PT6715 Series 13-A 5V/3.3V-Input Adjustable Integrated Switching Regulator SLTS100B (Revised 9/5/2002) Features • • • • • • • • • 13-A Output Current Single Device: 3.3V/5V Input 90% Efficiency (PT6715) On/Off Standby Function Differential Remote Sense Adjustable Output Voltage Short Circuit Protection 17-pin Space-Saving Package Solderable Copper Case Description Ordering Information The PT6715 series of power modules are a 13-A rated integrated switching regulator (ISR), housed in a 17-pin space saving solderable copper package. These modules will operate off either a 5V or 3.3V input power bus to provide a highperformance low-voltage power source for the industry’s latest high-speed, DSPs, µPs, and bus drivers. This allows for the easy integration of these new low-voltage ICs into existing 3.3V or 5V systems without re-designing the central power supply. The series includes the standard output bus voltage options, ranging from 1.0V to 3.3V. Each output voltage option has a limited adjust range. Features include a Standby (On/Off) function, a differential output Remote Sense, and short circuit protection. The modules are available in both throughhole and surface mount configurations. PT6715H PT6716H PT6717H PT6718H PT6719H PT6714H † † † † = = = = = = Pin-Out Information Pin 3.3 Volts 2.5 Volts 1.8 Volts 1.5 Volts 1.2Volts 1.0Volts † 3.3V Input Bus Capable PT Series Suffix (PT1234 x ) Case/Pin Configuration Order Suffix Package Code * N A C Vertical Horizontal SMD (EMD) (EMA) (EMC) * Previously known as package styles 1340/50. (Reference the applicable package code drawing for the dimensions and PC board layout) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Function Vo Adjust STBY* Do Not Connect Vin Vin Vin Remote Sense Gnd GND GND GND GND GND Vout Vout Vout Vout Remote Sense Vout * For further information, see application notes. Standard Application STBY* Vout Adjust REMOTE SENSE (+) 2 VIN L1 4-6 1µH CIN + 1 PT6715 8 - 12 17 VOUT 13 - 16 7 COUT + LOAD REMOTE SENSE (-) GND GND Cin = Required 1000µF electrolytic Cout= Required 330µF electrolytic L1 = Optional 1µH input choke For technical support and more information, see inside back cover or visit www.ti.com PT6715 Series 13-A 5V/3.3V-Input Adjustable Integrated Switching Regulator Specifications (Unless otherwise stated, Ta =25°C, Vin =5V, Cin =1,000µF, Cout =330µF, and Io =I omax) PT6715 Series Typ Characteristic Symbol Conditions Min Max Units Output Current Io Vin Set Point Voltage Tolerance Temperature Variation Line Regulation Load Regulation Total Output Voltage Variation Vo tol Regtemp Regline Regload ∆Votot 0.1 (1) 0.1 (1) 4.5 3.1 — — — — — — — — ±1 ±0.5 ±5 ±5 13 13 5.5 5.5 ±1.5 (2) — ±10 ±10 A Input Voltage Range Ta =+60°C, 200LFM Ta =+25°C, natural convection Over Io Range — ±2 ±3 Efficiency η — — — — — — — — — — 300 91 88 85 83 78 75 35 50 ±100 20 350 — — — — — — — — — 32 400 +2.0 –0.1 — — 330 1,000 -40 (4) -40 — — –0.5 25 — — — — Open (3) +0.4 – 35 15,000 — +85 (5) +125 mA mA µF µF °C °C 5.4 — — 106 Hrs — 500 — G’s — — — 15 (6) 20 (6) 23 — — — G’s Vo Ripple (pk-pk) Transient Response Over-Current Threshold Switching Frequency Remote On/Off (Pin 2) Input High Voltage Input Low Voltage Input Low Current Vr ttr ∆Vtr ITRIP ƒs VIH VIL IIL Standby Input Current External Output Capacitance External Input Capacitance Operating Temperature Range Storage Temperature Reliability Iin standby Cout Cin Ta Ts MTBF Mechanical Shock — Mechanical Vibration — Weight Flammability — — –40° ≤Ta ≤ +85°C, Io =Iomin Over Vin range Over Io range Includes set-point, line, load, –40° ≤Ta ≤ +85°C Io =9A Vo ≥ 2.5V Vo ≤ 1.8V Vo =3.3V Vo =2.5V Vo =1.8V Vo =1.5V Vo =1.2V Vo =1.0V 20MHz bandwidth 5A/µs load step, 50% to 100% Iomax Vo over/undershoot Reset, followed by auto-recovery Over Vin and Io range Referenced to –Vin (pin 8) pins 2 & 8 connected See application schematic See application schematic Over Vin range — Per Bellcore TR-332 50% stress, Ta =40°C, ground benign Per Mil-Std-883D, method 2002.3, 1ms, half-sine, mounted to a fixture Mil-Std-883D, Method 2007.2, 20-2000Hz, soldered in PCB Suffix A Suffix C VDC %Vo %Vo mV mV %Vo % mVpp µs mV A kHz V grams Materials meet UL 94V-0 Notes: (1) The ISR will operate at no load with reduced specifications. (2) If the remote sense feature is not being used, connect the Remote Sense Gnd (pin 7) to GND (pin 8) for optimum output voltage accuracy. (3) The STBY* control (pin 2) has an internal pull-up and if it is left open circuit the module will operate when input power is applied. The open-circuit voltage is typcially 12.6V, and maybe as high as 15V. Consult the related application note for other interface considerations. (4) For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors. (5) See Safe Operating Area curves or contact the factory for the appropriate derating. (6) The case pins on through-hole package types (suffixes N & A) must be soldered. For more information consult the applicable package outline drawing. Input/Output Capacitors: The PT6715 series requires a 1,000µF electrolytic (or tantalum) capacitor at the input and 330µF at the output for proper operation in all applications. In addition, the input capacitance, Cin, must be rated for a minimum of 2Arms of ripple current. For transient or dynamic load applications additional capacitance may be necessary. For more information consult the related application note on capacitor recommendations. Input Inductor: An input filter inductor is optioinal for most applications. The inductor must be sized to handle 10ADC with a typical value of 1µH. For technical support and more information, see inside back cover or visit www.ti.com Typical Characteristics PT6715 Series 13-A 5V/3.3V-Input Adjustable Integrated Switching Regulator Characteristic Data; Vin =5.0V Characteristic Data; Vin =3.3V (See Note A) Efficiency vs Output Current Efficiency vs Output Current 100 100 95 95 VOUT 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 85 80 75 90 Efficiency - % 90 Efficiency - % (See Note A) VOUT 85 1.8V 1.5V 1.2V 1.0V 80 75 70 70 65 65 60 60 0 2 4 6 8 10 12 0 2 4 Iout (A) 6 8 10 12 Iout (A) Output Ripple vs Output Current Output Ripple vs Output Current 60 60 50 50 VOUT VOUT Ripple - mV 30 20 40 Ripple - mV 2.5V 3.3V 1.8V 1.5V 1.2V 1.0V 40 1.5V 1.8V 1.2V 1.0V 30 20 10 10 0 0 0 2 4 6 8 10 0 12 2 4 6 8 10 12 Iout (A) Iout (A) Power Dissipation vs Output Current Power Dissipation Output Current 7 7 6 6 V OUT 1.2V 3.3V 2.5V 1.8V 1.0V 1.5V 4 3 2 Pd - Watts Pd - Watts VOUT 5 5 1.2V 1.0V 1.8V 1.5V 4 3 2 1 1 0 0 0 2 4 6 8 10 0 12 2 4 6 Safe Operating Area; Vin =5V (See Note B) 10 12 Safe Operating Area; 3.3V (See Note B) 90 90 80 70 Airflow 200LFM 120LFM 60LFM Nat conv 60 50 40 30 Ambient Temperature (°C) 80 Ambient Temperature (°C) 8 Iout (A) Iout (A) Airflow 70 200LFM 120LFM 60LFM Nat conv 60 50 40 30 20 20 0 2 4 6 8 10 12 Iout (A) 0 2 4 6 8 10 Iout (A) 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 For technical support and more information, see inside back cover or visit www.ti.com 12 Application Notes PT6705 & PT6715 Series Using the On/Off Standby Function on the PT6705/6715 Excalibur™ Series of ISRs Figure 1-1 The PT6705 and PT6715 regulator series are nonprogrammable (preset voltage) versions of the PT6701, PT6702, and PT6703 products. The PT6705/6715 series