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Renesas RAA2128324GSP#HA0
- Part No.:
- RAA2128324GSP#HA0
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
RAA2128324GSP#HA0.pdf
- Description:
- 72V 0.5A BUCK REGULATOR W/ DUAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,453
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Product details
Overview
RAA2128324GSP#HA0 from Renesas Electronics is a triple-output power management IC integrating a 4.5V–72V input, 0.5A buck regulator with fixed 6V/12V output and two LDOs delivering 5V@100mA and 3.3V@50mA. It uses peak current-mode control, provides STBY pin-controlled output voltage selection, and targets compact power rails in motor driver and e-bike systems.
For engineers reviewing the RAA2128324GSP#HA0 datasheet, RAA2128324GSP#HA0 pinout, RAA2128324GSP#HA0 application, or RAA2128324GSP#HA0 equivalent, key selection criteria include input voltage range (4.5–72V), buck switching frequency (350kHz in CCM), LDO input compatibility (6–12V for both, 4.5–12V for 3.3V LDO only), thermal shutdown (155°C), and SOIC8-E package constraints.
Technical Context
The RAA2128324GSP#HA0 implements a peak current-mode buck controller with cycle-by-cycle overcurrent protection (0.82A typical limit) and pulse-skipping operation in DCM at light loads. Its internal 0.6Ω high-side MOSFET enables efficient 500mA delivery while supporting wide VIN range and fast transient response.
Two independent LDOs share the LDO_VIN input but operate at different current ratings and input voltage ranges: the 5V LDO requires 6–12V input and delivers 100mA with foldback current limiting; the 3.3V LDO accepts 4.5–12V input and supplies 50mA, also with foldback. Both feature soft-start (2.55ms) and PSRR >69dB at 10kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 72V - supports wide industrial and battery-powered inputs including 48V e-bike and motor drive buses. |
| Buck Output Voltage | Fixed 12V or 6V - selected by STBY pin logic level; no external feedback resistors required. |
| Buck Switching Frequency | 350kHz (CCM) / 90kHz (foldback in DCM) - balances EMI, efficiency, and component size for mid-power applications. |
| LDO_5V Output | 5.0V ±2.5% @ 0–100mA - stable rail for microcontrollers or interface logic with 56dB PSRR at 10kHz. |
| LDO_3V3 Output | 3.3V ±3.9% @ 0–50mA - low-noise (466µVrms) supply for analog sensors or communication peripherals. |
| Thermal Shutdown | 155°C with 20°C hysteresis - protects against sustained overload or poor heatsinking in enclosed environments. |
| Package | SOIC8-E - surface-mount, thermally enhanced package with exposed pad for improved heat dissipation. |
Pinout & Package
RAA2128324GSP#HA0 is housed in an SOIC8-E package with exposed thermal pad on underside for enhanced thermal performance. Pin assignments follow standard top-view layout with GND on pins 2 and 8 for optimal grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Supplies buck converter and internal circuitry; must be decoupled with low-ESR ceramic capacitor near pin. |
| GND | Analog and power ground reference | Pins 2 and 8 connect to common ground plane; critical for noise immunity and thermal path via exposed pad. |
| STBY | Buck output voltage selector | Logic-high sets VOUT = 6V; logic-low sets VOUT = 12V - enables low-power standby mode without external control logic. |
| LDO_3V3 | 3.3V regulated output | Fixed 3.3V rail; requires ≥4.7µF X7R ceramic capacitor within 0.5 inch for stability and low noise. |
| LDO_5V | 5V regulated output | Fixed 5V rail; rated for 100mA load with current foldback protection during short-circuit events. |
| LDO_VIN | LDO bias input | Accepts 6–12V for both LDOs active; 4.5–12V if only 3.3V LDO is used - typically connected to buck output. |
| BST | Bootstrap supply | Connects to SW via 0.1µF X7R capacitor to gate-drive high-side MOSFET; critical for proper buck operation. |
| SW | Switch node | Drives external inductor and freewheel diode; high dv/dt node requiring minimized trace area and tight layout. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-output integration | Reduces BOM count by combining buck + dual-LDO in single SOIC8-E package - eliminates need for discrete regulators and external feedback networks. |
