PT6620 Series 6 Amp 12V Input Integrated Switching Regulator SLTS036B (Revised 9/20/2000) • • • • • • • Single Device: 6A Output Input Voltage Range: 9V to 16V Adjustable Output Voltage 83% Efficiency Remote Sense Capability Standby Function Over-Temperature Protection The PT6620 series is a line of 12V bus Integrated Switching Regulators (ISRs). These regulators are de- Pin-Out Information Pin Standard Application REMOTE SENSE 1 V IN 4,5,6 PT6620 VOUT 11,12,13 3 C1 7,8,9,10 + STBY C2 + LOAD Q1 COM COM C1 = Required 330µF electrolytic (1) C2 = Required 330µF electrolytic (1) Q1 = NFET-or Open Collector Gate Specifications Function 1 Remote Sense 2 Do Not Connect 3 STBY*- Standby 4 Vin 5 Vin 6 Vin 7 GND 8 GND 9 GND 10 GND 11 Vout 12 Vout 13 Vout 14 Vout Adjust signed for stand-alone operation in applications requiring as much as 6A of output current. The PT6620 series is packaged in Power Trends’ standard 14-Pin SIP (Single In-line Package), which is available in either a vertical or horizontal configuration. Two electrolytic capacitors are required for proper operation. Please note that this product does not include short circuit protection. Ordering Information PT Series Suffix (PT1234X) PT6621¨ PT6622¨ PT6623¨ PT6624¨ PT6625¨ PT6626¨ PT6627¨ = +3.3 Volts = +1.5 Volts = +2.5 Volts = +3.6 Volts = +5.0 Volts = +9.0 Volts = +1.8 Volts Case/Pin Heat Heat Spreader Configuration Spreader with Side Tabs Vertical Through-Hole P R Horizontal Through-Hole D G Horizontal Surface Mount E B Pkg Style 400/410 Note: Back surface of product is conducting metal PT6620 SERIES Characteristics (Ta = 25°C unless noted) Symbols Output Current Io Ta = 60°C, 200 LFM, pkg P Ta = 25°C, natural convection Input Voltage Range Vin 0.1A ≤ Io ≤ 6.0A Output Voltage Tolerance ∆Vo Vin = +12V, Io = 6.0A Ta = 0 to 60°C Output Voltage Adjust Range Voadj Pin 14 to Vo or ground Conditions Min Typ Max Units — — 6.0 6.0 A +9 Vo+3 — — +16 +16 V Vo-0.1 — Vo+0.1 V 2.3 1.4 1.9 2.5 2.9 5.2 — — — — — — 4.5 2.6 3.7 4.8 6.5 10.0 0.1 0.1 Vo ≤ +5V +6V≤Vo≤+9V Vo Vo Vo Vo Vo Vo = +3.3V = +1.5V = +2.5V = +3.6V = +5.0V = +9.0V (2) (2) V Line Regulation Regline Vin(min) ≤Vin ≤Vin (max), Io = 6.0A — ±0.5 ±1.0 Load Regulation Regload Vin = +12V, 0.1≤ I o≤6.0A — ±0.5 ±1.0 %Vo Vo Ripple/Noise Vn Vin = +12V, Io = 6.0A — — 50 1.0 — — mVpp %Vo Transient Response with C2 = 330µF ttr Vos Io step between 3.0A and 6.0A Vo over/undershoot — — 100 150 — — µSec mV Vo= +3.3/3.6V V o = +1.5V V o = +2.5V V o = +5.0V V o = +9.0V — — — — — 84 68 76 86 93 — — — — — % Vo= +3.3/3.6V V o = +1.5V V o = +2.5V V o = +5.0V V o = +9.0V — — — — — 83 66 75 85 92 — — — — — % PT6622 Except PT6622 500 550 550 650 600 750 kHz kHz Efficiency η Vin = +12V, Io = 3.0A Vin = +12V, Io =6.0A Switching Frequency ƒo Vin (min) ≤Vin≤Vin(max) 0.1A ≤ Io ≤ 6.0 Vo < +6V Vo > +6V %Vo Continued For technical support and more information, see inside back cover or visit www.ti.com/powertrends PT6620 Series 6 Amp 12V Input Integrated Switching Regulator Specifications (continued) PT6620 