of products incorporate an on/ off ‘standby’ function, which may be used disable the regulator output. The standby function is provided by the STBY* control, pin 2. If pin 2 is left open-circuit the regulator operates normally, and provides a regulated output when a valid supply voltage is applied to Vin (pins 4–6) with respect to GND (pins 8–12). If pin 2 is connected to ground, the regulator output is disabled and the input current drawn by the ISR typically drops to its idle value 1. The standby control may also be used to hold-off the regulator output during the period that input power is applied. Pin 2 is ideally controlled with an open-collector (or open-drain) discrete transistor (See Figure 1-1 2). The open-circuit voltage will be approximately 12.0V. Table 1-1 gives the circuit parameters for this control input. Table 1-1 Standby Control Requirements (3, 4) Parameter Min Typ Enable (VIH) Disable (VIL) Istby (pin 2 =ground) Vstby (open circuit) — –0.2V Max Open Circuit 0.4V –0.5mA 12.0V 15.0V Notes: 1. When the regulator output is disabled the current drawn from the +Vin input source is typically reduced to 25mA for the PT671x series, and to less than 100µA for the PT670x series. +12V (PT6705 Series Only) 2 Stby* 4,5,6 + V in 17 Sns(+) PT6705 V IN GND 8–12 Vo(adj) 1 V OUT 13–16 V out Sns(-) 7 + + C IN C OUT Q1 BSS138 STBY GND GND Turn-On Time: In the circuit of Figure 1-1, turning Q1 on applies a low voltage to pin 2 and disables the regulator output. Correspondingly, turning Q1 off removes the lowvoltage signal and enables the output 5. Once enabled, the output will typically experience a 10–15ms delay followed by a predictable ramp-up of voltage. The regulator provides a fully regulated output within 40ms. The waveforms of Figure 1-2 show the rise of both the output voltage and input current for a PT6706 (2.5V). The turn off of Q1 corresponds to the rise of Vstby. The waveform was measured with a 5-Vdc input voltage and an 8-ADC load. Figure 1-2 Vo (1V / DIV) 2. Figure 1-1 is an application schematic for the PT670x models. This shows the requirement for an external +12V bias supply. The +12V bias is not required for the PT671x models. For more details, consult the applicable product data sheet. Iin (2A / DIV) 3. The standby control input requires no external pull-up resistor. The open-circuit voltage of the STBY* pin is approximately 12.0V. 4. The standby control input is Not compatible with TTL devices that incorporate a totem-pole output drive. Use only a true open-collector device, preferably a discrete bipolar transistor (or MOSFET). To ensure the regulator output is disabled, the control pin must be pulled to less than 0.4Vdc with a low-level 0.5mA sink to ground. 3 V Bias Vstby (10V / DIV) /DIV 5 After Q1 in Figure 1-1 is turned off and before the output begins to rise, the regulator output will assert a low impedance to ground. If an external voltage is applied to the output it will sink current and possibly over-stress the part. For technical support and more information, see inside back cover or visit www.ti.com Application Notes PT6705/PT6715 Series Adjusting the Output Voltage of the PT6705 and PT6715 Excalibur™ Series of Regulators 4. The PT6705 series requires a 12V external bias voltage in order to operate (see data sheet). An external bias voltage is not required for the PT6715 series. Both the PT6705 and PT6715 series ISRs are nonprogrammable versions of the PT6700 Excalibur™ family of converters. The output voltage of these regulators have a fixed output voltage, which may be adjusted higher or lower than the factory pre-set voltage using a single external resistor. Table 2-1 gives the adjustment range for each model in the series as Va (min) and Va (max). 