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Vishay Siliconix SI9100DJ02-E3
- Part No.:
- SI9100DJ02-E3
- Manufacturer:
- Vishay Siliconix
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
SI9100DJ02-E3.pdf
- Description:
- IC REG BUCK BOOST 14PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,053
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Product details
Overview
SI9100DJ02-E3 from Vishay Siliconix is a monolithic high-voltage switchmode regulator IC integrating a 150-V, 5-Ω lateral DMOS power switch, current-mode PWM controller, 4.0 V reference (±1%), internal 1 MHz oscillator, and undervoltage lockout (8.8 V). It operates from 10–70 V input and delivers up to 3 W in flyback or buck-boost topologies - used in telecom −48 V DC-DC conversion and industrial isolated power supplies.
For engineers reviewing the SI9100DJ02-E3 datasheet, SI9100DJ02-E3 pinout, SI9100DJ02-E3 application, or SI9100DJ02-E3 equivalent, key selection criteria include its integrated 150-V MOSFET, 1 MHz oscillator programmability via ROSC, current-mode control for transient response, and PDIP-14 package with −40 °C to +85 °C industrial temperature rating.
Technical Context
The SI9100DJ02-E3 implements current-mode control using an internal error amplifier with 4.00 V feedback threshold (±0.04 V), a 1 MHz ring-oscillator whose frequency is set by an external resistor (24 kΩ to 1 MΩ), and a dedicated discharge pin for oscillator timing. Its pre-regulator supplies VCC from +VIN via a constant-current start-up circuit that disables above 9.4 V.
It features latched SHUTDOWN/RESET logic with dual-input truth table control, a 150-V DMOS output switch with intrinsic body-diode, and bias current set by a 390 kΩ resistor from BIAS to −VIN. The device supports remote synchronization via capacitive coupling to OSC IN and includes undervoltage lockout (8.8 V) with hysteresis (0.6 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 10 V to 70 V - enables direct operation from telecom −48 V systems or unregulated industrial rails without external pre-regulation. |
| Integrated MOSFET | 150 V V(BR)DSS, 5 Ω rDS(on) - eliminates need for external high-voltage switch in ≤3 W isolated or non-isolated converters. |
| Oscillator Frequency | Programmable 40 kHz to 1 MHz via ROSC - allows optimization of transformer size, EMI, and efficiency across load conditions. |
| Reference Voltage | 4.00 V ±1% - provides stable feedback threshold for precise output regulation in closed-loop designs. |
| UVLO Threshold | 8.8 V with 0.6 V hysteresis - ensures reliable startup and prevents erratic switching during brownout or low-VCC conditions. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial environments including telecom equipment and embedded power modules. |
| Package | PDIP-14 - through-hole package with 167 °C/W thermal resistance, suitable for prototyping and high-reliability board-level assembly. |
Pinout & Package
SI9100DJ02-E3 is housed in a 14-pin plastic DIP (PDIP-14) package, 19.30 mm × 8.26 mm × 5.08 mm (max), with lead (Pb)-free finish per RoHS. Pin 1 is BIAS; pin 5 is −VIN (body); pins 11 and 12 are SHUTDOWN and RESET, respectively; pin 3 is DRAIN; pin 4 is SOURCE.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | BIAS | Sets analog bias current (15 µA nominal) for internal circuits and pull-ups on SHUTDOWN/RESET via external 390 kΩ resistor to −VIN. |
| 2 | +VIN | Main high-voltage input (10–70 V); powers internal pre-regulator and supplies current to VCC during startup. |
| 3 | DRAIN | High-side switch output node connected to drain of integrated 150-V DMOS transistor. |
| 4 | SOURCE | Source terminal of internal MOSFET; used for current-sense feedback in current-mode control loop. |
| 5 | −VIN | Power ground / return path; internally connects to MOSFET body; must be tied to system ground or negative rail. |
| 6 | VCC | Internal supply rail (regulated to ~9.4 V); powers control logic; requires external bypass capacitor (≥1 µF). |
| 7 | OSC OUT | Oscillator output node; used with OSC IN and external ROSC to set switching frequency. |
| 8 | OSC IN | Oscillator input; accepts external resistor for frequency setting or SYNC pulses for remote synchronization. |
| 9 | DISCHARGE | Connects to −VIN to enable internal oscillator; open or misconnected causes oscillator failure. |
| 10 | VREF | 4.00 V reference output; buffered, high-impedance source for feedback networks or external override. |
