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Infineon Technologies IRU3037ACSPBF
- Part No.:
- IRU3037ACSPBF
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IRU3037ACSPBF.pdf
- Description:
- IC REG CTRLR BUCK/BOOST 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,225
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Product details
Overview
IRU3037ACSPBF from Infineon Technologies is a fixed-frequency voltage-mode synchronous PWM controller IC for buck DC-DC conversion, supporting 400 kHz switching, 500 mA peak gate drive, and dual N-channel MOSFET control in SOIC-8 package. It delivers precise 1.25 V reference (0.8 V for IRU3037A), under-voltage lockout on Vcc (4.2 V) and Vc (3.3 V), and latch-off short-circuit protection at 0.4 V output fault threshold - used in DDR memory Vtt source/sink rails.
For engineers reviewing the IRU3037ACSPBF datasheet, IRU3037ACSPBF pinout, IRU3037ACSPBF application, or IRU3037ACSPBF equivalent, key selection criteria include oscillator frequency (400 kHz), soft-start programmability via external capacitor, Fb input bias current (64 µA), UVLO hysteresis (0.2 V), and compatibility with logic-level N-MOSFETs such as IRF7313.
Technical Context
The IRU3037ACSPBF implements a voltage-mode PWM architecture with internal 400 kHz oscillator, precision 1.25 V error amplifier reference, and independent UVLO monitoring of both Vcc (4.2 V threshold) and Vc (3.3 V threshold). Its soft-start circuit sources 20 µA to charge an external capacitor, ramping output voltage linearly to prevent overshoot and limit inrush current.
Short-circuit protection latches off PWM outputs when feedback voltage drops below 0.4 V (IRU3037A-specific), while boost supply (Vc) must exceed output bus voltage by ≥4 V to drive high-side N-MOSFETs. The controller requires external compensation (Comp pin) and supports shutdown via SS/SD pin pulled below 0.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 400 kHz - sets fixed switching period for predictable EMI profile and inductor sizing. |
| Reference Voltage (Fb) | 1.25 V - defines output regulation setpoint via external resistor divider; enables 1.8 V, 2.5 V, or 3.3 V rail generation. |
| Vcc UVLO Threshold | 4.2 V - prevents operation until main supply stabilizes, avoiding erratic startup behavior. |
| Vc UVLO Threshold | 3.3 V - ensures high-side driver is powered sufficiently before enabling gate drive. |
| Fb Input Bias Current | 64 µA - impacts resistor divider accuracy; requires ≤1% tolerance resistors for <1% output error. |
| Peak Output Drive | 500 mA - sufficient to rapidly charge/discharge gate capacitance of dual N-MOSFETs like IRF7313. |
| Short-Circuit Trip Voltage | 0.4 V - triggers latch-off protection when output collapses due to load fault or sync-FET short. |
| Soft-Start Charge Current | 20 µA - determines ramp time via external capacitor (e.g., 0.1 µF → ~7.5 ms startup). |
Pinout & Package
IRU3037ACSPBF is housed in an 8-pin plastic SOIC NB (Small Outline Integrated Circuit, Narrow Body) package with standard 1.27 mm pitch and surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Fb | Error amplifier inverting input | Connects to resistor divider output; regulates output voltage by comparing against 1.25 V internal reference. |
| 2 Vcc | Bias supply input | Powers internal logic and low-side driver; requires ≥1 µF high-frequency bypass to ground. |
| 3 LDrv | Low-side N-MOSFET gate driver output | Sinks/source up to 500 mA; directly drives gate of synchronous rectifier MOSFET. |
| 4 Gnd | Analog/digital ground reference | Mandatory low-impedance connection to PCB ground plane; decoupling caps tie here. |
| 5 HDrv | High-side N-MOSFET gate driver output | Drives upper switch gate; requires external bootstrap diode (e.g., BAT54) for negative-current handling. |
| 6 Vc | Boost supply input | Must be ≥4 V above output bus voltage; powers high-side driver; bypass with ≥1 µF capacitor. |
| 7 Comp | Error amplifier compensation node | External RC network sets loop stability; critical for transient response and phase margin. |
| 8 SS/SD | Soft-start / shutdown control | Internal 20 µA current source charges external cap for soft-start; pulled <0.5 V to force shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 400 kHz switching frequency | Enables consistent filter design and predictable EMI filtering without external timing components. |
| Programmable soft-start | 20 µA internal current source allows precise control of output ramp rate using one external capacitor. |
| Latch-off short-circuit protection | Shuts down PWM outputs permanently upon 0.4 V Fb fault detection, preventing thermal runaway. |
| Dual UVLO monitoring | Independent lockout on Vcc (4.2 V) and Vc (3.3 V) ensures both power domains are valid before operation. |
| 500 mA peak gate drive capability | Supports fast turn-on/turn-off of logic-level N-MOSFETs (e.g., IRF7313) without external drivers. |
Applications
| DDR Memory Vtt Rail | Graphics Card Core Supply |
|---|---|
Use Scenario: Providing terminated voltage (Vtt) for DDR SDRAM data lines in desktop and server memory modules. IC Role / Device Role / Timing Role: Synchronous buck controller regulating 0.9 V–1.25 V Vtt rail with tight DC accuracy and fast transient response. Use Value: Maintains signal integrity across high-speed DDR interfaces by delivering stable, low-noise Vtt with ±1% regulation and <100 mV ripple. | Use Scenario: Generating core voltage for GPU ASICs requiring 1.0 V–1.2 V at >3 A with rapid load transients. IC Role / Device Role / Timing Role: Primary voltage-mode PWM controller driving dual N-MOSFETs to regulate GPU core rail. Use Value: Achieves >90% efficiency at full load and suppresses output droop during 0→3 A step loads via fast-compensated loop. |
