L5955

L5955 Multiple multifunction voltage regulator for car radio Features ■ 2 stand-by regulators: 3.3V (125mA) 1.5V (300mA) 6 regulators: 10V (40mA) 8.5V (200mA) 3.3V (850mA) 8/10V (1A) 5/3.3/1.8V (200mA) 1.8/2.5V(200mA) All regulators are low dropout outputs The different outputs voltage are controlled by I2C Bus. Reg3 on/off controlled by enable Reg1, Reg2, Reg4, Reg5, Reg6 on/off controlled by I2CBus. 3 high side drivers: 2A (HSD1) 0.45A (HSD2 & HSD3) No external charge pump capacitors are required Stand-by mode controlled by EN pin for I2C Bus and Reg1, Reg2, Reg3, Reg4, Reg5, Reg6, HSD1, HSD2, HSD3 LVW function externally selectable Individual thermal shutdown Device summary Order code L5955 Package Flexiwatt27 Packing Tube ■ ■ ■ ■ Flexiwatt27 ■ ■ ■ ■ ■ Independent current limiting Short circuit protection Load dump protection and overvoltage shutdown Description The L5955 is an integration of three high side drivers, six regulators and two stand-by regulators with RESET function developed to provide the power to a complete audio system. The outputs of the IC are controlled by I2C bus and Enable pin. The device is equipped with sequencing and slew rate controls for the st-by regulators. ■ ■ ■ ■ Table 1. August 2007 Rev 1 1/17 www.st.com 17 Contents L5955 Contents 1 2 Block and pin connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 2.2 2.3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 3.2 3.3 Write mode: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Chip address byte: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Data byte: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4 5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2/17 L5955 Block and pin connection diagrams 1 Block and pin connection diagrams Figure 1. Block diagram Vstby1 Vstby2 VBAT1 ST-By REG 3.3V BG1 VSTBY1 VSTBY2 BANDGAP VBG CSLEW VBAT3_1/2 MRST* MRSTDLY SDA SCL EN LVWIN LVW* HSD1 HSD2 HSD3 VBAT2 CSLEW And BG2 Sequencing St_By REG 1.5V 10V Linear Regulator 8.5V Linear Regulator Standby Regulators POR Logic Vstby1 Vstby2 REG1 REG2 I2C Interface 3.3V Linear Regulator Low Voltage Warning VBAT1 VBG REG3 8V Linear Regulator 10V selectable 5V Linear Regulator 1.8-3.3V selectable 1.8V Linear Regulator 2.5V selectable REG4 REG5 REG6 GND PGND High Side Driver High Side Driver High Side Driver Figure 2. Pin connection (top view) 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 TAB2 REG4 VBAT3_2 REG3 VBAT2 REG6 SCL STBY2 VBAT1 STBY1 MRST REG5 MRSTDLY GND LVW REG1 LVW_IN REG2 Cslew HSD3 EN HSD2 VBAT3_1 HSD1 PGND SDA TAB1 D04AU1548 3/17 Electrical specification L5955 2 2.1 Electrical specification Absolute maximum ratings Table 2. Symbol VS1, VS2, VS3_1, VS3_2 VS1, VS2, VS3_1, VS3_2 VS1,2,3_1,3 _2,ovs Absolute maximum ratings Parameter Value Unit DC operating supply voltage 0.6 to 26.5 V Transient supply over voltages, rise time = 10ms delay time = 115ms 34 V Overvoltage shutdown Input voltages (EN, SDA, SCL, LVW, MRST, MRSTDLY, CSLEW) Output control voltage Operating temperature range Storage temperature range 27 -0.6 to 5.5 -0.6 to 18 -40 to 85 -40 to 150 V V V °C °C Vin Vout Top Tstg 2.2 Thermal data Table 3. Symbol Rth j-case Thermal data Parameter Thermal resistance junction to case Value 1 Unit °C/W 4/17 L5955 Electrical specification 2.3 Table 4. Electrical characteristics Electrical characteristics (Refer to the application circuit, Vbat =Vbat1+Vbat2+Vbat3= 14V, IST-BY1 = 0.5mA, IST-BY2 = 0.5mA, IREG1 = IREG2 = IREG3 = IREG4 = IREG5 = IREG6 = 5mA, RHSD1 = RHSD2 = RHSD3 = 16Ω) Parameter Test condition Vbat = 14V, EN = 0. IST-BY1 = Istby2=100uA, IQ(Vbat)=Ivbat1+Ivabt2+Ivbat3 Vbat = 14V, EN=VSTBY1 Istby1=125mA Istby2=300mA IREG1 = 40mA IREG2 = 200mA, IREG3 = 850mA IREG4 = 1A, IREG5 = 250mA IREG6 = 200mA, IHSD1 = 2A IHSD2,3 = 450mA Vbat = 14V; 5V