PT3400 TI | Alldatasheet
Document overview
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Technical content
Features
- Input Voltage Range: 36V to 75V
- 35W Output Power
- 90% Efficiency
- 1500 VDC Isolation
- Low Profile (8 mm)
- Adjustable Output Voltage
- Dual-Logic On/Off Enable
- Power-Up Sequence Control PT3400 Series 35-W 48-V Input Isolated DC/DC Converter SLTS164B - JUL Y 2002 - REVISED OCTOBER 2002
Ordering Information
PT3401/G72 =3.3V/10A (33W) PT3402/G72 = 2.5V/12A (30W) PT3403/G72 =1.8V/12A (21.6W) PT3404/G72 =1.5V/16A (24W) PT3405/G72 =1.4V/16A (22.4W) PT3406/G72 =1.2V/16A (19.2W) PT3407/G72 = 1V/16A (16W) PT3408/G72 = 5V/7A (35W) Pin-Out Information Pin Function
1 EN 1
2 EN 2*
3– V in 4+ V in 5S E Q 6V out Adj 7– V sense 8– V out 9– V out 10 –V out 11 +V out 12 +V out 13 +V out 14 +V sense * Negative logic Shaded functions indicate those pins that are referenced to –V in.
Description
The PT3400 Excalibur™ power modules are a series of 35-W rated DC/DC converters housed in a low-profile space-saving copper case. Fully isolated for telecom applications, the series includes a number of standard volt- ages, including 1.0 VDC. Other applications include industrial, high-end computing, and other distributed power applications that require input-to-output isolation. PT3400 modules incorporate a feature that simplifies the design of multiple voltage power supplies in DSP and ASIC applications. Using the SEQ control pin, the output voltage of two PT3400 modules in a power supply system can be made to self sequence at power- up. Other features include output voltage adjust, over-curr ent protection, input under- voltage lockout, and a differential remote sense to compensate for any voltage drop between the converter and load.
- Differential Remote Sense
- Over-Current Protection
- Space Saving Package
- Solderable Copper Case
- Safety Approvals Pending PT Series Suffix (PT1234x) Case/Pin Order Package Configuration Suffix Code Vertical N (EPL) Horizontal A (EPM) SMD C (EPN) (Reference the applicable package code draw- ing for the dimensions and PC board layout) L O A D * Remote Sense (–) Remote Sense (+) +VOUT –VOUT VO Adj +VIN –VIN SEQ † COUT 330µF PT3400 11–13 8–10 –VIN +V IN EN 1 EN 2 SEQ V o Adj +V OUT –V OUT +V SENSE –VSENSE † An output capacitor is required on models with an output voltage less than 2.5V. * –Vsense (pin 7) must be connected to -Vout , either at the load or directly to pin 8 of the converter.
For technical support and more information, see inside back cover or visit www.ti.com PT3400 Series 35-W 48-V Input Isolated DC/DC Converter SL TS164B - JUL Y 2002 - REVISED OCTOBER 2002 Specifications (Unless otherwise stated, T a =25°C, Vin =48V, Cin =0µF, Io =Iomax, and Cout as required) PT3400 Series Characteristic Symbol Conditions Min Typ Max Units Output Current I o Over Vin range V o ≤ 1.5V 0 — 16 Vo = 1.8V/2.5V 0 — 12 AVo = 3.3V 0 — 10 Vo = 5V 0 — 7 Input Voltage Range V in Over Io Range 36 48 75 VDC Set Point Voltage Tolerance V o t o l —± 1± 2% V o Temperature Variation Reg temp –40° ≤Ta ≤ +85°C, Io =Iomin — ±0.8 — %V o Line