| Hard Disk Drive Motor Control | Industrial FPGA I/O Bank Supply |
Use Scenario: Powering spindle motor driver ICs and servo controllers in 2.5" and 3.5" HDDs. IC Role / Device Role / Timing Role: On-board DC-DC converter stepping 5 V or 12 V down to 3.3 V or 2.5 V for motor driver logic rails. Use Value: Delivers clean, regulated power with UVLO hysteresis preventing brownout-induced motor stall or commutation errors. | Use Scenario: Supplying configurable I/O bank voltages (1.8 V, 2.5 V, 3.3 V) for Xilinx/Intel FPGAs in industrial PLCs. IC Role / Device Role / Timing Role: Programmable buck controller supporting multiple output voltages via resistor-divider reconfiguration. Use Value: Enables single-BOM flexibility across FPGA I/O standards while maintaining ±1.5% output accuracy over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS5430DR | 3.5 V–36 V input range; integrated high-side MOSFET; 3.5 A output; no Vc boost requirement. | Eliminates need for external high-side FET and bootstrap circuit; suited for simpler, lower-current designs. | Choose when board space is constrained and output current ≤3.5 A; not suitable for >4 A or ultra-low-Vout (<1.2 V) rails. |
| ISL6208CRZ | 600 kHz switching; 3 A integrated drivers; supports CPU VRM 10.x protocols; no latch-off short protection. | Designed for mobile CPU core supplies with dynamic VID interface; lacks dedicated latch-off fault mode. | Prefer for notebook CPU power delivery where VID programming and fast transient response are prioritized over latch safety. |
Compared with TPS5430DR and ISL6208CRZ, IRU3037ACSPBF offers superior latch-off short-circuit protection and explicit Vc boost control for high-efficiency discrete N-MOSFET designs, making it optimal for DDR Vtt and industrial FPGA rails where reliability under fault conditions is critical.
Availability
IRU3037ACSPBF is available at Aetrix Electronics and suitable for DDR memory Vtt regulation, graphics card core supplies, and industrial FPGA I/O bank power delivery requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for IRU3037ACSPBF 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 manufacturer specializing in power management, automotive, and industrial control ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.
The IRU3037A product line targets cost-sensitive, high-reliability synchronous buck regulators for memory and computing infrastructure, emphasizing robust fault protection and discrete MOSFET flexibility.
FAQ
What is the function of the Vc pin on IRU3037ACSPBF?
The Vc pin supplies power to the high-side gate driver and must be at least 4 V higher than the output bus voltage to ensure full enhancement of the upper N-MOSFET. It requires a minimum 1 µF high-frequency ceramic capacitor to ground for stable peak current delivery during switching transitions.
How does the IRU3037ACSPBF implement short-circuit protection?
It monitors the Fb pin voltage and latches off all PWM outputs when Fb falls below 0.4 V - corresponding to a severe output collapse (e.g., shorted load or failed sync-FET). Recovery requires cycling Vcc or resetting the SS/SD pin, ensuring fault isolation.
Can IRU3037ACSPBF operate with a 3.3 V input supply?
No - its Vcc UVLO threshold is 4.2 V, and Vc UVLO is 3.3 V; both supplies must exceed their respective thresholds before operation begins. A 3.3 V-only input cannot power the controller reliably and will prevent startup.
What is the purpose of the SS/SD pin beyond soft-start?
SS/SD serves dual function: during startup, it accepts an internal 20 µA current to charge an external capacitor for controlled output ramp-up; during operation, pulling it below 0.5 V forces immediate shutdown - turning off the control FET and turning on the sync FET to discharge the output safely.
IRU3037ACSPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 400kHz
- 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-SOIC
IRU3037ACSPBF FAQ
1.How can I place an order for IRU3037ACSPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IRU3037ACSPBF 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 IRU3037ACSPBF reliable?
The price and inventory of IRU3037ACSPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRU3037ACSPBF is usually 5 days.
3.What payment methods are accepted for IRU3037ACSPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRU3037ACSPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRU3037ACSPBF?
IRU3037ACSPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRU3037ACSPBF 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 IRU3037ACSPBF?
For technical support, including IRU3037ACSPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRU3037ACSPBF requirements.
6.How does Aetrix verify that IRU3037ACSPBF is sourced from the original manufacturer or authorized distributors?
All IRU3037ACSPBF 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 IRU3037ACSPBF meets industry standards.
7.What is the process for return or replacement of IRU3037ACSPBF?
All IRU3037ACSPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRU3037ACSPBF, 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 IRU3037ACSPBF part is unused and in its original packaging.
Return procedure for IRU3037ACSPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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