TPPM0310 DC-DC STEP DOWN VOLTAGE REGULATOR SLVS369 – MARCH 2001 D Wide Input Range, 8 V to 30 V D Fixed Frequency Internal Oscillator, D D 275 kHz ±3% (Max) Tolerance on Output Over Line and Load Conditions 300 mA Load Current Capability Over Input Voltage Range D Efficiency Greater Than 86% D Thermal Shutdown and Current Limit D D Protection Programmable System Output Voltage (S1 and S2) Low Standby Mode Quiescent Current description The TPPM0310 requires a minimum of external standard filter components to regulate the desired output voltage. This is achieved with an internal oscillator frequency of 250 kHz (typical). The switch mode and associated circuitry provide efficient regulation with a low quiescent current. In the power up mode, when S1 and S2 are no connects, the device has an internal pullup on both of these inputs (S1 and S2). This ensures the device and its associated circuitry to regulate the output to 3.3 V. The enable input has an internal pullup to ensure that the device is enabled on power up sequencing. By applying <0.8 V to the ENABLE input, the device is disabled. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 2001, Texas Instruments Incorporated PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 PRODUCT PREVIEW The TPPM0310 is a power distribution and management device designed primarily for either motherboard or PCI card 1394a host applications where the power bus for internal 1394 PHY and/or LINK is required. The TPPM0310 is a switch mode regulated output power source configured for use in 1394a system. The step-down (Buck) regulated voltage is designed for applications that require ≤5 V with load current ≤300 mA (see Output Voltage Selection Table). The output switch (VSW) is fully protected by having over-current limit and thermal shutdown features. TPPM0310 DC-DC STEP DOWN VOLTAGE REGULATOR SLVS369 – MARCH 2001 functional block diagram VIN VSW Current Limit and Thermal Shutdown FB Internal Regulator ENABLE Error Amplifier Control and Pre-Drive for Switch Mode Regulator + _ Set Point OSC GND PRODUCT PREVIEW Set Point Decoding S1 1.25 V Reference CB S2 Table 1. Output Voltage Selection S1 S2 SYSTEM OUTPUT VOLTAGE (V) No connection No connection 3.3 0 0 1.3 No connection 0 1.8 0 No connection 5 Terminal Functions TERMINAL NAME NO. I/O DESCRIPTION CB TBD I Capacitor bootstrap ENABLE TBD I Enable on/off FB TBD I Feedback for regulation set point GND TBD I Ground S1 TBD I Select input 1 (internal pullup) S2 TBD I Select input 2 (internal pullup) VIN VSW TBD I Unregulated input voltage TBD O Switch output voltage 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPPM0310 DC-DC STEP DOWN VOLTAGE REGULATOR SLVS369 – MARCH 2001 absolute maximum ratings, TA = –5°C to 70°C (unless otherwise noted)† Unregulated input voltage, VIN (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V Switch output voltage, VSW (see Notes 1 and 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V Enable, Select1, and Select2 voltages, V(ENABLE), V(S1), V(S2) (see Notes 1 and 2) . . . . . . . . . . . . . . . . 6 V Boost input voltage, V(CB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 V Feedback input voltage, V(FB) (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 V Continuous power dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TBD W Electrostatic discharge susceptibility, V(HBMESD)(see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV Operating ambient temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –5°C to 70°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C Operating junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 150°C Lead temperature TLEAD), (soldering, 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C PRODUCT PREVIEW † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values are with respect to GND. 2. Absolute negative voltage values on these terminals should not be below –0.5 V. 3. Absolute negative voltage values on these terminals should not be below –1 V. 4. The human body model is a 100-pF capacitor discharged through a 1.5-kW resistor into each terminal. APPLICATION INFORMATION 10 nF L µH VSW CB D1 3.3 V OUT C µF PHY and Link VIN S1 TPPM0310 100 µF S2 GND FB ENABLE ON OFF layout guidelines D D D D The heavy lines must be kept short and connected to the ground plane construction for efficient results. The feedback trace (wire) should be kept from the inductor flux. The capacitor C should have a low ESR to minimize output voltage ripple. The diode D1 should have a low forward drop voltage at the rated load current. For better performance and efficiency, it is recommended that D1 be a Schottky diode. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 TPPM0310 DC-DC STEP DOWN VOLTAGE REGULATOR SLVS369 – MARCH 2001 MECHANICAL DATA D (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PINS SHOWN 0.050 (1,27) 0.020 (0,51) 0.014 (0,35) 14 0.010 (0,25) M 8 0.008 (0,20) NOM 0.244 (6,20) 0.228 (5,80) 0.157 (4,00) 0.150 (3,81) Gage Plane PRODUCT PREVIEW 0.010 (0,25) 1 7 0°–ā8° A 0.044 (1,12) 0.016 (0,40) Seating Plane 0.069 (1,75) MAX 0.010 (0,25) 0.004 (0,10) PINS ** 0.004 (0,10) 8 14 16 A MAX 0.197 (5,00) 0.344 (8,75) 0.394 (10,00) A MIN 0.189 (4,80) 0.337 (8,55) 0.386 (9,80) DIM 4040047 / D 10/96 NOTES: A. B. C. D. 4 All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15). 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Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations and notices. Representation or reproduction of this information with alteration voids all warranties provided for an associated TI product or service, is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use. Resale of TI’s products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service, is an unfair and deceptive business practice, and TI is not responsible nor liable for any such use. Also see: Standard Terms and Conditions of Sale for Semiconductor Products. www.ti.com/sc/docs/stdterms.htm Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright 2001, Texas Instruments Incorporated