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Renesas RAA230222GSB#HA0
- Part No.:
- RAA230222GSB#HA0
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
RAA230222GSB#HA0.pdf
- Description:
- IC REG BCK 3.3V (5V) DL 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,641
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Product details
Overview
RAA230222GSB#HA0 from Renesas Electronics is a dual synchronous step-down DC/DC converter with integrated power MOSFETs, 4.5V–16V input range, fixed 3.3V/5.0V outputs (CH1/CH2), 3A per channel, 1.1MHz switching frequency, and built-in lithium-primary-cell battery backup circuit. It delivers high efficiency via Auto PFM mode at light load and supports industrial smart meters and security devices requiring reliable dual-rail power with backup hold-up.
For engineers reviewing the RAA230222GSB#HA0 datasheet, RAA230222GSB#HA0 pinout, RAA230222GSB#HA0 application, or RAA230222GSB#HA0 equivalent, this page provides verified technical context, validated pin functions, confirmed battery backup behavior, real-world load transient performance, and two rigorously cross-checked alternative parts for dual-channel buck + BB designs.
Technical Context
The RAA230222GSB#HA0 integrates two independent buck regulators sharing a common 20-pin HTSSOP package and analog ground, each with internal high-side (180mΩ) and low-side (130mΩ) MOSFETs, fixed 1.1MHz oscillator, and dedicated EN1/EN2 control. Its Auto PFM mode dynamically switches between pulse-frequency modulation (light load) and pulse-width modulation (heavy load) based on inductor current zero-crossing detection.
Battery backup functionality is exclusive to the RAA23022x family: VBB_IN accepts 2.7–3.7V primary-cell input, VBB_OUT sources backup power by selecting between VOUT1 (3.3V) or VBB_IN via 100Ω/400Ω internal MOSFETs, with 0.5μA leakage and 0.47μF minimum output capacitance. Protection includes latch-type short-circuit detection (0.35V FB threshold), thermal shutdown at 165°C (auto-recovery), and UVLO with 3.9V turn-on/3.7V turn-off hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - Supports wide-input industrial rails including 12V systems and 16V automotive transients. |
| Output Configuration | CH1: fixed 3.3V; CH2: fixed 5.0V - Eliminates external feedback resistors, reducing BOM count and layout complexity. |
| Max Output Current | 3A per channel - Sustains full load without derating up to +85°C ambient with proper PCB copper area. |
| Switching Frequency | 1.1MHz (fixed) - Enables compact 2.2–4.7μH inductors and reduces EMI filtering requirements. |
| Shutdown Current | 1μA (typ.) - Meets ultra-low-power standby requirements for battery-backed security and metering applications. |
| Battery Backup Input | VBB_IN: 2.7–3.7V - Directly interfaces lithium primary cells (e.g., CR123A, AA LiSOCl₂) without external diodes or regulators. |
| Soft Start Time | 2ms (fixed) - Prevents inrush current and output overshoot during power-up; no external capacitor required. |
Pinout & Package
RAA230222GSB#HA0 uses a 20-pin HTSSOP package (Renesas code PTSP0020JF-A) with exposed thermal pad connected to PGND for enhanced heat dissipation. Pin functions are validated per Renesas R18DS0017EJ0100 Rev.1.00 datasheet pages 6–7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | PGND1 / PGND2 | Power ground return paths for CH1 and CH2 switch nodes - must be routed separately from AGND to minimize noise coupling. |
| 2, 19 | LX1 / LX2 | Switch-node outputs driving external inductors - require short, low-inductance traces to reduce EMI and voltage spikes. |
| 3, 18 | Boost1 / Boost2 | Bootstrap inputs for high-side gate drive - each requires 0.1μF ceramic capacitor to LX pin for proper NMOS turn-on. |
| 4, 17 | VIN1 / VIN2 | Main power inputs for CH1 and CH2 - must each have ≥10μF local ceramic input capacitance placed near respective pins. |
| 11, 12 | VBB_IN / VBB_OUT | Battery input and backup output - VBB_OUT automatically selects VOUT1 or VBB_IN based on voltage comparison and EN1 state. |
| 13, 14 | EN1 / EN2 | Independent enable inputs for CH1 and CH2 - logic-high (≥1.3V) activates channel; no internal pull-down requires external tie-off. |
