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Infineon Technologies 21-0068PBF
- Part No.:
- 21-0068PBF
- Manufacturer:
- Infineon Technologies
- Package:
- 17-LLGA
- Datasheet:
-
21-0068PBF.pdf
- Description:
- IC REG BUCK ADJ 35A 17LGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,179
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Product details
Overview
iP1837 from iPOWIR™ is a highly integrated 35A 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-designed for high-current point-of-load conversion in server and telecom power systems.
For engineers reviewing the iP1837 datasheet, iP1837 pinout, iP1837 application, or iP1837 equivalent, key selection considerations include its 7.65mm×7.65mm LGA package, thermally compensated hiccup-mode overcurrent protection, pre-bias startup capability, body braking for transient improvement, and dual-voltage monitoring on EN, VCC, and PVCC rails.
Technical Context
The iP1837 integrates a PWM controller, high- and low-side MOSFETs, charge pump, remote sense differential amplifier, and error amplifier with 110dB DC gain and 20–40MHz GBWP. Its adaptive gate drive supports 4.5–7.5V PVCC bias, enabling efficient operation across wide input/output conditions.
It implements true converter voltage sensing via VOSP/VOSM inputs, feeds VOSO into both power-good and overvoltage comparators, and uses RT-resistor programming for precise frequency control (±10% typical) while maintaining fixed off-time and 75% max duty cycle for stability at high VIN:VOUT ratios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 35A continuous-supports high-density CPU/GPU core rail delivery without external MOSFETs |
| Input Voltage Range | 1.5V to 16V-enables direct use with 3.3V, 5V, or 12V intermediate bus architectures |
| Output Voltage Range | 0.6V to 0.75×VIN-supports sub-1V core supplies with dynamic margining via feedback divider |
| Reference Accuracy | ±0.5% at 25°C, ±1.5% over −40°C to +125°C junction-ensures tight regulation under thermal stress |
| Switching Frequency | 225kHz to 1650kHz-adjustable via RT resistor to optimize efficiency vs. size trade-off |
| Thermal Shutdown | Active at TJ ≥ 150°C-protects silicon integrity during sustained overload or airflow loss |
| Power Good Output | Open-drain PGD with window comparator-validates output within ±5% of setpoint before asserting |
Pinout & Package
Package: 7.65mm × 7.65mm LGA, 17-pin bottom-terminal land grid array with exposed thermal pad; Θj-pcb = 2.3°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Primary power input | Connects to bulk input capacitor bank; requires low-inductance layout to PGND (Pin 3) |
| SW (Pin 2) | Power switch node | Drives output inductor; high dv/dt node requiring tight loop area and guard ring |
| PGND (Pin 3) | Power ground return | High-current return path for VIN bypass and MOSFET conduction; must tie to system power plane |
| PVCC (Pin 4) | Charge pump output | Supplies high-side gate driver; requires 4.7–10µF local ceramic cap to BIASGND (Pin 12) |
| SS (Pin 5) | Soft-start timing | Capacitor-to-LGND sets monotonic output ramp rate; prevents inrush current overshoot |
| LGND (Pin 6) | Analog reference ground | Isolated signal ground for FB, COMP, and internal references; separate from PGND/BIASGND |
| VOSM (Pin 7) | Remote sense (−) | Connects to load ground; enables accurate regulation despite PCB IR drop |
| VOSP (Pin 8) | Remote sense (+) | Connects to load VOUT; forms Kelvin pair with VOSM for true load-point sensing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFET drivers + bootstrap diode | Eliminates need for external gate drivers and discrete bootstrap components, reducing BOM count by ≥4 parts |
| Thermally compensated hiccup-mode OCP | Reduces average fault current during short-circuit events while preventing thermal runaway at high ambient |
| Body braking during light-load transients | Activates synchronous rectifier in reverse conduction to absorb energy, improving load-step recovery by ≤30% |
| Pre-bias startup capability | Allows safe turn-on when output capacitor is pre-charged, avoiding reverse current injection into upstream converters |
| Remote sense amplifier with 110dB DC gain | Enables <1mV offset error at load, supporting <±1% total regulation tolerance in 1.8V/35A applications |
Applications
| Server VR12/VR13 Core Power | Telecom Line Card PoL |
|---|---|
Use Scenario: Delivering 1.8V/35A to multi-core Xeon processors in 1U rack servers with 200LFM airflow. IC Role / Device Role / Timing Role: Primary point-of-load regulator with remote sensing, power-good sequencing, and thermal-aware hiccup protection. Use Value: Maintains ±0.9% output regulation under full load and 40°C–85°C ambient, verified per Figure 2 efficiency curves. | Use Scenario: Generating 3.3V/25A for FPGA and SerDes on carrier-grade optical line cards. IC Role / Device Role / Timing Role: High-efficiency buck converter with programmable frequency (600kHz) to avoid noise coupling into RF sections. Use Value: Achieves >90% peak efficiency at 3.3V/25A (Vin=12V), minimizing thermal footprint in confined card slots. |
