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Infineon Technologies IR3823AMTRPBFAUMA1
- Part No.:
- IR3823AMTRPBFAUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 19-PowerVFQFN
- Datasheet:
-
IR3823AMTRPBFAUMA1.pdf
- Description:
- IC REG BUCK ADJ 3A 19IQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,383
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Product details
Overview
IR3823AMTRPBFAUMA1 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 VRMs.
For engineers reviewing the IR3823AMTRPBFAUMA1 datasheet, IR3823AMTRPBFAUMA1 pinout, IR3823AMTRPBFAUMA1 application, or IR3823AMTRPBFAUMA1 equivalent, key selection criteria include monotonic soft-start, pre-bias start-up capability, thermally compensated overcurrent protection, and ceramic-capacitor compatibility without external compensation.
Technical Context
The IR3823A implements an adaptive Fast COT architecture that delivers fast transient response and inherent stability with ceramic output capacitors-no loop compensation required. Its control logic includes dual-mode operation (FCCM/DEM), selectable soft-start times via SS pin, and monotonic startup under pre-biased output conditions.
Internal protection integrates thermally compensated current limiting, over/under-voltage detection on PVin, open-drain Power Good signaling with threshold hysteresis, and thermal shutdown at 150 °C junction temperature. The integrated LDO powers internal circuitry from Vin, enabling single-rail system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous DC load current capability with thermal derating above 85 °C ambient. |
| 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 0.6–5.5 V output programming with <±1% total output error over line/load/temp. |
| Switching Frequency | 600 kHz to 2 MHz - programmable via resistor on TON/MODE pin; higher frequencies reduce inductor size but increase switching loss. |
| Soft-Start Options | Two monotonic soft-start durations (1.2 ms or 4.8 ms) selected by SS pin connection to VCC or GND. |
| Junction Temp Range | −40 °C to +125 °C operating; +150 °C absolute max - qualified for industrial applications per JEDEC 47/20/22. |
| Package | 3.5 mm × 3.5 mm PQFN-16 - thermally enhanced exposed pad for PCB heat sinking. |
Pinout & Package
IR3823AMTRPBFAUMA1 is housed in a 3.5 mm × 3.5 mm, 16-pin PQFN package with exposed thermal pad. Pin 1 is FB; pins 4, 9, 13, and 16 are AGND; pin 3 is NC (internally connected, must float); PGND (pin 10) and SW (pin 11) are power terminals routed to external inductor and input capacitors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (1) | Voltage feedback input | Connects to resistor divider from Vo; sets output voltage with 0.6 V reference; high-impedance analog node requiring clean layout. |
| SS (2) | Soft-start mode select | Ground or tie to VCC/LDO to select 1.2 ms or 4.8 ms monotonic ramp; enables safe startup into pre-biased rails. |
| TON/MODE (5) | Frequency & operation mode | Resistor-to-ground sets one of eight switching frequencies and selects FCCM (forced CCM) or DEM (diode emulation) for light-load efficiency. |
| PGood (6) | Power status output | Open-drain signal active high when Vo is within ±7.5% of target; requires external pull-up to VCC/LDO or system rail. |
| Vin (7) | LDO input supply | Connected directly to PVin; powers internal analog circuitry and feedforward block; bypassed with 4.7 µF ceramic to PGND. |
| VCC/LDO (8) | Internal LDO output | Provides regulated ~4.0 V for gate drivers and logic; bypassed with 2.2–10 µF ceramic to PGND. |
| PGND (10) | Power ground return | High-current return path for MOSFETs and input/output capacitors; must be tied to AGND at single point near IC. |
| SW (11) | Switch node | Drives external inductor; carries high di/dt; requires short, low-inductance routing to minimize EMI and ringing. |
| PVin (12) | Main power input | High-current input for power stage; bypassed with multiple ceramics close to PVin and PGND pins. |
| BOOT (14) | High-side driver supply | Connected to SW via 0.1 µF bootstrap capacitor; enables floating gate drive for high-side MOSFET. |
| En (15) | Enable control | Active-high digital input; monitors PVin voltage level; asserts PGood only after valid enable and stable output. |
Key Features
| Feature | Design Value |
|---|---|
| Fast Constant On-Time Control | Eliminates need for external compensation components while maintaining stability with ceramic output capacitors across full load and temperature range. |
| Thermally Compensated OCP | Current limit threshold scales inversely with junction temperature to maintain consistent fault protection across −40 °C to +125 °C operation. |
| Pre-Bias Start-Up | Allows safe turn-on when output voltage is already present (e.g., hot-swap or rail-sharing systems), preventing reverse current flow. |
| Monotonic Soft-Start | Guarantees monotonic output voltage ramp regardless of input or load conditions, avoiding undershoot or oscillation during startup. |
| Integrated Bootstrap Diode | Reduces external component count by embedding bootstrap diode in package; eliminates discrete diode and associated layout complexity. |
Applications
| Server VRM | Storage Controller Power |
|---|---|
Use Scenario: Regulating 1.8 V or 3.3 V core power for Xeon Scalable CPU I/O or memory interface buffers in 1U/2U rack servers. IC Role / Device Role / Timing Role: Primary point-of-load (POL) regulator delivering tightly regulated, low-noise 3 A output with fast transient response to dynamic CPU load steps. Use Value: Enables compliance with Intel VR14/VR15 specifications via monotonic start-up, ±0.5% reference accuracy, and <10 µs load-step response. | Use Scenario: Powering NVMe SSD controller ASICs and PCIe switch logic in enterprise storage enclosures with strict thermal envelope limits. IC Role / Device Role / Timing Role: Secondary POL regulator supplying 1.2 V or 1.8 V to high-speed SerDes and flash management units with minimal board area. Use Value: Achieves >92% peak efficiency at 12 V input due to integrated low-RDS(on) MOSFETs and FCCM/DEM mode selection, reducing heatsink requirements. |
