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Renesas RAA230409GFT#YK0
- Part No.:
- RAA230409GFT#YK0
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- -
- Datasheet:
-
RAA230409GFT#YK0.pdf
- Description:
- IC REG STEP DOWN
- Quantity:
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Product details
Overview
RAA230409GFT#YK0 from Renesas Electronics is a 3-channel synchronous step-down switching regulator with integrated power MOSFETs and one LDO channel, designed for multi-rail power management in space-constrained embedded systems. It delivers 500 mA on ch1, 100 mA on ch2 (LDO), and 1500 mA each on ch3 and ch4, with adjustable output voltages via external resistors and input voltage range of 2.5 V to 5.5 V.
For engineers reviewing the RAA230409GFT#YK0 datasheet, RAA230409GFT#YK0 pinout, RAA230409GFT#YK0 application, or RAA230409GFT#YK0 equivalent, this device supports independent per-channel ON/OFF control, digital soft-start, internal discharge, thermal shutdown (150°C), and timer-latch short-circuit protection - critical for reliable power sequencing in industrial controllers and portable instrumentation.
Technical Context
The RAA230409GFT#YK0 integrates four independent regulation channels: ch1 (500 mA buck), ch2 (100 mA LDO), ch3/ch4 (1500 mA bucks each), all sharing a common analog supply (AVDD) and ground (AGND). Its current-mode PWM architecture enables fast transient response, while the internal phase compensator eliminates external compensation components for ch1–ch4.
Channel-specific configuration is enabled via dedicated pins: CTL4 selects ch4's output mode (internal 1.2 V or external resistor-adjustable), SAVE enables low-power mode (15% nominal switching frequency), and RT/SS pins set oscillator frequency (1.3–2 MHz) and soft-start time (2–4 ms). All switching regulators use synchronous rectification with integrated high-side and low-side MOSFETs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single Li-ion or dual-cell alkaline input without pre-regulation |
| ch1 Output Current | 500 mA - sufficient for core logic rails (e.g., MCU I/O or FPGA banks) |
| ch2 Output Current | 100 mA - suitable for low-noise analog circuitry or sensor biasing |
| ch3/ch4 Output Current | 1500 mA each - powers high-current peripherals such as displays or motor drivers |
| Switching Frequency | 1.3 MHz to 2 MHz - enables compact 2.2 µH inductors and reduces EMI in noise-sensitive applications |
| Output Voltage Flexibility | ch1/ch3/ch4 adjustable via external resistor divider; ch4 selectable between 1.2 V fixed or adjustable via CTL4 pin |
| Thermal Shutdown | 150°C timer-latch - prevents permanent damage during sustained overload or poor PCB thermal design |
| Power-Good Signal | PG1 open-drain output - provides system-level power sequencing confirmation for ch1 only |
Pinout & Package
RAA230409GFT#YK0 uses a 32-pin TQFP package (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad for enhanced heat dissipation. Pin functions are validated per Renesas datasheet R18DS0004EJ0102 Rev. 1.02.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LOUT1 (Pin 1) | Ch1 inductor connection | High-current path for ch1 buck converter output stage; requires low-impedance PCB routing |
| VPIN1 (Pin 2) | Ch1 power input | Supplies high-side MOSFET source; must be decoupled near pin with ≥10 µF ceramic capacitor |
| PGND1 (Pin 3) | Ch1 power ground | Dedicated ground return for ch1 switching loop; separate from AGND to minimize noise coupling |
| II1 (Pin 4) | Ch1 error amplifier inverting input | Feedback node for ch1 output voltage sensing; connects to resistor divider for adjustable regulation |
| PG1 (Pin 5) | Ch1 power-good indicator | Open-drain output asserting high-impedance when ch1 output reaches ≥90% of target voltage |
| CTL4 (Pin 6) | Ch4 output mode select | Logic-high = 1.2 V fixed; logic-low = externally adjustable - enables flexible BOM across product variants |
| SCP (Pin 7) | Short-circuit protection timing | Connects to 0.1 µF capacitor to set latch delay; ties to AGND if SCP disabled |
| SHDNB0 (Pin 32) | Global enable/disable | Active-low master control; disables all channels and halts internal regulators when pulled low |
