS = 14V; VIH = >2V; VS = 14V; VIL =