SERIES Characteristics (Ta = 25°C unless noted) Symbols Conditions Min Typ Max Absolute Maximum Operating Temperature Range Ta Over V in range -40 — +85 Units Storage Temperature Ts — -40 — +125 °C Mechanical Shock — Per Mil-STD-883D, Method 2002.3 — 500 — G’s Mechanical Vibration — Per Mil-STD-883D, Method 2007.2, 20-2000 Hz, soldered in a PC board — 7.5 — G’s Weight — — — 14 — grams (3) °C Notes: (1) The PT6620 Series requires a 330µF(output) and 100µF(input) electrolytic capacitors for proper operation in all applications. (2) ISR will operate down to no load with reduced specifications (3) See safe Operating Area curves or contact the factory for the appropriate derating. T Y P I C A L PT6620 Series @Vin=+12V C H A R A C T E R I S T I C S Safe Operating Area, Vin=+12V (See Note A) PT6621/6622/6623P, Vo ≤3.3V Efficiency vs Output Current 100 90.0 90 80.0 80 PT6621 PT6622 PT6623 70 PT6625 PT6626 60 50 Ambient Temperature (°C) Efficiency (%) (See Note B) 70.0 Airflow 200LFM 120LFM 60LFM Nat conv 60.0 50.0 40.0 30.0 40 0 1 2 3 4 5 20.0 6 0.0 1.0 2.0 Output Current (A) Output Ripple vs Output Current 4.0 5.0 6.0 PT6625P, Vo =5.0V 30 90.0 25 80.0 20 PT6621 PT6622 PT6623 15 PT6625 PT6626 10 5 Ambient Temperature (°C) Ripple (mVpp) 3.0 Iout (A) 70.0 Airflow Nat conv 60LFM 120LFM 200LFM 60.0 50.0 40.0 30.0 0 20.0 0 1 2 3 4 5 6 0.0 1.0 2.0 Output Current (A) Power Dissipation vs Output Current 4.0 5.0 6.0 PT6626P, Vo =9.0V 5 90.0 PT6621 3 PT6622 PT6623 PT6625 2 PT6626 1 Ambient Temperature (°C) 80.0 4 Pd (Watts) 3.0 Iout (A) 70.0 Airflow Nat conv 60LFM 120LFM 200LFM 60.0 50.0 40.0 30.0 0 20.0 0 1 2 3 4 Output Current (A) 5 6 0.0 1.0 2.0 3.0 4.0 5.0 6.0 Iout (A) Note A: All characteristic data in the above graphs has been develped from actual products tested at 25°C. This data is considered typical for the ISR. Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperatures. For technical support and more information, see inside back cover or visit www.ti.com/powertrends Application Notes PT6620 Series Adjusting the Output Voltage of the PT6620 7Amp12V Bus Converter Series Figure 1 The output voltage of the Power Trends PT6620 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 in the series as Va (min) and Va (max). 1 Vsense 4,5,6 Vin PT6620 Vin GND STBY Vo Vo Vo(adj) 7,8,9,10 3 11,12,13 14 (R1) Adj Down + + C in C out Adjust Up: An increase in the output voltage is obtained by adding a resistor R2, between pin 14 (Vo adjust) and pins 7-10 (GND). L O A D R2 Adjust Up COM COM Adjust Down: Add a resistor (R1), between pin 14 (Vo adjust) and pins 11-13 (Vout). 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. 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, Vout, or the Remote Sense pin. Any capacitance added to the Vo adjust pin will affect the stability of the ISR. 3. If the Remote Sense feature is being used, connecting the resistor (R1) between pin 14 (Vo adjust) and pin 1 (Remote Sense) can benefit load regulation. 