PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 2.25-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR • • • FEATURES • • • • • • • • Up to 2.25-A Output Current at 85°C 4.5-V to 18-V Input Voltage Range Wide-Output Voltage Adjust (0.9 V to 5.5 V) Efficiencies Up To 93% On/Off Inhibit Undervoltage Lockout (UVLO) Output Overcurrent Protection (Nonlatching, Auto-Reset) Overtemperature Protection Ambient Temperature Range: –40°C to 85°C Surface-Mount Package Safety Agency Approvals: UL/CUL 60950, EN60950 VDE (Pending) APPLICATIONS • Telecommunications, Instumentation, and General-Purpose Circuits DESCRIPTION The PTH08080W is a highly integrated, low-cost switching regulator module that delivers up to 2.25 A of output current. The PTH08080W sources output current at a much higher efficiency than a TO-220 linear regulator IC, thereby eliminating the need for a heat sink. Its small size (0.5 × 0.6 in) and flexible operation creates value for a variety of applications. The input voltage range of the PTH08080W is from 4.5 V to 18 V, allowing operation from either a 5-V or 12-V input bus. Using state-of-the-art switched-mode power-conversion technology, the PTH08080W can step down to voltages as low as 0.9 V from a 5-V input bus, with less than 1 W of power dissipation. The output voltage can be adjusted to any voltage over the range, 0.9 V to 5.5 V, using a single external resistor. Operating features include an undervoltage lockout (UVLO), on/off inhibit, overcurrent protection, and overtemperature protection. Target applications include telecommunications, test and measurement applications, and high-end consumer products. This product is available in both through-hole and surface-mount package options, including tape and reel. STANDARD APPLICATION Inhibit D1$ 5 4 RSET # 0.05 W, 1% (Required) PTH08080W (Top View ) VI 1 + GND CI * 100 mF Electrolytic VO 3 2 (Required) CO * 100 mF Electrolytic (Optional) GND * See The Capacitor Application Information # See the Specification Table for the RSET value. $ Diode is Required When VO > 5.25 V and VI > 16 V. 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. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2005, Texas Instruments Incorporated PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ORDERING INFORMATION PTH08080 (Basic Model) Output Voltage 0.9 V - 5.5 V (1) Part Number Description Package Designator PTH08080WAH Horizontal T/H EUF PTH08080WAS (1) Horizontal SMD EUG Add a T suffix for tape and reel option on SMD packages. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted (1) TA Tstg (1) Operating free-air temperature Over Vin range Solder reflow temperature Surface temperature of module body or pins Storage temperature PTH08080W UNIT –40 to 85 °C 235 °C –40 to 125 °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. RECOMMENDED OPERATING CONDITIONS MIN MAX VI Input voltage 4.5 18 V TA Operating free-air temperature –40 85 °C PACKAGE SPECIFICATIONS PTH08080W (Suffix AH and AS) Weight Flammability Mechanical shock Mechanical vibration (1) 2 Qualification limit. 1.5 grams Meets UL 94 V-O Per Mil-STD-883D, Method 2002.3, 1 ms, 1/2 sine, mounted 500 Gs Mil-STD-883D, Method 2007.2, 20-2000 Hz 20 Gs (1) (1) UNIT PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 ELECTRICAL CHARACTERISTICS at 25°C free-air temperature, VI = 12 V, VO = 3.3 V, IO = IOmax, CI = 100 µF, CO = 100 µF (unless otherwise noted) PARAMETER TEST CONDITIONS MIN IO Output current TA = 85°C, natural convection airflow 0 PO Output power TA = 85°C, natural convection airflow Set-point voltage tolerance TA = 25°C Temperature variation -40 ≤ TA ≤ +85°C Line regulation Over VI range ±7 mV Load