PT6300 Series 3 Amp Adjustable Positive Step-down Integrated Sw itching Regulators SLTS031B (Revised 9/30/2000) • • • • • • • 90% Efficiency Adjustable Output Voltage Internal Short Circuit Protection Over-Temperature Protection On/Off Control (Ground Off) Small SIP Footprint Wide Input Range The PT6300 Series is a line of High-Performance 3 Amp, 12-Pin SIP (Single In-line Package) Integrated Pin-Out Information Pin 1 Standard Application VOADJ 12 VIN 2,3,4 PT6300 VOUT 9,10,11 1 5,6,7,8 C1 C2 INH + Q1 COM COM C1 = Optional 1µF ceramic C2 = Required 100µF electrolytic Q1 = NFET (1) Specifications Function Inhibit (30V max) 2 3 Vin Vin 4 5 Vin GND 6 7 GND GND 8 9 GND Vout 10 11 Vout Vout 12 Vout Adj (5) Switching Regulators (ISRs) designed to meet the on-board power conversion needs of battery powered or other equipment requiring high efficiency and small size. This high performance ISR family offers a unique combination of features combining 90% typical efficiency with open-collector on/off control and adjustable output voltage. Quiescent current in the shutdown mode is typically less than 100µA. Ordering Information PT6302¨ PT6303¨ PT6304¨ PT6314¨ PT Series Suffix (PT1234X) = +5 Volts = +3.3 Volts = +12 Volts = +1.5Volts Case/Pin Configuration N A C Vertical Through-Hole Horizontal Through-Hole Horizontal Surface Mount Pkg Style 200 PT6300 SERIES Characteristics (Ta=25°C unless noted) Symbols Output Current Short Circuit Current Conditions Min Io Isc Over Vin range Vin = Vo + 5V 0.1 — Typ Max Units — 5.0 3.0 — A Apk Input Voltage Range (Note: inhibit function cannot be used above 30V.) Vin 0.1 ≤ Io ≤ 3.0 A 16 9 9 9.0 — — — — 30/38 (3) 30/38 (3) 26 17 V Output Voltage Tolerance ∆Vo Over Vin Range, Io = 3.0 A Ta = 0°C to +60°C — ±1.0 ±2.0 %Vo Line Regulation Load Regulation Regline Regload Over Vin range 0.1 ≤ Io ≤ 3.0 A — — ±0.25 ±0.25 ±0.5 ±0.5 %Vo %Vo Vo Ripple/Noise Transient Response with Co = 100µF Efficiency Vn ttr Vos η — — — — — — — 600 400 350 ±2 100 5.0 91 89 84 72 750 500 450 — 200 — — — — — 900 600 550 %Vo µSec %Vo Vo = 12V Vo = 5.0V Vo = 3.3V Vo = 1.5V (2) Switching Frequency ƒo Vin = Vin min, Io = 3.0 A 50% load change Vo over/undershoot Vin=16V, Io = 0.5 A, Vin=9V, Io = 0.5 A, Vin=9V, Io = 0.5 A, Vin=9V, Io =0.5A, Over Vin and Io ranges, Shutdown Current Quiescent Current Isc Inl Vin = 15V Io = 0A, Vin =10V — — 100 10 — — µA mA Absolute Maximum Operating Temperature Range Ta Over Vin range -40 — +85 (4) °C Thermal Resistance θja Free Air Convection (40-60LFM) — 30 — °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 — — 10 — G’s — 6.5 — grams Weight Notes: (1) (2) (3) (4) (5) — Vo = 12V Vo = 5.0V Vo = 3.3V Vo = 1.5V Vo = 12V Vo = 3.3V/5V Vo = 1.5V The PT6300 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications. The ISR will operate to no load with reduced specifications. Input voltage cannot exceed 30V when the inhibit function is used. See Thermal Derating charts. Consult the related application note for guidance on adjusting the output voltage. For technical support and more information, see inside back cover or visit www.ti.com/powertrends % kHz Typical Characteristics PT6300 Series 3 