Infineon Technologies IP1827TRPBF

Overview

IP1827TRPBF from iPOWIR is a highly integrated 25A synchronous buck regulator with integrated MOSFET drivers and bootstrap diode, operating from 1.5V–16V input to deliver 0.6V–0.75×Vin output. It features 0.5% reference accuracy, programmable 225–1650kHz switching frequency, remote sense amplifier, and power-good output with window comparator - deployed in server point-of-load (PoL) converters delivering 1.8V/25A from 12V rail.

For engineers reviewing the IP1827TRPBF datasheet, IP1827TRPBF pinout, IP1827TRPBF application, or IP1827TRPBF equivalent, key selection criteria include its thermally compensated hiccup-mode OCP, pre-bias startup capability, body braking for transient response, and LGA-17 package thermal resistance (θ_j-pcb = 2.3°C/W).

Technical Context

The IP1827TRPBF implements a voltage-mode PWM controller with internal 0.6V reference and error amplifier featuring 100–120dB DC gain, 20–40MHz GBWP, and 7–20V/µs slew rate. Its remote sense amplifier provides true load-side voltage regulation with ±3mV offset and 3–9MHz unity-gain bandwidth.

Protection architecture includes independent UVLO on VCC (2.6–3.1V start), PVCC (4.0–4.4V start), and EN (1.14–1.36V enable threshold), plus overvoltage detection via VOSO input, thermal shutdown at T_j ≥ 150°C, and programmable current limit via OCSET resistor to SW.

Key Specifications

Pinout & Package

IP1827TRPBF uses a 7.65mm × 7.65mm, 17-pin LGA (Land Grid Array) package with exposed thermal pad. Pin 1 is VIN; pins 2 (SW) and 3 (PGND) form the high-current power loop; pins 12 (BIASGND) and 4 (PVCC) define the gate drive return path; pins 7 (VOSM) and 8 (VOSP) are differential remote sense inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL9120IRAJZ-T7A and TPS53679RSAT, IP1827TRPBF uniquely balances 25A capability, wide 1.5–16V input, integrated remote sense, and body braking in a single LGA package - making it optimal for high-reliability, thermally constrained PoL designs without digital control overhead.

Availability

IP1827TRPBF is available at Aetrix Electronics and suitable for server power delivery, telecom line card PoL, industrial PLC main rails, and network switch ASIC supplies requiring stable component supply and long-term lifecycle support.

Supply support for IP1827TRPBF 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

iPOWIR is a fabless semiconductor company specializing in high-efficiency, integrated power management ICs for enterprise and infrastructure applications.

The iP1827 belongs to iPOWIR's iPOWIR™ family of fully integrated buck regulators, designed specifically for high-current, low-voltage point-of-load conversion in space- and thermal-constrained server, networking, and telecom equipment.

FAQ

What is the minimum recommended output capacitance for IP1827TRPBF at 25A load?

The datasheet specifies a minimum output capacitance of 220µF using X5R/X7R ceramics (e.g., ten 22µF/0805 parts). This ensures ≤10mV output ripple at 600kHz switching and maintains loop stability with the internal error amplifier's 20–40MHz GBWP. Lower capacitance increases peak-to-peak ripple and may cause PGD assertion failure during fast load steps.

Can IP1827TRPBF operate with 5V bias instead of 3.3V VCC?

Yes - when powered from 5V bias, VCC (Pin 10) must be tied to ground and PVCC (Pin 4) supplied with 4.5–7.5V. The internal LDO is bypassed, and gate drive voltage increases to ~5V, improving R_DS(on) of both MOSFETs by ~15%. This configuration is validated for 5V intermediate bus applications and reduces conduction loss at full load.

How does the OCSET pin function, and what resistor value sets 20A current limit?

OCSET (Pin 11) connects to SW through a resistor to lower the current limit threshold. For 20A limit, a 20.5kΩ resistor is specified in the datasheet (page 5, Figure 5). This scales the internal sense voltage such that the hiccup-mode OCP triggers when inductor current reaches 20A, not the default 25A - enabling design margining for thermal derating or inductor saturation limits.

Is remote sensing mandatory, or can IP1827TRPBF operate in local feedback mode?

Remote sensing is optional. Local feedback is supported by connecting FB (Pin 17) directly to the output rail via resistor divider. However, local sensing sacrifices accuracy due to PCB trace IR drop - especially critical above 10A. The remote sense amplifier (VOSM/VOSP) is internally enabled by default but can be disabled by leaving VOSM open and tying VOSP to FB, reverting to local regulation with ±1.5% total error over temperature.