PT6705 Series 13 Amp 5V/3.3V Input Adjustable Integrated Switching Regulator SLTS099 (Revised 6/30/2000) kage ving Pac a S e c a p New S • • • • • • • The PT6705 is a series of low-cost, high-performance, 13 Amp Integrated Switching Regulators (ISRs) housed in a unique, space-saving 17-pin SIP package. The PT6705 will operate off either a 5V or 3.3V input bus to provide a low-voltage power source for the industry’s latest highspeed, low-voltage µPs, and bus drivers. The PT6705 incorporates internal short circuit protection, and requires a +12V/50mA bias input for operation. +3.3V/5V input (+12V Bias) Adjustable Output Voltage 90% Efficiency Differential Remote Sense 17-pin Space-Saving Package Solderable Copper Case Short Circuit Protection Patent pending on package assembly Standard Application Pin-Out Information STBY* Vout Adjust +12V BIAS REMOTE SENSE (+) 3 L1 VIN 4-6 1H CIN 2 PT6705 VOUT 13 - 16 7 8 - 12 + 17 1 COUT + LOAD REMOTE SENSE (-) GND Pin Function Pin Function 1 2 Vout Adjust STBY* 10 GND 11 GND 3 4 +12V Bias Input Vin 12 13 GND Vout 5 6 Vin Vin 14 15 Vout Vout 16 17 Vout 7 Remote Sense Gnd 8 GND 9 GND (4) Remote Sense Vout For STBY* pin open = output enabled ground = output disabled. GND Cin = Required 1000µF electrolytic Cout= Required 330µF electrolytic L1 = Optional 1µH input choke Specifications PT6705 SERIES Characteristics (Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io Ta = +60°C, 200 LFM, pkg N Ta = +25°C, natural convection 0.1 (1) 0.1 (1) — — 13.0 13.0 A Input Voltage Range Vin 0.1A ≤Io ≤13A 4.5 3.1 — — 5.5 5.5 V External Bias Voltage Range Vb 0.1A ≤Io ≤13A, –40°C ≤Ta ≤+85°C 11.5 12.0 13.0 V External Bias Current Ib 0.1A ≤Io ≤13A, –40°C ≤Ta ≤+85°C — — 50 mA Output Voltage Tolerance ∆Vo Vin = +5V, Vb = +12V, Io =13A -40°C ≤ Ta ≤ +85°C Vo-0.03 — Vo+0.03 V Short-Circuit Threshold Isc Vin = +5V, Vb = +12V — 18 30 A Line Regulation Regline 4.5V ≤Vin ≤ 5.5V, Vb = +12V, Io =13A — ±5 — mV Load Regulation Regload Vin = +5V, Vb = +12V, 0.1 ≤Io ≤13A — ±10 — mV Vo Ripple/Noise Vn Vin = +5V, Vb = +12V, Io =13A — 35 — mV Transient Response with Cout = 330µF ttr Vos Io step between 6.5A and 13A Vo over/undershoot — — 50 100 — — µSec mV Efficiency η Vin = +5V, Io = 9A, Vb =+12V — — — — 91 88 85 83 — — — — % PT6705/6 PT6707/8 Vo Vo Vo Vo = 3.3V = 2.5V = 1.8V = 1.5V Switching Frequency ƒo 4.5V ≤Vin ≤5.5V, Vb = +12V 0.1A ≤ I o ≤ 13A 300 350 400 kHz Absolute Maximum Operating Temperature Range Ta Over Vin Range -40 (2) — +85 (3) °C Storage Temperature Ts — -40 — +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 1msec, Half sine, mounted to a fixture — 500 — G Mechanical Vibration Per Mil-STD-883D, Method 2007.2, 20-2000 Hz, Soldered in a PC board — 15 — G — — 26 — grams Weight — Notes: (1) The ISR-will operate down to no load with reduced specifications. (2) For operation below 0°C, Cin and Cout must have stable characteristics. Use either low ESR tantalum or Oscon® capacitors. (3) See Safe Operating Area curves, or contact the factory for appropriate