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Infineon Technologies 111-3013
- Part No.:
- 111-3013
- Manufacturer:
- Infineon Technologies
- Category:
- DC DC Switching Controllers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
111-3013.pdf
- Description:
- IC REG CTRLR BUCK/BOOST 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,355
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Product details
Overview
IRU3037 from Infineon Technologies is a fixed-frequency, voltage-mode synchronous PWM controller IC for buck DC-DC conversion, supporting 5V/12V input and generating regulated outputs down to 1.8V at >3A. It integrates a 200kHz oscillator, 500mA peak gate drivers (high-side and low-side), programmable soft-start, output undervoltage latch, and dual UVLO (Vcc ≥4.2V, Vc ≥3.3V). Used in DDR memory Vtt source/sink and graphics card power rails.
For engineers reviewing the IRU3037 datasheet, IRU3037 pinout, IRU3037 application, or IRU3037 equivalent, key selection considerations include its 200kHz switching frequency, 1.25V reference voltage, SOIC-8/TSSOP-8 package compatibility, and requirement for external dual N-channel MOSFETs (e.g., IRF7313) to form a complete synchronous buck stage.
Technical Context
The IRU3037 implements voltage-mode PWM control with a precision 1.25V internal reference and error amplifier driving a fixed-frequency sawtooth comparator. Its oscillator uses an on-chip capacitor to set 200kHz operation (IRU3037A: 400kHz), enabling stable loop design with external RC compensation on the Comp pin.
Protection logic includes latched output shutdown on Fb <0.6V (short-circuit), POR-initiated soft-start via SS/SD pin current source (75µA), and independent UVLO monitoring of both Vcc (4.2V threshold) and Vc (3.3V threshold) supplies-ensuring safe startup and fault recovery without external supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 200 kHz - Sets fixed switching period for predictable EMI profile and inductor sizing (e.g., 5.6 µH for 3.3V/4A). |
| Reference Voltage (Fb) | 1.25 V - Defines output voltage setpoint via external resistor divider (e.g., R5=24kΩ, R6=1.24kΩ for 1.5V). |
| Peak Output Drive | 500 mA - Sufficient to drive gate charge of dual N-MOSFETs like IRF7313 within 100 ns rise/fall times. |
| UVLO Threshold (Vcc) | 4.2 V - Prevents erratic operation during brown-out; releases only after Vcc exceeds hysteresis (0.2 V). |
| Soft-Start Current | 75 µA - Charges external SS capacitor linearly (e.g., 0.1 µF → 7.5 ms ramp) to limit inrush current. |
| Fb Undervoltage Latch | 0.6 V - Triggers permanent shutdown on sustained output short, requiring power cycle or SS/SD pin reset. |
Pinout & Package
IRU3037 is available in 8-pin SOIC (S) and TSSOP (F) packages, both RoHS-compliant and thermally rated at θJA = 124°C/W (SOIC) or 160°C/W (TSSOP). Pin layout is identical across variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Fb | Error amplifier inverting input | Connects to resistor divider from output; 1.25V reference sets regulation point; bias current ≤100 µA affects high-R divider accuracy. |
| 2 Vcc | Logic & low-side driver supply | Must be ≥4.2V to enable operation; requires ≥1 µF high-frequency ceramic cap to ground for transient current delivery. |
| 3 LDrv | Low-side N-MOSFET gate driver output | 500 mA sink/source capability; drives lower FET in synchronous buck; no external bootstrap needed. |
| 4 Gnd | Power and signal reference plane | Must connect directly to PCB ground plane; decoupling caps (Vcc, Vc, HDrv) tie here for noise immunity. |
| 5 HDrv | High-side N-MOSFET gate driver output | 500 mA output; requires external boost diode (BAT54) and capacitor for charge-pump gate drive above bus voltage. |
| 6 Vc | High-side driver supply | Must be ≥3.3V and ≥4V above switch node; needs ≥1 µF ceramic cap to ground for peak gate charge delivery. |
| 7 Comp | Error amplifier compensation node | External RC network (e.g., 25kΩ + 1nF) sets loop stability; connects between Comp and Gnd per design example. |
| 8 SS/SD | Soft-start timing / shutdown control | 75 µA current source charges external cap for ramp-up; pulled <0.5V to force immediate shutdown and sync-FET-on state. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-frequency voltage-mode control | 200 kHz oscillator enables predictable EMI filtering and consistent inductor sizing without frequency drift. |
| Dual independent UVLO circuits | Vcc (4.2V) and Vc (3.3V) lockouts prevent partial operation-critical when boost rail (Vc) fails before main supply. |
| Programmable soft-start with latch-off | 75 µA SS current source allows precise ramp time control; SS/SD pin doubles as hardware shutdown input. |
| Output short-circuit protection | Latches off PWM on Fb <0.6V, eliminating need for external fault monitoring circuitry in cost-sensitive designs. |
| Integrated 500 mA dual gate drivers | Drives both high- and low-side N-MOSFETs directly-eliminates discrete driver ICs and reduces BOM count. |
Applications
| DDR Memory Vtt Regulation | Graphics Card Core Power |
|---|---|
|
Use Scenario: Providing matched ±0.05V Vtt termination voltage for DDR2/DDR3 memory buses under dynamic load. IC Role / Device Role / Timing Role: Synchronous buck controller regulating Vtt rail using external dual N-MOSFETs and 5.6 µH inductor. Use Value: Enables fast transient response (<10 µs) to memory bus switching events while maintaining 1.25V reference accuracy over temperature. |
