TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 D D D D D Automatic Input Voltage Source Selection Glitch-Free Regulated Output 5-V Input Voltage Source Detector With Hysteresis 250-mA Load Current Capability With 5-V or 3.3-V Input Source Low rDS(on) Auxiliary Switch description The TPPM0304 is a low-dropout regulator with auxiliary power management that provides a constant 3.3-V supply at the output capable of driving a 250-mA load. D PACKAGE† (TOP VIEW) GND 5VAUX NC 5VCC 1 8 2 7 3 6 4 5 NC 3.3VAUX NC 3.3VOUT NC – No internal connection † This package is available taped and reeled. To order this packaging option, add an R suffix to the part number (e.g., TPPM0304DR). The TPPM0304 provides a regulated power output for systems that have multiple input sources and require a constant voltage source with a low-dropout voltage. This is a single output, multiple input, intelligent power source selection device with a low-dropout regulator for either 5VCC or 5VAUX inputs, and a low- resistance bypass switch for the 3.3VAUX input. Transitions may occur from one input supply to another without generating a glitch, outside of the specification range, on the 3.3-V output. The device has an incorporated reverse blocking scheme to prevent excess leakage from the input terminals in the event that the output voltage is greater than the input voltage. The input voltage is prioritized in the following order: 5VCC, 5VAUX, and 3.3VAUX. 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 2000, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 functional block diagram Linear Regulator With LDO 5VCC 3.3VOUT 5-V Detection Current Sensor Over Temperature Gate Drive and Control 5VAUX 5VAUX Detection Linear Regulator With LDO GND Current Sensor Gate Drive and Control Low ON Resistance Switch 3.3VAUX 3VAUX Detection Current Sensor Gate Drive 5-V Detection and Control Terminal Functions TERMINAL NAME NO. I/O DESCRIPTION 3.3VAUX 7 I 3.3-V auxiliary input 3.3VOUT 5 O 3.3-V output with a typical capacitance load of 4.7 µF 5VAUX 2 I 5-V auxiliary input 5VCC 4 I 5-V main input GND 1 I Ground 3, 6, 8 I/O NC 2 No internal connection POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 Table 1. Input Selection INPUT VOLTAGE STATUS (V) 3.3VAUX INPUT SELECTED OUTPUT (V) OUTPUT (I) 5VCC/5VAUX/3.3VAUX 3.3VOUT 5VCC 5VAUX 0 0 0 None 0 IL (mA) 0 0 0 3.3 3.3VAUX 3.3 250 0 5 0 5VAUX 3.3 250 0 5 3.3 5VAUX 3.3 250 5 0 0 5VCC 3.3 250 5 0 3.3 5VCC 3.3 250 5 5 0 5VCC 3.3 250 5 5 3.3 5VCC 3.3 250 absolute maximum ratings over operating free-air temperature (unless otherwise noted)† Supply voltage, 5-V main input, V(5VCC) (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Auxiliary voltage, 5-V input, V(5VAUX) (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Auxiliary voltage, 3.3-V input, V(3.3VAUX) (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 V 3.3-V output current limit, I(LIMIT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A Continuous power dissipation (low-K), PD (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.625 W Electrostatic discharge susceptibility, human body model, V(HBMESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV Operating ambient temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 150°C Operating junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 5°C to 120°C Lead temperature (soldering, 10 second), T(LEAD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C † 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 on these terminal should not be below –0.5 V. 3. The device derates with increase in ambient temperature, TA. See Thermal Information section. recommended operating conditions MIN TYP MAX UNIT 5-V main input, V(5VCC) 4.5 5.5 V 5-V auxiliary input, V(5VAUX) 4.5 5.5 V 3 3.6 V 5.17 µF 3.3-V auxiliary input, V(3.3VAUX) Load capacitance, CL 4.23 4.7 Load current, IL 0 250 mA Ambient temperature, TA 0 70 °C POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 electrical characteristics over recommended operating free-air temperature range, TA = 0°C to 70°C, CL = 4.7 µF (unless otherwise noted) PARAMETER TEST CONDITIONS V(5VCC)/ V(5VAUX) 5-V inputs I(Q) Quiescent supplyy current IL I(LIMIT) T(TSD)† Output load current Thys† V(3.3VOUT) Thermal hysteresis CL Load capacitance Ilkg(REV) Reverse leakage output current MIN TYP MAX 4.5 5 5.5 2.5 5 mA 250 500 µA From 5VCC or 5VAUX terminals, IL = 0 to 250 mA From 3.3VAUX terminal, IL = 0 A 0.25 Output current limit 3.3VOUT = 0 V Thermal shutdown 3 3VOUT output shorted to 0 V 3.3VOUT 3.3-V output IL = 250 mA Minimal ESR to insure stability of regulated output 2 150 180 15 3.135 3.3 3.465 V A °C V µF 4.7 Tested for input that is grounded. 3.3VAUX, 5VAUX or 5VCC = GND, 3.3VOUT = 3.3 V UNIT 50 µA † Design targets only. Not tested in production. 