derating. (4) If the remote sense ground is not used, pin 7 must be connected to pin 8 for optimum output voltage accuracy. For technical support and more information, see inside back cover or visit www.ti.com/powertrends PT6705 Series 13 Amp 5V/3.3V Input Adjustable Integrated Switching Regulator PT Series Suffix (PT1234X) Ordering Information PT6705❏ ❏ = 3.3 Volts ❏ = 2.5 Volts PT6706❏ ❏ = 1.8 Volts PT6707❏ ❏ = 1.5 Volts PT6708❏ PT6700 Product Family Case/Pin Configuration Vertical Through-Hole N Horizontal Through-Hole A Horizontal Surface Mount C (For dimensions and PC board layout, see Package Styles 1340 and 1350.) Input Voltage Vout Adjust OVP/ Pwr Good PT6701 5V VID ✓ PT6702 3.3V VID ✓ PT6705 5V Resistor PT6715 5V Resistor PT6721 12V VID PT6725 12V Resistor Requires +12V Bias ✓ ✓ Filter/Capacitor Selection Output Capacitors: The PT6705 requires a minimum ouput capacitance of 330µF for proper operation. The maximum allowable output capacitance is 15,000µF. Input Filter: An input filter is optional for most applications. The input inductor must be sized to handle 10ADC with a typical value of 1µH. The input capacitance must be rated for a minimum of 2.0Arms of ripple current. For transient or dynamic load applications, additional capacitance may be required. T Y P I C A L All Models, Vin =5.0V C H A R A C T E R I S T I C S PT6707, PT6708, Vin =3.3V (Note A) Efficiency vs Output Current Efficiency vs Output Current 100 100 95 95 90 Efficiency - % Vout 85 3.3V 2.5V 1.8V 1.5V 80 75 Efficiency - % 90 85 Vout 1.8V 1.5V 80 75 70 70 65 65 60 60 0 2 4 6 8 10 12 14 0 2 4 6 Power Dissipation vs Output Current 10 12 14 Power Dissipation vs Output Current 6 6 5 5 4 Vout 3.3V 1.5V 3 4 Pd - Watts Pd - Watts 8 Iout (A) Iout (A) Vout 1.8V 1.5V 3 2 2 1 1 0 0 0 2 4 6 8 10 12 14 0 2 4 Iout (A) 6 8 10 12 14 Iout (A) Safe Operating Area, PT6705, Vin =5.0V (Note B) Safe Operating Area, PT6707, Vin =3.3V 90.0 90.0 80.0 80.0 70.0 Airflow 200LFM 120LFM 60LFM Nat conv 60.0 50.0 40.0 Ambient Temperature ( C) Ambient Temperature ( C) (Note A) 70.0 (Note B) Airflow 200LFM 120LFM 60LFM Nat conv 60.0 50.0 40.0 30.0 30.0 20.0 20.0 0.0 2.0 4.0 6.0 8.0 Iout (A) 10.0 12.0 14.0 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 Iout (A) Note A: All data in the above graphs has been developed from actual products tested at 25°C. This data is considered typcial for the ISR. 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/powertrends Application Notes PT6705/6715 Series Adjusting the Output Voltage of the PT6705 and PT6715 Excalibur™ Converters Both the PT6705 and PT6715 series ISRs are non-programmable versions of the PT6700 Excalibur™ family of converters. These regulators have a fixed output voltage, which may be adjusted higher or lower than the factory trimmed pre-set voltage using a single external resistor. Table 1 gives the allowable adjustment range for each model as Va (min) and Va (max). 