| 11 | SHUTDOWN | Active-low latched/unlatched control input; output disabled when low; behavior depends on RESET state. |
| 12 | RESET | Latch control input; sets SHUTDOWN latch when both RESET and SHUTDOWN are low; high releases latch. |
| 13 | COMP | Error amplifier output; drives external compensation network between COMP and FB for loop stability. |
| 14 | FB | Inverting input of error amplifier; connected to voltage divider from output; compares against VREF (4.00 V). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 150-V, 5-Ω DMOS switch | Enables single-chip 3 W converter design without external HV MOSFET, reducing BOM count and layout complexity. |
| Current-mode PWM control | Provides inherent cycle-by-cycle current limiting, fast transient response, and simplified loop compensation vs. voltage-mode. |
| Programmable 1 MHz oscillator | Allows frequency tuning from 40 kHz to 1 MHz using one external resistor - balances efficiency, size, and EMI. |
| 4.00 V ±1% precision reference | Ensures tight output regulation tolerance in feedback loops without external reference IC or trimming. |
| Latched SHUTDOWN/RESET logic | Supports robust fault recovery and controlled power sequencing in telecom and industrial systems. |
| Internal start-up current source | Eliminates need for external start-up circuitry - charges VCC capacitor directly from +VIN (up to 20 mA at startup). |
Applications
| Telecom −48 V DC-DC Conversion | Flyback Isolated Power Supply |
|---|---|
|
Use Scenario: Generating regulated +5 V or −5 V outputs from a −48 V telecom battery backup rail in central office or remote terminal units. IC Role / Device Role / Timing Role: Primary-side controller and integrated power switch in non-isolated buck-boost or isolated flyback topology; provides PWM timing, current sensing, and protection. Use Value: Eliminates discrete HV MOSFET and controller IC, reducing component count and improving reliability in space-constrained telecom modules. |
Use Scenario: Providing isolated 5 V/200 mA output for microcontroller or sensor power in industrial PLCs or medical auxiliary supplies. IC Role / Device Role / Timing Role: Primary-side PWM controller with integrated 150-V switch; drives transformer primary; regulates output via optocoupler feedback to FB pin. Use Value: Enables compact, cost-effective isolated supply with <3 W output without external gate driver or HV FET. |
| Industrial Buck-Boost Converter | Embedded System Auxiliary Power |
|
Use Scenario: Generating stable 5 V or 3.3 V from wide-input industrial rails (e.g., 12–48 V) where input may dip below output voltage. IC Role / Device Role / Timing Role: Current-mode buck-boost controller with integrated switch; uses DRAIN/SOURCE pins to drive external inductor and diode. Use Value: Supports input voltages both above and below output, enabling single-supply flexibility in variable-input factory automation systems. |
Use Scenario: Providing always-on 3.3 V standby power for real-time clocks or wake-up circuitry in energy-efficient embedded devices. IC Role / Device Role / Timing Role: Low-quiescent controller with UVLO and shutdown logic; maintains regulation during brownouts and supports controlled power-down. Use Value: Delivers stable auxiliary rail with built-in protection and minimal external components - ideal for low-volume custom boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage switchmode regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC3803D-1 | Requires external 200-V MOSFET; no integrated switch; 1-MHz max oscillator; 5-V reference (±2%). | Needs additional HV FET and driver; better suited for higher-power (>5 W) or multi-output designs requiring flexibility. | Choose UCC3803D-1 when higher voltage margin (200 V) or external FET control is required; not drop-in for SI9100DJ02-E3. |
| LT3748 | Isolated flyback controller only; no integrated switch; supports up to 100 V input; requires external MOSFET and optocoupler. | Designed exclusively for isolated flyback; lacks non-isolated buck-boost capability and internal HV switch of SI9100DJ02-E3. | Choose LT3748 for safety-isolated designs needing tighter regulation and secondary-side feedback; not interchangeable in non-isolated use cases. |
Compared with UCC3803D-1 and LT3748, the SI9100DJ02-E3 uniquely integrates a 150-V MOSFET and supports both isolated and non-isolated topologies in a single PDIP-14 package - simplifying design for ≤3 W telecom and industrial power where component count and board space are critical.