Use Scenario: Generating 1.2V/5A GPU core supply from 5V or 12V board rail in space-constrained graphics modules. IC Role / Device Role / Timing Role: Fixed-frequency PWM controller coordinating high-side/low-side FET timing with 100 ns dead-time control. Use Value: Delivers >90% efficiency at full load using low-RDS(on) MOSFETs (e.g., IRF7313), minimizing thermal footprint. |
| Hard Disk Drive Motor Control | Embedded FPGA I/O Bank Supply |
|
Use Scenario: Powering HDD spindle motor driver ICs requiring clean, ripple-free 3.3V/2A supply with fast load-step recovery. IC Role / Device Role / Timing Role: Voltage-mode controller with external LC filter and 1.25V feedback reference ensuring tight output regulation. Use Value: Soft-start limits inrush during spin-up; UVLO prevents erratic motor behavior during 5V rail sag. |
Use Scenario: Delivering configurable 1.8V/2.5V/3.3V I/O bank supplies for Xilinx/Intel FPGAs with dynamic voltage scaling requirements. IC Role / Device Role / Timing Role: Programmable output controller using resistor-divider feedback and SS/SD pin for sequenced power-up. Use Value: 1.25V reference and precision resistors enable ±1% output accuracy across temperature, meeting FPGA VCCIO specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRU3037A | 400 kHz oscillator (vs. 200 kHz); 0.8 V reference (vs. 1.25 V); 0.4 V Fb UVLO latch (vs. 0.6 V) | Better suited for higher-density layouts needing smaller inductors; lower reference eases low-Vout designs (e.g., 1.2V). | Select IRU3037A when faster transient response and reduced magnetics size outweigh increased switching loss. |
| TPS5430 (Texas Instruments) | 3.5V–36V input range; integrated high-side FET; 500 kHz default frequency; no separate Vc boost rail required | Reduces external component count but lacks independent Vc UVLO and latch-off protection; not pin-compatible. | Choose TPS5430 for simplified 5V–12V-to-3.3V/1.8V designs where board space > protection granularity. |
Compared with IRU3037A, the base IRU3037 offers lower switching loss and simpler gate drive (no Vc boost diode needed for 5V input), while TPS5430 trades discrete FET flexibility for integration-making IRU3037 optimal for cost-sensitive, high-reliability buck stages with external MOSFET optimization.
Availability
IRU3037 is available at Aetrix Electronics and suitable for DDR memory Vtt regulation, graphics card core power, and embedded FPGA I/O bank supply requiring stable component supply across industrial temperature ranges (0°C to 70°C).
Supply support for IRU3037 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 IRU3037 belongs to Infineon's legacy synchronous buck controller product line, designed specifically for cost-optimized, high-current on-board DC-DC conversion in computing and storage applications.
FAQ
What is the minimum recommended input voltage for reliable IRU3037 startup?
The IRU3037 requires Vcc ≥4.2V and Vc ≥3.3V simultaneously to exit UVLO and initiate soft-start. Below these thresholds, the device remains in reset regardless of SS/SD pin state. For 5V input systems, ensure Vcc bypass capacitor is placed close to Pin 2 with low-ESR ceramic construction to avoid droop during inrush.
Can IRU3037 drive high-side and low-side MOSFETs without external level-shifting components?
Yes-the IRU3037 integrates dedicated high-side (HDrv) and low-side (LDrv) drivers with independent supplies (Vc and Vcc). The HDrv output requires only an external bootstrap diode (e.g., BAT54) and capacitor to generate gate voltage >Vbus+4V; no additional level shifters or isolated supplies are needed.
How does the IRU3037 handle output short-circuit conditions?
When Fb voltage drops below 0.6V (IRU3037) or 0.4V (IRU3037A), the device latches off all PWM outputs and holds shutdown until power is cycled or SS/SD is pulled low then released. This prevents thermal runaway in sustained short conditions and eliminates need for external fault latching circuitry.
Is the IRU3037 compatible with lead-free reflow profiles?
Yes-both IRU3037CS (SOIC) and IRU3037CF (TSSOP) variants are offered in PbF (lead-free) versions (e.g., IRU3037CSPbF) qualified for standard JEDEC J-STD-020D reflow profiles with peak temperatures up to 260°C, and compliant with RoHS Directive 2011/65/EU.
111-3013 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
111-3013 FAQ
1.How can I place an order for 111-3013 through Aetrix?
Please submit a Request for Quotation (RFQ) for 111-3013 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 111-3013 reliable?
The price and inventory of 111-3013 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 111-3013 is usually 5 days.
3.What payment methods are accepted for 111-3013?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 111-3013 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 111-3013?
111-3013 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 111-3013 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 111-3013?
For technical support, including 111-3013 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 111-3013 requirements.
6.How does Aetrix verify that 111-3013 is sourced from the original manufacturer or authorized distributors?
All 111-3013 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 111-3013 meets industry standards.
7.What is the process for return or replacement of 111-3013?
All 111-3013 units undergo pre-shipment inspection (PSI). If there is an issue with 111-3013, 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 111-3013 part is unused and in its original packaging.
Return procedure for 111-3013:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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