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Renesas RAA230231GSB#HA0
- Part No.:
- RAA230231GSB#HA0
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
RAA230231GSB#HA0.pdf
- Description:
- IC REG BUCK ADJ/3.3V DL 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,431
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Product details
Overview
RAA230231GSB#HA0 from Renesas Electronics is a dual synchronous step-down DC/DC converter IC with fixed 3.3V output on Channel 1 and adjustable 0.8V–6.0V output on Channel 2, supporting 4.5V–16V input, 3A per channel, 1.1MHz fixed switching frequency, and Auto PFM/PWM mode selection - deployed in industrial surveillance cameras and smart meter power rails.
For engineers reviewing the RAA230231GSB#HA0 datasheet, RAA230231GSB#HA0 pinout, RAA230231GSB#HA0 application, or RAA230231GSB#HA0 equivalent, key selection criteria include dual-channel independent enable control (EN1/EN2), integrated discharge circuit for rapid VOUT ramp-down, ±2.5% output voltage accuracy at fixed 3.3V, and HTSSOP-20 package thermal performance up to +85°C ambient.
Technical Context
The RAA230231GSB#HA0 implements two independent current-mode synchronous buck regulators sharing a common analog ground and internal 5.0V VREG rail. Each channel features dedicated high-side (180 mΩ) and low-side (130 mΩ) MOSFETs, fixed 2ms soft-start, and reverse-current detection enabling automatic PFM-to-PWM transition based on load current threshold.
Its protection architecture includes latch-type short-circuit protection triggered at FB < 0.35V, thermal shutdown at 165°C (auto-recovery), and UVLO with 3.9V turn-on / 3.7V turn-off hysteresis. The device lacks battery backup circuitry - distinguishing it from RAA23022x family members.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - supports wide-input industrial supplies including 12V nominal rails and 15V PoE-derived sources. |
| Output Channels | CH1: fixed 3.3V / CH2: 0.8V–6.0V adjustable - enables powering MCU cores (3.3V) and I/O peripherals (e.g., 5.0V sensors) from single IC. |
| Max Output Current | 3A per channel - sustains full-load operation under 85°C ambient with proper PCB copper and thermal pad layout. |
| Switching Frequency | 1.1MHz fixed - allows compact external LC filters (e.g., 2.2µH inductors) while avoiding AM radio band interference. |
| Shutdown Current | 1 µA typical - ensures ultra-low system standby power when both EN1 and EN2 are asserted low. |
| Output Accuracy | ±2.5% at fixed 3.3V output - meets tight regulation requirements for digital logic supply domains without trimming. |
| Soft Start Time | 2ms typical - limits inrush current during power-up, eliminating need for external timing components. |
Pinout & Package
RAA230231GSB#HA0 is housed in a 20-pin HTSSOP package (Renesas code PTSP0020JF-A) with exposed thermal pad connected to PGND. Pin functions are electrically identical to RAA23023x series as specified in Renesas R18DS0017EJ0100 (Pages 6–7).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND1, PGND2 (Pins 1, 20) | Power Ground Return | Separate high-current return paths for CH1 and CH2 minimize ground bounce coupling between channels. |
| LX1, LX2 (Pins 2, 19) | Switch Node | Direct connection to external inductors; requires low-inductance layout to suppress EMI and voltage spikes. |
| VIN1, VIN2 (Pins 4, 17) | Main Input Supply | Must be tied to same voltage source; decoupling capacitors ≥10µF required per input pin near device. |
| EN1, EN2 (Pins 13, 14) | Channel Enable Control | Active-high logic; no internal pull-down - must be hard-wired to GND or VIN to avoid floating state. |
| PGOOD (Pin 9) | Open-Drain Power-Good Signal | Indicates valid regulation on either channel; requires 100kΩ pull-up to VOUT1/VOUT2/VREG for sequencing. |
| FB1, FB2 (Pins 6, 15) | Feedback Input | Connects to resistor divider for CH2; CH1 uses internal 3.3V reference - FB1 left open for fixed output. |
Key Features