Availability
SI9100DJ02-E3 is available at Aetrix Electronics and suitable for telecom power conversion, industrial isolated DC-DC supplies, and embedded auxiliary power generation requiring stable component supply and long-term industrial temperature support.
Supply support for SI9100DJ02-E3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay Siliconix is a global semiconductor manufacturer specializing in discrete power MOSFETs, diodes, optoelectronics, and integrated power ICs with emphasis on high-voltage, high-efficiency, and ruggedized solutions.
The Si9100 product line was designed for high-voltage DC-DC conversion in telecom, industrial, and instrumentation applications - integrating control, gate drive, and power switching into monolithic BiC/DMOS ICs to reduce system complexity.
FAQ
What is the maximum output power achievable with the SI9100DJ02-E3?
The SI9100DJ02-E3 is rated for up to 3 W of output power in properly designed flyback or buck-boost converters. This limit derives from thermal constraints of the PDIP-14 package (750 mW max power dissipation) and the 150-V, 5-Ω integrated MOSFET's safe operating area under typical 48 V input conditions. Actual output depends on topology, transformer design, and heatsinking.
Does the SI9100DJ02-E3 support remote synchronization of switching frequency?
Yes, the SI9100DJ02-E3 supports remote synchronization via the OSC IN pin. A positive SYNC pulse (e.g., 5 V, 0.5 µs width) capacitively coupled through a 100 pF series capacitor and 3 kΩ resistor to OSC IN will lock the internal oscillator to the external signal - useful for EMI reduction in multi-rail systems.
What is the function of the DISCHARGE pin on the SI9100DJ02-E3?
The DISCHARGE pin on the SI9100DJ02-E3 must be tied directly to −VIN (ground) to enable normal internal oscillator operation. It controls capacitor discharge timing in the ring oscillator; leaving it floating or connecting it incorrectly disables oscillator output and halts switching - a common cause of no-output failures.
Can the SI9100DJ02-E3 operate from a −48 V input rail?
Yes, the SI9100DJ02-E3 can generate regulated +5 V or −5 V outputs from a −48 V input using appropriate level-shifting or transformer-based topologies. Its −VIN pin serves as the reference ground, and +VIN accepts up to +70 V relative to −VIN - making it suitable for telecom battery-backed systems.
What is the purpose of the BIAS pin on the SI9100DJ02-E3?
The BIAS pin on the SI9100DJ02-E3 sets internal bias current for analog blocks and pull-up strength on SHUTDOWN/RESET inputs. A 390 kΩ resistor from BIAS to −VIN establishes ~15 µA nominal bias current - critical for proper error amplifier gain, oscillator accuracy, and logic input thresholds.
SI9100DJ02-E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative, Isolation Capable
- Topology:
- Buck, Buck-Boost, Flyback, Forward Converter
- Output Type:
- -
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 10V
- Voltage - Input (Max):
- 70V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- 40kHz ~ 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
SI9100DJ02-E3 FAQ
1.How can I place an order for SI9100DJ02-E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI9100DJ02-E3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI9100DJ02-E3 reliable?
The price and inventory of SI9100DJ02-E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI9100DJ02-E3 is usually 5 days.
3.What payment methods are accepted for SI9100DJ02-E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI9100DJ02-E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI9100DJ02-E3?
SI9100DJ02-E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI9100DJ02-E3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI9100DJ02-E3?
For technical support, including SI9100DJ02-E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI9100DJ02-E3 requirements.
6.How does Aetrix verify that SI9100DJ02-E3 is sourced from the original manufacturer or authorized distributors?
All SI9100DJ02-E3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI9100DJ02-E3 meets industry standards.
7.What is the process for return or replacement of SI9100DJ02-E3?
All SI9100DJ02-E3 units undergo pre-shipment inspection (PSI). If there is an issue with SI9100DJ02-E3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI9100DJ02-E3 part is unused and in its original packaging.
Return procedure for SI9100DJ02-E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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