PT6400 TI | Alldatasheet
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Technical content
For assistance or to order, call (800) 531-5782 Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com24 Application Notes Mechanical Outline Product Selector Guide Revised 5/15/98 PT6400 Standard Application C1 = Required 100µF electrolytic C2 = Required 100µF electrolytic
Ordering Information
PT6404¤ = +1.5 Volts PT6405¤ = +3.3 Volts PT6406¤ = +1.8 Volts PT6407¤ = +2.1 Volts PT6408¤ = +1.2 Volts PT6409¤ = +2.5 Volts PT Series Suffix (PT1234X) Case/Pin Configuration Vertical Through-Hole P Horizontal Through-Hole D Horizontal Surface Mount E Pin Function
1 Do not connect
5 GND
6 GND
7 GND
8 GND
10 V out
11 V out
12 V outAdjust
- 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 high- performance ISR allows easy integration 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.
3 AMP ADJUSTABLE
INTEGRATED SWITCHING REGULATOR PT6400 Series Pin-Out Information Note: Back surface of product is conducting metal. Specifications Characteristics PT6400 SERIES (Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current I o 4.5V £ Vin £ 5.5V 0.1* — 3.0 A Current Limit I cl Vin = +5V — 3.6 5.0 A Input Voltage Range V in 0.1A £ Io £ 3.0A 4.5 — 5.5 V Output Voltage T olerance D Vo Vin = +5V , Io = 3.0A Vo-0.05 — V o+0.05 V0°C £ Ta £ +70°C Line Regulation Reg line 4.5V £ Vin £ 5.5V , Io = 3.0A — ±10 ±25 mV Load Regulation Reg load Vin = +5V , 0.3 £ Io £ 3.0A — ±10 ±25 mV Vo Ripple/Noise V n Vin = 5V , Io = 3.0A — 66 165 mV T ransient Response t tr Io step between 1.5A and 3.0A — 200 — µSec with C2 = 100µF V os Vo over/undershoot — 200 — mV Efficiency h Vin = +5V , Io = 1.5A V o= 3.3V — 85 — % Vo= 1.8V — 74 — % Vo= 2.1V — 77 — % Vo= 1.2V — 63 — % Switching Frequency ƒ o 4.5V £ Vin £ 5.5V 500 650 800 kHz0.3A £ Io £ 3.0A Absolute Maximum T a 0— + 8 5 ° C Operating T emperature Range Recommended Operating T a Free Air Convection (40-60 LFM) 0 — + 70** °CT emperature Range At V in= 5V , Io=2.5A Thermal Resistance qja Free Air Convection (40-60 LFM) — 25 — °C/W Storage T emperature T s — -40 — +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 , 1 msec, — 500 — G’sHalf Sine, mounted to a fixture Mechanical Vibration Per Mil-STD-883D, Method 2007.2, 20-2000 Hz, Soldered in a PC board —1 5—G ’ s Weight — — — 6.5 — grams *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. Pkg Style 300 PT6400 100µF COM V OUT2,3,4 5,6,7,8 9,10,11 12C1 100µF V IN COM (VO UP) (VO DOWN)
For assistance or to order, call (800) 531-5782 Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http:// www.powertrends.com 25 5V to 3.x Converters5V Bus Products DATA SHEETS CHARACTERISTIC DATA 0.5 1.5 2.5 4.5 4.75 5 5.25 5.5 PT6408, 1.2 VDC (See Note 1) PT6407, 2.1 VDC (See Note 1) PT6405, 3.3 VDC (See Note 1) Efficiency vs Output Current Ripple vs Output Current Thermal Derating (Ta) (See Note 2) Power Dissipation vs Output Current Efficiency - %Ripple-(mV)Iout-(Amps)PD-(Watts) Efficiency - % Efficiency - % Ripple-(mV) Ripple-(mV)Iout-(Amps) Iout-(Amps) PD-(Watts) PD-(Watts) Iout-(Amps) Iout-(Amps) Iout-(Amps) Iout-(Amps) Iout-(Amps) Iout-(Amps) Iout-(Amps) Iout-(Amps) Iout-(Amps) Vin-(Volts) Vin-(Volts)Vin-(Volts) 100 4.5V 5.0V 5.5V Vin 100 0 0.5 1 1.5 2 2.5 3 4.5V 5.0V 5.5V Vin 100 00 . 511 . 522 . 