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Renesas RAA2124224GNP#MA0
- Part No.:
- RAA2124224GNP#MA0
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- -
- Datasheet:
-
RAA2124224GNP#MA0.pdf
- Description:
- SMALL REEL, WIDE VIN 1.1A WITH L
- Quantity:
- Payment:
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Inventory:2,663
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Product details
Overview
RAA2124224GNP#MA0 from Renesas Electronics is a dual-channel synchronous buck regulator IC integrating a 40V-input/1.1A wide-VIN channel and a 5.5V-input/1.5A low-VIN channel in a single 22-pin QFN package. It delivers high-efficiency DC/DC conversion for distributed power systems, supports PFM/PWM light-load operation, features programmable soft-start and hiccup overcurrent protection, and operates across -40°C to +125°C for industrial and medical applications.
For engineers reviewing the RAA2124224GNP#MA0 datasheet, RAA2124224GNP#MA0 pinout, RAA2124224GNP#MA0 application, or RAA2124224GNP#MA0 equivalent, key selection criteria include input voltage range compatibility (3–40V and 2.7–5.5V), dual-output regulation stability, integrated MOSFETs eliminating external gate drivers, 1MHz fixed-frequency operation on the low-VIN channel, and thermal shutdown with 150°C trip point.
Technical Context
The RAA2124224GNP#MA0 implements two independent synchronous buck controllers: Channel 1 uses an N-channel high-side MOSFET (312 mΩ) and N-channel low-side MOSFET (173.8 mΩ) with adjustable 300kHz–2MHz switching frequency and selectable PFM/PWM mode; Channel 2 employs a PMOS high-side switch (117 mΩ) and NMOS low-side switch (86 mΩ), enabling 100% duty cycle operation and eliminating the need for a boot capacitor.
Both channels integrate internal compensation options (50 µA/V for wide-VIN, 40 µA/V for low-VIN), power-good monitoring with ±5% threshold hysteresis, and thermal shutdown with 25°C hysteresis. The wide-VIN channel supports external frequency programming via FS1 and synchronization via SYNC1, while the low-VIN channel operates at a fixed 1MHz switching frequency optimized for fast transient response and small inductor sizing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Wide-VIN Input Range | 3V to 40V - supports 12V/24V/36V industrial rails and automotive battery-supplied systems without pre-regulation |
| Low-VIN Input Range | 2.7V to 5.5V - compatible with Li-ion, USB, and logic-supply domains including 3.3V and 5V sources |
| Output Currents | 1.1A (Channel 1), 1.5A (Channel 2) - sufficient for FPGA core I/O, microcontroller subsystems, and sensor interfaces |
| Switching Frequencies | 300kHz–2MHz (adjustable, Channel 1); 850–1150kHz typical (fixed 1MHz, Channel 2) - enables compact magnetics and EMI control |
| Feedback Reference Voltage | 0.599V (Channel 1), 0.600V (Channel 2) - enables precise output regulation down to sub-1V levels with standard resistor dividers |
| Thermal Shutdown Threshold | 150°C with 25°C hysteresis - ensures safe operation under sustained overload or poor PCB thermal design |
| Operating Temperature | -40°C to +125°C - qualified for industrial, medical, and cloud infrastructure environments |
Pinout & Package
RAA2124224GNP#MA0 is housed in a RoHS-compliant 22-lead 3mm × 6mm TDFN (QFN) package with exposed thermal pad (EPAD). The package supports high-power dissipation and provides low-inductance ground paths essential for stable high-frequency switching.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | Wide-VIN input supply | Primary input for 3–40V rail; requires ≥4.7µF ceramic decoupling close to pin |
| VIN2 | Low-VIN input supply | Input for 2.7–5.5V rail; powers low-VIN regulator and internal bias LDO; requires ≥10µF ceramic decoupling |
| LX1 / LX2 | Switch node outputs | Connects to external inductors; LX1 drives N-MOS high-side; LX2 drives PMOS high-side (no boot cap needed) |
| FB1 / FB2 | Feedback inputs | Inverting inputs to error amplifiers; set output voltage via resistor divider; used by PG and UVLO circuits |
| PG1 / PG2 | Open-drain power-good outputs | Indicate regulation status; pulled low during soft-start or out-of-regulation; internal 5MΩ pull-up |
| EN1 / EN2 | Enable inputs | Logic-controlled startup: EN1 >1V enables wide-VIN channel; EN2 >1.4V enables low-VIN channel |
| COMP1 / COMP2 | Error amplifier outputs | Support internal (tie to VCC1/VIN2) or external RC compensation for loop stability tuning |
