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Renesas RAA211820GSP#HA0
- Part No.:
- RAA211820GSP#HA0
- Manufacturer:
- Renesas
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
RAA211820GSP#HA0.pdf
- Description:
- IC REG BUCK ADJ 2A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,039
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Product details
Overview
RAA211820GSP#HA0 from Renesas Electronics is a 4.5V–75V input, 2A synchronous step-down DC/DC regulator in a 20-lead QFN (4mm × 3.5mm) package with internal compensation, programmable 200–800kHz switching frequency, and integrated 155mΩ/80mΩ MOSFETs. It delivers ±1% load regulation accuracy across –40°C to 125°C and supports industrial power systems requiring high-voltage input and stable point-of-load conversion.
For engineers reviewing the RAA211820GSP#HA0 datasheet, RAA211820GSP#HA0 pinout, RAA211820GSP#HA0 application, or RAA211820GSP#HA0 equivalent, this page provides verified pin functions, real-world thermal derating curves, confirmed soft-start timing (500µs fixed), EBIAS biasing behavior, and validated alternative parts for high-input-voltage buck converter designs.
Technical Context
The RAA211820GSP#HA0 implements peak-current mode control with internal slope compensation and an integrated transconductance error amplifier referenced to 0.8V. Its COMP signal compares sensed high-side current against a dynamically adjusted threshold to regulate output voltage under varying line and load conditions.
It operates in fixed-frequency CCM above half-inductor ripple current and transitions to variable-frequency DCM at light loads using pulse-skipping. Protection includes cycle-by-cycle peak/valley current limiting (3.3A/2.4A), input UVLO (4.25V rising), output undervoltage hiccup (50% VREF), and thermal shutdown (150°C) with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 75V - supports wide industrial and telecom input rails without external pre-regulation |
| Output Current | Up to 2A continuous - sufficient for FPGA core supplies, PoL converters, and base station subsystems |
| Switching Frequency | Programmable 200–800kHz - enables optimization of size vs. efficiency; default 400kHz balances transient response and EMI |
| Feedback Reference | 0.8V ±0.004V (25°C), ±0.008V (–40°C to 125°C) - ensures tight output regulation across temperature |
| Quiescent Current | 95µA typical - minimizes standby power loss in always-on industrial systems |
| MOSFET rDS(ON) | 155mΩ (HS) / 80mΩ (LS) - reduces conduction losses at full load, enabling >90% efficiency at 24VIN→3.3VOUT |
| Soft-Start Time | Fixed 0.5ms (QFN only) - prevents inrush current during power-up without external capacitor |
Pinout & Package
RAA211820GSP#HA0 is housed in a thermally enhanced 20-lead QFN package (4mm × 3.5mm, 0.5mm pitch) with exposed thermal pad connected to AGND. The package supports high-power density layouts with low θJA of 48.3°C/W (JEDEC board) and 27.3°C/W (evaluation board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,13–19 (PGND) | Power Ground | Source connection for low-side FET; must be tied directly to input bypass capacitors and PCB ground plane |
| 2,12 (SW) | Switch Node | Phase node connecting integrated HS/LS FETs; routes to inductor and bootstrap capacitor (BST–SW) |
| 3,20 (VIN) | Main Input Supply | Drain of high-side FET and input to internal LDO; requires local ceramic decoupling to PGND |
| 4 (BST) | Bootstrap Supply | Provides gate drive voltage for high-side FET via external 0.1µF X7R capacitor to SW |
| 5 (EBIAS) | External Bias Input | Accepts 3.3–40V external rail (e.g., VOUT) to reduce power dissipation; auto-switches when >3.1V |
| 6 (FB) | Feedback Input | Inverting input of error amplifier; sets output voltage via resistor divider (VOUT = 0.8V × (1 + RFB1/RFB2)) |
| 7 (AGND) | Analog Ground | Reference for feedback, oscillator, and protection circuits; must connect to clean PCB ground plane |
| 8 (PG) | Power-Good Output | Open-drain indicator asserted when FB reaches 1.2V and stays within ±12% of 0.8V reference |
| 9 (FS) | Frequency Set | Connect to VCC for 400kHz default; tie to AGND via resistor (261kΩ) for exact 400kHz or adjust for 200–800kHz |
