For assistance or to order, call Application Notes Mechanical Outline Product Selector Guide (800) 531-5782 PT6400 Series 3 AMP ADJUSTABLE INTEGRATED SWITCHING REGULATOR • • • • Single-Device 5V to 3V Power 85% Efficiency Small SIP Footprint Adjustable Output Voltage The PT6400 is a high performance +5V to +3.3V, 3 Amp, 12-Pin SIP (Single In-line Package) Integrated Switching Regulator (ISR) designed for stand alone (not parallelable) operation. This highperformance ISR allows easy integration Pin-Out Information Pin Function Standard Application V IN 2,3,4 PT6400 V OUT 9,10,11 R1 C1 100µF + 5,6,7,8 12 (V O UP) C2 100µF + R2 (V O DOWN) COM COM C1 = Required 100µF electrolytic C2 = Required 100µF electrolytic 1 Do not connect 2 Vin 3 Vin 4 Vin 5 GND 6 GND 7 GND 8 GND 9 Vout 10 Vout 11 Vout 12 VoutAdjust Revised 5/15/98 of low-power 3.3V logic IC’s into existing 5V systems without redesigning the central power supply. Only two external capacitors are required for proper operation. The output voltage is easily adjustable with one external resistor. The PT6406,7,8 can be used to terminate high-speed data buses such as Futurebus (+2.1V) or the new GTL (+1.2V) logic buses. Please note that this product does not include short circuit protection. Ordering Information PT Series Suffix (PT1234X) PT6404¨ PT6405¨ PT6406¨ PT6407¨ PT6408¨ PT6409¨ Case/Pin Configuration Vertical Through-Hole Horizontal Through-Hole Horizontal Surface Mount = +1.5 Volts = +3.3 Volts = +1.8 Volts = +2.1 Volts = +1.2 Volts = +2.5 Volts P D E Pkg Style 300 PT6400 Note: Back surface of product is conducting metal. Specifications PT6400 SERIES Characteristics (Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io 4.5V ≤ V in ≤ 5.5V 0.1* — 3.0 A Current Limit Icl Vin = +5V — 3.6 5.0 A Input Voltage Range Vin 0.1A ≤ Io ≤ 3.0A 4.5 — 5.5 V Output Voltage Tolerance ∆Vo Vin = +5V, Io = 3.0A 0°C ≤ Ta ≤ +70°C Vo-0.05 — Vo+0.05 V Line Regulation Regline 4.5V ≤ Vin ≤ 5.5V, Io = 3.0A — ±10 ±25 mV Load Regulation Regload Vin = +5V, 0.3 ≤ Io ≤ 3.0A — ±10 ±25 mV Vo Ripple/Noise Vn Vin = 5V, Io = 3.0A — 66 165 mV Transient Response with C2 = 100µF ttr Vos Io step between 1.5A and 3.0A Vo over/undershoot — — 200 200 — — µSec mV Efficiency η Vin = +5V, Io = 1.5A — — — — 85 74 77 63 — — — — % % % % Switching Frequency ƒo 4.5V ≤ V in ≤ 5.5V 0.3A ≤ Io ≤ 3.0A 500 650 800 kHz Absolute Maximum Operating Temperature Range Ta 0 — +85 °C Recommended Operating Temperature Range Ta 0 — + 70** °C Vo= 3.3V Vo= 1.8V Vo= 2.1V Vo= 1.2V Free Air Convection (40-60 LFM) At Vin= 5V, Io=2.5A Thermal Resistance θja Free Air Convection (40-60 LFM) — 25 — °C/W Storage Temperature Ts — -40 — +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 , 1 msec, Half Sine, mounted to a fixture — 500 — G’s Mechanical Vibration Per Mil-STD-883D, Method 2007.2, 20-2000 Hz, Soldered in a PC board — — 15 — G’s — 6.5 — grams Weight — *ISR will operate down to no load with reduced specifications **See Thermal Derating chart. Note: The PT6400 Series requires two 100µF electrolytic or tantalum capacitors for proper operation in all applications. 