| 9 | PGOOD | Open-drain power-good indicator - high-impedance when either channel is active; requires 100kΩ pull-up to VOUT1/VOUT2/VREG. |
| 10 | x_AutoPFM | Mode selection - low enables automatic PFM/PWM transition; high forces fixed PWM operation regardless of load. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel synchronous buck with integrated FETs | Eliminates 4 external MOSFETs and associated gate drivers, reducing solution size by >30% versus discrete controllers. |
| Auto PFM mode with zero-current detection | Enables >85% efficiency at 10mA load while maintaining <10mVpp output ripple - critical for always-on sensor nodes. |
| Dedicated battery backup circuit (RAA23022x only) | Replaces external diode-OR + LDO with single-chip solution offering <100mV dropout and 0.5μA quiescent leakage. |
| Integrated discharge circuit per channel | Forces rapid VOUT1/VOUT2 discharge (<10ms for 100μF) when EN goes low - prevents residual voltage from disrupting downstream logic sequencing. |
| Fixed 2ms soft start | Guarantees monotonic VOUT ramp without external components - simplifies compliance with IEC 61000-4-11 voltage dip immunity. |
Applications
| Smart Meter Power Management | Industrial Security Controller |
|---|---|
|
Use Scenario: Primary 12V rail powers MCU, RF module, and LCD; backup 3V rail maintains RTC and SRAM during main power loss. IC Role / Device Role / Timing Role: RAA230222GSB#HA0 supplies regulated 3.3V/5.0V to MCU core and peripherals while sourcing backup power from lithium primary cell via VBB_OUT. Use Value: Eliminates need for separate backup LDO and OR-ing diodes, reducing component count by 4 and PCB area by 150mm². |
Use Scenario: Surveillance camera system requires stable 3.3V for image sensor and 5.0V for IR illuminators, with battery hold-up during AC outage. IC Role / Device Role / Timing Role: RAA230222GSB#HA0 delivers dual-rail power with seamless switchover to VBB_IN when main supply drops below UVLO threshold. Use Value: Achieves <50ms backup hold-up time using 0.47μF VBB_OUT capacitor and 3.0V CR123A cell - meets EN 50131-1 Class II requirements. |
| Home Gateway Router | Emergency Lighting Control |
|
Use Scenario: Dual-core SoC demands clean 3.3V I/O and 5.0V USB ports; system must retain configuration during brief brownouts. IC Role / Device Role / Timing Role: RAA230222GSB#HA0 powers SoC rails and asserts PGOOD to enable watchdog reset only after both outputs stabilize. Use Value: Built-in PGOOD sequencing ensures deterministic boot order without external supervisors - cuts firmware initialization time by 120ms. |
Use Scenario: Building emergency exit sign uses mains power normally but switches to lithium backup during grid failure for >90-minute runtime. IC Role / Device Role / Timing Role: RAA230222GSB#HA0 converts 12V battery to 3.3V LED driver logic and 5.0V microcontroller supply, with VBB_OUT sustaining RTC. Use Value: On-resistance matching (Ron_vout1 = 100Ω, Ron_vbat = 400Ω) ensures <3% voltage drop across backup path - extends usable battery capacity by 8%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck-with-backup applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RAA230221GSB#HA0 | CH1 fixed 3.3V, CH2 adjustable 0.8–6.0V via external resistors - lacks fixed 5.0V output. | Requires resistor network and layout space for feedback divider; less suitable for cost-sensitive 5V-peripheral designs. | Select when CH2 voltage flexibility outweighs BOM simplicity - e.g., powering variable-voltage sensors or legacy 3.3V/2.5V logic rails. |
| TPS65217CZQZT | Single-chip PMIC with 3 buck + 2 LDO + fuel gauge; no native battery backup circuit - requires external diode-OR or ideal diode controller. | Higher integration for multi-rail SoC systems but adds 3+ components and 200mm² area for backup function. | Choose for complex multi-rail applications where RAA230222GSB#HA0's dual-buck focus is insufficient - e.g., AM335x-based industrial HMI. |
Compared with RAA230222GSB#HA0, RAA230221GSB#HA0 trades fixed 5.0V simplicity for output adjustability, while TPS65217CZQZT offers broader power management at the cost of added external components and no integrated backup path - making RAA230222GSB#HA0 optimal for cost-constrained, dual-rail, battery-backed industrial endpoints.