5-V detect PARAMETER TEST CONDITIONS MIN TYP MAX UNIT V(TO_LO) Threshold voltage, low 5VAUX or 5VCC ↓ 3.85 4.05 4.25 V V(TO_HI) Threshold voltage, high 5VAUX or 5VCC ↑ 4.1 4.3 4.5 V MIN TYP MAX auxiliary switch PARAMETER TEST CONDITIONS R(SWITCH) Auxiliary switch resistance 5VAUX = 5VCC = 0 V, 3.3VAUX = 3.3 V, IL = 150 mA ∆VO(∆VI) ∆VO(∆IO) Line regulation voltage 5VAUX or 5VCC = 4.5 V to 5.5 V Load regulation voltage 20 mA < IL < 250 mA VI – VO Dropout voltage IL < 250 mA 0.4 2 UNIT Ω mV 40 mV 1 V thermal characteristics PARAMETER RθJC RθJA MIN Thermal impedance, junction-to-case Thermal im impedance edance, junction-to-ambient MAX UNIT 39 °C/W Low-K (see Note 4) 176 High-K (see Note 4) 98 NOTE 4: See JEDEC PCB specifications for low-K and high-K. 4 TYP POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 °C/W TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 TYPICAL CHARACTERISTICS 5VCC 3.3VOUT (250mA load) Figure 1. 5VCC Cold Start 3.3VAUX 3.3VOUT (250mA load) Figure 2. 3.3VAUX Cold Start POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 TYPICAL CHARACTERISTICS 5VCC (offset = 4.5V) 5VAUX (offset = 4.8V) 3.3VOUT (offset = 3.3V) (250mA load) Figure 3. 5VCC Power Up (5VAUX = 5 V) 3.3VAUX (offset = 3.3V) 5VCC (offset = 4.5V) 3.3VOUT (offset = 3.3V) (250mA load) Figure 4. 5VCC Power Up (3.3VAUX = 3.3 V) 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 TYPICAL CHARACTERISTICS 3.3VAUX (offset = 3.3V) 5VAUX (offset = 4.5V) (250mA load) Figure 5. 5VAUX Power Up (3.3VAUX = 3.3 V) 5VCC (offset = 4.3V) 3.3VOUT (offset = 3.3V) (250mA load) Figure 6. 5VCC Power Down (3.3VAUX = 3.3 V) POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 TYPICAL CHARACTERISTICS (250mA load) 5VAUX (offset = 5V) 3.3VOUT (offset = 3.3V) 5VCC (offset = 4.5V) Figure 7. 5VCC Power Down (5VAUX = 5 V) Sample Trig? 3.3VOUT (offset = 3.3V) 250mA to 20mA step load Figure 8. 5VCC Load Transient Response Falling 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 TYPICAL CHARACTERISTICS Sample Trig? 3.3VOUT (offset = 3.3V) 20mA to 250mA step load Figure 9. 5VCC Load Transient Response Rising POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 THERMAL INFORMATION To ensure reliable operation of the device, the junction temperature of the output device must be within the safe operating area (SOA). This is achieved by having a means to dissipate the heat generated from the junction of the output structure. There are two components that contribute to thermal resistance. They consist of two paths in series. The first is the junction to case thermal resistance, RθJC; the second is the case to ambient thermal resistance, RθCA. The overall junction to ambient thermal resistance, RθJA, is determined by: RθJA = RθJC + RθCA The ability to efficiently dissipate the heat from the junction is a function of the package style and board layout incorporated in the application. The operating junction temperature is determined by the operating ambient temperature, TA, and the junction power dissipation, PJ. The junction temperature, TJ, is equal to the following thermal equation: TJ = TA + PJ (RθJC) + PJ (RθCA) TJ = TA + PJ (RθJA) This particular application uses the 8-pin SO package with standard lead frame with a dedicated ground terminal. Hence, the maximum power dissipation allowable for an operating ambient temperature of 70°C, and a maximum junction temperature of 150°C is determined as: PJ = (TJ – TA)/RθJA PJ = (150 – 70)/176 = 0.45 W when using a low-K PCB. PJ = (150 – 70)/98 = 0.81 W when using a high-K PCB. Worst case maximum power dissipation is determined by: PD = (5.5 – 3) × 0.25 = 0.625 W Normal operating maximum power dissipation is (see Figure 1): PD = (5 – 3.3) × 0.25 = 0.425 W 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 THERMAL INFORMATION Power Dissipation Derate Curve Using High-K PCB 1.275 Power – W Power Dissipation Derate Curve Using Low-K PCB 0.71 0.625 0.425 25 39 75 89 108 150 Ambient Temperature – °C NOTE: These curves are to be used for guideline purposes only. For a particular application, a more specific thermal characterization is required. Figure 10. Power Dissipation Derating Curves APPLICATION INFORMATION 1 2 4.7 µF NC 5VAUX 3.3VAUX 8 7 0.1 µF 0.1 µF 4.7 µF TPPM0304 3 4 4.7 µF GND NC 5VCC NC 3.3VOUT 6 5 4.7 µF 0.1 µF Figure 11. Typical Application Schematic POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11 TPPM0304 250-mA LOW-DROPOUT REGULATOR WITH AUXILIARY POWER MANAGEMENT SLVS320 – OCTOBER 2000 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 0.010 (0,25) 1 7 0°– 8° 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. 12 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). Falls within JEDEC MS-012 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Customers are responsible for their applications using TI components. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 2000, Texas Instruments Incorporated