regulation Over IO range ±0.13 %Vo Total output voltage variation Includes set-point, line, load, -40 ≤ TA ≤ +85°C Output Voltage Adjust Range Over IO range VO VADJ Input Voltage Range Over VO range Efficiency TA = 25°C, IO = 2 A UVLO A 10 W (1) % %Vo 3 (1) 0.9 5.5 4.5 VO x 10 (2) 1.8 V < VO ≤ 3.4 V 4.5 18 3.4 V < VO ≤ 5.5 V VO + 2 (2) 18 (2) %Vo V V 93.5% RSET = 1.87 kΩ, VO = 3.3 V 92% RSET = 3.74 kΩ, VO = 2.5 V 91% RSET = 6.19 kΩ, VO = 2 V 90% RSET = 8.06 kΩ, VO = 1.8 V IO (trip) UNIT 2.25 ±0.5 RSET = 348 Ω, VO = 5 V η MAX ±2 0.9 V ≤ VO ≤ 1.8 V VI TYP 89% RSET = 13 kΩ, VO = 1.5 V 87.5% RSET = 27.4 kΩ, VO = 1.2 V 86.5% Output voltage ripple 20 MHz bandwith 30 Overcurrent threshold Reset, followed by autorecovery 3.5 A Recovery time 50 µs Transient response CO = 100 µF, 1 A/µs load step from 50% to 100% IOmax VO over/undershoot 70 mV Undervoltage lockout VI = increasing VI = decreasing Input high voltage (VIH) Inhibit control (pin 5) Input low voltage (VIL) 4.35 3.6 mVPP 4.5 4 VI – 0.5 Open –0.2 V (3) 0.5 V Input low current (IIL) 5 µA II (stby) Input standby current Pins 5 and 2 connected 1 mA fS Switching frequency Over VI and IO ranges 300 kHz External input capacitance Electrolytic type (CI) 100 (4) µF Ceramic type (CO) External output capacitance (1) (2) (3) (4) (5) (6) (7) Calculated reliability 100 (5) Nonceramic type (CO) Equivalent series resistance (nonceramic) MTBF 220 Per Telcordia SR-332, 50% stress, TA = 40°C, ground benign 10 330 (6) µF (7) mΩ 48 106 Hr The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a tolerance of 1% with 100 ppm/°C or better temperature stability. The minimum input voltage is 4.5 V or (VO + 2) V, whichever is greater. The maximum input voltage is 18 V or VO x 10, whichever is less. This control pin has an internal pullup to 3.3 V. If it is left open-circuit, the module operates when input power is applied. A small low-leakage (< 100 nA) metal-oxide semiconductor field effect transistor (MOSFET) is recommended for control. See the application information for further guidance. An external 100-µF electrolytic capacitor is required across the input (VI and GND) for proper operation. Locate the capacitor close to the module. An external 100-µF electrolytic capacitor is optional across the output (VO and GND). Locate the capacitor close to the module. Additional capacitance close to the load improves the response of the regulator to load transients. This is the calculated maximum capacitance. The minimum ESR limitation often results in a lower value. See the capacitor application information for further guidance. This is the typical ESR for all the electrolytic (nonceramic) capacitance. Use 10 mΩ as the minimum when calculating the total equivalent series resistance (ESR) using the maximum ESR values specified by the capacitor manufacturer. 3 PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 PIN ASSIGNMENT TERMINAL FUNCTIONS TERMINAL NAME NO. VI 1 GND 2 VO 3 I/O I DESCRIPTION The positive input voltage power node to the module, which is referenced to common GND. This is the common ground connection for the VI and VO power connections. It is also the 0-Vdc reference for the Inhibit and VO Adjust control inputs. O The regulated positive power output with respect to the GND node. VO Adjust 4 I A 1% resistor must be connected between this pin and GND (pin 1) to set the output voltage of the module higher than 0.9 V. If left open-circuit, the output voltage defaults to this value. The temperature stability of the resistor should be 100 ppm/°C (or better). The set-point range is from 0.9 V to 5.5 V. The electrical specification table gives the standard resistor value for a number of common output voltages. See the application information for further guidance. Inhibit 5 I The Inhibit pin is an open-collector/drain-negative logic input that is referenced to GND. Applying a low-level ground signal to this input disables the module's output. When the Inhibit control is active, the input current drawn by the regulator is significantly reduced. If the Inhibit pin is left open-circuit, the module produces an output voltage whenever a valid input source is applied. 5 PIN 1 2 3 4 Figure 1. Terminal Location 4 PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 TYPICAL CHARACTERISTICS (5-V INPUT) (1) (2) EFFICIENCY vs OUTPUT CURRENT 50 VO = 3.3 V VO − Output Voltage Ripple − mV PP 100 OUTPUT RIPPLE vs OUTPUT CURRENT VO = 2.5 V Efficiency − % 90 VO = 1.2 V 80 VO = 1.8 V VO = 1 V VO = 1.5 V VO = 0.9 V 70 60 50 40 VO = 1.8 V 30 VO = 1 V 0 10 VO = 1.2 V 0.25 0.5 0.75 1 1.25 1.5 1.75 2 0 2.25 0.25 0.5 0.75 1 1.25 1.5 1.75 2 Figure 2. Figure 3. POWER DISSIPATION vs OUTPUT CURRENT TEMPERATURE DERATING vs OUTPUT CURRENT 2.25 90 1 VO = 3.3 V VO = 2.5 V 0.75 VO = 1.8 V VO = 1.5 V 0.5 VO = 1.2 V 0.25 VO = 1 V VO = 0.9 V 0 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 IO − Output Current − A Figure 4. Airflow Nat Conv 80 Temperature Derating − C PD− Power Dissipation − W VO = 1.5 V IO − Output Current − A IO − Output Current − A (2) VO = 3.3 V 20 0 40 (1) VO = 2.5 V VO = 0.9 V 70 60 50 40 30 20 0.25 0.75 1.25 1.75 2.25 IO − Output Current − A Figure 5. The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the converter. Applies to Figure 2, Figure 3, and Figure 4. The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum operating temperatures. Derating limits apply to modules soldered directly to a 100-mm x 100-mm, double-sided PCB with 2-oz. copper. Applies to Figure 5. 5 PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 TYPICAL CHARACTERISTICS (12-V INPUT) (1) (2) EFFICIENCY vs OUTPUT CURRENT OUTPUT RIPPLE vs OUTPUT CURRENT 100 100 VO = 3.3 V VO = 5 V V O − Output Voltage Ripple − mV PP VO = 2.5 V Efficiency − % 90 VO = 1.8 V VO = 1.5 V 80 VO = 1.2 V 70 60 50 80 60 VO = 1.8 V VO = 3.3 V VO = 2.5 V 40 20 0.5 1 1.5 2 2.5 0 IO − Output Current − A 1 1.5 2 IO − Output Current − A Figure 6. Figure 7. POWER DISSIPATION vs OUTPUT CURRENT TEMPERATURE DERATING vs OUTPUT CURRENT 1 0.5 Temperature Derating − C PD − Power Dissipation − W VO = 5 V 0.75 VO = 3.3 V VO = 2.5 V 0.5 VO = 1.8V 0.25 VO = 1.5 V VO = 1.2 V 0 0 0.5 1 1.5 IO − Output Current − A Figure 8. (2) 6 2.5 90 Airflow Nat Conv 80 (1) VO = 1.2 V VO = 1.5 V 0 0 VO = 5 V 2 2.5 70 60 50 40 30 20 0.25 0.75 1.25 1.75 2.25 IO − Output Current − A Figure 9. The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the converter. Applies to Figure 6, Figure 7, and Figure 8. The temperature derating curves represent the conditions at which internal components are at or below the manufacturer's maximum operating temperatures. Derating limits apply to modules soldered directly to a 100-mm x 100-mm, double-sided PCB with 2-oz. copper. Applies to Figure 9. PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 APPLICATION INFORMATION Adjusting the Output Voltage of the PTH08080W Wide-Output Adjust Power Modules The VO Adjust control (pin 4) sets the output voltage of the PTH08080W product. The adjustment range is from 0.9 V to 5.5 V. The adjustment method requires the addition of a single external resistor, RSET, that must be connected directly between the VO Adjust and GND (pin 2). Table 1 gives the standard external resistor for a number of common bus voltages, along with the actual voltage the resistance produces. For other output voltages, the value of the required resistor can either be calculated using the following formula, or simply selected from the range of values given in Table 2. Figure 10 shows the placement of the required resistor. 