PTH05000 Series —5-V Input 6-A, 5-V Input Non-Isolated Wide-Output Adjust Power Module SLTS201B – MAY 2003 – REVISED AUGUST 2003 Features NOMINAL SIZE = 0.75 in x 0.5 in (19,05 mm x 12,7 mm) • Up to 6-A Output Current • 5-V Input Voltage • Wide-Output Voltage Adjust (0.9 V to 3.6 V) • Efficiencies up to 94 % • 160 W/in³ Power Density • On/Off Inhibit • Under-Voltage Lockout • Output Current Limit • • • • • • Pre-Bias Startup Over-Temperature Protection Surface Mountable Operating Temp: –40 to +85 °C DSP Compatible Output Voltages IPC Lead Free 2 Description Pin Configuration The PTH05000 series of non-isolated power modules are small in size and high on performance. Using double-sided surface mount construction and synchronous rectification technology, these regulators deliver up to 6 A of output current while occupying a PCB area of about half the size of a standard postage stamp. They are an ideal choice for applications where space, performance and cost are important design constraints. The series operates from an input voltage of 5 V to provide step-down power conversion to any output voltage over the range, 0.9 V to 3.6 V. The output voltage of the PTH05000W is set within this range using a single resistor. Operating features include an on/off inhibit, output voltage adjust (trim), an output current limit, and over-temperature protection. For high efficiency these parts employ a synchronous rectifier output stage. An output pre-bias holdoff capability ensures that the output will not sink current during startup. Target applications include telecom, industrial, and general purpose circuits, including low-power dual-voltage systems that use a DSP, microprocessor, or ASIC. Package options include both throughhole and surface mount configurations. Pin 1 2 3 4 5 Function GND Vin Inhibit * Vo Adjust Vout * Denotes negative logic: Open = Output On Ground = Output Off Standard Application 1 2 Inhibit PTH05000W (Top View) 3 4 + CIN 330 µF (Required) VOUT 5 GND RSET 1 %, 0.1 W (Required) COUT 100 µF (Optional) + VIN GND Rset = Reistor to set the desired output voltage (see spec. table for values) Cin = Required electrolytic 330 µF Cout = Recommended 100 µF electrolytic For technical support and more information, see inside back cover or visit www.ti.com PTH05000 Series —5-V Input 6-A, 5-V Input Non-Isolated Wide-Output Adjust Power Module SLTS201B – MAY 2003 – REVISED AUGUST 2003 Ordering Information Output Voltage (PTH05000Hxx) Package Options (PTH05000xHH) (1) Code W Code Voltage 0.9 V – 3.6 V (Adjust) AH AS Description Pkg Ref. Horiz. T/H SMD, Standard (3) (2) (EUS) (EUT) Notes: (1) Add “T” to end of part number for tape and reel on SMD packages only. (2) Reference the applicable package reference drawing for the dimensions and PC board layout (3) “Standard” option specifies 63/37, Sn/Pb pin solder material. Pin Descriptions Vin: The positive input voltage power node to the module, which is referenced to common GND. GND: This is the common ground connection for the ‘Vin’ and ‘Vout’ power connections. It is also the 0 VDC reference for the ‘Inhibit’ and ‘Vo Adjust’ control input. Vout: The regulated positive power output with respect to the GND node. Inhibit: The Inhibit pin is an open-collector/drain negative logic input that is referenced to GND. Applying a lowlevel ground signal to this input disables the module’s output and turns off the output voltage. When the Inhibit control is active, the input current