My Inquiry
My Account
Infineon Technologies IRU3037CFTRPBF
- Part No.:
- IRU3037CFTRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
IRU3037CFTRPBF.pdf
- Description:
- IC REG CTRLR BUCK/BOOST 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,654
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IRU3037CFTRPBF from Infineon Technologies is a fixed-frequency, voltage-mode synchronous PWM controller in an 8-pin TSSOP package, designed for low-cost DC-DC buck conversion in DDR memory Vtt source/sink and on-board 5V-to-1.8V/2.5V/3.3V applications. It features a 200 kHz internal oscillator, 500 mA peak gate drive, under-voltage lockout (UVLO) on Vcc (4.2 V threshold) and Vc (3.3 V threshold), programmable soft-start, and output undervoltage latch-off at 0.6 V.
For engineers reviewing the IRU3037CFTRPBF datasheet, IRU3037CFTRPBF pinout, IRU3037CFTRPBF application, or IRU3037CFTRPBF equivalent, key selection criteria include its 200 kHz switching frequency, dual N-channel MOSFET drive capability, UVLO hysteresis (0.2 V on Vcc/Vc), Fb reference voltage (1.25 V), and SOIC/TSSOP package compatibility with IRF7313-type power stages.
Technical Context
The IRU3037CFTRPBF implements voltage-mode control using a precision 1.25 V internal reference and error amplifier with external compensation (Comp pin). Its fixed 200 kHz oscillator generates a linear sawtooth ramp for PWM comparison, enabling stable duty-cycle modulation across load transients.
It integrates dedicated high-side (HDrv) and low-side (LDrv) drivers with 500 mA peak current, supports bootstrapped high-side gate drive via Vc (≥4 V above bus), and includes latch-off protection triggered by Fb falling below 0.6 V - critical for DDR Vtt short-circuit resilience and safe sink/source transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 200 kHz - sets minimum output ripple period and inductor sizing baseline (e.g., 7 µH for 4 A, 20% ripple) |
| Fb Reference Voltage | 1.25 V ±1.2% - defines output voltage accuracy via external resistor divider (e.g., 3.3 V = R5/R6 × 1.25 V) |
| Vcc UVLO Threshold | 4.2 V with 0.2 V hysteresis - prevents erratic startup until main supply stabilizes, avoiding shoot-through risk |
| Vc UVLO Threshold | 3.3 V with 0.2 V hysteresis - ensures high-side driver has sufficient boost margin before enabling HDrv |
| Output Undervoltage Latch | 0.6 V on Fb - shuts down PWM and latches off during output short, protecting external MOSFETs and load |
| Peak Gate Drive Current | 500 mA - drives IRF7313 dual N-MOSFETs with <100 ns rise/fall times under 1500 pF load |
| Soft-Start Charge Current | 75 µA - enables precise startup time control (e.g., 7.5 ms with 0.1 µF capacitor) |
Pinout & Package
IRU3037CFTRPBF uses an 8-pin lead-free TSSOP (F) package with exposed thermal pad (θJA = 160°C/W), optimized for compact DDR memory power delivery and board-level thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Fb | Error amplifier inverting input | Monitors output via resistor divider; 1.25 V reference sets regulation point; latch-off triggers at <0.6 V |
| Vcc | Bias supply input | Powers internal logic and low-side driver; requires ≥1 µF HF decoupling to ground |
| LDrv | Low-side N-MOSFET gate driver output | 500 mA sink/source; directly drives lower FET (e.g., IRF7313 Channel 2) |
| Gnd | Analog/digital ground reference | Mandatory low-impedance connection to PCB ground plane; decouples Vcc/Vc noise |
| HDrv | High-side N-MOSFET gate driver output | 500 mA sink/source; requires external bootstrap diode (BAT54) for negative inductor current handling |
| Vc | High-side driver boost supply | Must be ≥4 V above switch node; powers HDrv; requires ≥1 µF HF decoupling to Gnd |
| Comp | Error amplifier compensation node | External RC network (e.g., 25 kΩ + 1 nF) sets loop stability and transient response |
| SS/SD | Soft-start timing / shutdown control | 75 µA internal current source charges external cap; <0.5 V forces shutdown and sync-FET-on state |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-frequency voltage-mode control | 200 kHz operation ensures predictable EMI profile and simplifies filter design vs. current-mode alternatives |
| Programmable soft-start | 75 µA internal current source enables precise 1–20 ms startup ramping, limiting inrush into bulk capacitors |
| Dual independent gate drivers | 500 mA peak drive per output supports fast switching of logic-level N-MOSFETs without external buffers |
| Output short-circuit latch protection | 0.6 V Fb threshold triggers irreversible shutdown until power cycle, preventing thermal runaway in DDR Vtt faults |
| Independent UVLO on Vcc and Vc | 4.2 V / 3.3 V thresholds with 0.2 V hysteresis ensure coordinated enablement of logic and high-side drive blocks |
Applications
| DDR Memory Vtt Source/Sink | On-Board 5V-to-3.3V Buck Converter |
|---|---|
Use Scenario: Powering DDR SDRAM termination voltage (Vtt) that must both source and sink current during data line transitions. IC Role / Device Role / Timing Role: Synchronous buck controller managing bidirectional current flow via complementary N-MOSFETs, with fast transient response enabled by voltage-mode loop. Use Value: Eliminates need for discrete op-amp-based active terminators; supports JEDEC-compliant Vtt tracking within ±25 mV of Vddq/2. | Use Scenario: Generating stable 3.3 V rail from 5 V main supply in graphics cards or HDD controllers where space and cost are constrained. IC Role / Device Role / Timing Role: Primary DC-DC controller setting output via Fb divider, driving IRF7313 MOSFET pair at 200 kHz for minimal inductor size. Use Value: Achieves >90% efficiency at 4 A load with <100 mV output ripple, reducing thermal load vs. linear regulators. |
| On-Board 5V-to-2.5V Buck Converter | On-Board 5V-to-1.8V Buck Converter |