Amp Adjustable Positive Step-down Integrated Sw itching Regulators PT6303, 3.3 VDC PT6302, 5.0 VDC (See Note A) Efficiency vs Output Current Efficiency vs Output Current 100 Efficiency vs Output Current 90 70 60 Vin 80 9.0V 12.0V 15.0V 24.0V 30.0V 38.0V 70 60 Efficiency - % 9.0V 12.0V 15.0V 20.0V 26.0V Efficiency - % 90 Vin 80 (See Note A) 100 100 90 Efficiency - % PT6304, 12.0 VDC (See Note A) Vin 80 16.0V 20.0V 70 24.0V 30.0V 38.0V 60 50 50 50 40 0 0.5 1 1.5 2 2.5 3 40 40 0 0.5 1 Iout-(Amps) 2 2.5 0 3 160 26.0V 20.0V 15.0V 12.0V 9.0V 80 60 Ripple-(mV) Vin 100 80 250 60 20 20 1.5 2 2.5 38.0V 30.0V 24.0V 20.0V 150 16.0V 100 0 0 1 Vin 200 50 0 0 0.5 1 1.5 2 2.5 3 0 0.5 1 1.5 2 2.5 3 3 Iout-(Amps) Iout-(Amps) Thermal Derating (Ta) 3 300 38.0V 30.0V 24.0V 15.0V 12.0V 9.0V 100 40 2.5 Vin 120 40 2 350 140 V 120 1.5 Ripple vs Output Current Ripple-(mV) 180 140 0.5 1 Iout-(Amps) Ripple vs Output Current 160 0 0.5 Iout-(Amps) Ripple vs Output Current Ripple-(mV) 1.5 Thermal Derating (Ta) (See Note B) 60°C 3 Iout-(Amps) Thermal Derating (Ta) (See Note B) 3 (See Note B) 3 50°C 70°C 40°C 60°C 2.5 2.5 2.5 50°C 70°C 85°C 1.5 1 2 Iout-(Amps) 2 2 Iout-(Amps) Iout-(Amps) 60°C 85°C 1.5 1 70°C 1.5 1 0.5 0.5 0.5 0 0 0 9 9 11 13 15 17 19 21 23 25 13 17 21 Vin-(Volts) 29 33 16 37 19 22 25 Vin-(Volts) Power Dissipation vs Output Current 3 1 37 4 3.5 38.0V 30.0V 24.0V 15.0V 12.0V 9.0V 2 1.5 PD-(Watts) Vin 2.5 PD-(Watts) 26.0V 20.0V 15.0V 12.0V 9.0V 1.5 34 4.5 3 Vin 2 31 Power Dissipation vs Output Current 3.5 2.5 28 Vin-(Volts) Power Dissipation vs Output Current 3.5 PD-(Watts) 25 27 Vin 3 38.0V 30.0V 24.0V 20.0V 16.0V 2.5 2 1.5 1 1 0.5 0.5 0.5 0 0 0 0.5 1 1.5 2 2.5 3 0 0.5 1 1.5 2 2.5 3 0 0 Iout-(Amps) Iout-(Amps) 0.5 1 1.5 2 2.5 3 Iout-(Amps) Note A: Characteristic data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the ISR Note B: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application note.) For technical support and more information, see inside back cover or visit www.ti.com/powertrends Application Notes PT6100/6210/6300 Series Adjusting the Output Voltage of Power Trends’ Wide Input Range Bus ISRs The output voltage of the Power Trends’ Wide Input Range Series ISRs may be adjusted higher or lower than the factory trimmed pre-set voltage with the addition of a single external resistor. Table 1 accordingly gives the allowable adjustment range for each model for either series as Va (min) and Va (max). Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 12 (Vo adjust) and pins 5-8 (GND). Adjust Down: Add a resistor (R1), between pin 12 (Vo adjust) and pins 9-11(Vout). 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 or Vout. Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 3. Adjustments to the output voltage may place additional limits on the maximum and minimum input voltage for the part. The revised maximum and minimum input voltage limits must comply with the following requirements. The limits are model dependant. PT6216/PT6314: Vin (max) = (10 x Va)V or 17V, whichever is less. Vin (min) = 9.0V Figure 1 All other models: 2,3,4 Vin PT6100/6200/6300 Vin Vo GND 9,10,11 Vo Vin (min) = (Va + 4)V or 9V, whichever is