drawn by the regulator is significantly reduced. If the Inhibit pin is left opencircuit, the module will produce an output whenever a valid input source is applied. Vo Adjust: A 0.1 W, 1 % 100 ppm/°C resistor must be connected between this pin and the GND pin to set the output voltage to the desired value. The set point range for the output voltage is from 0.9 V to 3.6 V. The resistor required for a given output voltage may be calculated from the following formula. If left open circuit, the module output will default to its lowest output voltage value. For further information on the adjustment and/or trimming of the output voltage, consult the related application note. Rset = 10 kΩ · 0.891 V Vout – 0.9 V – 3.24 kΩ The specification table gives the preferred resistor values for a number of standard output voltages. For technical support and more information, see inside back cover or visit www.ti.com PTH05000 Series —5-V Input 6-A, 5-V Input Non-Isolated Wide-Output Adjust Power Module SLTS201B – MAY 2003 – REVISED AUGUST 2003 Environmental & Absolute Maximum Ratings (Voltages are with respect to GND) Characteristics Symbols Conditions Min Typ Max Units Operating Temperature Range Solder Reflow Temperature Storage Temperature Over Temperature Protection Mechanical Shock Ta Treflow Ts OTP Over Vin Range Surface temperature of module body or pins — IC junction temperature Per Mil-STD-883D, Method 2002.3 1 msec, ½ sine, mounted Mil-STD-883D, Method 2007.2 20-2000 Hz –40 (i) — –40 — — 150 +85 215 (ii) +125 — °C °C °C °C — 500 — G’s — 20 — G’s — 2 — grams Mechanical Vibration Weight Flammability — — Meets UL 94V-O Notes: (i) For operation below 0 °C the external capacitors must have stable characteristics. Use either a low ESR tantalum, Oscon®, or ceramic capacitor. (ii) During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the stated maximum. For further guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Power Surface Mount Products.” Electrical Specifications Unless otherwise stated, T a =25 °C, Vin =5 V, V o =3.3 V, C in =330 µF, C out =0 µF, and Io =Io (max) Characteristics Symbols Conditions Output Current Io 0.9 V ≤ Vo ≤3.6 V, Input Voltage Range Set-Point Voltage Tolerance Temperature Variation Line Regulation Load Regulation Total Output Variation Vin Vo tol ∆Regtemp ∆Regline ∆Regload ∆Regtot Over Io range Efficiency η Vo = 3.3 V Vo = 2.5 V Vo = 2.0 V Vo = 1.8 V Vo = 1.5 V Vo = 1.2 V Vo = 1.0 V Vo ≥3.3 V Vo ≤2.5 V 1 A/µs load step, 50 to 100 % Iomax, Vo =1.8 V, Cout =100 µF Recovery time Vo over/undershoot ∆Vo = –50 mV Vin increasing Vin decreasing Referenced to GND Vo Ripple (pk-pk) Vr Transient Response Current Limit Under-Voltage Lockout ttr ∆Vtr Ilim UVLO Inhibit Control (pin 3) Input High Voltage Input Low Voltage Input Low Current VIH VIL IIL Standby Input Current Switching Frequency External Input Capacitance External Output Capacitance Reliability Iin standby ƒs Cin Cout MTBF Min PTH05000W Typ Max Units 0 0 4.5 — — — — — — — — ±0.5 ±5 ±5 6 (1) 5.25 (1) 5.5 ±2 (2) — — — A V %Vo %Vo mV mV — — ±3 (2) %Vo — — — — — — — — — 92 90 88 87 84 82 79 30 25 — — — — — — — — — — — — — 3.4 70 100 13 3.8 3.5 — — — 4.3 — Pin 3 to GND pins 1 & 3 connected Over Vin and Io ranges Vin –0.5 –0.2 — — — 330 (4) 0 — — –10 1 700 — 100 Open (3) 0.8 — — — — 1,000 Per Bellcore TR-332 50 % stress, Ta =40 °C, ground benign 28 — Ta =25 °C, natural convection Ta =60 °C, 200LFM –40 °C <Ta < +85 °C Over Vin range Over Io range