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Infineon Technologies IR3823AMTRPBFXUMA1
- Part No.:
- IR3823AMTRPBFXUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 19-PowerVFQFN
- Datasheet:
-
IR3823AMTRPBFXUMA1.pdf
- Description:
- IC REG BUCK ADJ 3A 19IQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,721
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Product details
Overview
IR3823AMTRPBFXUMA1 from Infineon is a fully integrated 3 A synchronous buck regulator with Fast Constant On-Time (COT) control, 4.3–17 V input range, 0.6 V ±0.5% reference voltage, and programmable 600 kHz–2 MHz switching frequency. It integrates high- and low-side MOSFETs, bootstrap diode, and internal LDO for single-supply operation, targeting point-of-load regulation in server and telecom power rails.
For engineers reviewing the IR3823AMTRPBFXUMA1 datasheet, IR3823AMTRPBFXUMA1 pinout, IR3823AMTRPBFXUMA1 application, or IR3823AMTRPBFXUMA1 equivalent, this device supports monotonic start-up, pre-bias start-up, thermally compensated over-current protection, and dual-mode light-load efficiency (FCCM/DEM), making it suitable for high-density industrial DC-DC designs requiring fast transient response and ceramic-capacitor compatibility.
Technical Context
The IR3823A implements an adaptive Fast COT architecture that eliminates external compensation while maintaining stability with ceramic output capacitors. Its control loop uses SW node zero-cross detection and ramp-based on-time generation to achieve pseudo-constant frequency behavior across line and load variations.
It features dual-path sensing: analog feedback via FB pin with 0.6 V reference, and digital fault monitoring via En (with voltage threshold), PGood (open-drain status), and TON/MODE (resistor-programmed frequency & FCCM/DEM mode selection). Internal LDO powers gate drivers from Vin, decoupled by 4.7 µF at Vin–PGND and 2.2–10 µF at VCC/LDO–PGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous DC output current capability without forced airflow |
| Input Voltage Range | 4.3 V to 17 V - supports 5 V, 12 V, and 15 V intermediate bus architectures |
| Reference Voltage | 0.6 V ±0.5% - enables precise output setting (e.g., 1.0 V ±0.83% with 2% resistors) |
| Switching Frequency | 600 kHz to 2 MHz - resistor-programmable in 8 discrete steps for EMI tuning |
| Junction Temp Range | −40 °C to +125 °C - qualified for industrial temperature operation per JEDEC 22-A104 |
| Protection Features | Thermally compensated OCP, UVP/OVP, OTP, pre-bias start-up, monotonic soft-start - no external circuitry required |
| Package | 3.5 mm × 3.5 mm PQFN-16 - exposed thermal pad for ≤40 °C/W junction-to-board thermal resistance |
Pinout & Package
IR3823AMTRPBFXUMA1 is housed in a 3.5 mm × 3.5 mm, 16-pin PQFN package with exposed thermal pad (PGND-connected) for enhanced thermal performance. Pin 3 is NC (no connect); AGND pins (4, 9, 13, 16) are signal ground references, separate from PGND (pin 10).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Voltage feedback input | Connects to resistor divider from Vo; sets output via 0.6 V reference - determines regulation accuracy and loop stability |
| SS (Pin 2) | Soft-start configuration | Ground or float selects 2.4 ms or 4.8 ms monotonic soft-start time - prevents inrush into pre-biased rails |
| TON/MODE (Pin 5) | Frequency & mode programming | Resistor-to-ground selects one of 8 switching frequencies and FCCM vs. DEM operation - defines light-load efficiency strategy |
| PGood (Pin 6) | Power-good status output | Open-drain output pulled up to VCC/LDO or external rail; asserts after output reaches 90% of target and remains stable |
| Vin (Pin 7) | LDO input supply | Must be tied to PVin; powers internal LDO and feedforward block - requires 4.7 µF ceramic bypass to PGND |
| VCC/LDO (Pin 8) | LDO output | Provides ~4.0 V bias for gate drivers; requires 2.2–10 µF ceramic capacitor to PGND for noise immunity |
| SW (Pin 11) | Power switch node | Connects to output inductor; carries high di/dt switching current - must minimize loop area with PGND and PVin |
| PVin (Pin 12) | Main power input | High-current input for power stage; requires low-ESR bulk and ceramic caps placed adjacent to PGND |
| BOOT (Pin 14) | High-side driver supply | Connected to SW via bootstrap capacitor; generates gate drive voltage above SW for high-side MOSFET turn-on |
| En (Pin 15) | Enable control input | Active-high logic input with internal 1.2 V threshold; monitors PVin for undervoltage lockout before enabling |
Key Features
| Feature | Design Value |
|---|---|
| Fast COT Control | Eliminates external compensation components and enables stable operation with low-ESR ceramic output capacitors |
| Dual Light-Load Modes | FCCM maintains fixed frequency under all loads; DEM disables low-side FET to reduce switching losses below ~10% load |
| Monotonic Soft-Start | Two selectable times (2.4 ms / 4.8 ms) prevent output voltage undershoot or overshoot during power-up |
| Pre-Bias Start-Up | Safely starts into an already powered output rail without reverse current or latch-up risk |
| Integrated Bootstrap Diode | Removes need for external bootstrap diode - reduces BOM count and layout complexity |
Applications
| Server VR13/VR14 Core Power | Telecom Line Card Bias Rails |
|---|---|
Use Scenario: Regulating 1.0 V @ 3 A for CPU/GPU core supplies in 1U rack servers with tight thermal constraints. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator delivering tightly regulated core voltage with <1% total DC error and <50 µs load-step response. Use Value: Integrated MOSFETs and Fast COT enable compact 0.5 in² solution size and eliminate compensation design iterations. | Use Scenario: Generating 3.3 V @ 2.5 A for FPGA I/O banks and SerDes interfaces on telecom line cards operating at −5 °C to +70 °C ambient. IC Role / Device Role / Timing Role: Secondary POL regulator with pre-bias start-up supporting hot-swap insertion into live backplanes. Use Value: Thermally compensated OCP and −40 °C to +125 °C junction rating ensure reliability across extended temperature deployments. |