4. The minimum input voltage required by the part is Vout + 3, or 9V, whichever is higher. The values of (R1) [adjust down], and R2 [adjust up], can also be calculated using the following formulae. (R1) = Ro (Va – 1.25) – Rs (Vo – Va) kΩ R2 = 1.25 Ro Va - Vo kΩ Where: Vo Va Ro Rs – Rs = Original output voltage = Adjusted output voltage = The resistance value in Table 1 = The series resistance from Table 1 Table 1 PT6620 ADJUSTMENT AND FORMULA PARAMETERS Series Pt # PT6622 PT6623 PT6621 PT6624 PT6625 PT6626 Vo (nom) Va (min) 1.5V 2.5V 3.3V 3.6V 5.0V 9.0V 1.4V 1.9V 2.3V 2.5V 2.9V 5.2V Va (max) Ω) Ro (kΩ 2.7V 3.7V 4.5V 4.8V 6.5V 10.0V Ω) Rs (kΩ 2.49 4.99 10.0 4.99 12.1 12.1 16.2 12.1 12.1 12.1 12.1 12.1 For technical support and more information, see inside back cover or visit www.ti.com/powertrends Application Notes continued PT6620 Series Table 2 PT6620 ADJUSTMENT RESISTOR VALUES Series Pt # Current Vo (nom) Va (req’d) 1.4 PT6622 7.5Adc 1.5Vdc PT6623 7.5Adc 2.5Vdc PT6621 7.5Adc 3.3Vdc PT6624 7.5Adc 3.6Vdc PT6625 6.0Adc 5.0Vdc (5.0)kΩ 1.5 Series Pt # Current Vo (nom) Va (req’d) PT6625 6Adc 5.0Vdc PT6626 3.3Adc 9.0Vdc 5.2 89.1k (0.5)kΩ 5.3 55.4k (1.1)kΩ 1.6 59.9k 5.4 38.5k (1.9)kΩ 1.7 28.7k 5.5 28.4k (2.6)kΩ 1.8 18.3k 5.6 21.7k (3.4)kΩ 1.9 13.1k (5.8)kΩ 5.7 16.8k (4.2)kΩ 2.0 10.0k (10.0)kΩ 5.8 13.2k (5.1)kΩ 2.1 7.9k (16.3)kΩ 5.9 10.4k (6.1)kΩ 2.2 6.4k (26.7)kΩ 6.0 8.2k (7.1)kΩ 2.3 5.3k (47.5)kΩ (0.6)kΩ 6.1 6.3k (8.1)kΩ 2.4 4.4k (110.0)kΩ (3.4)kΩ 2.5 3.8k 2.6 3.2k 6.2 4.8k (9.3)kΩ (6.8)kΩ (1.7)kΩ 6.3 3.5k (10.5)kΩ 120.0k (11.2)kΩ (4.2)kΩ 6.4 2.4k (11.9)kΩ 2.7 57.5k (17.1)kΩ (7.4)kΩ 6.5 1.4k (13.3)kΩ 2.8 36.7k (25.4)kΩ (11.3)Ω 2.9 26.3k (37.8)kΩ (16.4)kΩ 3.0 20.0k (58.5)kΩ 3.1 15.8k 3.2 12.9k 3.3 10.6k 3.4 8.9k 139.0k 3.5 7.5k 63.5k 3.6 6.4k 38.3k 3.7 5.4k 25.7k 3.8 6.6 (14.9)kΩ (0.6)kΩ 6.7 (16.6)kΩ (23.2)kΩ (2.1)kΩ 6.8 (18.4)kΩ (99.8)kΩ (32.7)kΩ (3.7)Ω 6.9 (20.5)kΩ (224.0)kΩ (46.9)kΩ (5.5)kΩ 7.0 (22.7)kΩ (70.6)kΩ (7.4)kΩ 7.1 (25.2)kΩ (118.0)kΩ (9.7)kΩ 7.2 (27.9)kΩ (260.0)kΩ (12.2)kΩ 7.3 (31.0)kΩ (15.1)kΩ 7.4 (34.4)kΩ 139.0k (18.4)kΩ 7.5 (38.3)kΩ 18.2k 63.5k (22.3)kΩ 7.6 (42.8)kΩ 3.9 13.1k 38.3k (26.9)kΩ 7.8 (53.9)kΩ 4.0 9.5k 25.7k (32.5)kΩ 8.0 (69.6)kΩ 4.1 6.8k 18.2k (39.2)kΩ 8.2 (93.0)kΩ 4.2 4.7k 13.1k (47.6)kΩ 8.4 (132.0)kΩ 4.3 3.0k 9.5k (58.5)kΩ 8.6 (210.0)kΩ 4.4 1.7k 6.8k (73.0)kΩ 8.8 (445.0)kΩ 4.5 0.5k 4.7k (93.2)kΩ 9.0 4.6 3.0k (124.0)kΩ 9.2 63.5k 4.7 1.7k (174.0)kΩ 9.4 25.7k 4.8 0.5k (275.0)kΩ 9.6 13.1k (579.0)kΩ 9.8 6.8k 10.0 3.0k 4.9 5.0 5.1 R1 = (Blue) 190.0k R2 = Black For technical support and more information, see inside back cover or visit www.ti.com/powertrends Application Notes PT6620 Series Using the Standby Function on the PT6620 Series of 12V Bus Converters Figure 1 For applications requiring output voltage On/Off control, the 14-pin PT6620 ISR series incorporates a standby function. This feature may be used for power-up/shutdown sequencing, and wherever there is a requirement for the output status of the module to be controlled by external circuitry. The standby function is provided by the