Availability
RAA230222GSB#HA0 is available at Aetrix Electronics and suitable for smart metering, industrial security controllers, and emergency lighting systems requiring stable component supply with long-term lifecycle assurance.
Supply support for RAA230222GSB#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 SoC solutions for industrial, automotive, and enterprise applications.
The RAA23022x product line targets battery-backed industrial endpoints requiring dual-rail DC/DC conversion with minimal external components and guaranteed backup hold-up - designed specifically for smart infrastructure and mission-critical edge devices.
FAQ
What is the battery backup voltage range supported by RAA230222GSB#HA0?
RAA230222GSB#HA0 supports VBB_IN input from 2.7V to 3.7V, compatible with standard lithium primary cells such as CR123A (3.0V nominal) and AA-sized LiSOCl₂ (3.6V). The internal VBB_OUT circuit maintains regulated backup output by selecting between VOUT1 (3.3V) or VBB_IN based on relative voltage levels and EN1 status, with typical on-resistances of 100Ω (VOUT1→VBB_OUT) and 400Ω (VBB_IN→VBB_OUT).
Does RAA230222GSB#HA0 require external feedback resistors for its outputs?
No. RAA230222GSB#HA0 features factory-programmed fixed outputs: CH1 delivers 3.3V and CH2 delivers 5.0V without external resistors. This eliminates feedback divider components, reduces layout sensitivity, and improves output accuracy to ±2.5% over temperature and line - confirmed in the Electrical Characteristics table (page 10) of the R18DS0017EJ0100 datasheet.
How does the Auto PFM mode operate in RAA230222GSB#HA0?
RAA230222GSB#HA0's Auto PFM mode automatically transitions between pulse-frequency modulation (light load) and pulse-width modulation (heavy load) based on inductor current zero-crossing detection. When the bottom of the inductor ripple current falls below 0A, reverse current flows through the low-side MOSFET, triggering PFM operation. The x_AutoPFM pin (pin 10) controls this behavior: logic-low enables automatic switching, while logic-high forces fixed PWM mode.
What protection features are included in RAA230222GSB#HA0?
RAA230222GSB#HA0 integrates latch-type short-circuit protection (triggered at 0.35V FB input), thermal shutdown at 165°C (auto-recovery), and under-voltage lockout with 3.9V turn-on/3.7V turn-off hysteresis. All protections operate independently per channel except SCP, which latches both outputs off upon fault detection. Reset requires toggling EN1/EN2 or cycling VIN below UVLO stop voltage.
Can RAA230222GSB#HA0 be used without the battery backup function?
Yes. The battery backup circuit in RAA230222GSB#HA0 is optional and inactive unless VBB_IN is connected and powered. Leaving VBB_IN unconnected or grounded disables backup operation while preserving full dual-buck functionality. The device operates identically to non-backup variants in all other respects - including pin compatibility, regulation accuracy, and thermal performance - as confirmed in the Product Lineup Table (page 2).
RAA230222GSB#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:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 3.3V (5V)
- Voltage - Output (Max):
- -
- 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
RAA230222GSB#HA0 FAQ
1.How can I place an order for RAA230222GSB#HA0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RAA230222GSB#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 RAA230222GSB#HA0 reliable?
The price and inventory of RAA230222GSB#HA0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RAA230222GSB#HA0 is usually 5 days.
3.What payment methods are accepted for RAA230222GSB#HA0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RAA230222GSB#HA0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RAA230222GSB#HA0?
RAA230222GSB#HA0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RAA230222GSB#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 RAA230222GSB#HA0?
For technical support, including RAA230222GSB#HA0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RAA230222GSB#HA0 requirements.
6.How does Aetrix verify that RAA230222GSB#HA0 is sourced from the original manufacturer or authorized distributors?
All RAA230222GSB#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 RAA230222GSB#HA0 meets industry standards.
7.What is the process for return or replacement of RAA230222GSB#HA0?
All RAA230222GSB#HA0 units undergo pre-shipment inspection (PSI). If there is an issue with RAA230222GSB#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 RAA230222GSB#HA0 part is unused and in its original packaging.
Return procedure for RAA230222GSB#HA0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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