Use Scenario: Supplying 2.5 V core voltage to legacy ASICs or interface ICs in industrial embedded systems with 5 V backplane. IC Role / Device Role / Timing Role: Fixed-frequency synchronous controller delivering regulated output with UVLO-protected startup and soft-start-controlled inrush. Use Value: Enables use of low-cost, standard-value inductors (e.g., 5.6 µH) while maintaining <1.5% load regulation from 0.5–4 A. | Use Scenario: Providing 1.8 V supply to modern low-power microcontrollers or FPGA I/O banks in compact consumer electronics. IC Role / Device Role / Timing Role: Precision 1.25 V reference-based controller ensuring tight output tolerance (±1%) across temperature and line variation. Use Value: Supports dynamic voltage scaling with <50 µs recovery from 10–90% load steps, minimizing brownout risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRU3037CSRPBF | Same die, SOIC-8 package (θJA = 124°C/W); identical electrical specs and pinout | Better thermal performance in high-ambient or high-airflow environments; larger footprint than TSSOP | Select when board layout allows SOIC-8 and thermal derating below 125°C junction is required |
| TPS5430DDAR | 3.5 V–36 V input, 3 A integrated FETs, 500 kHz adjustable frequency, no external Vc boost needed | Eliminates external MOSFETs and bootstrap components; higher BOM cost but smaller solution size | Select when integration, wider VIN range, or higher switching frequency (for smaller magnetics) outweighs discrete MOSFET flexibility |
Compared with IRU3037CFTRPBF, IRU3037CSRPBF offers superior thermal dissipation in SOIC-8 form, while TPS5430DDAR trades external component count for reduced design effort and higher input voltage support - making it suitable for non-DDR, wide-input applications where discrete FET optimization is unnecessary.
Availability
IRU3037CFTRPBF is available at Aetrix Electronics and suitable for DDR memory Vtt source/sink, on-board 5V-to-3.3V/2.5V/1.8V buck converters, and graphics card power delivery requiring stable component supply across extended production cycles.
Supply support for IRU3037CFTRPBF 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 global semiconductor leader specializing in power management, automotive, and industrial control ICs, with deep expertise in high-efficiency power conversion architectures.
The IRU3037 product line targets cost-sensitive, high-volume DC-DC applications requiring synchronous buck control with robust fault protection - especially DDR memory termination and embedded system point-of-load regulation.
FAQ
What is the purpose of the Vc pin, and what voltage must it supply?
The Vc pin supplies power to the high-side gate driver and must be at least 4 V higher than the switch-node voltage (e.g., ≥9 V for a 5 V output buck). It powers the HDrv output and requires a minimum 1 µF high-frequency ceramic capacitor to ground for stable peak-current delivery during switching transitions.
How does the IRU3037CFTRPBF respond to an output short circuit?
When the Fb voltage drops below 0.6 V due to output shorting, the device latches off all PWM outputs and holds shutdown until power is cycled. This prevents sustained shoot-through current and thermal damage to external MOSFETs, providing hardware-level fault containment without external supervision.
Can the IRU3037CFTRPBF operate with only a 3.3 V input supply?
No - the Vcc UVLO threshold is 4.2 V, and the Vc supply must exceed the output bus by ≥4 V. For a 1.8 V output, Vc must be ≥5.8 V; thus, a 3.3 V input cannot meet minimum bias requirements for either Vcc or Vc, making it incompatible with sub-4 V input rails.
What is the function of the SS/SD pin during normal operation and shutdown?
During normal operation, the SS/SD pin hosts a 75 µA internal current source charging an external capacitor to ramp the error amplifier output, controlling soft-start duration. When pulled below 0.5 V, it forces immediate shutdown: HDrv turns off, LDrv turns on fully, and PWM is disabled - placing the output in a safe, low-impedance sink state.
IRU3037CFTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Type:
- Transistor Driver
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Boost
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.2V ~ 25V
- Frequency - Switching:
- 200kHz
- Duty Cycle (Max):
- 90%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Soft Start
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
IRU3037CFTRPBF FAQ
1.How can I place an order for IRU3037CFTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IRU3037CFTRPBF 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 IRU3037CFTRPBF reliable?
The price and inventory of IRU3037CFTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRU3037CFTRPBF is usually 5 days.
3.What payment methods are accepted for IRU3037CFTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRU3037CFTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRU3037CFTRPBF?
IRU3037CFTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRU3037CFTRPBF 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 IRU3037CFTRPBF?
For technical support, including IRU3037CFTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRU3037CFTRPBF requirements.
6.How does Aetrix verify that IRU3037CFTRPBF is sourced from the original manufacturer or authorized distributors?
All IRU3037CFTRPBF 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 IRU3037CFTRPBF meets industry standards.
7.What is the process for return or replacement of IRU3037CFTRPBF?
All IRU3037CFTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRU3037CFTRPBF, 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 IRU3037CFTRPBF part is unused and in its original packaging.
Return procedure for IRU3037CFTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IRU3037CFTRPBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