STBY* control, pin 3. If pin 3 is left open-circuit the regulator operates normally, providing a regulated output whenever a valid supply voltage is applied to Vin (pins 4, 5, & 6) with respect to GND (pins 7-10). Connecting pin 3 to ground 2 will disable the regulator output and reduce the input current to less than 30mA 4. Grounding the standby control will also hold-off the regulator output during the period that input power is applied. The standby input is ideally controlled with an opencollector (or open-drain) discrete transistor (See Figure 1). It can also be driven directly from a dedicated TTL3 compatible gate. Table 1 provides details of the threshold requirements. Table 1 Inhibit Control Thresholds (2,3) Parameter Min Max Enable (VIH) Disable (VIL) 1V –0.1V 1 Vsense 4,5,6 V in PT6620 Vin STBY + 3 GND 7,8,9,10 Vo 11,12,13 Vo Vo(adj) + 14 C in C out COM COM Q1 BSS138 Inhibit +5V V in Turn-On Time: Turning Q1 in Figure 1 off, removes the lowvoltage signal at pin 3 and enables the output. The PT6620 series of regulators will provide a fully regulated output voltage within 20ms. The actual turn-on time may vary with load and the total amount of output capacitance. Figure 2 shows the typical output voltage waveform of a PT6625 (5.0V) following the prompt turn-off of Q1 at time t =0 secs. The waveform was measured with a 12V input voltage, and 5A resistive load. 5V 0.3V Figure 2 Notes: 1. The Standby/Inhibit control logic is similar for all Power Trends’ modules, but the flexibility and threshold tolerances will be different. For specific information on this function for other regulator models, consult the applicable application note. 2. The Standby input on the PT6620 regulator series may be controlled using either an open-collector (or open-drain) discrete transistor, or a device with a totem-pole output. A pull-up resistor is not necessary. The control input has an open-circuit voltage of about 1.5Vdc. To disable the regulator output, the control pin must be “pulled” to less than 0.3Vdc with a low-level 0.25mA max. sink to ground. 3. The Standby input on the PT6620 series is also compatible with TTL logic. A standard TTL logic gate will meet the 0.3V VIL(max) requirement (Table 1 ) at 0.25mA sink current. Do not drive the Standby control input above 5Vdc. 4. When the regulator output is disabled the current drawn from the input source is reduced to approximately 15mA (30mA maximum). 5. The turn-off time of Q1, or rise time of the standby input is not critical on the PT6620 series. Turning Q1 off slowly, over periods up to 100ms, will not damage the regulator. However, a slow turn-off time will increase both the initial delay and rate-of-rise of the output voltage. Vo (2V/Div) 0 2 For technical support and more information, see inside back cover or visit www.ti.com/powertrends 4 6 8 10 t (milli - secs) 12 14 16 18 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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. 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