Key Features
| Feature | Design Value |
|---|---|
| Independent per-channel ON/OFF control | SHDNB0–SHDNB4 pins allow staggered power-up/down sequencing without external logic |
| Digital soft-start with adjustable timing | SS pin accepts resistor to set 2–4 ms ramp time - prevents inrush current and stabilizes upstream supplies |
| Integrated discharge circuit | Automatically discharges LOUT1/LOUT3/LOUT4/OUT2 when disabled - avoids floating rail hazards |
| Timer-latch thermal and short-circuit protection | SCP pin shared by thermal shutdown and short-circuit detection; latches all outputs until SHDNB0 reset |
| Low-power mode via SAVE pin | Reduces ch1/ch3/ch4 switching frequency to 15% of nominal - cuts quiescent current to 0.7 mA typical |
| Internal reference and bias generation | VREF (1.00 V ±2%) and VREG (2.4 V ±4%) provided on dedicated pins - eliminates need for external references |
Applications
| Industrial PLC I/O Module | Portable Medical Sensor Hub |
|---|---|
|
Use Scenario: Powering isolated analog front-end, microcontroller core, communication interface, and display backlight from a single 3.7 V Li-ion battery. IC Role / Device Role / Timing Role: RAA230409GFT#YK0 serves as primary multi-rail PMIC - ch1 (3.3 V) for MCU I/O, ch2 (adjustable 2.5 V) for precision ADC reference, ch3 (1.8 V) for digital logic, ch4 (1.2 V) for core voltage. Use Value: Eliminates four discrete regulators and associated passives; integrated soft-start ensures clean power-up sequence across subsystems without external coordination. |
Use Scenario: Compact wearable device requiring ultra-low standby current, precise analog biasing, and dynamic rail scaling during measurement cycles. IC Role / Device Role / Timing Role: RAA230409GFT#YK0 manages power domains - ch1 (adjustable) for sensor bias, ch2 (low-noise LDO) for op-amp supply, ch3/ch4 (high-current) for Bluetooth radio and display driver. Use Value: SAVE pin enables 0.7 mA operating current in low-power mode; internal discharge prevents residual charge on unused rails during sleep states. |
| Automotive Body Control Unit | Test & Measurement Equipment |
|
Use Scenario: Powering CAN transceiver, microcontroller, EEPROM, and LED indicators in under-hood ECUs subject to wide temperature and load transients. IC Role / Device Role / Timing Role: RAA230409GFT#YK0 delivers robust multi-rail conversion - ch1 (5 V) for CAN PHY, ch2 (3.3 V) for MCU, ch3 (adjustable) for sensor excitation, ch4 (1.2 V) for core logic. Use Value: Timer-latch thermal shutdown (150°C) and short-circuit protection prevent field failures; PG1 confirms ch1 readiness before enabling downstream CAN initialization. |
Use Scenario: Benchtop instrument needing stable, low-noise, and independently controllable supplies for DUT powering, signal conditioning, and digital processing. IC Role / Device Role / Timing Role: RAA230409GFT#YK0 acts as programmable lab-grade supply - ch1/ch3/ch4 deliver adjustable rails up to 1500 mA, ch2 provides clean 100 mA LDO for reference circuits. Use Value: Independent SHDNB pins allow software-controlled rail enable/disable; VREF/VREG outputs serve as calibration references for internal ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-channel PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65218D0RSLR | 4-buck + 3-LDO; higher integration but fixed 1.8/3.3 V outputs; no adjustable ch1/ch3/ch4 | Better for fixed-rail consumer electronics; lacks RAA230409GFT#YK0's external resistor flexibility | Select when BOM simplification outweighs output voltage customization needs |
| ISL9305IRTNZ-T | 3-buck + 2-LDO; supports I²C control and dynamic voltage scaling; smaller 4x4 mm QFN | Suited for battery-powered devices requiring runtime reconfiguration; lacks RAA230409GFT#YK0's standalone pin-control simplicity | Select when firmware-based rail tuning is required and board area is constrained |
Compared with TPS65218D0RSLR and ISL9305IRTNZ-T, RAA230409GFT#YK0 offers superior analog flexibility through resistor-programmable outputs and direct hardware sequencing - ideal for cost-sensitive industrial designs where firmware overhead must be minimized and output voltages vary across product SKUs.