Includes set-point, line, load, –40 °C ≤ T a ≤ +85 °C RSET = 475 Ω Vin =5 V, Io =4 A RSET = 2.32 kΩ RSET = 4.87 kΩ RSET = 6.65 kΩ RSET = 11.5 kΩ RSET = 26.1 kΩ RSET = 84.5 kΩ 20 MHz bandwidth (5) — % mVpp µSec mV A V V µA mA kHz µF µF 106 Hrs Notes: (1) See SOA curves or consult factory for appropriate derating. (2) The set-point voltage tolerance is affected by the tolerance and stability ofRSET . The stated limit is unconditionally met if RSET has a tolerance of 1 % with 100 ppm/°C or better temperature stability. (3) The Inhibit control (pin 3) has an internal pull-up to Vin, and if left open-circuit the module will operate when input power is applied. A small lowleakage (<100 nA) MOSFET is recommended to control this input. See application notes for more information. (4) The regulator requires a minimum of 330 µF input capacitor with a minimum 300 mArms ripple current rating. For further information, consult the related application note on Capacitor Recommendations. (5) An external output capacitor is not required for basic operation. Adding 100 µF of distributed capacitance at the load will improve the transient response. For technical support and more information, see inside back cover or visit www.ti.com PTH05000 Series —5-V Input Typical Characteristics 6-A, 5-V Input Non-Isolated Wide-Output Adjust Power Module Characteristic Data; Vin =5 V SLTS201B – MAY 2003 – REVISED AUGUST 2003 Safe Operating Area; Vin =5 V (See Note A) Efficiency vs Output Current Output Voltage =3.3 V 100 90 3.3 V 2.5 V 2.0 V 1.8 V 1.5 V 1.2 V 1.0 V 80 70 60 Ambient Temperature (°C) 80 VOUT 90 Efficiency - % (See Note B) Airflow 70 400LFM 200LFM 100LFM Nat Conv 60 50 40 30 50 20 0 1 2 3 4 5 6 0 Iout - Amps 1 2 3 4 5 6 Iout (A) Ripple vs Output Current 50 VOUT Ripple - mV 40 3.3 V 2.5 V 2.0 V 1.8 V 1.5 V 1.2 V 1.0 V 30 20 10 0 0 1 2 3 4 5 6 Iout - Amps Power Dissipation vs Output Current 3 2.5 Pd - Watts 2 1.5 1 0.5 0 0 1 2 3 4 5 6 Iout - Amps Note A: Characteristic data has been developed from actual products tested at 25 °C. This data is considered typical data for the Converter. Note B: SOA 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 4 in. × 4 in. double-sided PCB with 1 oz. copper. For technical support and more information, see inside back cover or visit www.ti.com Application Notes PTH05000W Adjusting the Output Voltage of the PTH05000W Wide-Output Adjust Power Modules The Vo Adjust control (pin 4) sets the output voltage of the PTH05000Wproduct. The adjustment range is from 0.9 V to 3.6 V. The adjustment method requires the addition of a single external resistor, Rset, that must be connected directly between the Vo Adjust and GND pins 1. Table 1-1 gives the preferred value of the external resistor for a number of standard voltages, along with the actual output voltage that this resistance value provides. 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 1-2. Figure 1-1 shows the placement of the required resistor. Rset = 10 kΩ · 0.891 V Vout – 0.9 V – 3.24 kΩ Table 1-1; Preferred Values of Rset for Standard Output Voltages Vout (Standard) Rset (Pref’d Value) 3.3 V 2.5 V 2V 1.8 V 1.5 V 1.2 V 1V 0.9 V 475 Ω 2.32 kΩ 4.87 kΩ 6.65 kΩ 11.5 kΩ 26.1 kΩ 84.5 kΩ Open Vout (Actual) 3.298V 2.502 V 1.999 V 1.801 V 1.504 V 1.204 V 1.001 V 0.9 V Figure 1-1; Vo Adjust Resistor Placement Table 1-2; Output Voltage Set-Point Resistor Values Va Req’d 0.900 0.925 0.950 0.975 1.000 1.025 1.050 1.075 1.100 1.125 1.150 1.175 1.200 