| 10 (VCC) | Bias Regulator Output | 3.3V ±0.2V supply for internal logic and gate drivers; decouple with ≥1µF ceramic to AGND |
| 11 (EN) | Enable Input | High-voltage tolerant (76V max); active-high with 1.3V threshold; pull to GND via 1MΩ for controlled shutdown |
| PAD (Thermal) | Thermal Interface | Exposed bottom pad; must be soldered to AGND with ≥3 thermal vias for reliable 2A operation |
Key Features
| Feature | Design Value |
|---|---|
| Internal Loop Compensation | Eliminates need for external compensation network - reduces BOM count and layout sensitivity |
| Integrated High/Low-Side MOSFETs | 155mΩ/80mΩ on-resistance - enables compact, high-efficiency design without discrete power stage |
| PFM + DEM Light-Load Operation | Extends battery life or reduces standby loss in always-on systems by lowering switching frequency below 200kHz |
| External Bias (EBIAS) Support | Allows VOUT or other 3.3–40V rail to power internal circuitry - improves efficiency by avoiding VIN-to-VCC drop |
| Programmable Soft-Start (HTSSOP) / Fixed (QFN) | QFN version uses internal 0.5ms soft-start - prevents output overshoot and inrush without external components |
| Comprehensive Protection Suite | Includes valley current limit, input UVLO, output UVP hiccup, and thermal shutdown - ensures robust field operation |
Applications
| Industrial Power Systems | Distributed Power Supplies |
|---|---|
Use Scenario: Centralized 48V or 72V DC bus powering multiple isolated and non-isolated DC/DC modules in factory automation controllers. IC Role / Device Role / Timing Role: Primary non-isolated buck converter delivering regulated 3.3V/5V/12V to microcontrollers, I/O drivers, and sensors. Use Value: Wide 4.5–75V input range accepts fluctuating industrial bus voltages; 2A output supports multi-rail local regulation without derating. |
Use Scenario: Point-of-load conversion on high-density server blades where space and thermal management are constrained. IC Role / Device Role / Timing Role: Secondary buck regulator stepping down intermediate 12V bus to 1.8V/3.3V for ASICs and memory interfaces. Use Value: Internal compensation and fixed 0.5ms soft-start simplify layout; QFN thermal pad enables 2A delivery in <12mm² footprint. |
| Telecom Base Station Power | High-Voltage Single-Board Systems |
Use Scenario: Powering RF front-end modules and digital signal processors in 5G macrocell base stations with -48V nominal input. IC Role / Device Role / Timing Role: Intermediate buck stage converting -48V (rectified) to +12V for downstream POL converters and analog circuitry. Use Value: 75V absolute max rating accommodates surge transients; PFM/DEM maintains >85% efficiency at 10mA standby load. |
Use Scenario: Embedded vision system with 24V/48V input powering image sensor, FPGA, and interface ICs on single PCB. IC Role / Device Role / Timing Role: Main system regulator providing stable 3.3V for FPGA core and 1.2V for DDR termination (via secondary converter). Use Value: EBIAS pin allows use of FPGA's 3.3V rail to bias RAA211820GSP#HA0 - cuts VCC power loss by ~40% vs. VIN-derived bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5–65V input, 1A output, 100–1000kHz programmable frequency, no internal compensation - requires external RC network | Automotive AEC-Q100 qualified; lacks EBIAS input and integrated soft-start - needs external timing capacitor | Choose for automotive environments requiring qualification; avoid if board space or BOM count is critical |
| MPQ4420AGL-A | 3.3–60V input, 2A output, fixed 400kHz, internal compensation, but no EBIAS or programmable frequency - only QFN-10 package | No light-load PFM/DEM; lower 60V VIN max limits use in 72V industrial systems; smaller package reduces thermal margin at 2A | Consider for cost-sensitive 24–48V applications where EBIAS and extended frequency tuning are unnecessary |
Compared with LM5164QPWPRQ1 and MPQ4420AGL-A, RAA211820GSP#HA0 uniquely combines 75V input capability, EBIAS biasing, and fixed 0.5ms soft-start in QFN - enabling higher-voltage industrial designs with lower component count and improved light-load efficiency.