24 Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com (800) 531-5782 For assistance or to order, call PT6400 CHARACTERISTIC DATA Efficiency vs Output Current Efficiency vs Output Current 90 Efficiency vs Output Current 90 90 5.0V 5.5V 60 50 80 4.5V 5.0V 70 5.5V 60 Efficiency - % 4.5V 70 V in Vin Efficiency - % 50 40 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Ripple vs Output Current 80 60 Vin 5 .5V 40 5 .0V Ripple-(mV) 80 0.5 1 1.5 2 2.5 3 0 0.5 1 2 2.5 5.5V 5.0V 40 4.5V Vin 5.5V 60 5.0V 40 4.5V 20 0 0.5 1 Iout-(Amps) Thermal Derating (Ta) 1.5 2 2.5 0 3 0.5 1 Iout-(Amps) Thermal Derating (Ta) (See Note 2) 3 80 Vin 0 3 2.5 Ripple vs Output Current 60 3 2 100 0 0 1.5 Iout-(Amps) 20 4 .5V 20 1.5 5.5V Ripple vs Output Current 100 1 5.0V 60 Iout-(Amps) 100 0.5 4.5V 70 40 0 Iout-(Amps) 0 80 50 40 Ripple-(mV) Efficiency - % Vin 80 (See Note 1) 100 10 0 10 0 Ripple-(mV) PT6405, 3.3 VDC (See Note 1) 1.5 2 2.5 3 Iout-(Amps) Thermal Derating (Ta) (See Note 2) 3 (See Note 2) 85°C 3 85°C 85°C 2.5 2 1.5 1 0.5 2.5 Iout-(Amps) Iout-(Amps) 2 1.5 1 4.5 4 .7 5 5 5 .2 5 4.5 5.5 4.75 Vin-(Volts) Power Dissipation vs Output Current 5.25 4.5 5.5 Power Dissipation vs Output Current Vin 5.5V 5.0V 1.5 4.5V 1.0 1.0 1.5 2.0 Iout-(Amps) 2.5 3.0 5.5 2 Vin 5 .5 V 1.5 5 .0 V 4 .5 V 1 5.5V 1.5 5.0V 1 4.5V 0.5 0 0.0 5.25 Power Dissipation vs Output Current Vin 0.5 0.5 5 2.5 2 PD-(Watts) 2.0 0.5 4.75 Vin-(Volts) 2.5 2.5 PD-(Watts) 5 Vin-(Volts) 3.0 0.0 1 0 0 0 2 1.5 0.5 0.5 PD-(Watts) Iout-(Amps) 2.5 0 0 0.5 1 1.5 2 2.5 3 0 0.5 1 Iout-(Amps) 1.5 2 2.5 3 Iout-(Amps) Note 1: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the ISR. Note 2: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.) Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http:// www.powertrends.com 25 DATA SHEETS PT6407, 2.1 VDC (See Note 1) 5V5V to Bus 3.x Converters Products PT6408, 1.2 VDC Series For assistance or to order, call Application (800) 531-5782 Notes PT6400 Series More Applcation Notes Adjusting the Output Voltage of the PT6400 Series 3AMP 5V Bus Converters Figure 1 The output voltage of the Power Trends PT6400 Series ISRs may be adjusted higher or lower than the factory trimmed preset voltage with the addition of a single external resistor. Table 1 accordingly gives the allowable adjustment range for each model in the series as Va (min) and Va (max). 