My Inquiry
My Account
Renesas RAA211230
- Part No.:
- RAA211230
- Manufacturer:
- Renesas
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
RAA211230.pdf
- Description:
- IC REG BUCK ADJ 3A TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,986
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RAA211230 from Renesas Electronics is a 24V, 3A integrated synchronous buck regulator with Constant On-Time (COT) current mode control, featuring internal high-side (100 mΩ) and low-side (50 mΩ) MOSFETs, 0.768 V ±2% feedback reference, and 1 ms internal soft-start. It delivers regulated power in industrial I/O supplies and embedded systems requiring compact, efficient DC-DC conversion.
For engineers reviewing the RAA211230 datasheet, RAA211230 pinout, RAA211230 application, or RAA211230 equivalent, key selection criteria include EN rising threshold (1.29 V), VIN UVLO (4.45 V), output voltage programmability via FB divider, 6-lead TSOT23 package constraints, and hiccup-mode protection behavior under OUVP/OTP/LSOC faults.
Technical Context
The RAA211230 implements current-mode COT control with variable switching frequency (500 kHz typical at 1 A), minimum on-time of 70 ns, and minimum off-time of 250 ns. Its internal compensation eliminates external loop components while maintaining stability across 4.5–24 V input and 0.768–14 V output ranges.
Enable logic uses precise 1.29 V rising threshold with 0.1 V hysteresis and 2 kΩ pull-down resistance to GND; VIN UVLO has 4.45 V rising threshold and 360 mV hysteresis. Protection includes LSOC limit (2.55–3.5 A valley current), OUVP at 65% of VFB, and OTP at 170 °C with 20 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 24 V - supports wide industrial rail inputs including 12 V, 24 V, and 15 V systems without external pre-regulation. |
| Output Current | Up to 3 A continuous - sufficient for powering FPGA I/O banks, microcontroller cores, or sensor signal chains in space-constrained designs. |
| Feedback Reference | 0.768 V ±2% - enables accurate output voltage setting from 0.768 V to 14 V using standard resistor dividers; line regulation ±1%/V maintains accuracy across input transients. |
| Quiescent Current | 500 µA - minimizes standby power loss in always-on subsystems such as real-time clocks or wake-up controllers. |
| Shutdown Current | 1–10 µA - ensures ultra-low leakage during system sleep states, critical for battery-backed or energy-harvesting applications. |
| EN Threshold Voltage | 1.29 V rising, 0.7 V falling, 0.1 V hysteresis - allows precise sequencing control and programmable VIN UVLO via resistor divider without external comparators. |
| Thermal Shutdown | 170 °C junction temperature with 20 °C hysteresis - prevents thermal runaway during overload or poor PCB heatsinking while enabling automatic recovery. |
Pinout & Package
RAA211230 is housed in a 6-lead TSOT23 package (P6.064C), measuring 2.9 mm × 1.6 mm × 0.85 mm, with exposed thermal pad for enhanced thermal performance in high-power-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power and signal ground reference | Primary return path for all internal regulators, error amplifier, and protection circuits; must be connected to low-impedance PCB ground plane. |
| SW (Pin 2) | Switch node | Connects to inductor and bootstrap capacitor; carries high di/dt switching current; requires short, low-inductance routing to minimize EMI and voltage spikes. |
| VIN (Pin 3) | Main power input | Supplies IC bias and high-side gate drive; requires local 10 µF ceramic decoupling capacitor placed within 2 mm of pin. |
| FB (Pin 4) | Feedback input | Senses output voltage via resistive divider; internal 0.768 V reference sets VOUT = 0.768 × (1 + RFB1/RFB2); sensitive to noise-requires guard ring and short trace. |
| EN (Pin 5) | Enable control input | Logic-level shutdown control with 1.29 V rising threshold; 2 kΩ internal pull-down enables direct connection to microcontroller GPIO or resistor-divider programming of VIN UVLO. |
| BST (Pin 6) | Bootstrap supply | Drives high-side MOSFET gate; requires 0.1 µF X7R MLCC between BST and SW; capacitor must be placed adjacent to IC with minimal loop area. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | High-side (100 mΩ) and low-side (50 mΩ) MOSFETs eliminate external discrete FETs and drivers, reducing BOM count and layout complexity in 3 A buck designs. |
