Infineon Technologies IR3837MTRPBF

Overview

IR3837MTRPBF from Infineon Technologies is a highly integrated 14A synchronous buck regulator with internal PWM controller, high- and low-side MOSFETs, bootstrap diode, and LDO. It delivers regulated output voltages from 0.6V to 0.9×Vin across 1.5–16V input, supports programmable 225–1650kHz switching, and enables pre-bias startup and margining via Vref pin for telecom and data center point-of-load applications.

For engineers reviewing the IR3837MTRPBF datasheet, IR3837MTRPBF pinout, IR3837MTRPBF application, or IR3837MTRPBF equivalent, key selection criteria include its 14A continuous load capability, ±1% feedback voltage accuracy over –40°C to +125°C, hiccup-mode overcurrent protection, power-good tracking, and 5mm×6mm PQFN package with thermal performance validated to 125°C junction temperature.

Technical Context

The IR3837MTRPBF implements a current-mode synchronous buck architecture with integrated gate drivers and an internal 5V LDO that can be bypassed for external bias. Its error amplifier features 100–120dB DC gain, 20–40MHz GBWP, and dual reference inputs (Vref and Vp) enabling precise margining and tracking functions.

Switching frequency is set by an external resistor on Rt (225–1650kHz range), while OCset configures current limit threshold via resistor-to-SW connection. Protection includes thermal shutdown at 140°C with 20°C hysteresis, UVLO on Enable (1.2V start/0.85V stop), and overvoltage detection with PGood tracking capability.

Key Specifications

Pinout & Package

IR3837MTRPBF uses a thermally enhanced 17-pin Power QFN (5mm × 6mm, 0.9 mm height) with exposed thermal pad. Pin 17 is signal ground; pins 11 and 17 are separate GND paths for power and signal integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Compared with MP2451DT-LF-Z and TPS546B24RVFT, the IR3837MTRPBF offers optimal analog simplicity for high-current PoL use: it delivers 14A without external drivers or bias supplies, includes analog margining and tracking, and maintains robustness across –40°C to +125°C without firmware dependencies.

Availability

IR3837MTRPBF is available at Aetrix Electronics and suitable for telecom line cards, data center ASIC core supplies, and distributed point-of-load power architectures requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for IR3837MTRPBF 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, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The SupIRBuck™ product line delivers fully integrated, high-current synchronous buck regulators targeting space-constrained, thermally demanding applications in networking, computing, and 5G infrastructure where analog simplicity and proven reliability outweigh digital configurability.

FAQ

What is the minimum recommended output capacitance for stable operation at 14A?

The IR3837MTRPBF datasheet specifies a minimum 220µF total output capacitance with ≤1mΩ ESR for 1.8V/14A operation. This value ensures <1% output droop during 10A/µs load transients and maintains phase margin above 45° across temperature. Ceramic + polymer hybrid configurations are recommended to balance ripple suppression and reliability.

Can the IR3837MTRPBF operate without an external bootstrap capacitor?

No. A 100nF ceramic capacitor between Boot and SW pins is mandatory to provide gate drive voltage for the high-side MOSFET. Omitting it causes immediate failure of the upper switch, resulting in no output regulation and potential damage to the SW node due to shoot-through current.

How does the Vref pin enable voltage margining, and what external components are required?

The Vref pin accepts an external 0.54–1.2V reference to shift the feedback setpoint. A 100nF capacitor to GND is required for noise immunity. When Vref = 0.66V, output increases ~10%; at 0.54V, it decreases ~10%. Margining is tracked by PGood, which asserts only when output remains within ±15% of the adjusted target.

Is the IR3837MTRPBF pin-compatible with lower-current variants like the IR3836?

Yes. The IR3837MTRPBF shares identical 17-pin 5mm×6mm PQFN footprint and pinout with IR3836 (10A) and IR3833 (6A), enabling drop-in upgrades in existing layouts. All three support identical Rt, OCset, Vref, and Sync configurations, though thermal design must be re-validated for 14A operation.