L5961 MOST power management device (PMD) Data Brief Features ■ 5V or 3.3V / 650mA DC-DC Converter with external sync ■ 5V or 3.3V/ 40mA standby voltage regulator ■ 5V or 3.3V / 60mA switchable voltage regulator ■ Very low quiescent current (zero power mode and ultra zero power mode feature) ■ Power management fully compatible to MOST specification PowerSSO-36 ■ Provides power supply for physical layer and control unit for the physical layer, the Network Controller and the External Host Controller of a MOST Node. ■ Switch to power pulse generator ■ Reacts on four different wake-up events – Switch to power pulse (STPP) – Light ON (for status) – Activity on Diagnostic_I/O – ON/OFF switch The L5961 also allows the implementation of a generic MOST node design that can be reproduced "as is" in any other project, thus avoiding the activities of redesign and reverification of MOST PMD compliance ■ I2C interface ■ Programmable system configuration ■ Reset generator ■ Intrinsic diagnostic transceiver (standard LIN2.0) ■ 3 battery detectors for battery voltage monitoring ■ Watchdog circuit ■ PowerSS0-36 and PowerSO-36 packages options PowerSO-36 The L5961 implements complete monitoring of the supply voltage (over-voltage, under-voltage, critical voltage), moreover it supports multiple power modes like Zeropower-mode (where one complete MOST node sinks around 25µA current) and Ultra-zero power mode (5µA). All the diagnostic protocols from major carmakers are supported and the device reacts to many different wake-up events. The L5961 is completely configurable through its I2C bus and fully compatible with MOST specifications. L5961 has been specified in cooperation with SMSC and represents a "chipset" solution when used with SMSC's MOST network interface controllers (INIC or NIC). Description The L5961 MOST PMD integrates all the discrete circuitry usually necessary to implement power supplies and power management for a MOST node. It includes intrinsic MOST specific power management together with sophisticated diagnostic and fail-safe functions. The MOST PMD is designed to provide direct power supply January 2008 Table 1. Rev 1 For further information contact your local STMicroelectronics sales office. Device summary Order code Package Packing L5961 PowerSSO-36 Tube L5961PD PowerSO-36 Tube 1/7 www.st.com 7 2/7 CSTPPC RSTPPC CV1 CV2 Load Dump Protection Filtering ON_SW DIAG_TXD DIAG_RXD DIAG_I/O STATUS V1_ADJ V1 V2 STPPC GNDSUB TAB EHC RESET DC-DC Converter 3.3/5V 650mA VS2 RSTN Control Logic L5961 I2C - Interface AD SCL Zero p ower mode supplied Normal mode supplied VCC ON-switch detector Comparators Diagnostic Transceiver 3.3/5V 40mA Reg1 5V/ 60mA Reg2 STPP Comparator VS1 UBatt_F SDA RSTPPC = 10kOhm CSTPPC = 0.1µF CV1 = CV2 =1µF (ESR<0.1Ohm) C = 470µF (5mOhm<ESR<50mOhm) L = 33 µH CCOMP = 1nF RCOMP = 0Ohm Wake-up Diagnosis UBatt GND Wake-up Diagnosis FOR FOT GND UBatt Internal 5V-power supply Watchdog INIC PS0 PS1 WDI V3EN V3SEL UZPen RSTN V3 SYNC COMP PGND V3_SW CTRL RCOMP L VCC VCC CCOMP C AC00261 External Power Supply (Option) Block and application diagram example (with INIC) L5961 1 Block and application diagram example (with INIC) Figure 1. Block and application example (with INIC) TxD RxD PWROFF INTN GND ON-switch L5961 2 Functionality details Functionality details ● ● Provides three basic states: – Zero power