| FS1 | Frequency select | Tie to VCC1 for 500kHz; connect resistor to GND for 300kHz–2MHz adjustment |
| SYNC1 | Synchronization input | Accepts external clock (≥300kHz) for noise reduction; also selects PFM/PWM mode when tied high/low |
| SS1 | Soft-start control | Capacitor-to-ground sets ramp time; tie to VCC1 for internal 2ms soft-start |
| GND1 / GND2 / GND (EPAD) | Power grounds | Separate ground returns for each channel plus common EPAD; must connect EPAD to system GND with ≥5 vias |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual buck regulators | Eliminates need for two discrete converters, reducing BOM count, board area, and design complexity |
| PMOS high-side on low-VIN channel | Removes requirement for boot capacitor, simplifying layout and improving reliability in space-constrained designs |
| 100% duty cycle capability (low-VIN) | Enables dropout operation down to VOUT2 = VIN2 – 0.1V, critical for battery-powered systems near end-of-life |
| Selectably PFM or PWM light-load mode | Boosts efficiency at light loads (e.g., standby) while maintaining low-noise PWM operation when required |
| Hiccup-mode overcurrent protection | Prevents thermal runaway during sustained short-circuit events by cycling enable instead of latching off |
| Independent soft-start and power-good signals | Allows sequenced power-up of downstream ICs and reliable system-level fault detection without external circuitry |
Applications
| Industrial Control Systems | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Powering isolated analog front-ends, digital signal processors, and communication interfaces in PLCs and motor drives. IC Role / Device Role / Timing Role: Dual-output DC/DC regulator providing clean, sequenced 5V and 1.2V supplies for mixed-signal subsystems. Use Value: Integrated thermal shutdown and hiccup OCP ensure robust operation in unattended factory-floor deployments. |
Use Scenario: Supplying FPGA configuration, ADC/DAC bias, and display backlight drivers in portable ultrasound and patient monitors. IC Role / Device Role / Timing Role: High-efficiency dual buck delivering regulated 3.3V (wide-VIN) and 1.8V (low-VIN) from a 24V main rail or Li-ion battery. Use Value: 125°C operating temperature and 150°C thermal shutdown meet IEC 60601-1 safety margins for Class II medical devices. |
| Cloud Infrastructure Servers | FPGA and ASIC Power Delivery |
Use Scenario: Point-of-load regulation for baseboard management controllers (BMC), fan controllers, and PCIe switch logic in rack-mounted servers. IC Role / Device Role / Timing Role: Dual-channel regulator generating 5V for USB peripherals and 1.2V for low-power SoCs from a 12V intermediate bus. Use Value: Fixed 1MHz switching on low-VIN channel enables use of 1.5µH inductors, reducing solution size and cost vs. lower-frequency alternatives. |
Use Scenario: Core and auxiliary voltage rails for Xilinx Artix-7 or Intel Cyclone V FPGAs requiring tightly regulated 1.0V core and 2.5V I/O supplies. IC Role / Device Role / Timing Role: Synchronous buck regulator delivering 1.1A at 1.0V (Channel 1) and 1.5A at 2.5V (Channel 2) with independent soft-start. Use Value: Programmable soft-start (SS1) and separate EN pins allow precise power sequencing to prevent FPGA configuration faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z (Monolithic Power) | Single-channel 36V/0.6A buck; no integrated low-VIN channel or PMOS high-side; requires external boot cap | Only suitable for single-rail applications; lacks dual-output coordination and 100% duty cycle capability | Select only if system needs only one regulated output and board space allows discrete low-VIN stage |
| TPS54202DDCR (Texas Instruments) | Single-channel 60V/2A buck with integrated FETs; no second channel; higher VIN max but no low-VIN optimization | Cannot replace dual-rail functionality without adding a second IC; lacks PMOS-based low-VIN architecture | Consider only for high-input-voltage-only systems where 5.5V input support and 100% duty cycle are not required |
Compared with MP2451DT-LF-Z and TPS54202DDCR, the RAA2124224GNP#MA0 uniquely integrates two functionally asymmetric buck stages - one optimized for wide input range and another for ultra-low input with PMOS topology - enabling true single-package dual-rail solutions with reduced component count and improved thermal performance.