Regulation Reg line Over Vin range V o = 5.0V — ±5 ±20 mV Vo ≤ 3.3V — ±5 ±15 mV Load Regulation Reg load Over Io range V o = 5.0V — ±1 ±15 (1) mV Total Output Voltage Variation ∆Votot Includes set-point, line, load, —± 2± 3% V o–40° ≤Ta ≤ +85°C Efficiency η Io =70% of Iomax V o = 5V — 91 — Vo = 3.3V — 90 — Vo = 2.5V — 89 — Vo = 1.4V — 84 — Vo = 1.2V — 82 — Vo = 1V — 80 — Vo Ripple (pk-pk) V r 20MHz bandwidth V o ≥ 3.3V — 50 — mVppVo ≤ 2.5V — 25 — Transient Response t tr 0.1A/µs load step, 50% to 75% Iomax — 100 — µs ∆Vtr Vo over/undershoot — ±4 — %V o Output Adjust V adj Vo ≥ 2.5V –5 — +5 %VoVo ≤ 1.8V –0 — +10 Over-Current Threshold I TRIP Vin =36V V o = 5.0V — 9 — Vo = 3.3V — 12.5 — Vo ≤ 1.5V — 20 — Switching Frequencyƒ s Over Vin range 250 300 350 kHz Under-Voltage Lockout UVLO Rising — 34 — VFalling — 32 — Enable On/Off (Pins 1, 2) Referenced to –V in (pin 3) Input High Voltage V IH 5 — Open (2) V Input Low Voltage V IL –0.3 — +0.4 Input Low Current I IL — 0.5 — mA Standby Input Current I in standbypins 1 & 3 connected — 5 — mA Internal Input Capacitance C in — 1.0 — µF External Output Capacitance C out Vo =1.0V 470 (3) — TBD Vo ≤1.8V 330 (3) — TBD µF Vo ≥2.5V 0 — TBD Isolation Voltage Input–output/input–case 1500 — — V Capacitance Input to output — 1500 — pF Resistance Input to output 10 — — M Ω Operating Temperature Range T a Over Vin range –40 (4) — 8 5 (5) °C Solder Reflow Temperature T reflow Surface temperature of module pins or case — — 215 (6) °C Storage Temperature T s — –40 — 125 °C ReliabilityMTBF Per Bellcore TR-332 2.8 — — 10 6 Hrs50% stress, Ta =40°C, ground benign Mechanical Shock — Per Mil-Std-883D, method 2002.3, — TBD — G’s1mS, half-sine, mounted to a fixture Mechanical Vibration — Mil-Std-883D, Method 2007.2, Vertical — TBD (7) — G’s20-2000Hz, PCB mounted Horizontal — TBD (7) — Weight — — — 34 — grams Flammability— Materials meet UL 94V-0 Notes: (1) If the remote sense feature is not being used, –V sense (pin 7) must be connected to –V out (pin 8). (2) The On/Off Enable inputs (pins 1 & 2) have internal pull-ups. They may either be connected to –V in or left open circuit. Leaving pin 1 open-circuit and connecting pin 2 to –Vin allows the the converter to operate when input power is applied. The maximum open-circuit voltage of the Enable pins is 10V. (3) An output capacitor is required for proper operation for all models in which the output voltage is 1.8VDC or less. For model s with an output voltage of 2.5V or higher an output capacitor is optional. (4) For operation below 0°C, Cout must have stable characteristics. Use low ESR tantalum capacitors, or capacitors with a polyme r type dielectric. (5) See Safe Operating Area curves or contact the factory for the appropriate derating. (6) During reflow of SMD package version do not elevate the module case, pins, or internal component temperatures above a peak o f 215°C. For further guidance refer to the application note, “Reflow Soldering Requirements for Plug-in Surface Mount Products,” (SLTA051). (7) The case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package o utline drawing.