| Feature | Design Value |
|---|---|
| Auto PFM/PWM Mode Selection | x_AutoPFM pin configures automatic light-load PFM (high efficiency) or forced PWM (low noise) - critical for battery-backed or noise-sensitive systems. |
| Integrated Discharge Circuit | On-chip 100–200Ω discharge switches per channel rapidly collapse VOUT when EN deasserted - eliminates need for external MOSFETs and saves board space. |
| Synchronous Rectification | Internal high-side (180 mΩ) and low-side (130 mΩ) MOSFETs eliminate external diode losses - improves full-load efficiency by ~8% vs. asynchronous designs. |
| Independent Channel Control | Separate EN1/EN2 pins allow staggered startup, dynamic power gating, or fault isolation - essential for multi-rail sequencing in industrial controllers. |
| Thermal & Fault Protection | Latch-type SCP, auto-recovery TSD (165°C), and UVLO ensure robust operation under overload, overtemperature, or brownout conditions without external supervision. |
Applications
| Industrial Surveillance Camera | Smart Electricity Meter |
|---|---|
Use Scenario: Dual-rail power for image sensor (3.3V) and RF transceiver (5.0V) in outdoor IP camera with wide temperature range. IC Role / Device Role / Timing Role: Primary DC/DC regulator delivering stable, low-noise 3.3V and 5.0V from 12V PoE input; manages startup sequencing via PGOOD feedback. Use Value: Integrated discharge prevents residual charge on sensor rail during firmware reset; Auto PFM extends battery backup runtime during motion-triggered low-power mode. |
Use Scenario: Powering metrology ASIC (3.3V) and PLC interface (5.0V) in ANSI C12.22-compliant smart meter with tamper detection. IC Role / Device Role / Timing Role: Dual-output buck converter supplying isolated analog and digital domains; EN2 controlled by microcontroller for dynamic rail shutdown during sleep cycles. Use Value: ±2.5% output accuracy ensures ADC reference stability; 1.1MHz switching avoids interference with 50/60Hz line-cycle sampling. |
| Home Gateway Router | Building Security Controller |
Use Scenario: Compact power solution for Wi-Fi 6 SoC (3.3V core) and USB 3.0 PHY (5.0V) in space-constrained residential gateway. IC Role / Device Role / Timing Role: High-density dual-buck regulator replacing discrete solutions; PGOOD used to gate SoC reset until both rails stabilize. Use Value: HTSSOP-20 footprint reduces PCB area by 40% vs. two separate 3A converters; soft-start prevents inrush tripping upstream 5V/3A wall adapter. |
Use Scenario: Power management for access control panel with biometric reader (3.3V) and relay driver (5.0V) operating in unconditioned environments. IC Role / Device Role / Timing Role: Industrial-grade dual DC/DC providing fault-tolerant rails; thermal shutdown protects against enclosure overheating in summer deployments. Use Value: -40°C to +85°C operation ensures reliability in parking garage or rooftop enclosures; latch-type SCP prevents cascading failure during relay coil short. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel step-down DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54202HDDCR | Single-channel 2A converter; requires two units for dual-rail; 4.5–17V input; 0.8–6V adjustable only. | No integrated discharge circuit; no PGOOD; no independent EN control per channel. | Select when cost-per-amp is prioritized over integration and sequencing capability. |
| MP2451DT-LF-Z | Single-channel 0.6A converter; 3.3–36V input; fixed 3.3V or adjustable output; no second channel. | Lacks CH2, discharge, PGOOD, and thermal protection - requires supplemental ICs for full functionality. | Choose only for simple single-rail upgrades where board space allows discrete duplication. |
Compared with TPS54202HDDCR and MP2451DT-LF-Z, RAA230231GSB#HA0 delivers true dual-channel integration with coordinated protection, sequencing, and discharge - reducing BOM count by ≥3 components and eliminating inter-channel timing mismatches in safety-critical industrial designs.