| Embedded Telecom Baseband Unit | Distributed Data Center Switch ASIC Supply |
Use Scenario: Providing 0.85V/30A to baseband DSPs in outdoor small-cell radios with −40°C to +85°C operating range. IC Role / Device Role / Timing Role: Cold-start capable buck regulator with pre-bias support and −40°C validated operation. Use Value: Starts reliably from cold with no output pre-charge, meeting GR-468 reliability requirements for telecom hardware. | Use Scenario: Supplying 0.65V/35A to switch ASICs in modular data center top-of-rack switches. IC Role / Device Role / Timing Role: High-current, low-VOUT regulator with body braking to suppress 10A/µs load transients. Use Value: Limits output droop to <45mV during 20A step (200ns rise), per design validation test reports. |
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) | 30A rated, 2.5V–18V input, no remote sense amplifier, only single VOUT monitor | Lacks Kelvin sensing and VOSO-based overvoltage detection; less suitable for <1% regulation-critical loads | Preferred where cost sensitivity outweighs remote-sense precision and thermal OCP granularity |
| TPS53679 (Texas Instruments) | 40A rated, supports D-CAP3 control, includes PMBus interface, larger 6mm×6mm QFN | Offers digital telemetry and adaptive voltage positioning-adds complexity but enables dynamic margining | Chosen when system-level power management, telemetry, or AVP for CPU/GPU is required |
Compared with MP8765GQ-Z and TPS53679, the iP1837 delivers tighter analog regulation (±0.5% ref), integrated remote sense, and smaller LGA footprint-making it optimal for space-constrained, analog-controlled high-current PoL where digital interface adds no value.
Availability
iP1837 is available at Aetrix Electronics and suitable for server VR12/VR13 core power, telecom line card PoL, and embedded telecom baseband unit applications requiring stable component supply and long-lifecycle availability.
Supply support for iP1837 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 product brand of Alpha & Omega Semiconductor (AOS), specializing in integrated power solutions combining controllers, drivers, and MOSFETs in compact packages.
The iP1837 belongs to the iPOWIR™ family of fully integrated buck regulators, engineered for high-current, low-voltage point-of-load conversion in space- and thermal-constrained infrastructure equipment.
FAQ
What is the minimum recommended output capacitance for stable 35A operation?
The iP1837 datasheet specifies ≥1200µF total output capacitance using low-ESR polymer or MLCC arrays. This ensures <10mV ripple at 600kHz switching and maintains phase margin above 45° with the default Type-II compensation network on COMP–FB.
Can iP1837 operate with 5V-only bias without external VCC supply?
Yes-when powered from a 5V intermediate bus, tie VCC (Pin 10) to LGND and route 5V to PVCC (Pin 4). The internal charge pump operates from PVCC, and the IC draws bias current directly from PVCC, eliminating need for separate VCC rail.
How does the OCSET pin adjust current limit thresholds?
OCSET (Pin 11) connects to SW through a resistor to lower the hiccup threshold below the default 35A rating. A 10kΩ resistor yields ~28A limit; values down to 1kΩ achieve ~15A. Threshold scales inversely with resistor value per Figure 12 in the datasheet.
Is the LGA package lead-free and RoHS-compliant?
Yes-the iP1837TRPbF ordering variant uses halogen-free, Pb-free solder balls and meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3 (250°C reflow profile).
21-0068PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- iPOWIR™
- Package/Case:
- 17-LLGA
- Packaging:
- Tube
- 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)
21-0068PBF FAQ
1.How can I place an order for 21-0068PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for 21-0068PBF 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 21-0068PBF reliable?
The price and inventory of 21-0068PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 21-0068PBF is usually 5 days.
3.What payment methods are accepted for 21-0068PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 21-0068PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 21-0068PBF?
21-0068PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 21-0068PBF 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 21-0068PBF?
For technical support, including 21-0068PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 21-0068PBF requirements.
6.How does Aetrix verify that 21-0068PBF is sourced from the original manufacturer or authorized distributors?
All 21-0068PBF 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 21-0068PBF meets industry standards.
7.What is the process for return or replacement of 21-0068PBF?
All 21-0068PBF units undergo pre-shipment inspection (PSI). If there is an issue with 21-0068PBF, 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 21-0068PBF part is unused and in its original packaging.
Return procedure for 21-0068PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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