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Infineon Technologies IR3895MTR1PBF
- Part No.:
- IR3895MTR1PBF
- Manufacturer:
- Infineon Technologies
- Package:
- 16-PowerVQFN
- Datasheet:
-
IR3895MTR1PBF.pdf
- Description:
- IC REG BUCK ADJ 16A 16POWERQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,405
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Product details
Overview
IR3895MTR1PBF from Infineon Technologies is a 16A synchronous buck regulator with integrated high- and low-side MOSFETs, internal LDO, bootstrap diode, and PWM controller. It operates from 1.0V–21V input, delivers 0.5V–0.86×Vin output, supports up to 1.5MHz switching frequency, and features programmable power good, thermal shutdown, and pre-bias startup. Used in server point-of-load power delivery.
For engineers reviewing the IR3895MTR1PBF datasheet, IR3895MTR1PBF pinout, IR3895MTR1PBF application, or IR3895MTR1PBF equivalent, key selection criteria include its 16A continuous output current, thermally compensated hiccup-mode overcurrent protection, ±16A Vp tracking capability, monotonic start-up, and 5mm × 6mm PQFN package with 17-pin layout.
Technical Context
The IR3895 implements a voltage-mode PWM control architecture with feed-forward line regulation and an error amplifier featuring 100–120 dB DC gain, 20–40 MHz GBWP, and 7–20 V/µs slew rate. Its oscillator supports resistor-programmed (300–1500 kHz) or external synchronization (270–1650 kHz) with smooth clocking.
It integrates dual MOSFET drivers, a smart internal LDO (6.0–6.7 V output at 50 mA), and precision 0.5 V ±0.5% reference with margining (0.4–1.2 V). Protection includes UVLO on Vcc (4.0–4.4 V trip), enable pin threshold (1.14–1.26 V), and Vp-based tracking with ±0.1 V hysteresis and 1.28 ms delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 16 A continuous - supports high-density server and telecom POL rails without external current sense or driver stages. |
| Input Voltage Range | 1.0 V to 21 V - enables single-rail operation from 5 V or wide-range inputs including 12 V and 19 V systems. |
| Switching Frequency | 300 kHz to 1.5 MHz - adjustable via Rt resistor or external sync signal for EMI optimization and inductor size reduction. |
| Reference Accuracy | ±0.5% (0°C–70°C), ±1.0% (−40°C–125°C) - ensures tight output voltage tolerance across industrial temperature range. |
| Package | 5 mm × 6 mm PQFN, 17-pin - thermally enhanced layout with separated PGnd and Gnd pins for noise isolation and efficient PCB thermal management. |
| Vp Tracking Range | ±16 A sink/source capability - allows precise sequencing and voltage tracking of multiple rails using external reference signals. |
| Soft-Start Ramp Rate | 0.16–0.24 mV/µs (start), −0.24 to −0.16 mV/µs (stop) - enables controlled monotonic ramp-up/down without output overshoot or undershoot. |
Pinout & Package
IR3895MTR1PBF uses a 5 mm × 6 mm Power QFN (PQFN) package with exposed thermal pad and 17 terminals. Pin numbering follows top-view layout with dedicated PGnd (Pin 11) and Gnd (Pins 4, 17) separation for optimal noise immunity and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Fb | Inverting feedback input | Connects to output divider to set regulated voltage; high-impedance node requiring stable RC compensation network at Comp pin. |
| 5 Rt/Sync | Frequency programming/synchronization | Resistor-to-GND sets free-running frequency; AC-coupled external clock synchronizes switching with system timing. |
| 6 S_Ctrl | Soft-start/soft-stop control | Logic-high initiates internal soft-start; logic-low enables controlled output discharge - critical for hot-swap and rail sequencing. |
| 7 PGood | Open-drain power-good status | Signals valid output after regulation; supports tracking mode with programmable upper/lower thresholds (80–125% of reference). |
| 15 Enable | Input enable with UVLO | 1.14–1.26 V threshold enables turn-on; resistor-divider from PVin adds input undervoltage lockout functionality. |
| 16 Vp | Tracking reference input | Accepts external voltage for rail tracking; supports ±16 A sourcing/sinking during sequencing - enables multi-rail coordination without external op-amps. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFET drivers + bootstrap diode | Eliminates external gate drive components and discrete bootstrap diode, reducing BOM count and layout area by ~30%. |
| Smart internal LDO (6.4 V typical) | Improves light-load efficiency by powering control circuitry independently; maintains regulation down to Vin = 6.8 V before dropout. |
| Thermally compensated hiccup-mode OCP | Adjusts current limit vs. junction temperature to prevent false trips during transient load surges while ensuring robust fault protection. |
| Enhanced pre-bias start-up | Allows safe start-up into pre-charged output capacitors without reverse current flow or uncontrolled inrush - essential for redundant power systems. |
| Precision 0.5 V reference with margining | Enables ±10% output voltage margining (0.4–1.2 V) for production testing and dynamic voltage scaling in CPU/GPU applications. |
Applications
| Server Point-of-Load | Telecom Line Cards |
|---|---|
Use Scenario: Delivering 1.2 V @ 16 A to high-performance CPUs in 1U rack servers with strict thermal and space constraints. IC Role / Device Role / Timing Role: Primary POL regulator with integrated power stage, providing tightly regulated core voltage with fast transient response. Use Value: Eliminates need for external drivers and discrete MOSFETs, reducing solution size by >40% versus controller+discrete-FET designs. | Use Scenario: Powering FPGA, DSP, and SerDes on carrier-grade line cards requiring rail sequencing and voltage tracking. IC Role / Device Role / Timing Role: Sequencing-capable buck regulator supporting Vp-based tracking of multiple rails with ±16 A sink/source capability. Use Value: Enables precise multi-rail coordination (e.g., 1.8 V I/O followed by 1.0 V core) without external tracking ICs or op-amps. |