5. Adjusting the output voltage of the PT6705 and PT6715 (3.3V output) higher than the factory pre-set voltage may require an increase in the minimum input voltage. These two models must comply with the following requirements for Vin(min). Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 1 (Vo Adjust) and pin 7 (Remote Sense GND). Adjust Down: Add a resistor (R1), between pin 1 (Vo Adjust) and pin 17 (Remote Sense Vout). PT6705: Vin(min) = (Va + 1)V PT6715: Vin(min) = (Va + 1)V or 4.5V, whichever is greater. The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulas. Refer to Figure 2-1 and Table 2-2 for both the placement and value of the required resistor, either (R1) or R2 as appropriate. Notes: 1. Use only a single 1% resistor in either the (R1) or R2 location. Place the resistor as close to the regulator as possible. 2. Never connect capacitors from Vo Adjust to either GND, Vout, or the Remote Sense pins. Adding capacitance to the Vo Adjust pin will affect the stability of the ISR. 3. If the Remote Sense feature is not being used, pin 7 must be connected to pin 8 for optimum output voltage accuracy. Correspondingly the resistors (R1) and R2 may be then be connected from Vo Adjust to either Vout or GND respectively. (R1) = Ro ( Va –Vr ) V o – Va R2 = Ro ·Vr Va – Vo Where: Vo Va Vr Ro Rs – Rs Bias (Req'd for PT6705) 4,5,6 +5V V in 3 V Bias 17 Sns(+) PT6705/PT6715 GND 8–12 Vo(adj) Sns(-) 1 7 V out 13–16 Vo (R1) Adj Down + + C in C out R2 Adjust Up COM For technical support and more information, see inside back cover or visit www.ti.com kΩ kΩ = Original output voltage = Adjusted output voltage = Reference voltage (Table 2-1) = Resistance constant (Table 2-1) = Internal series resistance (Table 2-1) Figure 2-1 2 Stby* – Rs L O A D COM Application Notes continued PT6705/PT6715 Series Table 2-1 ADJUSTMENT RANGE AND FORMULA PARAMETERS Series Pt # 12V Bias (4) No Bias — PT6714 — PT6719 PT6708 PT6718 PT6707 PT6717 PT6706 PT6716 PT6705 PT6715 Vo (nom) Va (min) Va (max) Vr (V) Ω) Ro (kΩ Ω) Rs (kΩ 1.0 0.94 1.32 0.8 10.0 24.9 1.2 1.09 1.52 0.8 10.0 24.9 1.5 1.47 1.73 1.27 10.2 49.9 1.8 1.75 2.0 1.27 10.0 49.9 2.5 2.25 2.85 1.27 10.0 33.2 3.3 2.75 3.75 1.27 10.0 24.9 Table 2-2 ADJUSTMENT RESISTOR VALUES Series Pt # 12V Bias (4) No Bias Vo (nom) Va (req’d) 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 2.00 R1 = (Blue) — PT6714 1.0V — PT6719 1.2V PT6708 PT6718 1.5V PT6707 PT6717 1.8V (5.1)kΩ (45.1)kΩ 295.0kΩ 135.0kΩ 81.8kΩ 55.1kΩ 39.1kΩ 28.4kΩ 20.8kΩ 15.1kΩ 10.7kΩ 7.1kΩ 4.2kΩ 1.8kΩ (5.1)kΩ (18.4)kΩ (45.1)kΩ (125.0)kΩ 295.0kΩ 135.0kΩ 81.8kΩ 55.1kΩ 39.1kΩ 28.4kΩ 20.8kΩ 15.1kΩ 10.7kΩ 7.1kΩ 4.2kΩ 1.8kΩ (32.1)kΩ 204.0kΩ 77.1kΩ 34.8kΩ 13.6kΩ (46.1)kΩ 204.0kΩ 77.1kΩ 34.8kΩ 13.6kΩ Series Pt # 12V Bias (4) No Bias Vo (nom) Va (req’d) 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 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 3.65 3.70 3.75 PT6706 PT6716 2.5V PT6705 PT6715 3.3V (6.0)kΩ (18.3)kΩ (38.8)kΩ (79.8)kΩ (203.0)kΩ 221.0kΩ 93.8kΩ 51.5kΩ 30.3kΩ 17.6kΩ 9.1kΩ 3.1kΩ (2.0)kΩ (5.7)kΩ (10.2)kΩ (15.9)kΩ (23.1)kΩ (32.8)kΩ (46.3)kΩ (66.6)kΩ (100.0)kΩ (168.0)kΩ (371.0)kΩ ( Note 5) 229.0kΩ 102.0kΩ 59.8kΩ 38.6kΩ 25.9kΩ 17.4kΩ 11.4kΩ 6.9kΩ 3.3kΩ R2 = Black For technical support and more information, see inside back cover or visit www.ti.com Application Notes PT6701/PT6702/PT6703, PT6705 & PT6715 Series Capacitor Recommendations for the Non-Isolated 13-A Excalibur™ Series of Regulators Input Capacitors The recommended input capacitor(s) is determined by the 2 ampere (rms) minimum ripple current rating and 1,000µF minimum