1.225 1.250 1.275 1.300 1.325 1.350 1.375 1.400 1.425 1.450 1.475 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 Rset Open 353 kΩ 175 kΩ 116 kΩ 85.9 kΩ 68.0 kΩ 56.2 kΩ 47.7 kΩ 41.3 kΩ 36.4 kΩ 32.4 kΩ 29.2 kΩ 26.5 kΩ 24.2 kΩ 22.2 kΩ 20.5 kΩ 19.0 kΩ 17.7 kΩ 16.6 kΩ 15.5 kΩ 14.6 kΩ 13.7 kΩ 13.0 kΩ 12.3 kΩ 11.6 kΩ 10.5 kΩ 9.49 kΩ 8.64 kΩ 7.90 kΩ 7.24 kΩ 6.66 kΩ 6.14 kΩ 5.67 kΩ 5.25 kΩ Va Req’d 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 2.65 2.70 2.75 2.80 2.85 2.90 2.95 3.00 3.05 3.10 3.15 3.20 3.25 3.30 3.35 3.40 3.45 3.50 3.55 3.60 Rset 4.86 kΩ 4.51 kΩ 4.19 kΩ 3.89 kΩ 3.61 kΩ 3.36 kΩ 3.12 kΩ 2.90 kΩ 2.70 kΩ 2.51 kΩ 2.33 kΩ 2.16 kΩ 2.00 kΩ 1.85 kΩ 1.71 kΩ 1.58 kΩ 1.45 kΩ 1.33 kΩ 1.22 kΩ 1.11 kΩ 1.00 kΩ 904 Ω 810 Ω 720 Ω 634 Ω 551 Ω 473 Ω 397 Ω 324 Ω 254 Ω 187 Ω 122 Ω 60 Ω 4 V O Adj 2 VIN PTH05000W Inhibit CIN 330µF (Required) 3 VO 5 VOUT GND 1 RSET 0.1 W, 1 % + VIN COUT 100µF (Optional) + Inhibit GND GND For technical support and more information, see inside back cover or visit www.ti.com Notes: 1. Use a 0.1 W resistor. 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 1 using dedicated PCB traces. 2. Never connect capacitors from Vo Adjust to either GND or Vout. Any capacitance added to the Vo Adjust pin will affect the stability of the regulator. Application Notes PTH05000 Series Capacitor Recommendations for the PTH05000 Series of 6-A Power Modules Input Capacitors The recommended input capacitance is determined by 300 mA (rms) minimum ripple current rating, less than 300 mΩ equivalent series resistance (ESR) and 330 µF minimum capacitance. The ripple current rating, ESR, and operating temperature are the major considerations when selecting the input capacitor. It is recommended that tantalum capacitors have a minimum voltage rating of at least twice the working voltage, including the ac ripple. This is necessary to insure reliability with 5-V input voltage bus applications. Output Capacitors (optional) The ESR of the output bulk (non-ceramic) capacitance must be between 10 mΩ ≤ESR ≤200 mΩ. Electrolytic capacitors have poor ripple performance at frequencies greater than 400 kHz but excellent low frequency transient response. Above the ripple frequency, ceramic decoupling capacitors are recommended to improve the transient response and reduce any high frequency noise components apparent during higher current excursions. A maximum of 100 µF ceramic capacitance may be added to the output bus. Tantalum/ Ceramic Capacitors Tantalum capacitors are acceptable on the output bus. Either tantalum, Os-con®, or ceramic capacitor types are recommended for applications where ambient temperatures fall below 0 °C. Ceramic capacitors may be used instead of electrolytic types on both the input and output bus. The input bus must have at least the minimum amount of capacitance. For the output bus, the total amount of ceramic capacitance should be limited to 100 µF. Capacitor Table Table 1-1 identifies capacitors with acceptable ESR and maximum allowable ripple current (rms) ratings. Capacitors recommended for the output are identified under the Output Bus column with the required quantity. This is not an extensive capacitor list. Capacitors from other vendors are available with comparable specifications. Those listed are for guidance. The RMS ripple current rating and ESR (at 100 kHz) are critical parameters necessary to insure both optimum regulator performance and long capacitor life. Table 1-1; Recommended