0.891 V RSET = 10 kW x - 1.82 kW Vout - 0.9 V Table 1. Standard Values of RSET for Common Output Voltages (1) VO (Required) Rset (Standard Value) VO (Actual) 5V 348 Ω 5.010 V 3.3 V (1) 1.87 kΩ 3.315 V 2.5 V (1) 3.74 kΩ 2.503 V 2V 6.19 kΩ 2.012 V 1.8 V 8.06 kΩ 1.802 V 1.5 V 13.0 kΩ 1.501 V 1.2 V 27.4 kΩ 1.205 V 1V 86.6 kΩ 1.001 V 0.9 V Open 0.9 V The minimum input voltage is 4.5 V or (VO + 2) V, whichever is greater. The maximum input voltage is 18 V or (VO *10) V, whichever is lesser. D1 (See Note 3) VI PTH08080W 1 VO 3 VO VI Inhibit 5 GND VOAdj 2 4 RSET CI 0.05 W 1% GND CO GND (1) A 0.05-W rated resistor may be used. The tolerance should be 1%, with a temperature stability of 100 ppm/°C (or better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pins 4 and 2 using dedicated PCB traces. (2) Never connect capacitors from VO Adjust to either GND or VO. Any capacitance added to the VO Adjust pin affects the stability of the regulator. (3) The protection diode, D1, is required whenever the output voltage setpoint is adjusted to 5.25 V (or higher) and VI is 16 V or greater. Figure 10. VO Adjust Resistor Placement 7 PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 Table 2. Calculated Set-Point Resistor Values Va Required 8 Rset Va Required Rset Va Required Rset 0.900 Open 1.800 8.08 kΩ 3.700 1.36 kΩ 0.925 355 kΩ 1.850 7.56 kΩ 3.750 1.32 kΩ 0.950 176 kΩ 1.900 7.09 kΩ 3.800 1.25 kΩ 0.975 117 kΩ 1.950 6.67 kΩ 3.850 1.20 kΩ 1.000 87.2 kΩ 2.000 6.28 kΩ 3.900 1.15 kΩ 1.025 69.5 kΩ 2.050 5.92 kΩ 3.950 1.10 kΩ 1.050 57.6 kΩ 2.100 5.61 kΩ 4.000 1.05 kΩ 1.075 49.1 kΩ 2.150 5.31 kΩ 4.050 1.01 kΩ 1.100 42.7 kΩ 2.200 5.03 kΩ 4.100 964 Ω 1.125 37.8 kΩ 2.250 4.78 kΩ 4.150 922 Ω 1.150 33.8 kΩ 2.300 4.54 kΩ 4.200 880 Ω 1.175 30.6 kΩ 2.350 4.33 kΩ 4.250 840 Ω 1.200 27.9 kΩ 2.400 4.12 kΩ 4.300 801 Ω 1.225 25.6 kΩ 2.450 3.93 kΩ 4.350 763 Ω 1.250 23.6 kΩ 2.500 3.75 kΩ 4.400 726 Ω 1.275 21.9 kΩ 2.550 3.58 kΩ 4.450 690 Ω 1.300 20.5 kΩ 2.600 3.42 kΩ 4.500 655 Ω 1.325 19.1 kΩ 2.650 3.27 kΩ 4.550 621 Ω 1.350 17.9 kΩ 2.700 3.13 kΩ 4.600 588 Ω 1.375 16.9 kΩ 2.750 2.99 kΩ 4.650 556 Ω 1.400 14.6 kΩ 2.800 2.87 kΩ 4.700 525 Ω 1.425 13.7 kΩ 2.850 2.75 kΩ 4.750 494 Ω 1.450 13.0 kΩ 2.900 2.64 kΩ 4.800 465 Ω 1.475 13.7 kΩ 2.950 2.53 kΩ 4.850 436 Ω 1.500 13.0 kΩ 3.000 2.42 kΩ 4.900 408 Ω 1.525 12.4 kΩ 3.050 2.32 kΩ 4.950 380 Ω 1.550 11.9 kΩ 3.100 2.23 kΩ 5.000 353 Ω 1.575 11.4 kΩ 3.150 2.14 kΩ 5.050 327 Ω 1.600 10.9 kΩ 3.200 2.05 kΩ 5.100 301 Ω 1.625 10.5 kΩ 3.250 1.97 kΩ 5.150 276 Ω 1.650 10.0 kΩ 3.300 1.89 kΩ 5.200 252 Ω 1.675 9.68 kΩ 3.350 1.82 kΩ 5.250 228 Ω 1.700 9.32 kΩ 3.400 1.74 kΩ 5.300 205 Ω 1.725 8.98 kΩ 3.450 1.67 kΩ 5.350 182 Ω 1.750 8.66 kΩ 3.500 1.61 kΩ 5.400 160 Ω 1.775 8.36 kΩ 3.550 1.54 kΩ 5.450 138 Ω 1.800 8.08 kΩ 3.600 1.48 kΩ 5.500 117 Ω 1.825 7.81 kΩ 3.650 1.42 kΩ www.ti.com PTH08080W SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 CAPACITOR RECOMMENDATIONS FOR THE PTH08080W WIDE-OUTPUT ADJUST POWER MODULES Input Capacitor The minimum recommended input capacitor is 100 µF of capacitance. When VO >3.4 V, the 100-µF electrolytic capacitance must be rated for 650-mArms ripple current . For VO < 3.4 V, the ripple current rating must be at least 500 mArms. The ripple current rating of electrolytic capacitors is a major consideration when they are used at the input. When specifying regular tantalum capacitors for use at the input, a minimum voltage rating of 2 × (maximum dc voltage + ac ripple) is highly recommended. This is standard practice to ensure reliability. Polymer-tantalum