L4954 Quad multifunction voltage regulator for car radio Features ■ 4 regulators: – 10 V (40 mA) low dropout – 8.5 V (175 mA) – 5 V (650 mA) – 5 V (100 mA) standby ■ 3 high side drivers: – 2 A (HSD1) – 0.3 A (HSD2 & HSD3) Multiwatt15 ■ No external charge pump capacitors are required ■ Standby mode controlled by 3 input pins: – EN1 for REG1, REG2, REG3 and HSD1 – EN2 for HSD2 – EN3 for HSD3 ■ Individual thermal shutdown ■ Logic outputs for supply undervoltage: – LVWARN – Reset ■ Independent current limiting ■ Overvoltage shutdown ■ Short circuit protection ■ Load dump protection and overvoltage ■ Shutdown Table 1. July 2010 Description L4954 is a quad output voltage regulator and a three output high side driver. The IC includes monitoring circuitry to warn the microprocessor of a low voltage condition: the LVWarn, output, sensing the slow dropping of STCAP pins voltage, gives the microprocessor time to store data. A reset output is generated at REG4’s decay. External protection must be provided for reverse battery protection. Device summary Order code Package Packing L4954 Multiwatt15 Tube Doc ID 17719 Rev 1 1/13 www.st.com 1 Contents L4954 Contents 1 Block and pins connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2/13 Doc ID 17719 Rev 1 L4954 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Doc ID 17719 Rev 1 3/13 List of figures L4954 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. 4/13 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pins connection diagram (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Multiwatt15 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Doc ID 17719 Rev 1 L4954 1 Block and pins connection diagrams Block and pins connection diagrams Figure 1. Block diagram VS REG1 10V, 40mA 10V-REG1 VOLTAGE REFERENCE REG2 8.5V, 175mA 8.5V-REG2 CURRENT LIMIT REG3 5V, 650mA 5V-REG3 RESET LVW REG4 5V, 100mA 5V-REG4-STBY STCAP RESET LVWarn EN1 OUTPUT CONTROL HSD1 2.0A HSD1 EN2 THERMAL SHUTDOWN HSD2 0.3A HSD2 EN3 OVERVOLTAGE PROTECTION HSD3 0.3A HSD3 GND D95AU346 Figure 2. Pins connection diagram (top view) 15 10V REG1 14 8.5V REG2 13 5V REG3 12 EN3 11 EN2 10 EN1 9 RESET 8 GND 7 LVWarn 6 5V REG4-STBY 5 ST CAP 4 HSD3-0.3A 3 HSD2-0.3A 2 VS 1 HSD1-2A TAB CONNECTED TO PIN 8 Doc ID 17719 Rev 1 D95AU347 5/13 Electrical specifications L4954 2 Electrical specifications 2.1 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol Unit -0.6 to 26.5 V DC operating supply voltage VS Transient supply overvoltages, rise time = 10 ms ,delay time = 115 ms 34 V Overvoltage shutdown 27 V Vin Input voltages (EN1, EN2, EN3) -0.6 to 6.0 V Vout Output voltages (LVWarn, RESET) -0.6 to 6.0 V Top Operating temperature range -40 to 85 °C Tstg Storage temperature range -40 to 150 °C Thermal data Table 3. Thermal data Symbol Rth j-case 2.3 Value VS VS,ovs 2.2 Parameter Parameter Thermal resistance junction-to-case Value Unit 2 °C/W Application circuit Figure 3. Application circuit +VS 1000μF EN1 10 EN2 11 EN3 12 HSD1 1 HSD2 3 0.1μF 2 15 10V-REG1 10μF(*) 14 8.5V-REG2 10μF(*) 13 5V-REG3 10μF(*) L4954 6 5V-REG4 -STBY 10μF(*) HSD3 4 STCAP 5 47KΩ 47KΩ 7 8 LVWarn 9 470μF RESET 0.1μF 0.1μF D95AU348C (*)ESR of output capacitors should be between 0.2Ω to 5.0Ω 6/13 Doc ID 17719 Rev 1 L4954 2.4 Electrical specifications Electrical characteristics Refer to the Figure 3: Application circuit, VS = 14.4 V; Tamb = 25 °C; IOUT10 = 5 mA; IOUT8.5 = 5 mA; IOUT5 = 5 mA; IOUT5 ST-BY = 0.5 mA; RHSD1 = 16 Ω, RHSD2,3 = 107 Ω, unless otherwise specified. Table 4. Symbol VS Iq Iq,ST-BY Electrical characteristics Parameter Test condition Min. Typ. Max. Unit 11 - 16 V Operating supply voltage - Maximum quiescent current IOUT10 = 40 mA; IOUT8.5 = 175 mA; IOUT5 = 650 mA; IOUT5ST-BY = 100mA; RHSD1 = 8 Ω; RHSD2,3 = 53 Ω - 10 - mA EN1, EN2, EN3 = 0 IOUT5, ST-BY = 50 mA - 420 - mA EN1, EN2, EN3 = 0 IOUT5, ST-BY = 2 mA - 300 - mA Standby quiescent current VENL EN1, EN2, EN3 input low voltage - 0 - 0.8 V VENH EN1, EN2, EN3 input high voltage (outputs active) - 2 - 5 V 10 V / 40 mA reg 1 output VOUT10 Output voltage IOUT10 = 40 mA - 10 - V ΔVline Line regulation VS = 11 to 26 V - 2 - mV ΔVload Load regulation IOUT10 = 5 to 40 mA - 2 - mV VS = VOUT10 + 0.1 V IOUT10 = 5 mA - 100 200 mV VS = VOUT10 + 0.5 V IOUT10 = 40 mA - 500 600 mV IOUT10 = 5 mA - 7 - mA IOUT10 = 40 mA - 7 - mA VDROPOUT Dropout voltage Iq1 Reg 1 quiescent current Ilim1 Current limit - - 100 - mA Reg 1 supply voltage rejection f = 0.12 to 10 kHz; IOUT10 = 25 mA; VRIP =1 Vpp - 55 - dB SVR1 8.5V / 175 mA reg 2 output VOUT8.5 Output voltage IOUT8.5 = 175 mA - 8.5 - V ΔVline Line regulation VS = 11 to 26 V - 2 - mV ΔVload Load regulation IOUT8.5 = 5 to 175 mA - 10 - mV VS = VOUT8.5 + 0.3 V IOUT8.5 = 5 mA - 300 400 mV VS = VOUT8.5 +1 V IOUT8.5 = 175 mA - - 1.1 V VDROPOUT Dropout voltage Doc ID 17719 Rev 1 7/13 Electrical specifications Table 4. Symbol L4954 Electrical characteristics (continued) Parameter Iq2 Reg 2 quiescent current Ilim2 Current limit Test condition Min. Typ. Max. Unit IOUT8.5 = 5 mA - 7 - mA IOUT8.5 = 175 mA - 7 - mA - 300 - mA 5 V / 650 mA reg 3 output VOUT5 Output voltage IOUT5 = 650 mA - 5 - V ΔVline Line regulation VS = 7 to 26 V - 2 - mV ΔVload Load regulation IOUT5 = 5 to 650mA - 9 - mV VS = VOUT5 + 0.3 V IOUT5 = 5 mA - 300 400 mV VS = VOUT5 +1 V IOUT5 = 650mA - 1 1.1 V IOUT5 = 5 mA - 7 - mA IOUT5 = 650 mA - 7 - mA VDROPOUT Dropout voltage Iq3 Reg 3 quiescent current Ilim3 Current limit - - 1.25 - A Reg 3 supply voltage rejection f = 0.12 to 10 kHz; IOUT5 = 325 mA; VRIP =1 Vpp - 55 - dB IOUT5STBY = 100 mA - 5 - V SVR3 5V / 100 mA standby reg 4 output VOUT5STBY Output voltage ΔVline Line regulation VS = 7 to 26 V - 0.8 - mV ΔVload Load regulation Iout = 0.5 to 100 mA - 3.5 - mV VS = VREG5STBY + 0.1 V Iout5STBY = 5mA - 100 200 mV VS = VREG5STBY + 0.5 V Iout5STBY = 100 mA - 500 600 mV IOUT5STBY = 2 mA - 0.25 - mA IOUT5STBY = 100 mA - 0.35 - mA VDROPOUT Dropout voltage Iq4 Reg 4 quiescent current Ilim4 Current limit - - 190 - mA Reg 4 supply voltage rejection f = 0.12 to 10 kHz Iout5STBY = 50 mA; VRIP =1 Vpp - 55 - dB Maximum output current saturation voltage RHSD1 = 8 Ω - 600 - mV Iq Quiescent current - - 9 - mA Ilim Current limit RHSD1 = 0.5 Ω - 3.5 - A Output leakage current All driver outputs are off - 20 - mA SVR4 2 A HSD1 Vsat,peak Ileak1 8/13 Doc ID 17719 Rev 1 L4954 Table 4. Electrical specifications Electrical characteristics (continued) Symbol Parameter Test condition Min. Typ. Max. Unit 0.3 A HSD2 & HSD3 Maximum output current saturation voltage RHSD2,3 = 53 Ω - 150 - mV Iq Quiescent current - - 1.5 - mA Ilim Current limit RHSD2.3 = 0.5 Ω - 500 - mA Ileak2,3 Output leakage current All driver outputs are off - 10 - µA SVR2 Reg 1supply voltage rejection f = 0.12 to 10 kHz; IOUT8.5 = 100 mA; VRIP =1Vpp - 