| STBY-controlled output selection | Enables dynamic rail scaling: 12V for full-power motor control, 6V for low-power MCU sleep mode - no firmware or external switch required. |
| Current-limit foldback on both LDOs | Prevents thermal runaway during sustained overload: limits current to 25mA (3.3V) or 50mA (5V) when output drops below 50% of nominal voltage. |
| Comprehensive fault protection | Includes UVLO (4.25V start, 4V stop), buck UVP (30% threshold), hiccup-mode recovery, and OTP - ensures robust operation in harsh environments. |
| Low-noise LDO outputs | 3.3V LDO delivers 466µVrms noise (10Hz–100kHz); 5V LDO delivers 711µVrms - suitable for ADC references and precision analog circuits. |
Applications
| Electric-Bike Power Management | Motor Driver Control Board |
|---|---|
Use Scenario: Powers MCU, gate drivers, and sensors from 48V battery pack with dynamic voltage scaling between ride and standby modes. IC Role / Device Role / Timing Role: Primary power management IC providing 12V for motor gate drivers, 5V for MCU core, and 3.3V for CAN transceivers and analog front-ends. Use Value: Eliminates three discrete regulators; STBY pin enables seamless transition from 12V active mode to 6V low-power state, reducing system quiescent current by >40%. | Use Scenario: Supplies isolated logic-level and analog rails on compact H-bridge driver PCB with limited board space. IC Role / Device Role / Timing Role: Single-chip solution generating 12V for bootstrap circuits, 5V for digital logic, and 3.3V for current-sense amplifiers and encoder interfaces. Use Value: SOIC8-E footprint simplifies layout; integrated LDOs avoid noise coupling from switching node into sensitive analog sections. |
| Industrial PLC I/O Module | Automotive Body Control Unit |
Use Scenario: Provides regulated rails for microcontroller, RS-485 transceivers, and analog input conditioning in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Buck regulator powers 5V logic bus; LDOs deliver clean 3.3V for ADC reference and 5V for isolated communication interfaces. Use Value: Wide 4.5–72V input accommodates 24V DC industrial supply with brownout tolerance; PSRR >72dB at 100Hz suppresses line noise. | Use Scenario: Supplies body electronics subsystems (door modules, lighting controls) from 12V vehicle battery with load-dump resilience. IC Role / Device Role / Timing Role: Generates 5V for microcontroller and 3.3V for LIN transceivers and sensor interfaces; buck output feeds LDO_VIN directly. Use Value: UVLO hysteresis (250mV) prevents oscillation during cranking; thermal shutdown protects against enclosure overheating in sealed modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65263-1RGER | Triple-output buck-buck-LDO (not buck-LDO-LDO); higher 2.25MHz switching frequency; 3.6–18V input only. | Targets space-constrained consumer electronics; lacks 72V input capability and STBY voltage-select function. | Choose TPS65263-1RGER only for low-input-voltage, high-frequency designs where board area is critical and 12V/6V dynamic scaling is unnecessary. |
| MAX20090ATPA/V+T | Single buck + dual LDO; 3.5–65V input; 500mA buck; 150mA/150mA LDOs; no STBY pin - fixed 5V/3.3V outputs. | Designed for automotive infotainment; includes AEC-Q100 qualification and watchdog timer not present in RAA2128324GSP#HA0. | Choose MAX20090ATPA/V+T for AEC-Q100-compliant automotive applications requiring higher LDO current and built-in safety features. |
Compared with TPS65263-1RGER and MAX20090ATPA/V+T, the RAA2128324GSP#HA0 uniquely combines ultra-wide 4.5–72V input, STBY-selectable buck output, and thermally optimized SOIC8-E packaging - making it ideal for industrial motor drives and e-bikes where input voltage range and dynamic rail control are primary requirements.
Availability
RAA2128324GSP#HA0 is available at Aetrix Electronics and suitable for electric-bike power management, motor driver control board power supply, and industrial PLC I/O module applications requiring stable component supply across extended temperature and voltage ranges.