capacitors are not affected by this requirement. For improved ripple reduction on the input bus, ceramic capacitors can also be added to complement the required electrolytic capacitance. Output Capacitors (Optional) No output capacitance is required for normal operation. However, applications with load transients (sudden changes in load currrent) can benefit by adding external output capacitance. A 100-µF electrolytic or ceramic capacitor can be used to improve transient response. Adding a 100-µF nonceramic capacitor allows the module to meet its transient response specification. A high-quality computer-grade electrolytic capacitor should be adequate. Electrolytic capacitors should be located close to the load circuit. These capacitors provide decoupling over the frequency range, 2 kHz to 150 kHz. Aluminum electrolytic capacitors are suitable for ambient temperatures above 0°C. For operation below 0°C, tantalum or Os-Con-type capacitors are recommended. When using one or more nonceramic capacitors, the calculated equivalent ESR should be no lower than 10 mΩ (14 mΩ using the manufacturer's maximum ESR for a single capacitor). A list of preferred low-ESR-type capacitors are identified in Table 3, the recommended capacitor table. Ceramic Capacitors Above 150 kHz, the performance of aluminum electrolytic capacitors becomes less effective. To further improve the reflected input ripple current, or the output transient response, multilayer ceramic capacitors must be added. Ceramic capacitors have low ESR and their resonant frequency is higher than the bandwidth of the regulator. When placed at the output their combined ESR is not critical as long as the total value of ceramic capacitance does not exceed 200 µF. Also, to prevent the formation of local resonances, do not exceed the maximum number of capacitors specified in the capacitor table. Tantalum Capacitors Additional tantalum-type capacitors can be used at both the input and output, and are recommended for applications where the ambient operating temperature can be less than 0°C. The AVX TPS, Sprague 593D/594/595, and Kemet T495/T510/T520 capacitors series are suggested over many other tantalum types due to their rated surge, power dissipation, and ripple current capability. As a caution, many general-purpose tantalum capacitors have considerably higher ESR, reduced power dissipation, and lower ripple current capability. These capacitors are also less reliable as they have lower power dissipation and surge current ratings. Tantalum capacitors that do not have a stated ESR or surge current rating are not recommended for power applications. When specifying Os-Con and polymer tantalum capacitors for the output, the minimum ESR limit is encountered well before the maximum capacitance value is reached. Capacitor Table The capacitor table, Table 3, identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The recommended number of capacitors required at both the input and output buses is identified for each capacitor type. This is not an extensive capacitor list. Capacitors from other vendors are available with comparable specifications. Those listed are for guidance. The rms rating and ESR (at 100 kHz) are critical parameters necessary to ensure both optimum regulator performance and long capacitor life. 9 PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 Designing for Load Transients The transient response of the dc/dc converter has been characterized using a load transient with a di/dt of 1 A/µs. The typical voltage deviation for this load transient is given in the data-sheet specification table using the optional value of output capacitance. As the di/dt of a transient is increased, the