Availability
RAA230231GSB#HA0 is available at Aetrix Electronics and suitable for industrial surveillance cameras, smart electricity meters, and home gateway routers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for RAA230231GSB#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 automotive, industrial, and IoT markets.
The RAA23023x product line delivers highly integrated dual-step-down DC/DC converters targeting space- and efficiency-constrained industrial and smart infrastructure applications - emphasizing thermal robustness, fault resilience, and simplified power-tree design.
FAQ
What is the maximum input voltage rating for RAA230231GSB#HA0?
The absolute maximum input voltage for RAA230231GSB#HA0 is +17.6V applied to VIN1 or VIN2 pins. However, the recommended operating range is strictly 4.5V to 16.0V per the datasheet's Recommended Operating Conditions table. Exceeding 16.0V may trigger UVLO shutdown or risk long-term reliability degradation, even if within absolute max ratings.
Does RAA230231GSB#HA0 include a battery backup function?
No, RAA230231GSB#HA0 does not include battery backup circuitry. It belongs to the RAA23023x series, which is explicitly defined as "Step-down only" in the Product Lineup Table (Page 2). Battery backup functionality is exclusive to the RAA23022x series (e.g., RAA230221), which feature VBB_IN and VBB_OUT pins - absent on RAA230231GSB#HA0.
How is the 3.3V output on Channel 1 configured in RAA230231GSB#HA0?
RAA230231GSB#HA0 has a factory-trimmed internal feedback network for Channel 1, delivering a fixed 3.3V output without external resistors. Pin FB1 (Pin 6) must remain unconnected (open), and VOUT1 (Pin 5) serves only as the regulated output node - unlike Channel 2, which requires an external R1/R2 divider for adjustable output.
What thermal management is required for RAA230231GSB#HA0 at full 3A load?
At 3A per channel and +85°C ambient, RAA230231GSB#HA0 requires the exposed thermal pad to be soldered to a minimum 100mm² copper pour connected to PGND. The datasheet specifies 3400mW total power dissipation at TA ≤ +25°C, derating by −34mW/°C above that - meaning thermal design must sustain junction temperature ≤ +125°C under worst-case load and airflow conditions.
Can RAA230231GSB#HA0 operate with independent input supplies on VIN1 and VIN2?
No. The datasheet explicitly states on Page 29: "Be sure to apply the same voltage to VIN1 pin and VIN2 pin." Using different voltages risks violating absolute maximum ratings, disrupting internal biasing, and causing unpredictable behavior - including premature UVLO activation or unstable regulation on one or both channels.
RAA230231GSB#HA0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V (3.3V)
- Voltage - Output (Max):
- 6V
- Current - Output:
- 3A
- Frequency - Switching:
- 1.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
RAA230231GSB#HA0 FAQ
1.How can I place an order for RAA230231GSB#HA0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RAA230231GSB#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 RAA230231GSB#HA0 reliable?
The price and inventory of RAA230231GSB#HA0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RAA230231GSB#HA0 is usually 5 days.
3.What payment methods are accepted for RAA230231GSB#HA0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RAA230231GSB#HA0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RAA230231GSB#HA0?
RAA230231GSB#HA0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RAA230231GSB#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 RAA230231GSB#HA0?
For technical support, including RAA230231GSB#HA0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RAA230231GSB#HA0 requirements.
6.How does Aetrix verify that RAA230231GSB#HA0 is sourced from the original manufacturer or authorized distributors?
All RAA230231GSB#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 RAA230231GSB#HA0 meets industry standards.
7.What is the process for return or replacement of RAA230231GSB#HA0?
All RAA230231GSB#HA0 units undergo pre-shipment inspection (PSI). If there is an issue with RAA230231GSB#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 RAA230231GSB#HA0 part is unused and in its original packaging.
Return procedure for RAA230231GSB#HA0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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