Availability
RAA230409GFT#YK0 is available at Aetrix Electronics and suitable for industrial automation, portable medical instrumentation, automotive body electronics, and test equipment requiring stable component supply and long-term production continuity.
Supply support for RAA230409GFT#YK0 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
Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog power management, and embedded solutions for industrial, automotive, and infrastructure markets.
The RAA23040x series was developed to consolidate multi-rail power delivery in space-constrained embedded systems - emphasizing pin-strapped configurability, thermal resilience, and seamless integration with Renesas MCUs and SoCs.
FAQ
What output voltage options does RAA230409GFT#YK0 support for each channel?
RAA230409GFT#YK0 supports adjustable output voltages on ch1, ch3, and ch4 using external resistor dividers referenced to the internal 0.8 V error amplifier threshold. ch2 is a fixed-output LDO with internal resistor presetting, though its output can be adjusted within limits via external feedback. ch4's mode (fixed 1.2 V or adjustable) is selected by the CTL4 pin. The RAA230409GFT#YK0 datasheet specifies VOUT = (1 + R1/R2) × 0.8 V for all adjustable channels.
How does the SAVE pin affect RAA230409GFT#YK0 operation?
The SAVE pin enables low-power mode: when driven high, it reduces the switching frequency of ch1, ch3, and ch4 to 15% of the nominal value set by the RT pin, lowering total IC current consumption to 0.7 mA typical. This mode is intended for light-load conditions (<100 mA per switching channel) and increases output ripple - the RAA230409GFT#YK0 must be evaluated for stability under these conditions.
Can RAA230409GFT#YK0 operate with only some channels enabled?
Yes. RAA230409GFT#YK0 supports independent per-channel control via SHDNB1–SHDNB4 pins. Unused channels must have their VPIN, LOUT, PGND, and II pins properly terminated per the datasheet - e.g., VPIN tied to AVDD, LOUT/PGND to ground, II to AGND - to prevent malfunction or excessive current draw. The RAA230409GFT#YK0 remains fully functional with any subset of channels active.
What protection features are built into RAA230409GFT#YK0?
RAA230409GFT#YK0 integrates timer-latch thermal shutdown (150°C), timer-latch short-circuit protection (shared SCP pin), foldback overcurrent protection on ch2, and auto-recovery under-voltage lockout (UVLO). All protections latch outputs until SHDNB0 is cycled or AVDD drops below 1.7 V. The RAA230409GFT#YK0 also includes internal discharge circuits on all outputs to safely drain stored energy when disabled.
Is RAA230409GFT#YK0 pin-compatible with other RAA23040x variants?
Yes. All RAA23040x family members, including RAA230409GFT#YK0, share identical 32-pin TQFP and 32-pin VQFN packages and pinouts. Differences are limited to factory-programmed output voltage presets (for RAA230401–RAA230408) or default adjustment modes (RAA230409). No PCB redesign is needed when substituting within the family - only minor schematic updates for feedback networks may apply.
RAA230409GFT#YK0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Topology:
- -
- Number of Outputs:
- -
- Frequency - Switching:
- -
- Voltage/Current - Output 1:
- -
- Voltage/Current - Output 2:
- -
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- -
- w/Supervisor:
- -
- w/Sequencer:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
RAA230409GFT#YK0 FAQ
1.How can I place an order for RAA230409GFT#YK0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RAA230409GFT#YK0 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 RAA230409GFT#YK0 reliable?
The price and inventory of RAA230409GFT#YK0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RAA230409GFT#YK0 is usually 5 days.
3.What payment methods are accepted for RAA230409GFT#YK0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RAA230409GFT#YK0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RAA230409GFT#YK0?
RAA230409GFT#YK0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RAA230409GFT#YK0 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 RAA230409GFT#YK0?
For technical support, including RAA230409GFT#YK0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RAA230409GFT#YK0 requirements.
6.How does Aetrix verify that RAA230409GFT#YK0 is sourced from the original manufacturer or authorized distributors?
All RAA230409GFT#YK0 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 RAA230409GFT#YK0 meets industry standards.
7.What is the process for return or replacement of RAA230409GFT#YK0?
All RAA230409GFT#YK0 units undergo pre-shipment inspection (PSI). If there is an issue with RAA230409GFT#YK0, 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 RAA230409GFT#YK0 part is unused and in its original packaging.
Return procedure for RAA230409GFT#YK0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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