53 4.5V 5.0V 5.5V Vin 0.5 1.5 2.5 4.5 4.75 5 5.25 5.5 85°C 85°C 0.0 0.5 1.0 1.5 2.0 2.5 3.0 5.5V 5.0V 4.5V Vin 0.5 1.5 2.5 0 0.5 1 1.5 2 2.5 3 5.5V 5.0V 4.5V Vin 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.) 0.5 1.5 2.5 00 . 511 . 522 . 53 5.5V 5.0V 4.5V Vin PT6400 Series 100 0 0.5 1 1.5 2 2.5 3 5.5V 5.0V 4.5V Vin 100 00 . 511 . 522 . 53 5.5V 5.0V 4.5V Vin 100 00 . 511 . 522 . 53 5.5V 5.0V 4.5V Vin 0.5 1.5 2.5 4.5 4.75 5 5.25 5.5 85°C Efficiency vs Output CurrentEfficiency vs Output Current Ripple vs Output Current Ripple vs Output Current Thermal Derating (Ta) (See Note 2) Thermal Derating (Ta) (See Note 2) Power Dissipation vs Output Current Power Dissipation vs Output Current
For assistance or to order, call (800) 531-5782 3Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com More Applcation Notes Adjusting the Output Voltage of the PT6400 Series 3AMP 5V Bus Converters The output voltage of the Power T rends PT6400 Series ISRs may be adjusted higher or lower than the factory trimmed pre- set voltage with the addition of a single external resistor. T able 1 accordingly gives the allowable adjustment range for each model in the series as V a (min) and Va (max). 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). Adjust Down: (See note 1) Add a resistor (R2), between pin 12 (Vo adjust) and pins 5-8 (GND). Refer to Figure 1 and T able 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 T rends prod- ucts. 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) loca- tion. Place the resistor as close to the ISR as possible. 3. Never connect capacitors from V o adjust to either GND or Vout. Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 4. An increase in the output voltage may place additional limits on the input voltage range of the part. The revised mini- mum input voltage will be (V out + 1.2) or 4.5V , whichever is higher. Do not exceed 5.5Vdc. Figure 1 The values of R1 [adjust up], and (R2) [adjust down], can also be calculated using the following formulae. 12.45 VoR1 = (Va – Vo) – 49.9 k Ω 12.45 (2Va – Vo) – 49.9 k Ω(R2) = Vo – Va Where: V o = Original output voltage Va = Adjusted output voltage Table 1 PT6400 ADJUSTMENT RANGE Series Pt # PT6408 PT6404 PT6406 PT6407 PT6409 PT6405 Adjust Up 100 µ F 100 µ F Vo COMCOM Vin + + (R2) Adj Down PT6400 9,10,11 125,6,7,8 2,3,4 Vin Vo GND Vo(adj)
For assistance or to order, call (800) 531-5782 Application Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com NotesPT6400 Series Table 2 PT6400 ADJUSTMENT RESISTOR VALUES Series Pt # PT6408 PT6404 PT6406 PT6407 PT6409 PT6405 Va (req’d) 1.1 (74.6)kΩ 1.15 (224.0)kΩ 1.2 1.25 249.0k Ω 1.3 99.5k Ω (18.6)kΩ 1.35 49.7k Ω (49.7)kΩ 1.4 24.8k Ω (112.0)kΩ 1.45 (299.0)kΩ 1.5 (0.0)kΩ 1.55 324.0k Ω (14.8)kΩ 1.6 137.0k Ω (37.3)kΩ 1.65 74.6k Ω (74.6)kΩ 1.7 43.5k Ω (149.0)kΩ 1.75 24.8k Ω (373.0)kΩ 1.8 12.4k Ω (12.4)kΩ 1.85 398.0k Ω (29.8)kΩ 1.9 174.0k Ω (55.9)kΩ 1.95 99.5k Ω (99.5)kΩ 2.0 62.2k Ω (187.0)kΩ 2.05 39.7k Ω (448.0)kΩ 2.15 14.1k Ω 473.0kΩ (14.1)kΩ 2.2 6.1k Ω 212.0kΩ (29.0)kΩ 2.25 124.0k Ω (49.7)kΩ 2.3 80.8k Ω (80.8)kΩ 2.35 54.7k Ω (133.0)kΩ 2.4 37.3k Ω (236.0)kΩ 2.45 24.8k Ω (548.0)kΩ 2.5 15.5k Ω 2.55 8.2k Ω 573.0kΩ 2.6 2.4k Ω 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 2.95 19.3kΩ (42.6)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 32.3kΩ R1 = Black R2 = (Red)
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