Availability
RAA211820GSP#HA0 is available at Aetrix Electronics and suitable for industrial power systems, distributed power supplies, and telecom base station power requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for RAA211820GSP#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 management, and connectivity solutions for industrial, automotive, and infrastructure markets.
The RAA211820GSP#HA0 belongs to Renesas' high-voltage DC/DC regulator product line, engineered for rugged industrial and telecom power conversion where wide input range, integrated FETs, and robust protection are essential.
FAQ
What is the maximum input voltage rating for RAA211820GSP#HA0?
The RAA211820GSP#HA0 has an absolute maximum input voltage rating of 76V, with recommended operating range from 4.5V to 75V. This allows direct use with 48V, 60V, and 72V industrial and telecom power buses while accommodating transient surges up to 76V without damage.
Does RAA211820GSP#HA0 require external compensation components?
No, RAA211820GSP#HA0 features fully internal loop compensation. The error amplifier includes built-in compensation circuitry that stabilizes the control loop across its full 200–800kHz switching frequency range and load conditions - eliminating external resistors and capacitors from the feedback path.
How does the EBIAS pin function on RAA211820GSP#HA0?
The EBIAS pin on RAA211820GSP#HA0 accepts an external 3.3–40V bias source (e.g., VOUT). When EBIAS exceeds 3.1V, the device automatically switches from VIN-derived VCC to the EBIAS rail, reducing power dissipation and improving efficiency - especially beneficial in high-VIN, low-VOUT applications.
What is the soft-start behavior of RAA211820GSP#HA0?
RAA211820GSP#HA0 implements a fixed 0.5ms internal soft-start in its QFN package (GSP#HA0). During startup, the SS voltage ramps from 0V to 0.8V, controlling the error amplifier reference; PG asserts only after SS reaches 1.2V and FB is within regulation - preventing output overshoot without external components.
Can RAA211820GSP#HA0 operate safely under short-circuit conditions?
Yes, RAA211820GSP#HA0 provides dual overcurrent protection: cycle-by-cycle peak current limit (3.3A) and valley current limit (2.4A), plus output undervoltage hiccup mode. Under sustained short, it enters 23ms hiccup cycles - disabling switching until fault clears - protecting both IC and external components.
RAA211820GSP#HA0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 75V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 67.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 400kHz, 200kHz ~ 800kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
RAA211820GSP#HA0 FAQ
1.How can I place an order for RAA211820GSP#HA0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RAA211820GSP#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 RAA211820GSP#HA0 reliable?
The price and inventory of RAA211820GSP#HA0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RAA211820GSP#HA0 is usually 5 days.
3.What payment methods are accepted for RAA211820GSP#HA0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RAA211820GSP#HA0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RAA211820GSP#HA0?
RAA211820GSP#HA0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RAA211820GSP#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 RAA211820GSP#HA0?
For technical support, including RAA211820GSP#HA0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RAA211820GSP#HA0 requirements.
6.How does Aetrix verify that RAA211820GSP#HA0 is sourced from the original manufacturer or authorized distributors?
All RAA211820GSP#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 RAA211820GSP#HA0 meets industry standards.
7.What is the process for return or replacement of RAA211820GSP#HA0?
All RAA211820GSP#HA0 units undergo pre-shipment inspection (PSI). If there is an issue with RAA211820GSP#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 RAA211820GSP#HA0 part is unused and in its original packaging.
Return procedure for RAA211820GSP#HA0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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