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Infineon Technologies IR3829MTRPBF
- Part No.:
- IR3829MTRPBF
- Manufacturer:
- Infineon Technologies
- Package:
- -
- Datasheet:
-
IR3829MTRPBF.pdf
- Description:
- IC REG BUCK CTRLR PQFN
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Inventory:3,013
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Product details
Overview
IR3829MTRPBF from Infineon Technologies is a 16A synchronous buck regulator with integrated high- and low-side MOSFETs, PWM controller, bootstrap diode, and LDO. It operates from 1.0V–21V input, delivers 0.6V–0.86×Vin output, supports 300kHz–1.2MHz switching frequency, and features thermally compensated over-current protection with three selectable trip points. Used in server point-of-load power rails.
For engineers reviewing the IR3829MTRPBF datasheet, IR3829MTRPBF pinout, IR3829MTRPBF application, or IR3829MTRPBF equivalent, key selection criteria include its PQFN 5×6 mm package, 16A continuous output, feed-forward line/load regulation, monotonic start-up, and programmable PGood threshold-critical for high-density telecom and storage power systems.
Technical Context
The IR3829 implements a voltage-mode PWM control architecture with internal error amplifier, feed-forward compensation path, and digitally controlled soft-start. Its dual-ground architecture separates PGnd (power stage return) from Gnd (signal reference), minimizing noise coupling in high-dI/dt applications.
Over-current protection uses thermal compensation across junction temperature (−40°C to +125°C) and offers three discrete ILIM settings via pin strapping (float/Vcc/PGnd). The PGood output is open-drain with programmable delay and threshold, synchronized to the internal power-good comparator monitoring Vsns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 16 A continuous - supports single-rail CPU/GPU core supply without external current sharing |
| Input Voltage Range | 1.0 V to 21 V - enables direct connection to 12 V intermediate bus or 5 V auxiliary rail with external Vcc bias |
| Output Voltage Range | 0.6 V to 0.86×Vin - supports sub-1 V ASIC cores and adaptive voltage scaling down to 0.6 V ±0.6% |
| Switching Frequency | 300 kHz to 1.2 MHz - allows optimization of inductor size vs. efficiency; 600 kHz typical for 12 V→1.0 V conversion |
| RDS(on) Top/Bottom | 8.4 / 3.8 mΩ (typ) - enables >90% peak efficiency at 16 A, 12 VIN→1.0 VOUT |
| Junction Temp Range | −40°C to +125°C - qualified for enterprise-class thermal environments without derating up to full load |
| Package Thermal RθJA | 30°C/W - requires minimal PCB copper area for thermal management in dense server board layouts |
Pinout & Package
PQFN 5 mm × 6 mm, 17-pin, exposed thermal pad (PGnd-connected), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Fb | Inverting feedback input | Directly connects to output voltage divider; sets regulated VOUT with 0.6 V reference |
| 3 Comp | Error amplifier output | Interface for external Type II/III compensation network between Fb and Comp |
| 5 Rt | Frequency set input | Resistor-to-GND selects fSW from 300 kHz to 1.2 MHz with ±10% tolerance |
| 6 ILIM | Current limit configuration | Strapping options (float/Vcc/PGnd) select 12 A / 16 A / 20 A OCP thresholds |
| 7 PGood | Open-drain power-good status | Asserts after soft-start and VOUT regulation; requires external pull-up ≤ Vcc |
| 8 Vsns | OVP and PGood sense input | Monitors output rail independently for fast over-voltage shutdown and accurate PGood assertion |
| 9 Vin | LDO input supply | Bias source for internal 5 V LDO; short to Vcc/LDO_Out if external bias used |
| 10 Vcc/LDO_Out | LDO output / external bias input | Supplies gate drivers; accepts external 4.5–7.5 V supply to bypass internal LDO |
| 11 PGnd | Power ground return | Low-impedance return path for high-side/low-side MOSFETs; must connect to power plane under thermal pad |
| 12 SW | Switch node | Connects to output inductor; carries full AC ripple current and high dI/dt transients |
| 13 PVin | Main power stage input | High-current input for MOSFET bridge; decoupled with bulk + ceramic capacitors near pin |
| 14 Boot | High-side driver supply | Boot capacitor (100 nF) between Boot and SW generates floating gate drive for top FET |
| 15 Enable | UVLO-capable enable input | Resistor divider from PVin enables input undervoltage lockout; active-high logic |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFET drivers + bootstrap diode | Eliminates external high-side gate driver IC and discrete bootstrap diode, reducing BOM count by ≥3 components |
| Thermally compensated over-current protection | Three user-selectable current limits (12/16/20 A) with automatic adjustment across −40°C to +125°C junction range |
| Enhanced pre-bias start-up | Allows safe start-up into pre-charged output capacitors without reverse current or output overshoot |
| Monotonic start-up | Guarantees output voltage ramps only upward during soft-start, preventing latch-up in downstream logic |
| Programmable power-good output | Configurable delay and threshold via Vsns feedback; open-drain output compatible with 1.8 V/3.3 V/5 V logic families |
Applications
| Server VR12/VR13 Core Power | Telecom Line Card POL |
|---|---|
Use Scenario: 12 V intermediate bus powering multi-core Xeon processors requiring dynamic voltage scaling from 0.7 V to 1.3 V. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering up to 16 A with feed-forward line regulation and monotonic ramp. Use Value: Integrated drivers and MOSFETs reduce layout area by 40% vs. controller+discrete solution; 0.6 V ±0.6% reference ensures tight core voltage compliance. | Use Scenario: Distributed 3.3 V or 5 V supply on carrier-grade line cards with strict thermal and reliability requirements. IC Role / Device Role / Timing Role: High-efficiency POL regulator with programmable PGood and thermal shutdown for hot-swap compatibility. Use Value: Three ILIM settings allow precise current limiting per card slot; PQFN 5×6 mm footprint fits constrained front-panel PCB real estate. |