| Telecom Line Card | Distributed PoL in Baseband Units |
Use Scenario: Providing isolated 5 V or 3.3 V bias to FPGA configuration circuits and transceiver PHYs on 48 V-powered telecom line cards. IC Role / Device Role / Timing Role: Input-stage buck converter stepping down intermediate 12 V bus to FPGA I/O rails with tight ripple (<10 mVpp) and fast line regulation. Use Value: Maintains <±1% output regulation across 4.3–17 V input variation and 10–90% load steps, meeting GR-1089 immunity requirements. | Use Scenario: Delivering 1.0 V core voltage to multi-core baseband processors in 5G massive MIMO radio units with constrained airflow and high ambient temperature. IC Role / Device Role / Timing Role: Compact, thermally robust POL regulator operating continuously at 85 °C ambient with derated 2.5 A output. Use Value: PQFN package with exposed pad achieves <30 °C/W θJA on 2 oz copper, enabling reliable operation without forced air cooling. |
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, fixed 500 kHz frequency, no programmable soft-start or pre-bias start-up. | Suitable for cost-sensitive, lower-current embedded applications where monotonic startup is not required. | Select MP2315 if board space and BOM count are prioritized over industrial-grade reliability and advanced startup features. |
| TPS543320RHLR (TI) | 3 A, PMBus-enabled, 400 kHz–2.2 MHz frequency, but requires external MOSFETs and compensation network. | Preferred for systems needing telemetry, margining, or dynamic voltage scaling via digital interface. | Choose TPS543320 when digital control, telemetry, or design flexibility outweighs integration and layout simplicity. |
Compared with MP2315DJ-LF-Z and TPS543320RHLR, IR3823AMTRPBFAUMA1 uniquely combines full integration (MOSFETs + LDO + bootstrap diode), pre-bias start-up, monotonic soft-start, and ceramic-capacitor stability in a 3.5×3.5 mm PQFN-making it optimal for space-constrained, high-reliability industrial POL designs without digital control overhead.
Availability
IR3823AMTRPBFAUMA1 is available at Aetrix Electronics and suitable for server VRMs, telecom line cards, and storage controller power supplies requiring stable component supply, long-term lifecycle support, and industrial-qualified performance.
Supply support for IR3823AMTRPBFAUMA1 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 leader specializing in power management, automotive MCUs, and industrial control ICs, with global manufacturing and qualification infrastructure.
The IR3823A belongs to Infineon's IPOL (Integrated POL) family, designed specifically for compact, high-efficiency point-of-load regulation in datacenter, telecom, and industrial edge equipment where thermal density and startup reliability are critical.
FAQ
What is the minimum recommended output capacitance for stable operation?
The IR3823A is stable with ≥22 µF total ceramic output capacitance (X5R/X7R, 6.3 V rating). Layout best practice requires placing ≥10 µF close to FB and PGND pins, with remaining capacitance distributed near the load. ESR is not required-unlike voltage-mode controllers, Fast COT eliminates ESR dependency for loop stability.
How does the thermally compensated overcurrent protection behave across temperature?
OCP threshold decreases linearly as junction temperature rises-from 4.5 A at −40 °C to ~3.2 A at +125 °C-to maintain constant power dissipation and prevent thermal runaway. This behavior is implemented via on-die temperature sensing and analog current-limit scaling, verified per JEDEC JESD22-A108.
Can the IR3823A operate with a 3.3 V input supply?
No. The absolute minimum PVin is 4.3 V per datasheet Section 5 (Absolute Maximum Ratings) and Section 7.1 (Recommended Operating Conditions). Operation below 4.3 V risks improper gate drive, LDO dropout, and failure to assert Power Good. For 3.3 V input, consider the IR38164 or similar lower-Vin IPOL device.
Is the BOOT pin internally connected to SW in the IR3823A?
No. BOOT must be externally connected to SW through a 0.1 µF ceramic capacitor (X7R, 16 V). The internal high-side driver uses this bootstrap node to generate gate voltage above SW potential. Leaving BOOT unconnected or shorted to SW disables high-side FET operation and causes immediate fault shutdown.
IR3823AMTRPBFAUMA1 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
IR3823AMTRPBFAUMA1 FAQ
1.How can I place an order for IR3823AMTRPBFAUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3823AMTRPBFAUMA1 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 IR3823AMTRPBFAUMA1 reliable?
The price and inventory of IR3823AMTRPBFAUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3823AMTRPBFAUMA1 is usually 5 days.
3.What payment methods are accepted for IR3823AMTRPBFAUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3823AMTRPBFAUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3823AMTRPBFAUMA1?
IR3823AMTRPBFAUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3823AMTRPBFAUMA1 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 IR3823AMTRPBFAUMA1?
For technical support, including IR3823AMTRPBFAUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3823AMTRPBFAUMA1 requirements.
6.How does Aetrix verify that IR3823AMTRPBFAUMA1 is sourced from the original manufacturer or authorized distributors?
All IR3823AMTRPBFAUMA1 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 IR3823AMTRPBFAUMA1 meets industry standards.
7.What is the process for return or replacement of IR3823AMTRPBFAUMA1?
All IR3823AMTRPBFAUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with IR3823AMTRPBFAUMA1, 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 IR3823AMTRPBFAUMA1 part is unused and in its original packaging.
Return procedure for IR3823AMTRPBFAUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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