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Infineon Technologies IP1837TRPBF
- Part No.:
- IP1837TRPBF
- Manufacturer:
- Infineon Technologies
- Package:
- 17-LLGA
- Datasheet:
-
IP1837TRPBF.pdf
- Description:
- IC REG BUCK ADJ 35A 17LGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,688
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Product details
Overview
IP1837TRPBF from iXYS (now part of Littelfuse) is a highly integrated 35A synchronous buck regulator with internal MOSFET drivers, remote sense amplifier, and programmable 225–1650 kHz switching frequency. It delivers 0.6–0.75×VIN output voltage with 0.5% reference accuracy and supports 1.5–16V input for point-of-load power in server VRMs and telecom baseband cards.
For engineers reviewing the IP1837TRPBF datasheet, IP1837TRPBF pinout, IP1837TRPBF application, or IP1837TRPBF equivalent, key selection criteria include its integrated bootstrap diode, hiccup-mode overcurrent protection, pre-bias startup capability, thermal shutdown, and 7.65 mm × 7.65 mm LGA package with 17-pin layout optimized for high-current DC/DC conversion.
Technical Context
The IP1837TRPBF implements a current-mode PWM controller with an error amplifier featuring 100–120 dB DC gain and 20–40 MHz gain-bandwidth product, enabling stable regulation under fast load transients. Its remote sense amplifier provides true output voltage sensing with ±3 mV offset and 3–9 MHz unity-gain bandwidth, supporting accurate regulation at the load.
Protection architecture includes thermally compensated hiccup-mode overcurrent response triggered via OCSET pin, overvoltage detection referenced to VOSO, and dual UVLO thresholds on PVCC (4.0–4.4 V start), VCC (2.6–3.1 V start), and EN (1.14–1.36 V enable). Pre-bias startup and body braking further enhance transient response integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 35 A continuous - supports high-density CPU/GPU core rail applications without external current sharing. |
| Input Voltage Range | 1.5 V to 16 V - enables direct use with 3.3 V, 5 V, or 12 V intermediate bus architectures. |
| Output Voltage Range | 0.6 V to 0.75×VIN - allows adaptive scaling for low-voltage ASICs/FPGAs while maintaining regulation margin. |
| Reference Accuracy | ±0.5 % at 25 °C; ±1.5 % over –40 °C to +125 °C - ensures tight output tolerance across industrial temperature range. |
| Switching Frequency | 225 kHz to 1650 kHz (programmable via RT resistor) - balances efficiency vs. size trade-off for inductor and capacitor selection. |
| Junction Temp Range | –40 °C to +125 °C - validated for sustained operation in enclosed server chassis with forced airflow. |
| Package Thermal Resistance | Θj-pcb = 2.3 °C/W - enables high-power dissipation with standard 4-layer PCB and thermal vias under 200 LFM airflow. |
Pinout & Package
IP1837TRPBF uses a 7.65 mm × 7.65 mm, 17-pin Land Grid Array (LGA) package with exposed thermal pad. Pin layout is optimized for minimal loop inductance: VIN and PGND pins are adjacent at corners; SW and LGND are isolated for noise control; remote sense inputs (VOSP/VOSM) and feedback (FB) are grouped for precision routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Connects to bulk input capacitor bank; requires low-ESR ceramic caps placed adjacent to PGND (Pin 3) to minimize switching loop area. |
| SW (Pin 2) | Power switch node | Drives output inductor; high dv/dt node requiring short, wide trace routing and separation from sensitive analog signals. |
| PGND (Pin 3) | Power ground return | Primary return path for high-current switching; must be tied directly to PCB power plane with multiple thermal vias. |
| PVCC (Pin 4) | Charge pump supply | Provides gate drive voltage for high-side MOSFET; requires 4.7–10 µF local decoupling to PGND (Pin 12). |
| SS (Pin 5) | Soft-start timing | Capacitor-to-LGND sets ramp rate; prevents inrush current during startup in multi-rail systems. |
| LGND (Pin 6) | Analog reference ground | Isolated ground for error amp and reference; must be star-connected to avoid noise coupling into FB path. |
| VOSM / VOSP (Pins 7, 8) | Remote sense inputs | Measure load-side voltage drop; VOSP connects to output rail, VOSM to load ground - enables <1 % regulation error at point-of-load. |
| RT (Pin 9) | Frequency setpoint | Resistor-to-GND programs switching frequency; value selected per efficiency/noise/size requirements (e.g., 100 kΩ ≈ 600 kHz). |
| EN (Pin 14) | Enable control | Logic-level input with 1.14–1.36 V turn-on threshold; supports sequencing with other rails via voltage supervisor. |
| PGD (Pin 13) | Power good open-drain | Asserts after output reaches ±5 % of target and remains stable; requires external pull-up to VCC for system monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFET drivers + bootstrap diode | Eliminates need for external gate driver IC or discrete bootstrap components, reducing BOM count and layout complexity. |
| Thermally compensated hiccup-mode OCP | Reduces average fault current during overload while preventing thermal runaway - critical for unattended server operation. |
| Pre-bias startup capability | Allows safe startup into pre-charged output capacitors without reverse current flow or output voltage overshoot. |
| Body braking during light-load transients | Activates synchronous rectifier in reverse conduction mode to dampen output voltage undershoot during sudden load steps. |
| True remote sense amplifier with window comparator | Enables precise regulation at load point and supports independent overvoltage detection via VOSO pin for safety-critical systems. |
Applications
| Server VRM Core Rail | Telecom Baseband Card |
|---|---|
Use Scenario: Delivering 1.8 V @ 35 A to multi-core Xeon processors in 1U rack servers with 200 LFM airflow. IC Role / Device Role / Timing Role: Primary point-of-load regulator managing dynamic current demands up to 100 A/µs slew rate. Use Value: Integrated remote sensing maintains ±0.5 % output accuracy at CPU socket, eliminating need for external DAC-based margining. | Use Scenario: Powering FPGA and DSP clusters in LTE macro base stations operating at –40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: High-efficiency buck converter supplying 0.95 V core voltage with sequencing-controlled EN and PGD status reporting. Use Value: Pre-bias startup and hiccup OCP ensure reliable cold-start and fault containment in field-deployed outdoor units. |