| Constant On-Time Control | Internal COT architecture with current-mode sensing provides fast transient response (<10 µs recovery from 0→3 A load step) and inherent stability without external compensation components. |
| Light-Load Efficiency | PFM mode automatically engages below ~200 mA load, reducing switching losses and maintaining >85% efficiency at 10 mA output current. |
| Hiccup-Mode Protection | OUVP, LSOC, and OTP faults trigger 1.25 ms on / 15 ms off hiccup timing-limits average power dissipation during sustained faults while enabling autonomous recovery. |
| Programmable UVLO | EN pin accuracy (±5%) and known threshold allow precise VIN UVLO setting via resistor divider (e.g., 12 V system with 9.5 V turn-on using REN1=100 kΩ, REN2=13.3 kΩ). |
Applications
| Industrial PLC I/O Module | Embedded Microcontroller Core Supply |
|---|---|
|
Use Scenario: Powering isolated digital I/O channels in programmable logic controllers operating from 24 V DC rails with strict thermal and size constraints. IC Role / Device Role / Timing Role: Primary 3.3 V/3 A buck regulator delivering stable core voltage to FPGA configuration logic and level-shifting buffers. Use Value: Integrated MOSFETs and 6-lead TSOT23 package reduce solution footprint by >40% versus discrete controller+FET solutions; COT control maintains <1% output deviation during 10 A/s load transients. |
Use Scenario: Generating 1.2 V or 1.8 V core supply for ARM Cortex-M7 microcontrollers in edge AI sensor nodes with battery backup requirements. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator supporting dynamic voltage scaling and deep-sleep modes. Use Value: 500 µA quiescent current and 1–10 µA shutdown current extend battery life; PFM mode sustains >88% efficiency at 50 mA load typical of idle MCU states. |
| Factory Automation Sensor Hub | Ruggedized HMI Display Backlight Driver |
|
Use Scenario: Powering multi-sensor fusion modules (temperature, vibration, current) mounted in high-EMI factory environments with wide ambient temperature swings (−40 °C to +85 °C). IC Role / Device Role / Timing Role: Main 5 V/2 A supply regulating output from 12–24 V field bus, with robust fault handling against cable shorts and ESD events. Use Value: LSOC protection limits peak fault current to ≤3.5 A; hiccup-mode operation prevents thermal damage during sustained 0 V output shorts; −40 °C to +125 °C junction rating ensures reliability across full industrial range. |
Use Scenario: Driving LED backlight arrays in industrial human-machine interface displays powered from 24 V vehicle or machinery batteries. IC Role / Device Role / Timing Role: Pre-regulator stepping 24 V down to 5 V or 8 V for downstream constant-current LED drivers. Use Value: 24 V absolute maximum input rating tolerates load-dump transients up to 26.5 V; 4.5–24 V operating range accommodates brownout conditions without dropout; 1 ms soft-start prevents inrush into large LED capacitor banks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z (Monolithic Power Systems) | 4.5–36 V input, 2 A output, external compensation required, no integrated BST capacitor support. | Lacks hiccup-mode OUVP and OTP; requires external overvoltage clamp for 24 V systems. | Choose when higher input voltage margin (>24 V) is needed and board area permits external compensation network. |
| TPS54302DDCR (Texas Instruments) | 4.5–28 V input, 3 A output, current-mode PWM (not COT), 1.5 ms soft-start, 1.22 V reference. | Slower transient response than COT; fixed 1.22 V reference limits low-VOUT flexibility without resistor scaling. | Prefer when design already uses TI's WEBENCH tools or requires tighter EMI control via adjustable switching frequency. |
Compared with MP2451DT-LF-Z and TPS54302DDCR, the RAA211230 offers superior light-load efficiency via PFM mode, faster transient response due to COT architecture, and integrated protection features (hiccup-mode OUVP/OTP/LSOC) that reduce system-level fault-handling complexity without external circuitry.