| Industrial PLC Digital I/O Power | Storage Controller ASIC Supply |
Use Scenario: Providing 1.8 V @ 2 A for microcontroller and interface ICs in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Isolated, self-contained buck stage with EN-controlled sequencing and PGood signaling for system-level power management. Use Value: Single 12 V input simplifies front-end design; FCCM mode ensures deterministic timing for real-time I/O control loops. | Use Scenario: Delivering 0.85 V @ 3 A to NVMe controller ASICs in enterprise SSD modules with strict ripple (<10 mVpp) and transient (<100 mV) requirements. IC Role / Device Role / Timing Role: High-accuracy, low-noise POL regulator using 0.6 V reference and ceramic output caps for sub-100 ns transient recovery. Use Value: Fast COT control achieves <30 µs full-load step recovery - critical for burst-mode NAND access timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315DJ-LF-Z (Monolithic Power) | 2 A rated, 4.5–28 V input, fixed 500 kHz frequency, no programmable soft-start or pre-bias start-up | Lacks monotonic start-up and pre-bias support - unsuitable for hot-swap or multi-rail sequencing | Select when lower current and simpler feature set suffice; verify startup behavior with existing output bias |
| TPS54332DDAR (TI) | 3 A, 3.5–28 V input, adjustable frequency (100 kHz–2.5 MHz), but requires external compensation and bootstrap diode | Higher BOM count and layout sensitivity; slower transient response than Fast COT | Choose if legacy design uses TI ecosystem or requires >2 MHz switching; accept added compensation effort |
Compared with MP2315DJ-LF-Z and TPS54332DDAR, the IR3823AMTRPBFXUMA1 delivers higher integration (integrated MOSFETs, bootstrap diode, LDO), faster transient response via Fast COT, and robust system-level features (pre-bias start-up, monotonic soft-start, thermally compensated OCP) - reducing design risk in dense, thermally constrained POL applications.
Availability
IR3823AMTRPBFXUMA1 is available at Aetrix Electronics and suitable for server VR13/VR14 core power, telecom line card bias rails, and industrial PLC digital I/O power requiring stable component supply, long-term lifecycle support, and industrial-grade qualification.
Supply support for IR3823AMTRPBFXUMA1 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
The IR38xx IPOL family targets high-efficiency, space-constrained point-of-load regulation in datacenter, telecom, and industrial systems - emphasizing integration, thermal robustness, and ease-of-use for power designers.
FAQ
What is the minimum recommended output capacitance for stable operation?
The IR3823A is optimized for ceramic output capacitors and requires ≥22 µF total effective capacitance at the output. Stability is maintained across 10–100 µF range with X5R/X7R dielectrics; ESR should be <5 mΩ. Layout must minimize trace inductance between SW, PGND, and output cap to preserve Fast COT loop integrity.
How does the TON/MODE pin configure switching frequency and operation mode?
A single resistor from TON/MODE (Pin 5) to PGND selects both frequency (600 kHz–2 MHz in 8 steps) and mode (FCCM or DEM). For example, 100 kΩ sets 1 MHz FCCM; 332 kΩ sets 600 kHz DEM. Resistor values are defined in Table 5 of the datasheet - no additional components or logic signals are needed.
Can the IR3823A start up into a pre-biased output without damaging downstream circuitry?
Yes - the IR3823A implements active pre-bias start-up: the low-side MOSFET remains off until the output voltage falls below the target, then gradually ramps up using controlled gate drive. This prevents reverse current flow and ensures monotonic rise even when Vo = 1.0 V at power-on.
What is the role of the internal LDO and how is it powered?
The internal LDO generates ~4.0 V to power gate drivers and analog circuitry. It is powered solely from Vin (Pin 7), which must be tied directly to PVin. A 4.7 µF ceramic capacitor between Vin and PGND is mandatory to stabilize the LDO input and suppress switching noise coupling.
IR3823AMTRPBFXUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 19-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 3A
- Frequency - Switching:
- 600kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-IQFN-19-900
IR3823AMTRPBFXUMA1 FAQ
1.How can I place an order for IR3823AMTRPBFXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3823AMTRPBFXUMA1 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 IR3823AMTRPBFXUMA1 reliable?
The price and inventory of IR3823AMTRPBFXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3823AMTRPBFXUMA1 is usually 5 days.
3.What payment methods are accepted for IR3823AMTRPBFXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3823AMTRPBFXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3823AMTRPBFXUMA1?
IR3823AMTRPBFXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3823AMTRPBFXUMA1 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 IR3823AMTRPBFXUMA1?
For technical support, including IR3823AMTRPBFXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3823AMTRPBFXUMA1 requirements.
6.How does Aetrix verify that IR3823AMTRPBFXUMA1 is sourced from the original manufacturer or authorized distributors?
All IR3823AMTRPBFXUMA1 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 IR3823AMTRPBFXUMA1 meets industry standards.
7.What is the process for return or replacement of IR3823AMTRPBFXUMA1?
All IR3823AMTRPBFXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with IR3823AMTRPBFXUMA1, 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 IR3823AMTRPBFXUMA1 part is unused and in its original packaging.
Return procedure for IR3823AMTRPBFXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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