55 - dB - - 7.5 - V STCAP < 7.5 V; VIL = ”0” 0 - 0.4 V STCAP > 7.5 V VIH = ”1” 2.75 - 5 V - 3.9 - ms - 12.6 - µs - - 4.5 - V Set VS so that VOUT5STBY < 4.5 V; VIL = ”0” 0 - 0.4 V 2.75 - 5 V - 4.5 - ms - 37 - µs Vsat LVWARN OUTPUT THLVW LVW threshold on STCAP VLVW LVW output voltage trise LVW output rise time tfall LVW output fall time CLVW = 0.1 µF Reset output THRES VRES Reset threshold on reg 4 Reset output voltage trise Reset output rise time tfall Reset output fall time Set VS so that VOUT5STBY is not less than normal reg 4 output voltage; VIH = ”1” CRESET =0.1 µF Doc ID 17719 Rev 1 9/13 Functional description 3 L4954 Functional description The L4954 includes a monitoring circuit to warn the microprocessor if a low voltage or no voltage condition is occurring. When the voltage on the STCAP pin drops below 7.5 V (typ), the LVW output goes low. This tells the microprocessor to stop executing code and save vital information. The reset output goes low when REG4 (5 V - standby) drops below (VREG4 -250 mV) or 4.75 V is minimum value. The RESET output doesn’t go above 0.4V until REG4 has gone back above 4.75 V (min). Any spike tells the microprocessor to start operating. Once the STCAP line passes 7.5 V (typ), the LVWarn output also returns to high state. The STCAP pin acts like a delay circuit. Due to the large capacitor (470 μF), the STCAP pin allows the battery voltage to decay slowly giving the microprocessor time to store data. Also, during short low voltage or negative voltage conditions, the STCAP pin protects the 5 V standby output from dropping below the RESET and LVW trip points. The four outputs are expected to follow the battery voltage down to 11 V for REG1, 9 V for REG2, 6 V for REG3 and REG4. The L4954 has a standby mode to keep the microprocessor and memories alive during ignition off conditions. The EN1 input pin is controlled by the microprocessor. A high on the EN1 input turns on REG1, REG2, REG3, and HSD1. A Low on EN1 places the part in stand-by mode with REG4 on. The high side driver outputs HSD2 and HSD3 are controlled by EN2 and EN3 respectively: a low on the control input turns the corresponding high side driver off. Figure 4. Timing diagram 7.5 7.5 STCAP (V) TIME 0 4.75 4.75 5 REG4 (V) TIME 0 5 LVWarn (V) TIME 5 RESET (V) 0.4 D95AU349A 10/13 Doc ID 17719 Rev 1 TIME L4954 4 Package information Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Figure 5. Multiwatt15 mechanical data and package dimensions DIM. mm MIN. TYP. inch MAX. MIN. TYP. A5 MAX. 0.197 B 2.65 C 1.6 D OUTLINE AND MECHANICAL DATA 0.104 0.063 1 0.039 E 0.49 0.55 0.019 F 0.66 0.75 0.026 0.022 G 1.02 1.27 1.52 0.040 0.050 0.060 G1 17.53 17.78 18.03 0.690 0.700 0.710 H1 19.6 0.030 0.772 H2 20.2 0.795 L 21.9 22.2 22.5 0.862 0.874 0.886 L1 21.7 22.1 22.5 0.854 0.87 0.886 L2 17.65 18.1 0.695 L3 17.25 17.5 17.75 0.679 0.689 L4 10.3 10.7 10.9 0.406 0.421 L7 2.65 2.9 0.104 0.713 0.699 0.429 0.114 M 4.25 4.55 4.85 0.167 0.179 0.191 M1 4.73 5.08 5.43 0.186 0.200 0.214 S 1.9 2.6 0.075 0.102 S1 1.9 2.6 0.075 0.102 Dia1 3.65 3.85 0.144 0.152 Multiwatt15 (ver tical) 0016036 J Doc ID 17719 Rev 1 11/13 Revision history 5 L4954 Revision history Table 5. 12/13 Document revision history Date Revision 12-Jul-2010 1 Changes Initial release. Doc ID 17719 Rev 1 L4954 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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