Availability
RAA2124224GNP#MA0 is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, and cloud infrastructure applications requiring stable component supply, extended temperature operation, and dual-output DC/DC integration.
Supply support for RAA2124224GNP#MA0 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 timing solutions for industrial, automotive, and enterprise markets.
The RAA212422 product line delivers highly integrated dual-output DC/DC regulators targeting space-constrained, thermally demanding applications such as programmable logic controllers, portable medical instruments, and server baseboard power systems.
FAQ
What input voltage ranges does the RAA2124224GNP#MA0 support for each channel?
The RAA2124224GNP#MA0 supports 3V to 40V on its wide-VIN channel (VIN1) and 2.7V to 5.5V on its low-VIN channel (VIN2). These ranges are independently rated and tested per datasheet Section 2.3. The wide-VIN channel accommodates 12V/24V/36V industrial buses, while the low-VIN channel is optimized for Li-ion batteries, USB ports, and logic-supply domains. Both channels maintain regulation across their full specified ranges at full load and temperature.
Does the RAA2124224GNP#MA0 require an external boot capacitor for either channel?
No, the RAA2124224GNP#MA0 does not require an external boot capacitor for its low-VIN channel because it uses a PMOS high-side switch - a key architectural feature confirmed in the datasheet's "Low VIN Buck Regulator" section and Figure 5 block diagram. However, the wide-VIN channel (VIN1/LX1) does require a 100nF capacitor between BOOT1 and LX1, as explicitly stated in Pin Description #7. This asymmetry reduces component count and improves reliability for the low-VIN path.
How is output voltage programmed on the RAA2124224GNP#MA0?
Output voltage on both channels is programmed externally using resistor dividers connected to FB1 and FB2. The internal reference is 0.599V (Channel 1) and 0.600V (Channel 2), so VOUT = VREF × (1 + R1/R2). Table 1 and Table 2 in the datasheet provide validated component values for common outputs (e.g., 5V, 3.3V, 1.2V). No internal DAC or digital interface is present - all regulation is analog feedback-based, ensuring deterministic behavior without firmware dependencies.
What protection features are integrated into the RAA2124224GNP#MA0?
The RAA2124224GNP#MA0 integrates thermal shutdown (150°C trip, 25°C hysteresis), hiccup-mode overcurrent protection (with 8-cycle auto-restart), input undervoltage lockout (UVLO), and power-good monitoring with ±5% threshold hysteresis. It also includes negative current limiting (–0.6A typical on Channel 1, –1.75A on Channel 2) and zero-cross detection to prevent reverse conduction. All protections are hardware-based and operate independently per channel, as verified in Sections 2.4 and 4.7 of the datasheet.
Can the RAA2124224GNP#MA0 synchronize its switching frequency to an external clock?
Yes, the RAA2124224GNP#MA0 supports external synchronization on its SYNC1 pin. When driven with a clean CMOS clock signal exceeding the programmed internal frequency (minimum 300kHz, maximum 2MHz), the wide-VIN channel aligns its switching edge to the rising edge of the external source. This capability is documented in Pin Description #6 and Section 5.4 ("Synchronization Control"). The low-VIN channel operates at fixed 1MHz and does not support sync; only Channel 1 is synchronizable.
RAA2124224GNP#MA0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- -
RAA2124224GNP#MA0 FAQ
1.How can I place an order for RAA2124224GNP#MA0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RAA2124224GNP#MA0 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 RAA2124224GNP#MA0 reliable?
The price and inventory of RAA2124224GNP#MA0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RAA2124224GNP#MA0 is usually 5 days.
3.What payment methods are accepted for RAA2124224GNP#MA0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RAA2124224GNP#MA0 transactions.
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RAA2124224GNP#MA0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RAA2124224GNP#MA0 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 RAA2124224GNP#MA0?
For technical support, including RAA2124224GNP#MA0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RAA2124224GNP#MA0 requirements.
6.How does Aetrix verify that RAA2124224GNP#MA0 is sourced from the original manufacturer or authorized distributors?
All RAA2124224GNP#MA0 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 RAA2124224GNP#MA0 meets industry standards.
7.What is the process for return or replacement of RAA2124224GNP#MA0?
All RAA2124224GNP#MA0 units undergo pre-shipment inspection (PSI). If there is an issue with RAA2124224GNP#MA0, 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 RAA2124224GNP#MA0 part is unused and in its original packaging.
Return procedure for RAA2124224GNP#MA0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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