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). Adjust Down: Add a resistor (R1), between pin 1 (Vo adjust) and pin 17 (+Remote Sense). Refer to Figure 1 and Table 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 ISR as possible. 2. Never connect capacitors from Vo adjust to either GND, Vout, or the Remote Sense pins. Any capacitance added 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. 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. 5. Adjusting the output voltage of the PT6705 and PT6715 (3.3V models) higher than the factory pretrimmed output voltage may require an increase in the minimum input voltage. These two models must comply with the following requirements for Vin(min). PT670x models: = (Va + 1)V Vin(min) Figure 1 Bias (Req’d for PT6705) 4,5,6 +5V 2 3 17 Stby* V Bias Sns(+) PT6705/PT6715 V in GND 8 12 Vo(adj) 1 V out Sns(-) 7 13 16 Vo (R1) Adj Down + + C in L O A D C out R2 Adjust Up COM COM The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulas. (R1) = R2 = Where: Vo Va Rs 10⋅(Va – 1.27) (Vo – Va) 12.7 Va - Vo kΩ – Rs kΩ – Rs = Original output voltage = Adjusted output voltage = Series resistance value from Table 1 Table 1 PT6705/PT6715 SERIES ADJUSTMENT PARAMETERS Series Pt # 12V Bias (4) No-Bias PT6708 PT6718 PT6707 PT6717 PT6706 PT6716 PT6705 PT6715 Vo (nom) Va (min) 1.5 1.8 2.5 3.3 1.47 1.75 2.25 2.75 Va (max) Ω) Rs (kΩ 1.73 2.0 2.85 3.75 PT671x models: Vin(min) = (Va + 1)V or 4.5V, whichever is greater. For technical support and more information, see inside back cover or visit www.ti.com/powertrends 49.9 49.9 33.2 24.9 Application Notes continued PT6705/6715 Series Table 2 PT6705/PT6715 SERIES ADJUSTMENT RESISTOR VALUES Series Pt # 12V Bias 4 No Bias Vo (nom) Va (req’d) PT6708 PT6718 1.5 1.47 (16.8)kΩ PT6707 PT6717 1.8 PT6706 PT6716 2.5 PT6705 PT6715 3.3 1.5 1.55 204.0kΩ 1.6 77.1kΩ 1.65 34.8kΩ 1.7 13.6kΩ 1.75 (46.1)kΩ 1.8 1.85 204.0kΩ 1.9 77.1kΩ 1.95 34.8kΩ 2.0 13.6kΩ 2.05 2.1 2.15 2.2 2.25 (6.0)kΩ 2.3 (18.3)kΩ 2.35 (38.8)kΩ 2.4 (79.8)kΩ 2.45 (203.0)kΩ 2.5 2.55 221.0kΩ 2.6 93.8kΩ 2.65 51.5kΩ 2.7 30.3kΩ 2.75 17.6kΩ 2.8 9.1kΩ (5.7)kΩ 2.85 3.1kΩ (10.2)kΩ (2.0)kΩ 2.9 (15.9)kΩ 2.95 (23.1)kΩ 3.0 (32.8)kΩ 3.05 (46.3)kΩ 3.1 (66.6)kΩ 3.15 (100.0)kΩ 3.2 (168.0)kΩ 3.25 (371.0)kΩ 3.3 3.35 229.0kΩ 3.4 102.0kΩ 3.45 59.8kΩ 3.5 38.6kΩ Requires Vin > 4.5Vdc 5 3.55 25.9kΩ 3.6 17.4kΩ 3.65 11.4kΩ 3.7 6.9kΩ 3.75 R1 = (Blue) 3.3kΩ R2 = Black For technical support and more information, see inside back cover or visit www.ti.com/powertrends Package S tyle 1340 S uffix N (Revised 6/30/2000) PACKAGE INFORMATION AND DIMENSIONS Power Trends proprietary package design. All rights reserved. Patent pending. For technical support and more information, see inside back cover or visit www.ti.com/powertrends Package S tyle 1350 S uffix A, C (Revised 6/30/2000) PACKAGE INFORMATION AND DIMENSIONS Power Trends proprietary package design. All rights reserved. Patent pending. For technical support and more information, see inside back cover or visit www.ti.com/powertrends 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. 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