| Enterprise SSD Power Rail | Network Switch ASIC Supply |
Use Scenario: 1.8 V or 3.3 V power for NVMe controller and NAND flash in high-density U.2/U.3 SSD modules. IC Role / Device Role / Timing Role: Secondary POL regulator with pre-bias start-up to avoid backfeed into powered-down flash arrays. Use Value: Enhanced pre-bias capability prevents reverse current flow during hot-plug events; 125°C TJ rating supports sealed enclosure operation. | Use Scenario: 0.85 V core supply for 100G Ethernet switch ASICs with rapid load transients up to 10 A/µs. IC Role / Device Role / Timing Role: Fast-response buck regulator using feed-forward compensation to maintain <±1% load regulation at 16 A step. Use Value: Feed-forward architecture reduces output deviation during 10 A load steps by 35% vs. standard voltage-mode control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8765GQ-Z (Monolithic Power) | 16 A rated, but uses external bootstrap capacitor; no integrated bootstrap diode; 0.5% reference accuracy | Lacks pre-bias start-up and monotonic ramp; requires external UVLO circuitry | Preferred when lower BOM cost outweighs layout simplicity and robustness in non-critical systems |
| TPS53689T (Texas Instruments) | 16 A, dual-phase capable, supports D-CAP3 control; higher pin count (32-QFN); no integrated bootstrap diode | Requires external gate drivers and phase-interleaving support components; optimized for multi-phase scalability | Chosen for multi-phase designs needing >16 A or tighter transient response with D-CAP3 loop dynamics |
Compared with MP8765GQ-Z and TPS53689T, IR3829MTRPBF uniquely integrates the bootstrap diode and supports monotonic/pre-bias start-up out-of-box-reducing design validation effort for single-phase, space-constrained enterprise POLs.
Availability
IR3829MTRPBF is available at Aetrix Electronics and suitable for server VR12/VR13 core power, telecom line card POL, and enterprise SSD power rail applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for IR3829MTRPBF 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 leadership in silicon and silicon carbide power devices.
The SupIRBuck® product line delivers highly integrated DC/DC regulators targeting enterprise infrastructure applications where board space, thermal performance, and system-level reliability are critical constraints.
FAQ
What is the minimum output voltage supported by IR3829MTRPBF?
The IR3829MTRPBF supports a minimum output voltage of 0.6 V ±0.6%, set by its internal precision reference. This value is fixed and not adjustable below 0.6 V. The feedback divider ratio determines actual VOUT, and operation below 0.6 V violates the error amplifier's common-mode input range and invalidates regulation accuracy.
Can IR3829MTRPBF operate without an external Vcc supply?
Yes. The IR3829MTRPBF includes an internal LDO that generates Vcc from PVin when PVin ≥7.5 V. Below 7.5 V, the LDO enters dropout; for reliable operation across 1.0 V–21 V input, an external 4.5–7.5 V bias applied to Vcc/LDO_Out is required, and Vin must be shorted to Vcc/LDO_Out in that configuration.
How is the switching frequency set on IR3829MTRPBF?
Switching frequency is set by connecting an external resistor between the Rt pin and Gnd. A 100 kΩ resistor yields ~600 kHz; values from 30 kΩ to 200 kΩ produce 1.2 MHz to 300 kHz respectively. The relationship is linear and specified in the datasheet's Rt vs. fSW graph, with ±10% tolerance over temperature and process variation.
What thermal management is required for 16 A continuous operation?
At 16 A, 12 VIN→1.0 VOUT, the IR3829MTRPBF dissipates ~3.3 W. With θJA = 30°C/W, ambient must stay ≤75°C for TJ ≤125°C. A 4-layer PCB with ≥2 oz copper, thermal vias under the exposed PGnd pad, and ≥2 in² copper pour reduces θJA to ~20°C/W, enabling full load in 85°C ambient.
IR3829MTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
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- Output Type:
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- Number of Outputs:
- -
- Voltage - Input (Min):
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- Voltage - Input (Max):
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- Voltage - Output (Min/Fixed):
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- Voltage - Output (Max):
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- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
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- Mounting Type:
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- Supplier Device Package:
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IR3829MTRPBF FAQ
1.How can I place an order for IR3829MTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3829MTRPBF 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 IR3829MTRPBF reliable?
The price and inventory of IR3829MTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3829MTRPBF is usually 5 days.
3.What payment methods are accepted for IR3829MTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3829MTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3829MTRPBF?
IR3829MTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3829MTRPBF 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 IR3829MTRPBF?
For technical support, including IR3829MTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3829MTRPBF requirements.
6.How does Aetrix verify that IR3829MTRPBF is sourced from the original manufacturer or authorized distributors?
All IR3829MTRPBF 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 IR3829MTRPBF meets industry standards.
7.What is the process for return or replacement of IR3829MTRPBF?
All IR3829MTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3829MTRPBF, 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 IR3829MTRPBF part is unused and in its original packaging.
Return procedure for IR3829MTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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