For technical support and more information, see inside back cover or visit www.ti.com Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures Efficiency vs Output Current Ripple vs Output Current Power Dissipation vs Output Current PT3408, 5VDC (See Note A) Typical CharacteristicsPT3400 Series 35-W 48-V Input Isolated DC/DC Converter PT3401, 3.3 VDC (See Note A) PT3402, 2.5 VDC (See Note A) Efficiency vs Output Current Ripple vs Output Current Power Dissipation vs Output Current Efficiency vs Output Current Ripple vs Output Current Power Dissipation vs Output Current Safe Operating Area (See Note B) PT3401; VIN =60V Safe Operating Area (See Note B) PT3408; VIN =60V Safe Operating Area (See Note B) PT3402; VIN =60V 02468 1 0 Iout (A) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 02468 1 0 1 2 Iout (A) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 100 01234567 Iout (A) Efficiency - % 36.0V 48.0V 60.0V 75.0V VIN 01234567 Iout (A) Ripple - mV 75.0V 60.0V 48.0V 36.0V VIN 01234567 Iout (A) Pd - Watts 75.0V 60.0V 48.0V 36.0V VIN 01234567 Iout (A) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 100 02468 1 0 Iout (A) Efficiency - % 36.0V 48.0V 60.0V 75.0V VIN 02468 1 0 Iout (A) Ripple - mV 75.0V 60.0V 48.0V 36.0V VIN 02468 1 0 Iout (A) Pd - Watts 75.0V 60.0V 48.0V 36.0V VIN 100 02468 1 0 1 2 Iout (A) Efficiency - % 36.0V 48.0V 60.0V 75.0V VIN 02468 1 0 1 2 Iout (A) Ripple - mV 75.0V 60.0V 48.0V 36.0V VIN 02468 1 0 1 2 Iout (A) Pd - Watts 75.0V 60.0V 48.0V 36.0V VIN SLTS164B - JUL Y 2002 - REVISED OCTOBER 2002
For technical support and more information, see inside back cover or visit www.ti.com PT3403, 1.8 VDC (See Note A) PT3400 Series 35-W 48-V Input Isolated DC/DC Converter Typical Characteristics PT3404/5, 1.5/1.4 VDC (See Note A) PT3406, 1.2 VDC (See Note A) Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures Efficiency vs Output Current Ripple vs Output Current Power Dissipation vs Output Current Efficiency vs Output Current Ripple vs Output Current Power Dissipation vs Output Current Efficiency vs Output Current Ripple vs Output Current Power Dissipation vs Output Current Safe Operating Area (See Note B) PT3404; VIN =60V Safe Operating Area (See Note B) PT3403; VIN =60V Safe Operating Area (See Note B) PT3406; VIN =60V 048 1 2 1 6 Iout (A) Ripple - mV 75.0V 60.0V 48.0V 36.0V VIN 100 0 4 8 12 16 Iout (A) Efficiency - % 36.0V 48.0V 60.0V 75.0V VIN 048 1 2 1 6 Iout (A) Pd - Watts 75.0V 60.0V 48.0V 36.0V VIN 100 0369 1 2 Iout (A) Efficiency - % 36.0V 48.0V 60.0V 75.0V VIN 0369 1 2 Iout (A) Ripple - mV 75.0V 60.0V 48.0V 36.0V VIN 0369 1 2 Iout (A) Pd - Watts 75.0V 60.0V 48.0V 36.0V VIN 100 0 4 8 12 16 Iout (A) Efficiency - % 36.0V 48.0V 60.0V 75.0V VIN 0 4 8 12 16 Iout (A) Ripple - mV 75.0V 60.0V 48.0V 36.0V VIN 048 1 2 1 6 Iout (A) Pd - Watts 75.0V 60.0V 48.0V 36.0V VIN 048 1 2 1 6 Iout (A) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 048 1 2 1 6 Iout (A) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 02468 1 0 1 2 Iout (A) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow SL TS164B - JUL Y 2002 - REVISED OCTOBER 2002
For technical support and more information, see inside back cover or visit www.ti.com PT3400 Series 35-W 48-V Input Isolated DC/DC Converter Typical Characteristics 100 0 4 8 12 16 Iout (A) Efficiency - % 36V 48V 60V 75V VIN PT3407, 1.0 VDC (See Note A) Efficiency vs Output Current Ripple vs Output Current Power Dissipation vs Output Current Safe Operating Area (See Note B) PT3406; VIN =60V 048 1 2 1 6 Iout (A) Ripple - mV 75V 60V 48V 36V VIN 048 1 2 1 6 Iout (A) Pd - Watts 75V 60V 48V 36V VIN 048 1 2 1 6 Iout (A) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow SLTS164B - JUL Y 2002 - REVISED OCTOBER 2002 Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer’s maximum operating temperatures