greater. Vo(adj) 5,6,7,8 12 (R1) Adj Down C1 1µF Ceramic (Optional) Vin (max) = (8 x Va)V or as specified. C2 100µF (Req'd) + R2 Adjust Up COM COM The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulas. Refer to Figure 1 and Table 2 for both the placement and value of the required resistor; either (R1) or R2 as appropriate. (R1) = Ro (Va – 1.25) Vo – Va kΩ R2 = 1.25 Ro Va – Vo kΩ Where: Vo = Original output voltage Va = Adjusted output voltage Ro = The resistance value fromTable 1 Table 1 ISR ADJUSTMENT RANGE AND FORMULA PARAMETERS 1Adc Rated 2Adc Rated 3Adc Rated PT6216 PT6314 PT6102 PT6213 PT6303 PT6101 PT6212 PT6302 PT6103 PT6214 PT6304 12.0 Vo (nom) Va (min) 1.5 3.3 5.0 5.0 1.3 1.8 1.88 2.18 2.43 Va (max) Ω) Ro (kΩ 1.9 6.07 11.25 8.5 22.12 8.25 66.5 150.0 90.9 243.0 For technical support and more information, see inside back cover or visit www.ti.com/powertrends Application Notes continued PT6100/6210/6300 Series Table 2 ISR ADJUSTMENT RESISTOR VALUES 1Adc Rated 2Adc Rated 3Adc Rated Vo (nom) Va (req.d) PT6216 PT6314 1.5 PT6102 PT6213 PT6303 3.3 ISR ADJUSTMENT RESISTOR VALUES (Cont) PT6101 5.0 PT6212 PT6302 5.0 PT6103 PT6214 PT6304 12.0 1Adc Rated 2Adc Rated 3Adc Rated Vo (nom) Va (req.d) PT6101 5.0 PT6212 PT6302 5.0 PT6103 PT6214 PT6304 12.0 1.3 (2.1kΩ) 6.2 156.0kΩ 94.7kΩ (207.0)kΩ 1.4 (12.4kΩ) 6.4 134.0kΩ 81.2kΩ (223.0)kΩ 6.6 117.0kΩ 71.0kΩ (241.0)kΩ 1.5 1.6 103.0kΩ 6.8 104.0kΩ 63.1kΩ (259.0)kΩ 1.7 51.6kΩ 7.0 93.8kΩ 56.8kΩ (279.0)kΩ 1.8 34.4kΩ (24.4)kΩ 7.2 85.2kΩ 51.6kΩ (301.0)kΩ 1.9 25.8kΩ (30.9)kΩ (31.5)kΩ 7.4 78.1kΩ 47.3kΩ (325.0)kΩ 2.0 (38.4)kΩ (37.5)kΩ 7.6 72.1kΩ 43.7kΩ (351.0)kΩ 2.1 (47.1)kΩ (44.0)kΩ 7.8 67.0kΩ 40.6kΩ (379.0)kΩ 2.2 (57.4)kΩ (50.9)kΩ (30.8)kΩ 8.0 62.5kΩ 37.9kΩ (410.0)kΩ 2.3 (69.8)kΩ (58.3)kΩ (35.4)kΩ 8.2 58.6kΩ 35.5kΩ (444.0)kΩ 2.4 (85.0)kΩ (66.3)kΩ (40.2)kΩ 8.4 55.1kΩ 33.4kΩ (483.0)kΩ 2.5 (104.0)kΩ (75.0)kΩ (45.5)kΩ (32.0)kΩ 8.6 52.1kΩ (525.0)kΩ 2.6 (128.0)kΩ (84.4)kΩ (51.1)kΩ (34.9)kΩ 8.8 49.3kΩ (573.0)kΩ 2.7 (161.0)kΩ (94.6)kΩ (57.3)kΩ (37.9)kΩ 9.0 46.9kΩ (628.0)kΩ 2.8 (206.0)kΩ (106.0)kΩ (64.0)kΩ (40.9)kΩ 9.5 41.7kΩ (802.0)kΩ 2.9 (274.0kΩ (118.0)kΩ (71.4)kΩ (44.1)kΩ 10.0 37.5kΩ (1060.0)kΩ 3.0 (388.0)kΩ (131.0)kΩ (79.5)kΩ (47.3)kΩ 10.5 34.1kΩ (1500.0)kΩ 3.1 (615.0)kΩ (146.0)kΩ (88.5)kΩ (50.5)kΩ 11.0 31.3kΩ 3.2 (1300.0)kΩ (163.0)kΩ (98.5)kΩ (53.8)kΩ 11.5 3.3 (181.0)kΩ (110.0)kΩ (57.3)kΩ 3.4 831.0kΩ (202.0)kΩ (122.0)kΩ (60.8)kΩ 12.5 608.0kΩ 3.5 416.0kΩ (225.0)kΩ (136.0)kΩ (64.3)kΩ 13.0 304.0kΩ 3.6 227.0kΩ (252.0)kΩ (153.0)kΩ (68.0)kΩ 13.5 203.0kΩ 3.7 208.0kΩ (283.0)kΩ (171.0)kΩ (71.7)kΩ 14.0 152.0kΩ 3.8 166.0kΩ (319.0)kΩ (193.0)kΩ (75.6)kΩ 14.5 122.0kΩ 3.9 139.0kΩ (361.0)kΩ (219.0)kΩ (79.5)kΩ 15.0 101.0kΩ 4.0 119.0kΩ (413.0)kΩ (250.0)kΩ (83.5)kΩ 15.5 86.8kΩ 4.1 104.0kΩ (475.0)kΩ (288.0)kΩ (87.7)kΩ 16.0 75.9kΩ 4.2 92.4kΩ (533.0)kΩ (335.0)kΩ (91.9)kΩ 16.5 67.5kΩ 4.3 83.1kΩ (654.0)kΩ (396.0)kΩ (96.3)kΩ 17.0 60.8kΩ 4.4 75.6kΩ (788.0)kΩ (477.0)kΩ (101.0)kΩ 17.5 55.2kΩ 4.5 69.3kΩ (975.0)kΩ (591.0)kΩ (105.0)kΩ 18.0 50.6kΩ 4.6 63.9kΩ (1260.0)kΩ (761.0)kΩ (110.0)kΩ 18.5 46.7kΩ 4.7 59.4kΩ (1730.0)kΩ (1050.0)kΩ (115.0)kΩ 19.0 43.4kΩ 4.8 55.4kΩ (1610.0)kΩ (120.0)kΩ 19.5 40.5kΩ 4.9 52.0kΩ (125.0)kΩ 20.0 38.0kΩ 5.0 48.9kΩ (130.0)kΩ 20.5 35.7kΩ 5.1 46.2kΩ 1880.0kΩ 1140.0kΩ (136.0)kΩ 21.5 33.8kΩ 5.2 43.8kΩ 937.0kΩ 568.0kΩ (141.0)kΩ 21.5 32.0kΩ 5.3 41.6kΩ 625.0kΩ 379.0kΩ (147.0)kΩ 22.0 30.4kΩ 5.4 39.6kΩ 469.0kΩ 284.0kΩ (153.0)kΩ 5.5 37.8kΩ 375.0kΩ 227.0kΩ (159.0)kΩ 5.6 36.1kΩ 313.0kΩ 189.0kΩ (165.0)kΩ 5.7 34.6kΩ 268.0kΩ 162.0kΩ (172.0)kΩ 5.8 33.3kΩ 234.0kΩ 142.0kΩ (178.0)kΩ 5.9 32.0kΩ 208.0kΩ 126.0kΩ (185.0)kΩ 6.0 30.8kΩ 188.0kΩ 114.0kΩ (192.0)kΩ R1 = (Blue) 12.0 R2 = Black For technical support and more information, see inside back cover or visit www.ti.com/powertrends Application Notes PT6100/6210/6300 Series Using the Inhibit Function on Power Trends’ Wide Input Range Bus ISRs For applications requiring output voltage On/Off control, the 12pin ISR products incorporate an inhibit function. The function has uses in areas such as battery conservation, power-up sequencing, or any other application where the regulated output from the module is required to be switched off. The On/Off function is provided by the Pin 1 (Inhibit) control. Figure 1 The ISR functions normally with Pin 1 open-circuit, providing a regulated output whenever a valid source voltage is applied to Vin, (pins 2, 3, & 4). When a lowlevel2 ground signal is applied to Pin 1, the regulator output will be disabled. Inh Figure 1 shows an application schematic, which details the typical use of the Inhibit function. Note the discrete transistor (Q1). The Inhibit control has its own internal pull-up with a maximum open-circuit voltage of 8.3VDC. Only devices with a true open-collector or open-drain output can be used to control this pin. A discrete bipolar transistor or MOSFET is recommended. Equation 1 may be used to determine the approximate current drawn by Q1 when the inhibit is active. Equation 1 = Vin ÷ 155kΩ PT6100/6210/6300 Vin Vo Inh* 1 C1, 1µF (Optional) GND 9,10,11 V out Vo(adj) 5,6,7,8 12 C2 100µF Q1 BSS138 + COM COM Turn-On Time: The output of the ISR is enabled automatically when external power is applied to the input. The Inhibit control pin is pulled high by its internal pull-up resistor. The ISR produces a fully regulated output voltage within 1-msec of either the release of the Inhibit control pin, or the application of power. The actual turn-on time will vary with the input voltage, output load, and the total amount of capacitance connected to the output Using the circuit of Figure 1, Figure 2 shows the typical rise in output voltage for the PT6101 following the turn-off of Q1 at time t =0. The waveform was measured with a 9Vdc input voltage, and 5-Ohm resistive load. ± 20% Notes: 1. The Inhibit control logic is similar for all Power Trends’ modules, but the flexibility and threshold tolerances will be different. For specific information on the inhibit function of other ISR models, consult the applicable application note. 2. Use only a true open-collector device (preferably a discrete transistor) for the Inhibit input. Do Not use a pull-up resistor, or drive the input directly from the output of a TTL or other logic gate. To disable the output voltage, the control pin should be pulled low to less than +1.5VDC. 3. When the Inhibit control pin is active, i.e. pulled low, the maximum allowed input voltage is limited to +30Vdc. Figure 2 6 5 4 Vo (Vdc) Istby 2,3,4 V in 3 2 1 0 -0.2 4. Do not control the Inhibit input with an external DC voltage. This will lead to erratic operation of the ISR and may over-stress the regulator. 