| Storage Controller Boards | Embedded Networking Equipment |
Use Scenario: Supplying 3.3 V and 1.8 V rails to NVMe SSD controllers and PCIe switches in enterprise storage enclosures. IC Role / Device Role / Timing Role: Dual-rail POL solution leveraging programmable PGood and Vref margining for functional safety validation. Use Value: Built-in 0.5 V ±0.5% reference and margining support simplifies ATE test coverage for voltage compliance across temperature. | Use Scenario: Powering packet processors and PHYs in fanless edge routers operating at −40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-efficiency buck regulator with −40°C to 125°C junction rating and thermally compensated OCP. Use Value: Maintains stable regulation and protection behavior across full industrial temperature range without derating. |
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) | 12 A rated, 2.5–18 V input, fixed 600 kHz fsw, no Vp tracking or margining | Lacks rail sequencing support and ±16 A tracking sink/source; suited for simpler single-rail loads | Select when cost sensitivity outweighs sequencing needs and output current ≤12 A |
| TPS546D24RUTR (Texas Instruments) | 20 A rated, 3–18 V input, PMBus interface, digital loop compensation, no integrated bootstrap diode | Requires external bootstrap diode and offers telemetry via PMBus but lacks analog Vp tracking capability | Select when digital monitoring, programmability, and higher current are prioritized over analog tracking simplicity |
Compared with MP8765GQ-Z and TPS546D24RUTR, IR3895MTR1PBF uniquely combines 16 A analog regulation, Vp-based ±16 A tracking, and integrated bootstrap diode in a compact PQFN - making it optimal for analog-sequenced, space-constrained POL where digital interfaces add unnecessary complexity.
Availability
IR3895MTR1PBF is available at Aetrix Electronics and suitable for server point-of-load, telecom line card, and embedded networking applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for IR3895MTR1PBF 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 GaN-based power solutions.
The SupIRBuck™ product line delivers highly integrated DC/DC regulators targeting high-current, space-constrained point-of-load applications in datacenter, telecom, and storage infrastructure - emphasizing integration, thermal robustness, and analog sequencing capability.
FAQ
What is the maximum supported switching frequency and how is it configured?
The IR3895MTR1PBF supports up to 1.5 MHz switching frequency. It is configured either by connecting an external resistor between the Rt/Sync pin and GND (e.g., 15.0 kΩ yields 1.5 MHz typical), or by applying an external clock signal through a diode to the same pin for synchronization. The device maintains smooth clocking during sync transitions to avoid jitter or phase discontinuity.
Does IR3895MTR1PBF require external MOSFETs or gate drivers?
No. IR3895MTR1PBF integrates high-side and low-side power MOSFETs, MOSFET gate drivers, and a bootstrap diode within the 5 mm × 6 mm PQFN package. This eliminates the need for external power switches, driver ICs, or discrete bootstrap diodes - reducing total solution footprint and component count significantly.
How does the Vp pin enable voltage tracking and what is its current capability?
The Vp pin accepts an external reference voltage to coordinate output voltage with another rail. It supports ±16 A sourcing and sinking capability during tracking mode, enabling direct connection to other regulators' feedback nodes without external amplifiers. This allows precise sequencing (e.g., I/O before core) and dynamic tracking across load transients.
What thermal and protection features ensure reliability in high-power applications?
IR3895MTR1PBF includes thermally compensated hiccup-mode overcurrent protection, −40°C to 125°C junction-rated operation, thermal shutdown, under-voltage lockout on Vcc and Enable pins, and enhanced pre-bias start-up. Its separated PGnd and Gnd pins minimize noise coupling, while the exposed thermal pad enables efficient heat dissipation in high-current (>10 A) deployments.
IR3895MTR1PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SupIRBuck®
- Package/Case:
- 16-PowerVQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1V
- Voltage - Input (Max):
- 21V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 18.06V
- Current - Output:
- 16A
- Frequency - Switching:
- 300kHz ~ 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-PowerQFN
IR3895MTR1PBF FAQ
1.How can I place an order for IR3895MTR1PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR3895MTR1PBF 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 IR3895MTR1PBF reliable?
The price and inventory of IR3895MTR1PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR3895MTR1PBF is usually 5 days.
3.What payment methods are accepted for IR3895MTR1PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR3895MTR1PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR3895MTR1PBF?
IR3895MTR1PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR3895MTR1PBF 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 IR3895MTR1PBF?
For technical support, including IR3895MTR1PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR3895MTR1PBF requirements.
6.How does Aetrix verify that IR3895MTR1PBF is sourced from the original manufacturer or authorized distributors?
All IR3895MTR1PBF 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 IR3895MTR1PBF meets industry standards.
7.What is the process for return or replacement of IR3895MTR1PBF?
All IR3895MTR1PBF units undergo pre-shipment inspection (PSI). If there is an issue with IR3895MTR1PBF, 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 IR3895MTR1PBF part is unused and in its original packaging.
Return procedure for IR3895MTR1PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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