PT6900 TI | Alldatasheet

Document overview

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Technical content

Features

  • Single-Device: +5V input
  • Remote Sense
  • Input Voltage Range: 4.75V to 5.5V
  • Adjustable Output Voltage
  • 23-pin SIP Package Pin Function

1 Do not connect

8 Remote Sense GND

9 GND

10 GND

11 GND

12 GND

13 GND

14 GND

15 GND

16 V out

17 V out

18 V out

19 V out

20 V out

21 V out

22 Remote Sense Vout

23 Do not connect

The PT6900 is a new series of plus to minus high- performance, 12 watt voltage converters housed in a 23-pin SIP package. The PT6900 is designed to supply regulated negative voltages for power- ing the latest ECL (-5.2V) and GaAs (-2.0V) ICs used in high-speed fiber optic communications. A 330µF electrolytic capacitor is required on the input and output for proper operation. (For dimensions and PC board layout, see Package Styles 1100 and 1110.) CoutCin PT6900 16-21 9-15 3-7 VADJ -VOUT GNDGND +VIN Remote Sense Remote Sense PT Series Suffix (PT1234X) Case/Pin Configuration Vertical Through-Hole N Horizontal Through-Hole A Horizontal Surface Mount C Specifications Characteristics PT6900 SERIES (Ta= 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current I o Ta = +60°C, 200 LFM, pkg N V o = -2.0V 0.1 * —6 A Ta = +25°C, natural convection V o = -2.0V 0.1 * —6 A Input Voltage Range V in 0.1A ≤ Io ≤ Imax 4.75 — 5.5 V Output Voltage T olerance Δ Vo Vin = +5V , Io = Imax Vo-0.05 — V o+0.05 V0°C ≤ Ta ≤ +60°C Line Regulation Reg line 4.75V ≤ Vin ≤ 5.5V , Io = Imax — ±0.5 ±1.0 % Load Regulation Reg load Vin = +5V , 0.1 ≤ Io ≤ Imax — ±0.5 ±1.0 % Vo Ripple/Noise V n Vin = +5V , Io = Imax Vo = -2.0V — 40 — mV Vo = -5.2V — 100 — mV T ransient Response t tr Io step between 0.5xI max and Imax — 100 — µSec with Cout = 330µF V os Vo over/undershoot V o = -2.0V — 100 — mV Vo = -5.2V — 200 — mV Efficiency η Vin = +5V , Io = 0.5xImax, Vo = -2.0V — 70 — % Switching Frequency ƒ o 4.75V ≤ Vin ≤ 5.5V 500 —— kHz0.1A ≤ Io ≤ Imax Absolute Maximum T a — 0 — +85 °C Operating T emperature Range Recommended Operating T a Forced airflow = 200 LFM 0 — +60 °CT emperature Range Over V in and Io Ranges Storage T emperature T s — -40 — +125 °C Weight — Vertical/Horizontal — 28/33 — grams * ISR-will operate down to no load with reduced specifications. Please note that this product is not short-circuit protected. Revised 11/12/98 Note: Case must be connected to ground pins for proper operation

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 29 5V to 3.x Converters5V Bus Products DATA SHEETS CHARACTERISTIC DATA PT6900 Series Efficiency vs Output Current (@Vin=+5V) Ripple vs Output Current (@Vin=+5V) 0123456 0123456 PT6901, -2.0 VDC 0123456 Power Dissipation vs Output Current PD-(Watts) Ripple-(mV) Iout-(Amps) Iout-(Amps) Iout-(Amps) Efficiency - %

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 Application Notes Adjusting the Output Voltage of the PT6900 Positive to Negative Converter Series The negative output voltage of the Power T rends PT6900 Se- ries 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: An increase in the output voltage is obtained by adding a resistor R2, between pin 2 (Vo adjust) and pin 8 (Remote Sense GND). Adjust Down: Add a resistor (R1), between pin 2 (Vo adjust) and pin 22 (Remote Sense Vo). 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. Use only a single 1% resistor in either the (R1) or R2 loca- tion. Place the resistor as close to the ISR as possible. 2. Never connect capacitors from V o adjust to either GND, Vout, or the Sense pins. Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 3. If the sense pins are not being used, the resistors (R1) and R2 can be connected to Vout and GND respectively. 4. An increase in the output voltage must be accompanied by a corresponding reduction in the maximum output current. The revised maximum output current must be reduced to the equivalent of 12Watts. i.e. Iout (max) = 12 Adc,Va where Va is the adjusted output voltage. Figure 1 The respective values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulae. (R1) = 24.9 (2Va – Vo) – Rs kΩ 2(Vo – Va) R2 = 24.9 Vo – Rs kΩ2(Va – Vo) Where: V o = Original output voltage Va = Adjusted output voltage Rs = The resistance given in T able 1 Table1 PT6900 ADJUSTMENT RANGE AND FORMULA PARAMETERS Series Pt # PT6903 PT6901 PT6902 Vo (nom) -1.5V -2.0V -5.2V Va (min) -1.1V -1.4V -3.7V Va (max) -2.9V -4.4V -8.9V Rs (kΩΩΩΩΩ ) 12.7 10.0 17.4 C in 330 µ F + C out 330 µ F+ (Up) (R1) (Down) COMCOM Vout(-)+Vin PT6900 16 - 21 29 - 15 3 - 7 +Vin -Vo GND Vo(adj) Vo(sense) GND(sense) L O A D

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 NotesPT6900 Series PT6900 ADJUSTMENT RESISTOR VALUES Series Pt # PT6903 PT6901 PT6902 Current 6Adc 6Adc 2.5Adc Vo (nom) –1.5Vdc –2.0Vdc –5.2Vdc Va (req’d) –1.1 (9.1)kΩ –1.2 (24.7)kΩ –1.3 (55.8)kΩ –1.5 (14.9)kΩ –2.0 24.7k Ω –2.1 18.4k Ω 239.0kΩ –2.2 14.0k Ω 115.0kΩ –2.3 10.6k Ω 73.0kΩ –2.4 8.1k Ω 52.3kΩ –2.5 6.0k Ω 39.8kΩ –2.6 4.3k Ω 31.5kΩ –2.7 2.9k Ω 25.6kΩ –2.8 1.7k Ω 21.1kΩ –2.9 0.6k Ω 17.7kΩ –3.0 14.9k Ω –3.1 12.6k Ω –3.2 10.8k Ω –3.3 9.2k Ω –3.4 7.8k Ω –3.5 6.6k Ω –3.6 5.6k Ω Series Pt # PT6903 PT6901 PT6902 Current 6Adc 6Adc 2.5Adc Vo (nom) –1.5Vdc –2.0Vdc –5.2Vdc Va (req’d) –4.5 (50.2)kΩ –4.6 (65.6)kΩ –4.7 (87.2)kΩ –4.8 (120.0)kΩ –4.9 (174.0)kΩ –5.0 (281.0)kΩ –5.1 (605.0)kΩ –5.2 –5.3 630.0k Ω –5.4 306.0k Ω –5.5 198.0k Ω –5.6 144.0k Ω –5.7 112.0k Ω –5.8 90.5k Ω –5.9 75.1k Ω –6.0 63.5k Ω –6.2 47.3k Ω –6.4 36.5k Ω –6.6 28.8k Ω –6.8 23.1k Ω –7.0 18.6k Ω –7.2 15.0k Ω –7.4 12.0k Ω –7.6 9.6k Ω –7.8 7.5k Ω –8.0 5.7k Ω –8.2 4.2k Ω –8.5 2.2k Ω –8.9 0.1k Ω Table 2 R1 = (Red) R2 = Black

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