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For technical support and more information, see inside back cover or visit www.ti.com/powertrends PT6900 Series Standard Application
Ordering Information
+5V Input +3.3V Input V out Cin = Required 330µF electrolytic Cout = Required 330µF electrolytic
- +5V/+3.3V Input Voltage
- Negative Output
- Remote Sense
- Adjustable Output Voltage
- 23-pin SIP Package The PT6900 is a series of high- performance ISRs, that provide plus to minus voltage conversion, up to 12 watt in a 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 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 elec- trolytic capacitor is required on the input and output for proper operation. Please note that this product is not short-circuit protected. (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 SLTS041A (Revised 6/30/2000) Specifications Characteristics PT6900 SERIES (Ta= 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current I o Ta = +25°C, natural convection Input Voltage Range 0.1A ≤ Io ≤ Imax PT6901 PT6902/PT6903 4.5 — 5.5 PT6904/PT6905 3.1 — 3.6 V Output Voltage T olerance ∆Vo Nominal Vin, Io = Imax Vo – 0.05 — V o + 0.05 V0°C ≤ Ta ≤ +60°C Output Adjust Range V o Pin 14 to Vo or GND V o = –2.0V –1.4 — –4.4 Line Regulation Reg line Over Vin range, Io =Imax — ±0.5 ±1.0 % Load Regulation Reg load Vin =Vnom, 0.1 ≤ Io ≤ Imax — ±0.5 ±1.0 % Vo Ripple/Noise V n Vin = Vnom, Io =Imax Vo = –1.5V / –2.0V — 40 — mVVo = –5.2V — 50 — Transient Response t tr Io step between 0.5xI max and Imax — 200 — µSec with Cout = 330µF V os Vo over/undershoot — 200 — mV Efficiency η Vin =+5V, Io =0.5xImax Vo = –1.5V — 65 — Vo = –5.2V — 77 — Vin = +3.3V, Io =0.5xImax Vo = –2.0V — 67 — %Vo = –5.2V — 75 — Switching Frequency ƒ o Over Vin and Io ranges 500 — 600 kHz Absolute Maximum T a Over Vin Range 0 — +85 (2) °C Operating T emperature Range Storage T emperature T s -40 — +125 °C Weight — Vertical/Horizontal — 28/33 — grams Notes: (1) ISR-will operate down to no load with reduced specifications. (2) See SOA curves or contact the factory for the approrpiate derating. 12 Watt 5V/3.3V Input Plus to Minus Voltage Converter
For technical support and more information, see inside back cover or visit www.ti.com/powertrends T ypical Characteristics 3.3V Input Voltage (See Note A) Efficiency vs Output Current Efficiency vs Output Current 5.0V Input Voltage (See Note A) Ripple vs Output Current Ripple vs Output Current Power Dissipation vs Output Current Power Dissipation vs Output Current Safe Operating Area, PT6901 (V in =5.0V) (See Note B) Safe Operating Area, PT6902 (V in =5.0V) (See Note B) Note A: All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the DC-DC Converter. Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum operating temperatures PT6900 Series 12 Watt 5V/3.3V Input Plus to Minus Voltage Converter 0123456 Iout (A) Efficiency - % PT6902 PT6901 PT6903 0123456 Iout (A) Pd - Watts PT6902 PT6901 PT6903 0123456 Iout (A) Ripple - mV PT6902 PT6901 PT6903 012345 Iout (A) Efficiency - % PT6905 PT6904 012345 Iout (A) Pd - Watts PT6905 PT6904 012345 Iout (A) Ripple - mV PT6905 PT6904 0123456 Iout (A) Ambient Temperature ( C) 200LFM 120LFM 60LFM Nat conv Airflow 00 . 511 . 522 . 533 . 54 Iout (A) Ambient Temperature ( C) 200LFM 120LFM 60LFM Nat conv Airflow