2,3,4 Vin Vin PT6400 GND 5,6,7,8 Vo 9,10,11 Vo Vo(adj) 12 R1 Adjust Up C1 1 0 0 µF Adjust Up: (See note 1) An increase in the output voltage is obtained by adding a resistor R1, between pin 12 (Vo adjust) and pins 9-11 (Vout). + C2 1 0 0 µF (R2) Adj Down COM Adjust Down: (See note 1) Add a resistor (R2), between pin 12 (Vo adjust) and pins 5-8 (GND). + COM The values of R1 [adjust up], and (R2) [adjust down], can also be calculated using the following formulae. 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. The direction in which each resistor adjusts the output of the PT6400 series differs from many other Power Trends products. These output voltage adjustment notes are therefore specific only to the PT6400 models. 2. Use only a single 1% resistor in either the R1 or (R2) location. Place the resistor as close to the ISR as possible. 3. 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 ISR. R1 = 12.45 Vo (Va – Vo) (R2) = 12.45 (2Va – Vo) Vo – Va Where: Vo = Original output voltage Va = Adjusted output voltage – 49.9 kΩ – 49.9 kΩ 4. An increase in the output voltage may place additional limits on the input voltage range of the part. The revised minimum input voltage will be (Vout + 1.2) or 4.5V, whichever is higher. Do not exceed 5.5Vdc. Table 1 PT6400 ADJUSTMENT RANGE Series Pt # PT6408 PT6404 PT6406 PT6407 PT6409 PT6405 Vo (nom) 1.2 1.5 1.8 2.1 2.5 3.3 Va (min) 1.1 1.3 1.5 1.8 2.1 2.8 Va (max) 1.4 1.8 2.2 2.6 3.1 3.8 Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com 3 For assistance or to order, call (800) 531-5782 Application PT6400 Series Notes Table 2 PT6400 ADJUSTMENT RESISTOR VALUES Series Pt # Vo (nom) Va (req’d) PT6408 1.2 1.1 (74.6)kΩ 1.15 (224.0)kΩ PT6404 1.5 PT6406 1.8 PT6407 2.1 PT6409 2.5 PT6405 3.3 1.2 1.25 249.0kΩ 1.3 99.5kΩ 1.35 49.7kΩ (49.7)kΩ 1.4 24.8kΩ (112.0)kΩ 1.45 (18.6)kΩ (299.0)kΩ 1.5 (0.0)kΩ 1.55 324.0kΩ (14.8)kΩ 1.6 137.0kΩ (37.3)kΩ 1.65 74.6kΩ (74.6)kΩ 1.7 43.5kΩ (149.0)kΩ 1.75 24.8kΩ (373.0)kΩ 1.8 12.4kΩ (12.4)kΩ 1.85 398.0kΩ (29.8)kΩ 1.9 174.0kΩ (55.9)kΩ 1.95 99.5kΩ (99.5)kΩ 2.0 62.2kΩ (187.0)kΩ 2.05 39.7kΩ (448.0)kΩ 2.1 24.8kΩ 2.15 14.1kΩ 473.0kΩ (14.1)kΩ 2.2 6.1kΩ (3.0)kΩ 212.0kΩ (29.0)kΩ 2.25 124.0kΩ (49.7)kΩ 2.3 80.8kΩ (80.8)kΩ 2.35 54.7kΩ (133.0)kΩ 2.4 37.3kΩ (236.0)kΩ 2.45 24.8kΩ (548.0)kΩ 2.5 15.5kΩ 2.55 8.2kΩ 573.0kΩ 2.6 2.4kΩ 261.0kΩ 2.65 158.0kΩ 2.7 106.0kΩ 2.75 74.6kΩ 2.8 53.9kΩ (7.4)kΩ 2.85 39.0kΩ (16.5)kΩ 2.9 27.9kΩ (27.9)kΩ 2.95 19.3kΩ (42.6)kΩ 3.0 12.4kΩ (62.2)kΩ 3.1 2.0kΩ (131.0)kΩ 3.2 (336.0)kΩ 3.3 3.4 361.0kΩ 3.5 156.0kΩ 3.6 87.0kΩ 3.7 52.8kΩ 3.8 R1 = Black 4 32.3kΩ R2 = (Red) Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com 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. 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