mode All external HW is switched off. PM-chip is switched Off except "REG1 voltage regulator", "Switch-to-power-pulse comparator" and "Control logic". – Ultra zero power mode All external HW is switched off. PM-chip is switched Off except "ON/OFF Control logic". PMD can be woken up to reach "Zero current mode" by activities on DIAG_I/O line – Normal PMD and external HW is powered. One of the four possible wake-up conditions occurs and the wake-up event is confirmed either by means of PWROFF pin or I2C bus. To confirm the on-event: - PWROFF pin must be driven low OR - the right I2C bus command is provided. Reacts on four different wake-up events – Switch to power pulse (STPP) – Light ON (for status) – Activity on Diag_I/O – ON/OFF switch ● I2C interface (allowing system programmability) ● Generation of switch to power pulse (STPP) ● Online battery monitoring, reacts on battery changes/ events: – Over voltage – Critical voltage – Under voltage ● Hardware watchdog triggered with discrete input, available to monitor the activity of the controller ● Fail-safe behavior: ● – Intrinsic filtering time of wake-up events – Protection against software caused failures – Over-temperature warning / thermal protection Diagnostic transceiver compatible to standard LIN2.0 3/7 Package information 3 L5961 Package information In order to meet environmental requirements, ST (also) offers these devices in ECOPACK® packages. ECOPACK® packages are lead-free. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Figure 2. PowerSSO-36 mechanical data and package dimensions DIM. MIN. 2.15 2.15 0 0.18 0.23 10.10 A A2 a1 b c D (1) mm TYP. 7.4 E (1) e e3 F G G1 H h k L M N O Q S T U X Y MAX. 2.47 2.40 0.075 0.36 0.32 10.50 MIN. 0.084 0.084 0 0.007 0.009 0.398 7.6 0.291 0.5 8.5 2.3 inch TYP. MAX. 0.097 0.094 0.003 0.014 0.012 0.413 OUTLINE AND MECHANICAL DATA 0.299 0.019 0.335 0.090 0.10 0.06 10.50 0.40 10.10 0.004 0.002 0.413 0.016 0.398 5˚ 5˚ 0.55 0.90 0.022 4.3 0.035 0.169 10˚ 10˚ 1.2 0.8 2.9 3.65 1.0 0.047 0.031 0.114 0.144 0.039 4.1 6.5 4.7 7.3 0.161 0.256 PowerSSO-36 (exposed pad) 0.185 0.287 A A2 (1) "D” and “E" do not include mold flash or protrusions Mold flash or protrusions shall not exceed 0.15 mm per side(0.006”) hx45 Gauge plane 0.25 c G LEAD COPLANARITY A D stand-off a1 Y k e T L E H X O F S Q U BOTTOM VIEW B 0.1 M A B b e3 7587131 A 4/7 L5961 Package information Figure 3. PowerSO-36 mechanical data and package dimensions DIM. mm MIN. TYP. A a1 inch MAX. MIN. TYP. 3.60 0.10 0.30 a2 MAX. 0.1417 0.0039 0.0118 3.30 0.1299 a3 0 0.10 b 0.22 0.38 0.0087 0.0150 c 0.23 0.32 0.0091 0.0126 D 15.80 16.00 0.6220 0.6299 D1 9.40 9.80 0.3701 0.3858 E 13.90 14.5 0.5472 0.5709 E1 10.90 11.10 0.4291 0.4370 2.90 0.1142 E2 E3 5.80 e 0.0039 0.2283 0.65 e3 0 H 15.50 h 0.8 0.2441 0.0256 11.05 G L 6.20 OUTLINE AND MECHANICAL DATA 0.4350 0.10 0.0039 15.90 0.6102 0.6260 1.10 0.0433 1.10 0.0315 N 10˚ (max) s 8˚ (max) 0.0433 PowerSO-36 Note: “D and E1” do not include mold flash or protusions. - Mold flash or protusions shall not exceed 0.15mm (0.006”) - Critical dimensions are "a3", "E" and "G". 0096119 C 5/7 Revision history 4 L5961 Revision history Table 2. 6/7 Document revision history Date Revision 21-Jan-2008 1 Changes Initial release. L5961 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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