response of a converter's regulation circuit ultimately depends on its output capacitor decoupling network. This is an inherent limitation with any dc/dc converter once the speed of the transient exceeds its bandwidth capability. If the target application specifies a higher di/dt or lower voltage deviation, the requirement can only be met with additional output capacitor decoupling. In these cases, special attention must be paid to the type, value, and ESR of the capacitors selected. If the transient performance requirements exceed those specified in the data sheet, the selection of output capacitors becomes more important. Review the minimum ESR in the characteristic data sheet for details on the capacitance maximum. Table 3. Recommended Input/Output Capacitors CAPACITOR CHARACTERISTICS CAPACITOR VENDOR/ COMPONENT SERIES WORKING VALUE VOLTAGE (µF) (V) QUANTITY EQUIVALENT SERIES RESISTANCE (ESR) (Ω) 85°C MAXIMUM RIPPLE CURRENT (Irms) (mA) PHYSICAL SIZE (mm) INPUT BUS (1) OUTPUT BUS (Optional) VENDOR NUMBER Panasonic WA (SMT) FC (SMT) 20 25 150 220 0.026 0.150 3700 670 10 × 10,2 10 × 10,2 1 1 ≤2 1 EEFWA1D151P EEVFC1E221P Panasonic SL SP-cap(SMT) 6.3 6.3 47 120 0.018 0.007 2500 3500 7,3 × 4,3 7,3 × 4,3 N/R (2) N/R (2) ≤3 ≤1 EEFCD0J470R EEFSD0J121R United Chemi-con PXA (SMT) 16 150 0.026 3400 10 × 7,7 1 ≤2 PXA16VC151MJ80TP VI < 14 V PS LXZ MVZ (SMT) 25 35 25 100 220 470 0.020 0.180 0.090 4300 760 670 10 × 12,5 10 × 12,5 10 × 10 1 1 1 ≤2 1 1 25PS100MJ12 LXZ35VB221M10X12LL MVZ25VC471MJ10TP Nichicon UWG (SMT) F559(Tantalum) HD 35 10 25 100 100 220 0.150 0.055 0.072 670 2000 760 10 × 10 7,7 × 4,3 8 × 11,5 1 N/R (2) 1 1 ≤3 1 UWG1V101MNR1GS F551A107MN UHD1E221MPR Sanyo Os-con\ POS-Cap SVP (SMT) SP 10 20 20 68 150 120 0.025 0.020 0.024 2400 4320 3110 7,3 × 4,3 10 × 12,7 8 × 10,5 N/R (2) 1 1 ≤2 ≤1 ≤2 10TPE68M 20SVP150M 20SP120M AVX Tantalum TPS (SMD) 35 25 47 47 0.100 0.100 1430 1150 7,3 L × 4,3 W × 4,1 H 2 2 ≤4 ≤4 TPSV476M035R0100 TPSE476M025R0100 VI < 13 V Kemet T520 (SMD) AO-CAP 10 6.3 100 100 0.025 0.018 > 2000 > 2900 7,3 L × 5,7 W×4H N/R (2) N/R (2) ≤1 ≤1 T520V107M010ASE025 A700V107M006AT Vishay/Sprague 594D/SVP(SMD) 35 20 47 100 0.280 0.025 > 1000 3200 7,3 L × 6 W × 4,1 H 8 × 12 2 1 ≤5 ≤2 595D476X0035R2T 94SVP107X0020E12 94SS 20 150 0.030 3200 10 × 10,5 1 ≤2 94SS157X0020FBP Murata Ceramic X5R 16 47 0.002 > 1400 3225 ≤3 GRM32ER61C476M VI < 14 V TDK ceramic X5R 6.3 47 0.002 > 1400 3225 N/R (2) ≤3 C3225X5R0J476MT VO < 5.5 V Kemet Ceramic X5R 6.3 47 0.002 > 1400 3225 N/R (2) ≤3 C1210C476K9PAC VO < 5.5 V TDK Ceramic X7R Murata Ceramic X5R Kemet 25 25 16 10 10 10 0.002 0.002 0.002 > 1400 > 1400 > 1400 3225 ≤4 ≤4 ≤4 C3225X7R1E106K GRM32DR61E106KA12 C1210C106M4PAC VI < 14 V TDK Ceramic X7R Murata Ceramic X7R Kemet 25 25 25 2.2 2.2 2.2 0.002 0.002 0.002 > 1400 > 1400 > 1400 3225 1 1 1 C3225X7R1E225KT/MT GRM32RR71J225KC01L C1210C225K3RAC (1) (2) (3) 10 1 1 1 1 (3) (3) (3) (3) 1 1 1 The voltage rating of the input capacitor must be selected for the desired operating input voltage range of the regulator. To operate the regulator at a higher input voltage, select a capacitor with a higher voltage rating. The voltage rating of the input capacitor must be selected for the desired operating input voltage range of the regulator. To operate the regulator at a higher input voltage, select a capacitor with a higher voltage rating. Ceramic capacitors can be used to complement electrolytic types at the input bus by reducing high-frequency ripple current. PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 Power-Up Characteristics When configured per the standard application, the PTH08080 power module produces a regulated output voltage following the