Input/Output Capacitors Capacitor Vendor/ Component Series Capacitor Characteristics Quantity Working Voltage Value (µF) (ESR) Equivalent Series Resistance 85°C Maximum Ripple Current (Irms) Physical Size (mm) Input Bus Output Bus Panasonic WA (SMT) FC 10 V 10 V 330 µF 330 µF 0.035 Ω 0.117 Ω 2800mA 555mA 8×6.9 8×11.5 1 1 1 1 EEFWA1A121P EEUFC1A331 Panasonic FK (SMT) 16 V 25 V 330 µF 330 µF 0.160 Ω 0.160 Ω 600 mA 600 mA 8×10.2 8×10.2 1 1 1 1 EEVFK1C331P EEVFK1E331P United Chemi–con PXA (SMT) FS LXZ (SMT) MVZ 10 V 10 V 16 V 25 V 330 µF 330 µF 330 µF 330 µF 0.024 Ω 0.025 Ω 0.120 Ω 0.170 Ω 3770 mA 3500 mA 555 mA 450 mA 10×7.7 10×10.5 8×12 8×10 1 1 1 1 1 1 1 1 PXA10VC331MJ80TP 10FS330M LXZ16VB331M8x12LL MVZ25VC331MH10TP Nichicon UWG (SMT) NA PM 16V 10 V 10 V 330 µF 470 µF 330 µF 0.150 Ω 0.018 Ω 0.160 Ω 670 mA >3100 mA 460 mA 10x10 10×10 8×11.5 1 1 1 1 1 1 UWG1C331MNR1GS PNA1A471M1 UPM1A331MHH Sanyo Os-con® SVP (SMT) SP 10 V 10 V 330 µF 470 µF 0.025 Ω 0.015 Ω >3700 mA >4500 mA 10×8 10×10.5 1 1 1 1 10SVP330MX 10SP470M AVX Tantalum TPS 10 V 10 V 330 µF 330 µF 0.100 Ω 0.060 Ω >1100 mA >2000 mA 7.3L ×4.3W ×4.1H 1 1 1 1 TPSV337M010R0100 TPSV337M010R0060 Kemet T520 10 V 10 V 330 µF 330 µF 0.035 Ω 0.040 Ω > 1200 mA >1100 mA 7.3L ×5.7W ×4.0H 1 1 1 1 T510X337M010AS T520X337M010AS Sprague 594D/595D 10 V 10 V 330 µF 330 µF 0.045 Ω 0.140 Ω >1400 mA >1000 mA 7.3L ×6.0W ×4.1H 1 1 1 1 594D337X0010R2T 595D337X0010D2T TDK- Ceramic X5R Murata Ceramic X5R (1210 Case) 6.3 V 6.3 V 47 µF 47 µF 0.002 Ω 0.002 Ω >1400 mA >1000 mA 3.6L ×2.8W ×2.8H 6 6 T495 Vendor Number 2 (max) C3225X5R0J476KT/MT 2 (max) GRM32ER60J476M/6.3 For technical support and more information, see inside back cover or visit www.ti.com Application Notes PTH03000 & PTH05000 Series Power-Up Characteristics When configured per their standard application, the PTH03000 and PTH05000 series of power modules will produce 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. The soft-start circuitry introduces a short time delay (typically 10 ms) into the power-up characteristic. This is from the point that a valid input source is recognized. Figure 3-1 shows the power-up waveforms for a PTH05000W (5-V input), with the output voltage set point adjusted for a 2-V output. The waveforms were measured with a 5-A resistive load. The initial rise in input current when the input voltage first starts to rise is the charge current drawn by the input capacitors. Figure 3-1 Vin (2 V/Div) Output On/Off Inhibit For applications requiring output voltage on/off control, the PTH03000W & PTH05000W power modules incorporate an output on/off Inhibit control (pin 3). 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 Vin with respect to GND. Figure 3-2 shows the typical application of the inhibit function. Note the discrete transistor (Q1). The Inhibit control has its own internal pull-up to Vin potential. 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 will execute a soft-start power-up sequence. A regulated output voltage is produced within 20 msec. Figure 3-3 shows the typical rise in the output voltage, following the turn-off of Q1. The turn off of Q1 corresponds to the fall in the waveform, Q1 Vgs. The waveforms were measured with a 5-A resistive load. Vo (1 V/Div) Figure 3-2 4 VO Adj VIN =5 V 2 PTH05000W Inhibit + HORIZ SCALE: 5 ms/Div Current Limit Protection The PTHxx000W modules protect against load faults with a continuous current limit characteristic. 