For technical support and more information, see inside back cover or visit www.ti.com Operating Features of the PT3400 Series of Isolated DC/DC Converters Under-Voltage Lockout An Under-Voltage Lock-Out (UVLO) inhibits the opera- tion of the converter until the input voltage is above the UVLO threshold (see the data sheet specification). Below this voltage, the module’s output is held off, irrespective of the state of either the EN1 & EN2 enable controls. The UVLO allows the module to produce a clean transi- tion during both power-up and power-down, even when the input voltage is rising or falling slowly. It also reduces the high start-up current during normal power-up of the converter, and minimizes the current drain from the input source during low-input voltage conditions. The UVLO threshold includes about 1V of hysteresis. If EN2 (pin 2) is connected to -V in (pin 3) and EN1 (pin 1) is left open, the module will automatically power up when the input voltage rises above the UVLO threshold (see data sheet ‘Standard Application’ schematic). Once operational, the converter will conform to its operating specifications when the minimum specified input voltage is reached. Over-Current Protection To protect against load faults, the PT3400 series incor- porates output over-current protection. Applying a load that exceeds the converter’s over-current threshold (see applicable specification) will cause the regulated output to shut down. Following shutdown the module will peri- odically attempt to automatically recover by initiating a soft-start power-up. This is often described as a “hiccup” mode of operation, whereby the module continues in the cycle of succesive shutdown and power up until the load fault is removed. Once the fault is removed, the converter then automatically recovers and returns to normal op- eration. Primary-Secondary Isolation Electrical isolation is provided between the input termi- nals (primary) and the output terminals (secondary). All converters are production tested to a primary-secondary withstand voltage of 1500VDC. This specification com- plies with UL60950 and EN60950 and the requirements for operational isolation. Operational isolation allows these converters to be configured for either a positive or negative input voltage source. The data sheet ‘Pin-Out Information’ uses shading to indicate which pins are associated with the primary. They include pins 1 through 4, inclusive. Input Current Limiting The converter is not internally fused. For safety and overall system protection, the maximum input current to the converter must be limited. Active or passive current limiting can be used. Passive current limiting can be a fast acting fuse. A 125-V fuse, rated no more than 5A, is recommended. Active current limiting can be imple- mented with a current limited “Hot-Swap” controller. Thermal Considerations Airflow may be necessary to ensure that the module can supply the desired load current in environments with elevated ambient temperatures. The required airflow rate may be determined from the Safe Operating Area (SOA) thermal derating chart (see converter specifica- tions). The recommended direction for airflow is into the longest side of the module’s metal case. See Figure 1-1. Figure 1-1 PT3400 Series Recommended direction for airflow is into (perpendicular to) the longest side Application Notes
For technical support and more information, see inside back cover or visit www.ti.com Adjusting the Output Voltage of the 30W-Rated PT3400 Series of Isolated DC/DC Converters The output voltage of the PT3400 Excalibur™ series of isolated DC/DC converters may be adjusted over a limited range from the factory-trimmed nominal value. Adjust- ment is accomplished with a single external resistor. The placement the resistor determines the direction of adjust- ment, either up or down, and the value of the resistor the magnitude of adjustment. Table 3-1 gives the allowable adjustment range for each model in the series as V a (min) and Va (max) respectively. Note that converters with an output voltage of 1.8V or less can only be adjusted up 1. Adjust Up: An increase in the output voltage is obtained by adding a resistor, R1 between Vo Adj (pin 6), and –Vsense (pin 7). Adjust Down (PT3401, PT3402, & PT3408 