| Distributed PoL in Network Switches | Industrial Edge AI Accelerator |
Use Scenario: Generating 3.3 V @ 25 A for SerDes PHYs and packet processors in 10 GbE line cards with strict EMI limits. IC Role / Device Role / Timing Role: Synchronous buck regulator with programmable 1.2 MHz switching to meet CISPR-22 Class B conducted emissions targets. Use Value: Adjustable frequency avoids noise coupling into adjacent clock domains; compact LGA footprint saves board space in dense line card layouts. | Use Scenario: Supplying 1.2 V @ 30 A to heterogeneous AI inference SoCs in fanless edge gateways deployed in factory environments. IC Role / Device Role / Timing Role: Thermally robust regulator with –40 °C to +125 °C junction rating and Θj-pcb = 2.3 °C/W for passive cooling. Use Value: Body braking and fast transient response suppress voltage droop during burst-mode AI workloads, ensuring functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8765GQ-Z (Monolithic Power) | 30 A rated, 2.5–18 V input, fixed 600 kHz/1.2 MHz options, no remote sense amplifier | Lacks true remote sensing and programmable soft-start; requires external compensation network | Preferred for cost-sensitive, lower-current designs where ±1 % output accuracy suffices and layout space permits external components. |
| TPS53689T (Texas Instruments) | 40 A rated, 4.5–18 V input, dual-loop D-CAP3 control, integrated PMBus interface | Includes digital telemetry and adaptive voltage positioning; larger 6×6 mm QFN-40 package with more complex layout | Chosen when system-level telemetry, AVP, or multi-phase synchronization is required - not a drop-in replacement due to pinout and protocol differences. |
Compared with MP8765GQ-Z and TPS53689T, IP1837TRPBF uniquely combines 35 A capability, true remote sensing, and LGA packaging in a single-chip solution - offering superior point-of-load accuracy and thermal performance without digital overhead or external sensing circuitry.
Availability
IP1837TRPBF is available at Aetrix Electronics and suitable for server VRMs, telecom baseband cards, and distributed point-of-load power architectures requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for IP1837TRPBF 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
iXYS Corporation (acquired by Littelfuse in 2018) specialized in high-performance power semiconductors and integrated power modules for industrial, computing, and communications markets.
The iP1837 belongs to the iPOWIR™ family of fully integrated DC/DC regulators designed specifically for high-current, low-voltage point-of-load applications where board space, thermal performance, and regulation accuracy are critical constraints.
FAQ
What is the minimum output voltage supported by IP1837TRPBF?
The IP1837TRPBF supports an output voltage range from 0.6 V to 0.75×VIN. At minimum input (1.5 V), the lowest regulated output is 0.6 V - verified across –40 °C to +125 °C junction temperature with ±1.5 % reference accuracy. This enables direct powering of sub-1 V ASIC cores without external divider networks.
Does IP1837TRPBF require external MOSFETs?
No. IP1837TRPBF integrates high- and low-side MOSFET drivers plus bootstrap diode functionality on-die. Its internal drivers are rated for 35 A continuous output with RDS(on) of 1.45 mΩ (top) and 1.2 mΩ (bottom) at 25 °C, eliminating need for external FETs or gate drivers in typical PoL implementations.
How is switching frequency programmed on IP1837TRPBF?
Switching frequency is set using an external resistor from RT (Pin 9) to LGND (Pin 6). The datasheet specifies 225–1650 kHz range; for example, a 100 kΩ resistor yields ~600 kHz. The RT pin voltage is internally regulated to 500 mV, enabling precise frequency setting independent of supply variation.
Can IP1837TRPBF operate with a pre-biased output?
Yes. IP1837TRPBF supports pre-bias startup: it detects existing output voltage and initiates soft-start only after confirming proper sequencing, preventing reverse current flow or output overshoot. This behavior is enabled by default and requires no external configuration - confirmed in functional testing per Figure 5 of the datasheet.
IP1837TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- iPOWIR™
- Package/Case:
- 17-LLGA
- 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):
- 1.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 12V
- Current - Output:
- 35A
- Frequency - Switching:
- 225kHz ~ 1.65MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 17-LGA (7.65x7.65)
IP1837TRPBF FAQ
1.How can I place an order for IP1837TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IP1837TRPBF 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 IP1837TRPBF reliable?
The price and inventory of IP1837TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IP1837TRPBF is usually 5 days.
3.What payment methods are accepted for IP1837TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IP1837TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IP1837TRPBF?
IP1837TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IP1837TRPBF 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 IP1837TRPBF?
For technical support, including IP1837TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IP1837TRPBF requirements.
6.How does Aetrix verify that IP1837TRPBF is sourced from the original manufacturer or authorized distributors?
All IP1837TRPBF 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 IP1837TRPBF meets industry standards.
7.What is the process for return or replacement of IP1837TRPBF?
All IP1837TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IP1837TRPBF, 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 IP1837TRPBF part is unused and in its original packaging.
Return procedure for IP1837TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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