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 be progressively reduced. Current is continuously supplied to the fault until it is removed. Upon removal of the fault, the output voltage will promptly recover. Thermal Shutdown Thermal shutdown protects the module’s 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 sustained current limit condition. If the junction temperature of the internal components exceed 150 °C, the module will shutdown. This reduces the output voltage to zero. The module will start up automatically, by initiating a soft-start power up when the sensed temperature decreases 10 °C below the thermal shutdown trip point. For technical support and more information, see inside back cover or visit www.ti.com VO =2 V 5 VIN CIN 330 µF (Required) Q1 BSS138 3 VO GND + Iin (2 A/Div) 1 COUT 100 µF (Optional) 4k87 0.1 W, 1 % Inhibit GND GND Figure 3-3 Vo (1 V/Div) Q1 Vgs (10 V/Div) HORIZ SCALE: 5 ms/Div L O A D Application Notes PTH05000W PTH05000W Startup with Output Pre-Bias 2. To ensure that the regulator does not sink current, the input voltage must always be greater or equal to the output voltage throughout the power-up and power-down sequence. A pre-bias startup condition occurs as a result of an external voltage being present at the output of the power module prior to its output voltage rising. This often occurs in complex digital systems when current from another power source is backfed through a dual-supply logic component such as an FPGA or ASIC. Another path might be via clamp diodes (to a higher supply voltage) as part of a sequential power-up arrangement. 3. If during power up, the backfeeding source is greater than the module’s set-point voltage, the module’s output voltage will remain higher than its set point. The output will remain out of regulation until the backfeeding source is either reduced in voltage or removed. An output prebias can cause problems with power modules that incorporate synchronous rectifiers. This is because under most operating conditions, they can sink as well as source ouput current. Although the PTH05000W (5-V input) power module can sink current under normal operation, it will not do so during startup. 1 This is true as long as certain conditions are maintained. 2 Figure 3-1 shows an application schematic that demonstrates this capability. Figure 3-2 shows the waveforms of the circuit after input power is applied. Note that the module’s output current (Io) is never negative. Only positive current is sourced. This occurs when the output voltage is raised above that which is backfed from the 5-V input supply, via the diodes D1 through D4. 3 Figure 3-2; Start-up with Output Pre-Bias Vin (1 V/Div) Vo (1 V/Div) Io (2 A/Div) Notes 1. Start up includes both the application of a valid input source voltage, or the removal of a ground signal from the Inhibit* control (pin 3) with a valid input source applied. The output of the regulator is effectively off (tri-state), during the period that the Inhibit* control is held low. HORIZ SCALE: 5 ms/Div Figure 3-1; Schematic Demonstrating Startup with Output Pre-Bias D 1 - D4 MUR460 4 V O Adj 2 V IN PTH05000W Inhibit 3 CIN 330 µF (Required) VO 5 VO =2.5 V GND 1 + VIN =5 V 2k32 0.1 W, 1 % C OUT 100 µF (Optional) L O A D 0.55 Ω Resistive + Inhibit GND GND For technical support and more information, see inside back cover or visit www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. 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