application of a valid input source voltage. During power up, internal soft-start circuitry slows the rate that the output voltage rises, thereby limiting the amount of in-rush current that can be drawn from the input source. Figure 11 shows the power-up waveforms for a PTH08080W, operating from a 12-V input and with the output voltage adjusted to 1.8 V. The waveforms were measured with a 2-A resistive load. VI (5 V/div) VO (1 V/div) II (0.5 A/div) t - Time = 5 ms/div Figure 11. Power-Up Waveforms Current Limit Protection The PTH08080 modules protect against load faults with an output overcurrent trip. Under a load fault condition, the output current cannot exceed the current limit value. Attempting to draw current that exceeds the current limit value causes the output voltage to enter into a hiccup mode of operation, whereby the module continues in a cycle of successive shutdown and power up until the load fault is removed. On removal of the fault, the output voltage promptly recovers. Thermal Shutdown Thermal shutdown protects the module internal circuitry against excessively high temperatures. A rise in temperature may be the result of a drop in airflow, a high ambient temperature, or a higher than normal output current. If the junction temperature of the internal components exceeds 165°C, the module shuts down. This reduces the output voltage to zero. The module starts up automatically, by initiating a soft-start power up when the sensed temperature decreases 10°C below the thermal shutdown trip-point. Output On/Off Inhibit For applications requiring output voltage on/off control, the PTH08080 power module incorporates an output on/off Inhibit control (pin 5). The inhibit feature can be used wherever there is a requirement for the output voltage from the regulator to be turned off. The power module functions normally when the Inhibit pin is left open-circuit, providing a regulated output whenever a valid source voltage is connected to VI with respect to GND. Figure 12 shows the typical application of the inhibit function. Note the discrete transistor (Q1). The Inhibit control has its own internal pullup to 3 volts. An open-collector or open-drain device is recommended to control this input. Turning Q1 on applies a low voltage to the Inhibit control pin and disables the output of the module. If Q1 is then turned off, the module executes a soft-start power-up sequence. A regulated output voltage is produced within 20 ms. Figure 13 shows the typical rise in the output voltage, following the turn off of Q1. The turn off of Q1 corresponds to the rise in the waveform, Q1 VDS. The waveforms were measured with a 2-A resistive load. 11 PTH08080W www.ti.com SLTS235A – FEBRUARY 2005 – REVISED MARCH 2005 PTH08080W VI = 12 V 1 VI Inhibit 5 Inhibit GND VO Adj 2 4 RSET 8.06 kW 0.05 W 1% CI VO = 1.8 V 3 VO L O A D CO Q1 BSS138 GND GND Figure 12. On/Off Inhibit Control Circuit VO (1 V/div) II (0.5 A/div) Q1 VDS (5 V/div) t - Time = 5 ms/div Figure 13. Power-Up Response From Inhibit Control 12 PACKAGE OPTION ADDENDUM www.ti.com 11-Oct-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty PTH08080WAD ACTIVE DIP MOD ULE EUF 5 90 Pb-Free (RoHS) Call TI Level-NC-NC-NC PTH08080WAH ACTIVE DIP MOD ULE EUF 5 90 TBD Call TI Level-1-235C-UNLIM PTH08080WAS ACTIVE DIP MOD ULE EUG 5 90 TBD Call TI Level-1-235C-UNLIM PTH08080WAST ACTIVE DIP MOD ULE EUG 5 250 TBD Call TI Level-1-235C-UNLIM PTH08080WAZ ACTIVE DIP MOD ULE EUG 5 90 Pb-Free (RoHS) Call TI Level-3-260C-168 HR PTH08080WAZT ACTIVE DIP MOD ULE EUG 5 250 Pb-Free (RoHS) Call TI Level-3-260C-168 HR Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. 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