Availability
RAA211230 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, embedded microcontroller core supplies, and factory automation sensor hubs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for RAA211230 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 IoT markets.
The RAA211230 belongs to Renesas' Power Management IC portfolio designed specifically for high-efficiency, space-constrained DC-DC conversion in industrial and embedded applications where reliability, thermal robustness, and ease of design-in are critical.
FAQ
What is the recommended input capacitor for RAA211230 in a 12 V input application?
The RAA211230 datasheet specifies a 10 µF X7R ceramic capacitor (1206 case) placed directly between VIN and GND, located within 2 mm of the IC pins. This value ensures adequate high-frequency decoupling for the internal gate drivers and control circuitry, minimizing VIN ripple and preventing false UVLO triggering during load transients. For 12 V input, GMK316AB7106KL-TR is the validated part per the BOM table in the RAA211230 datasheet.
Does RAA211230 support adjustable output voltage, and how is it configured?
Yes, RAA211230 supports fully adjustable output voltage from 0.768 V to 14 V using an external resistor divider on the FB pin. The output is set by VOUT = 0.768 V × (1 + RFB1/RFB2), where RFB2 is typically 20 kΩ and RFB1 is selected per target VOUT (e.g., 65.9 kΩ for 3.3 V). The 0.768 V reference has ±2% accuracy over temperature, ensuring tight regulation without trimming.
How does the enable pin (EN) of RAA211230 behave during power sequencing?
The RAA211230 EN pin has a precise 1.29 V rising threshold and 0.7 V falling threshold with 0.1 V hysteresis, enabling reliable power sequencing. When EN rises above 1.29 V, the device initiates 1 ms soft-start; when EN falls below 0.7 V, it enters shutdown with ≤10 µA current draw. This allows clean turn-on/turn-off coordination with upstream controllers or voltage supervisors in multi-rail systems.
What protection features are built into RAA211230, and how do they respond to faults?
RAA211230 integrates Input UVLO, Low-Side Overcurrent (LSOC), Output Undervoltage (OUVP), and Over-Temperature (OTP) protection. LSOC halts high-side switching until current drops below 2.55–3.5 A; OUVP triggers hiccup mode (1.25 ms on / 15 ms off) when FB falls below 499 mV; OTP shuts down the IC at 170 °C and resumes after junction cools to 150 °C. All protections are internal and require no external components.
Can RAA211230 operate in forced continuous conduction mode (FCCM), or is it limited to COT operation?
RAA211230 operates exclusively in Constant On-Time (COT) current-mode control and does not support forced continuous conduction mode (FCCM). At light loads, it automatically transitions to pulse-frequency modulation (PFM) for improved efficiency; at heavier loads, switching frequency stabilizes near 500 kHz in CCM. No external pin or register configures FCCM-this is a fixed architectural feature of the RAA211230.
RAA211230 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tray
- 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):
- 24V
- Voltage - Output (Min/Fixed):
- 0.768V
- Voltage - Output (Max):
- 14V
- Current - Output:
- 3A
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
RAA211230 FAQ
1.How can I place an order for RAA211230 through Aetrix?
Please submit a Request for Quotation (RFQ) for RAA211230 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 RAA211230 reliable?
The price and inventory of RAA211230 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RAA211230 is usually 5 days.
3.What payment methods are accepted for RAA211230?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RAA211230 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RAA211230?
RAA211230 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RAA211230 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 RAA211230?
For technical support, including RAA211230 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RAA211230 requirements.
6.How does Aetrix verify that RAA211230 is sourced from the original manufacturer or authorized distributors?
All RAA211230 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 RAA211230 meets industry standards.
7.What is the process for return or replacement of RAA211230?
All RAA211230 units undergo pre-shipment inspection (PSI). If there is an issue with RAA211230, 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 RAA211230 part is unused and in its original packaging.
Return procedure for RAA211230:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RAA211230 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