5. Avoid capacitance greater than 500pF at the Inhibit control pin. Excessive capacitance at this pin will cause the ISR to produce a pulse on the output voltage bus at turn-on. 6. Keep the On/Off transition to less than 10µs. This prevents erratic operation of the ISR, which can cause a momentary high output voltage. For technical support and more information, see inside back cover or visit www.ti.com/powertrends 0 0.2 0.4 t (milli-secs) 0.6 0.8 1 PACKAGE OPTION ADDENDUM www.ti.com 13-Oct-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty PT6302A ACTIVE SIP MOD ULE EBA 12 12 TBD Call TI Level-1-215C-UNLIM PT6302B ACTIVE SIP MOD ULE EBK 12 12 TBD Call TI Level-1-215C-UNLIM PT6302BT ACTIVE SIP MOD ULE EBK 12 200 TBD Call TI Level-1-215C-UNLIM PT6302C ACTIVE SIP MOD ULE EBC 12 12 TBD Call TI Level-1-215C-UNLIM PT6302CT ACTIVE SIP MOD ULE EBC 12 200 TBD Call TI Level-1-215C-UNLIM PT6302G ACTIVE SIP MOD ULE EBG 12 12 TBD Call TI Level-1-215C-UNLIM PT6302H OBSOLETE SIP MOD ULE EBH 12 TBD Call TI Call TI PT6302J OBSOLETE SIP MOD ULE EBJ 12 TBD Call TI Call TI Lead/Ball Finish MSL Peak Temp (3) PT6302N ACTIVE SIP MOD ULE EBD 12 12 TBD Call TI Level-1-215C-UNLIM PT6302R ACTIVE SIP MOD ULE EBE 12 12 TBD Call TI Level-1-215C-UNLIM PT6302S ACTIVE SIP MOD ULE EBF 12 12 TBD Call TI Level-1-215C-UNLIM PT6303A ACTIVE SIP MOD ULE EBA 12 12 TBD Call TI Level-1-215C-UNLIM PT6303B ACTIVE SIP MOD ULE EBK 12 12 TBD Call TI Level-1-215C-UNLIM PT6303C ACTIVE SIP MOD ULE EBC 12 12 TBD Call TI Level-1-215C-UNLIM PT6303CT ACTIVE SIP MOD ULE EBC 12 200 TBD Call TI Level-1-215C-UNLIM PT6303G ACTIVE SIP MOD ULE EBG 12 12 TBD Call TI Level-1-215C-UNLIM PT6303N ACTIVE SIP MOD ULE EBD 12 12 TBD Call TI Level-1-215C-UNLIM PT6303R ACTIVE SIP MOD ULE EBE 12 12 TBD Call TI Level-1-215C-UNLIM OBSOLETE SIP MOD ULE EBF 12 TBD Call TI Call TI PT6303S PT6304A ACTIVE SIP MOD ULE EBA 12 12 TBD Call TI Level-1-215C-UNLIM PT6304B ACTIVE SIP MOD ULE EBK 12 12 TBD Call TI Level-1-215C-UNLIM PT6304C ACTIVE SIP MOD ULE EBC 12 12 TBD Call TI Level-1-215C-UNLIM PT6304G ACTIVE SIP MOD ULE EBG 12 12 TBD Call TI Level-1-215C-UNLIM PT6304H OBSOLETE SIP MOD ULE EBH 12 TBD Call TI Call TI PT6304J OBSOLETE SIP MOD ULE EBJ 12 TBD Call TI Call TI Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 13-Oct-2005 Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty PT6304N ACTIVE SIP MOD ULE EBD 12 12 TBD Call TI Level-1-215C-UNLIM PT6304R ACTIVE SIP MOD ULE EBE 12 12 TBD Call TI Level-1-215C-UNLIM PT6314A ACTIVE SIP MOD ULE EBA 12 12 TBD Call TI Level-1-215C-UNLIM PT6314N NRND SIP MOD ULE EBD 12 12 TBD Call TI Level-1-215C-UNLIM Lead/Ball Finish MSL Peak Temp (3) (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) 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. 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. 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