capacitance. Ripple current and ≤100mΩ ESR (Equivalent Series Resistance) values are the major considerations, along with temperature, when selecting the proper capacitor. Tantalum capacitors have a recommended minimum voltage rating of 2× the input voltage; 10V for +5V operation. Output Capacitors The minimum required output capacitance is 330µF with a maximum ESR ≤100mΩ. Failure to observe this requirement may lead to regulator instability or oscillation. Electrolytic capacitors have poor ripple performance at frequencies greater than 400kHz, but excellent low frequency transient response. Above the ripple frequency ceramic decoupling capacitors are necessary to improve the transient response and reduce any high frequency noise components apparent during higher current excursions. Preferred low ESR type capacitor part numbers are identified in Table 3-1 below. Table 3-1 Capacitors Characteristic Data Capacitor Vendor Series Tantalum Characteristics Tantalum capacitors with a minimum 10V rating are recommended for the input bus, but only the AVX TPS, Sprague 594/595, or Kemet T495/T510 series. These types are recommended over many others due to their higher surge current, power dissipation and ripple current capability. As a caution, the TAJ series by AVX is not recommended. This series exhibits considerably higher ESR, reduced power dissipation and lower ripple current capability. The TAJ Series is also less reliable compared to the TPS series when determining power dissipation capability. Tantalum capacitors are highly recommended in applications where ambient temperatures fall below 0°C. Capacitor Table Table 3-1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple current (rms) ratings. The suggested minimum quantities per regulator for both the input and output buses are identified. 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 (Equivalent Series Resistance at 100kHz) are the critical parameters to insure both optimum regulator performance and long capacitor life. 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 FC/FK (Surface Mount) 25V 35V 1000 330 0.038Ω 0.080Ω 2000mA 850mA 18×16.5 10×10.2 1 1 1 EEVFC1E102N EEVFK1V331P FC (Radial) 25V 25V 330 1200 0.090Ω 0.038Ω 755mA 2000mA 10×12.5 18×15 1 1 1 EEUFC1E331 EEUFC1E122S United Chemi-Con LXV (Radial) 25V 35V 16V 330 1200 2700 0.084Ω 0.028Ω 0.028Ω 825mA 2070mA 2070mA 10×16 16×25 16×25 1 1 1 1 1 LXV25VB331M10X16LL LXV35VB122M16X25LL LXV16VB272M16X25LL FX (Surface Mount) 10V 680 0.015Ω÷2 =0.007Ω >7000mA 10×10.5 2 1 10FX680M (Os-con) Nichicon PL Series 25V 25V 330 2200 0.095Ω 0.028Ω 750mA 2050mA 10×15 18×20 1 1 1 UPL1E331MPH6 UPL1E222MHH6 1 UPM1E331MPH6 Vendor Number PM Series 25V 330 0.095Ω 750mA 10×15 Os-con: SS SVP (Surface Mount) 10V 10V 330 330 0.025Ω÷3 =0.008Ω 0.025Ω÷3 =0.008Ω >7000mA >7000mA 10×10.5 10.3×11 3 3 1 1 10SS330M 10SVP330 AVX Tanatalum TPS Series (Surface Mount) 10V 10V 330 330 0.100Ω÷3 =0.034Ω 0.060Ω÷3 =0.020Ω >3500mA >3500mA 7.0 L ×5.97 W ×3.45 H 3 3 1 1 TPSV337M010R0100 TPSV337M010R0060 7.2 L ×6.0 W ×3.5 H 3 1 594D337X0010R2T 2 1 595D687X0010R2T 7.3 L ×4.3 W ×4.0 H 3 1 T510X337M010AS 5 2 T495X227M010AS 5 2 10TPB220M Vishay/Sprague Tantalum 595D/594D Series (Surface Mount) 10V 330 0.045Ω÷3 =0.015Ω >4600mA 10V 680 0.090Ω÷4 =0.023Ω >2500mA Kemet Tantalum T510/T495 Series (Surface Mount) 10V 330 0.035Ω÷3 =0.012Ω >5000mA 10V 220 0.070Ω÷5 =0.035Ω >3000mA Sanyo Poscap TPB (surface Mount) 10V 220 0.040Ω÷5 =0.008Ω >3000mA For technical support and more information, see inside back cover or visit www.ti.com 7.2 L ×4.3 W ×3.1 H 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. 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