Only) : Add a resistor (R2), between Vo Adj (pin 6) and +Vsense (pin 14). Refer to Figure 3-1 and Table 3-2 for both the placement and value of the required resistor, R1 or (R2). The values of R1 [adjust up], and (R2) [adjust down], can also be calculated using the following formulas. R1 = 2 · Ro – Rs kΩ Va – Vo (R2) = R o (Va – 2) – Rs kΩ Vo – Va Where, Va = Adjusted output voltage Vo = Original output voltage Ro = Resistor constant in Table 3-1 Rs = Internal series r esistance in Table 3-1 Figure 3-1 Notes: 1. The output voltage of the PT3401 (3.3V), PT3402 (2.5V), and PT3408 (5V) may be adjusted either higher or lower. All other models, which have an output voltage of 1.8V or less, can only be adjusted higher. 2. Use only a single 1% resistor in either the R1 or (R2) location. Place the resistor as close to the converter as possible. 3. Never connect capacitors to Vo Adj. Any capacitance added to this pin will affect the stability of the converter. 4. If the output voltage is increased, the maximum load current must be derated according to the following equation. Io(max) = Vo × Io(rated) Va In any instance, the load current must not exceed the converter’s rated output current I o(rated) in Table 3-1. PT3400 Series L O A D * Remote Sense (–) Remote Sense (+) +VOUT –VOUT +VIN –VIN † COUT 330µF R 1 Ad just Up (R2) Adj Down PT3400 11–13 8–10 –V IN +V IN EN 1 EN 2 SEQ V o Adj +VOUT –V OUT +VSENSE –VSENSE
For technical support and more information, see inside back cover or visit www.ti.com Application Notes continued Table 3-2 DC/DC CONVERTER ADJUSTMENT RESISTOR VALUES Series Pt # PT3408 PT3401 PT3402 PT3403 PT3404 PT3405 PT3406 PT3407 Va(req’d) V a(req’d) R1 = Black R 2 = (Blue) 5.25 4.5k Ω 5.20 22.2k Ω 5.15 51.8k Ω 5.10 111.0k Ω 5.05 288.0k Ω 5.00 4.95 (457.0)kΩ 4.90 (191.0)kΩ 4.85 (102.0)kΩ 4.80 (57.7)kΩ 4.75 (31.1)kΩ 3.465 51.8k Ω 3.432 81.4k Ω 3.399 131.0k Ω 3.366 229.0k Ω 3.333 525.0k Ω 3.330 3.267 (308.0)kΩ 3.234 (116.0)kΩ 3.201 (51.9)kΩ 3.168 (19.9)kΩ 3.135 (0.0)kΩ 2.625 131.0k Ω 2.600 171.0k Ω 2.575 237.0k Ω 2.550 371.0k Ω 2.525 771.0k Ω 2.500 2.475 (161.0)kΩ 2.450 (60.6)kΩ 2.425 (27.3)kΩ 2.400 (10.6)kΩ 2.375 (0.0)kΩ 1.975 7.7k Ω 1.950 20.0k Ω 1.925 37.3k Ω 1.900 63.3k Ω 1.875 107.0k Ω 1.850 193.0k Ω 1.825 453.0k Ω 1.800 1.650 0.0k Ω 1.625 20.0k Ω 1.600 50.0k Ω 1.575 100.0k Ω 1.550 200.0k Ω 1.525 500.0k Ω 20.0kΩ 1.500 50.0k Ω 1.475 100.0k Ω 1.450 200.0k Ω 1.425 500.0k Ω 1.400 1.32 25.0k Ω 1.30 50.0k Ω 1.28 87.5k Ω 1.26 150.0k Ω 1.24 275.0k Ω 1.22 650.0k Ω 1.20 8.5k Ω 1.15 33.5k Ω 1.10 83.5k Ω 1.08 121.0k Ω 1.06 184.0k Ω 1.04 309.0k Ω 1.02 683.0k Ω 1.00 PT3400 Series Table 3-1 DC/DC CONVERTER ADJUSTMENT RANGE AND FORMULA PARAMETERS Series Pt # PT3408 PT3401 PT3402 PT3403 PT3404 PT3405 PT3406 PT3407 Io (rated) 4 7A 10A 12A 12A 16A 16A 16A 16A Va(min) 4.75V 3.135V 2.375V N/A 1 N/A 1 N/A 1 N/A 1 N/A 1
For technical support and more information, see inside back cover or visit www.ti.com Application Notes Using the Power-Up Sequencing Feature of the PT3400 Series of DC/DC Converters Introduction Power-up sequencing is a term used to describe the order and timing that supply voltages power up in a multi-voltage power supply system. Multi-voltage power supply architectures are a common place requirement in electronic circuits that employ high- performance mi- croprocessors or digital signal processors (DSPs). These circuits require a tightly regulated low- voltage supply for the processor core, and a higher voltage to power the processor’s system interface or I/O circuitry. Power- up sequencing is often required between two such voltages in order to manage the voltage differential during the brief period of power-up. This reduces stress and improves the long term reliability of the dual-voltage devices and their associated circuitry. The most popular solution is termed “Simultaneous Startup,” whereby the two affected voltages both start at the same time and then rise at the same rate. Configuration for Power-up Sequencing The PT3400 series converters have a feature that allows individual