Supply support for RAA2128324GSP#HA0 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, and connectivity solutions for industrial, automotive, and IoT markets.
The RAA2128324GSP#HA0 belongs to Renesas' RAA series of highly integrated power management ICs designed specifically for compact, high-reliability power rails in battery-powered and wide-input industrial systems.
FAQ
What is the maximum input voltage rating for the RAA2128324GSP#HA0?
The RAA2128324GSP#HA0 has an absolute maximum input voltage rating of 76V on the VIN pin, with recommended operating range from 4.5V to 72V. Operation beyond 72V is not advised for long-term reliability, and the device incorporates UVLO that disables operation below 4.25V (typical) to prevent unstable startup.
How does the STBY pin control output voltage on the RAA2128324GSP#HA0?
The STBY pin on the RAA2128324GSP#HA0 selects between two fixed buck output voltages: applying logic-high (≥3V) sets VOUT to 6V, while logic-low (≤0.8V) sets VOUT to 12V. This function operates independently of load conditions and requires no external components - enabling simple hardware-based power-state transitions in the RAA2128324GSP#HA0 design.
Can the RAA2128324GSP#HA0 power both LDOs from a 5V source?
No - the RAA2128324GSP#HA0 requires minimum 6V on LDO_VIN to operate both LDOs simultaneously. The 5V LDO specifically mandates 6–12V input; the 3.3V LDO accepts 4.5–12V, but both cannot be active below 6V. For single-rail operation, 5V input can power only the 3.3V LDO, while the 5V LDO remains unregulated.
What thermal performance can be expected from the RAA2128324GSP#HA0 in SOIC8-E package?
The RAA2128324GSP#HA0 in SOIC8-E package has a typical junction-to-ambient thermal resistance (θJA) of 48°C/W and junction-to-case (θJC) of 7°C/W. With proper PCB copper pour under the exposed pad, it sustains 0.5A buck output continuously at +85°C ambient. Thermal shutdown activates at 155°C junction temperature, with 20°C hysteresis ensuring safe cooldown before restart.
Does the RAA2128324GSP#HA0 require external compensation components?
No - the RAA2128324GSP#HA0 uses internally compensated peak current-mode control for the buck regulator and fixed-compensation architecture for both LDOs. No external RC networks or compensation pins are needed; only standard input/output capacitors, inductor, and bootstrap capacitor are required per the datasheet's Table 1 recommendations.
RAA2128324GSP#HA0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) (1), Linear (LDO) (2)
- Number of Outputs:
- 3
- Frequency - Switching:
- 350kHz
- Voltage/Current - Output 1:
- 6V, 12V, 500mA
- Voltage/Current - Output 2:
- 5V, 100mA
- Voltage/Current - Output 3:
- 3V, 50mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 4.5V ~ 72V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
RAA2128324GSP#HA0 FAQ
1.How can I place an order for RAA2128324GSP#HA0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RAA2128324GSP#HA0 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 RAA2128324GSP#HA0 reliable?
The price and inventory of RAA2128324GSP#HA0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RAA2128324GSP#HA0 is usually 5 days.
3.What payment methods are accepted for RAA2128324GSP#HA0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RAA2128324GSP#HA0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RAA2128324GSP#HA0?
RAA2128324GSP#HA0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RAA2128324GSP#HA0 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 RAA2128324GSP#HA0?
For technical support, including RAA2128324GSP#HA0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RAA2128324GSP#HA0 requirements.
6.How does Aetrix verify that RAA2128324GSP#HA0 is sourced from the original manufacturer or authorized distributors?
All RAA2128324GSP#HA0 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 RAA2128324GSP#HA0 meets industry standards.
7.What is the process for return or replacement of RAA2128324GSP#HA0?
All RAA2128324GSP#HA0 units undergo pre-shipment inspection (PSI). If there is an issue with RAA2128324GSP#HA0, 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 RAA2128324GSP#HA0 part is unused and in its original packaging.
Return procedure for RAA2128324GSP#HA0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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