For technical support and more information, see inside back cover or visit www.ti.com/powertrends PT6900/6910 Series Adjusting the Output Voltage of the PT6900/PT6910 Positive to Negative Converter Series The negative output voltage of the Power Trends PT6900 Series ISRs may be adjusted higher or lower than the factory trimmed pre-set voltage with the addi- tion of a single external resistor. T able 1 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 (V o ad- just) and pin 8 (Remote Sense GND). Adjust Down: Add a resistor (R1), between pin 2 (V o adjust) and pin 22 (Remote Sense V o). 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. Only a single 1% resistor is required in either the (R1) or R2 location. Do not use (R1) and R2 simultaneously. Place the resistor as close to the ISR as possible. 2. Never connect capacitors from Vo 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 [ad- just up], can also be calculated using the following formulas. (R1) = 24.9 (Va – Vr) – Rs kΩ (Vo – Va) R2 = 24.9 Vr – Rs kΩ (Va – Vo) Where: Vo = Original output voltage Va = Adjusted output voltage Vr = Reference voltage in T able 1 Rs = The resistance given in T able 1 Table1 PT6900/PT6910 ADJUSTMENT RANGE AND FORMULA PARAMETERS Series Pt # 5.0V Bus PT6903/13 PT6901/11 PT6902/12 3.3V Bus PT6904/14 PT6905/15 Vo (nom) -1.5V -2.0V -5.2V Va (min) -1.2V -1.4V -2.7V Va (max) -3.4V -4.5V -6.5V Rs (kΩΩΩΩΩ) 12.7 10.0 17.4 Cin C out+ (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 technical support and more information, see inside back cover or visit www.ti.com/powertrends Application Notes continued PT6900/PT6910 ADJUSTMENT RESISTOR VALUES Series Pt # 5.0V Bus PT6903/13 PT6901/11 PT6902/12 3.3V Bus PT6904/14 PT6905/15 Vo (nom) –1.5Vdc –2.0Vdc –5.2Vdc Va (req’d) –1.2 (3.9)kΩ –1.3 (24.7)kΩ –1.5 (14.9)kΩ –2.0 37.1k Ω –2.1 28.8k Ω 239.0kΩ –2.2 22.9k Ω 115.0kΩ –2.3 18.4k Ω 73.0kΩ –2.4 15.0k Ω 52.3kΩ –2.5 12.2k Ω 39.8kΩ –2.6 9.9k Ω 31.5kΩ Series Pt # 5.0V Bus PT6903/13 PT6901/11 PT6902/12 3.3V Bus PT6904/14 PT6905/15 Vo (nom) –1.5Vdc –2.0Vdc –5.2Vdc Va (req’d) –4.6 (135.0)kΩ –4.7 (171.0)kΩ –4.8 (224.0)kΩ –4.9 (313.0)kΩ –5.0 (491.0)kΩ –5.1 (1020.0)kΩ –5.2 –5.3 212.0k Ω –5.4 97.1k Ω –5.5 59.0k Ω –5.6 39.9k Ω –5.7 28.4k Ω –5.8 20.8k Ω –5.9 15.3k Ω –6.0 11.2k Ω –6.1 8.1k Ω –6.2 5.5k Ω –6.3 3.4k Ω –6.4 1.7k Ω –6.5 0.2k Ω Table 2 R1 = (Blue) R2 = Black PT6900/6910 Series
www.ti.com 12-Jan-2013 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3) Samples (Requires Login) PT6901N LIFEBUY SIP MODULE EJH 23 10 TBD Call TI Level-1-215C-UNLIM PT6902C LIFEBUY SIP MODULE EJK 23 8 TBD Call TI Level-1-215C-UNLIM PT6902N LIFEBUY SIP MODULE EJH 23 10 TBD Call TI Level-1-215C-UNLIM PT6903A OBSOLETE SIP MODULE EJJ 23 TBD Call TI Call TI PT6903C OBSOLETE SIP MODULE EJK 23 TBD Call TI Call TI PT6903N OBSOLETE SIP MODULE EJH 23 TBD Call TI Call TI PT6904A OBSOLETE SIP MODULE EJJ 23 TBD Call TI Call TI PT6904C OBSOLETE SIP MODULE EJK 23 TBD Call TI Call TI PT6904N OBSOLETE SIP MODULE EJH 23 TBD Call TI Call TI PT6905N LIFEBUY SIP MODULE EJH 23 10 TBD Call TI Level-1-215C-UNLIM (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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