modules to be easily configured for simulta- neous startup. Using the SEQ control (pin 5), two PT3400 modules are simply interconnected with just a few passive components. This eliminates much of the application circuitry that would otherwise be required for this type of setup. The schematic is given in Figure 4-1. The setup is relatively simple but varies slightly with the combination of output voltages being sequenced. Capacitor C 3 (5) is only required when the modules selected are a mix between a high-voltage module (3.3V through 1.8V), and a low- voltage module ( ≤1.5V). For all other configurations C 3 is replaced by a wire link. For clarification Table 4-1 indicates which modules are a high voltage type (Type A), and which are a low voltage type (Type B). Table 4-2 provides guidance as to the one combination that requires the capacitor C 3. Examples of waveforms obtained from a sequenced start-up between two PT3400 series modules are provided in Figure 4-2, Figure 4-3, and Figure 4-4. In each case the voltage difference during the synchronized portion of the power up sequence is typically within 0.4V. Both the timing and tracking of output voltages during the power-up sequence will vary slightly with input voltage, temperature, and with differences in the output capaci- tance and load current between the two converter modules. This power-up sequencing solution may not be suitable for every application. To ensure compatibility the appli- cation should be tested against all variances. For additional support please contact a Plug-in Power applications specialist. PT3400 Series Table 4-1; PT3400 Module Type Identification PART No. VOUT TYPE A TYPE B PT3401 (3.3V) × PT3402 (2.5V) × PT3403 (1.8V) × PT3404 (1.5V) × PT3405 (1.4V) × PT3406 (1.2V) × PT3407 (1.0V) × Table 4-2; Value of C3 in Sequencing Setup MODULE #1 MODULE #2 C 3 COMMENTS A A Wire link Waveforms given in Figure 4-2 B B Wire link Waveforms given in Figure 4-3 A B 0.1µF (5) Waveforms given in Figure 4-4 Notes 1. The two converters configured for sequenced power up must be located close together on the same printed circuit board. 2. When configured for power-up sequencing, a minimum of 1,000µF output capacitance is recommended at the output of each converter. 3. The best results are obtained if a load of 1A or greater is present at both converter outputs. 4. The capacitors, C 1 and C2, should each be placed close to their associated converter, Module #1, and Module #2 respectively. Combining C1 and C2 to a single capacitor of equivalent value is not recommended. 5. The capacitor C3 is only required whenever a Type A and Type B converter are connected together for sequenced power-up. In this event C 3 should always be connected to the SEQ control (pin 5) of the Type B module, or the converter with the lowest output voltage. For all other converter configurations C 3 is not required, and is replaced by a copper trace or wire link. 6. The capacitors selected for C1, C2, & C3 should be of good quality and have stable characteristics. Capacitors with an X7R dielectric, and 5% tolerance are recommended. 7. The enable controls, EN1 & EN2, are optional for a sequenced pair of converters. If an enable signal is desired, EN1 or EN2 of both converters units must be controlled from a single transistor.
For technical support and more information, see inside back cover or visit www.ti.com Figure 4-1; Configuration for Power-Up Sequencing Remote Sense (–) Remote Sense (+) +V IN –V IN † COUT 1,000µF Remote Sense (–) Remote Sense (+) † COUT 1,000µF 1 =Inhibit Q 1 BSS138 (Note 8) C 2 0.1µF (Note 4) Module #1 (Highest Vo) 11–13 8–10 –VIN +V IN EN 1 EN 2 SEQ V o Adj +V OUT –VOUT +Sense –Sense C 1 0.1µF (Note 4) Module #2 (Lowest Vo) 11–13 8–10 –VIN +V IN EN 1 EN 2 SEQ V o Adj +V OUT –VOUT +Sense –Sense C 3 (Note 5 & Table 4-2 ) LOAD Vo1 LOAD Vo2 † For sequencing configurations, a 1,000µF electrolytic capacitor is recommended at the output of each converter. See Note 2. PT3400 Series
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