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Renesas RAA207704GBM#HC0
- Part No.:
- RAA207704GBM#HC0
- Manufacturer:
- Renesas
- Package:
- 30-WFBGA, CSPBGA
- Datasheet:
-
RAA207704GBM#HC0.pdf
- Description:
- IC REG BUCK ADJ 10A 30CSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,975
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Product details
Overview
RAA207704GBM from Renesas Electronics is a monolithic synchronous buck regulator with integrated high- and low-side power MOSFETs in a 30-pin CSP package (2.67 mm × 3.37 mm), delivering up to 10 A continuous output current, 0.8–5.0 V adjustable output voltage, and constant-on-time control architecture for fast transient response in PC and server point-of-load applications.
For engineers reviewing the RAA207704GBM datasheet, RAA207704GBM pinout, RAA207704GBM application, or RAA207704GBM equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and protection specifications, and real-world design constraints including ELL mode efficiency optimization, BOOT resistor selection (2.0 Ω at 12 V), and FB ripple stability criteria for MLCC-based output stages.
Technical Context
The RAA207704GBM implements a voltage-ripple–based constant-on-time (COT) control architecture where switching frequency is dynamically adjusted via external SET resistor to maintain near-constant fSW across input voltage changes; minimum on-time is fixed at 70 ns (typ.), limiting maximum switching frequency to ~2 MHz depending on VIN and VOUT.
It integrates an internal 5 V LDO (4.5–5.5 V output, ±5% tolerance) with selectable enable via LDO_EN# pin, supports dual supply modes (internal LDO or external 5 V), and features diode-emulation light-load operation (ELL mode) with <550 µA AVIN quiescent current and built-in bootstrapping diode for high-side gate drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 10 A continuous - rated for sustained high-current PoL conversion in CPU/GPU VRMs without external current sensing. |
| Input Voltage Range | 3.0–16 V - supports wide-input industrial and server rails; internal LDO enables single-supply operation from 5.5–16 V. |
| Output Voltage Range | 0.8–5.0 V - programmable via external resistor divider on FB pin; reference voltage is 800 mV ±1%. |
| Switching Frequency | Adjustable up to 2 MHz - set by external SET resistor; COT architecture ensures stable loop behavior with minimal external compensation. |
| OCP Threshold | 14.0 A (typ.) - fixed overcurrent protection trip level, triggering hiccup-mode recovery after fault detection. |
| Thermal Shutdown | 150°C trip / 135°C hysteresis - non-latched TSD with automatic soft-start restart upon cooling. |
| Efficiency (12 V→1.2 V) | 94% at 10 A - measured under CCM, no airflow, using 0.47 µH inductor and 5×47 µF POSCAP output capacitors. |
Pinout & Package
RAA207704GBM uses a 30-pin CSP (Chip Scale Package) measuring 2.67 mm × 3.37 mm with solder bumps; thermal resistance θj-a = 33°C/W on reference board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V5_OUT | Controller supply output | 5 V LDO output; powers internal logic and can supply external bias if LDO_EN# = "L" or open. |
| SGND | Analog ground reference | Must be connected to PGND on PCB; separates analog control circuitry from high-current power return path. |
| FB | Feedback voltage input | Monitors output via resistor divider; comparator threshold is 800 mV ±1%; ripple injection required for MLCC stability. |
| LDO_EN# | 5 V LDO enable control | Active-low; "L" or open enables internal LDO; "H" disables it and requires external 5 V on V5_OUT. |
| AVIN | Analog input supply | Must connect to VIN; supplies bias for control circuitry; UVLO threshold is 4.3 V (start) / 3.8 V (CCM shutdown). |
| BOOT | Bootstrap capacitor node | Supplies gate drive for high-side MOSFET; integrated SBD eliminates external bootstrap diode; RBOOT = 2.0 Ω recommended at 12 V. |
| SET | Constant-on-time programming | Resistor between SW and SET sets tON; e.g., 30 kΩ yields ~210 ns at VIN = 12 V, VOUT = 1.2 V. |
| PGOOD | Power-good indicator | Open-drain output pulled low during UVLO/OVP/OCP/TSD; asserts high-impedance after 30% of soft-start period when FB ≥ 0.72 V. |
| SS | Soft-start timing | Capacitor from SS to SGND sets ramp time: TSS = CSS × 0.8 V / 2.5 µA; prevents reverse current during pre-bias start-up. |
| ON/OFF | Operation enable/disable | Active-high; "H" ≥2.0 V enables regulation; slew rate > –5 V/µs required if driven externally to avoid noise-induced malfunction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power MOSFETs | Low RDS(on) high- and low-side FETs eliminate external switch selection and layout complexity for 10 A PoL designs. |
| Constant-On-Time Control | Enables ultra-fast load transient response (<10 µs recovery) without loop compensation components; frequency scales with VIN/VOUT ratio. |
| Enhanced Light Load (ELL) Mode | Reduces AVIN quiescent current to 550 µA max and switches to diode emulation, improving efficiency below 1 A without audible noise. |
| Built-in Bootstrapping Diode | Removes need for external bootstrap diode; simplifies layout and improves reliability in high-density server VRMs. |
| Programmable Soft Start | External capacitor on SS pin allows precise control of inrush current and sequencing in multi-rail systems (e.g., CPU core + I/O rails). |
| Comprehensive Protection Suite | Includes OCP (hiccup), OVP (latched), UVLO, TSD (non-latched), and PGOOD monitoring - all implemented internally with no external components. |
Applications
| Server CPU Core VRM | AI Accelerator Board Power |
|---|---|
Use Scenario: Delivering tightly regulated 0.8–1.2 V at up to 10 A to high-performance x86 or Arm-based server CPUs with dynamic load steps exceeding 5 A/µs. IC Role / Device Role / Timing Role: Primary synchronous buck controller with integrated FETs, handling full power conversion and transient response without external drivers or current sense. Use Value: Eliminates discrete driver + MOSFET stage, reduces BOM count by ≥6 components, and achieves >94% peak efficiency at 10 A with minimal footprint (2.67 × 3.37 mm). |
Use Scenario: Powering FPGA or ASIC fabric on AI training accelerators requiring fast, stable 1.0–1.8 V rails with strict voltage accuracy (±1%) and sequencing control. IC Role / Device Role / Timing Role: Point-of-load regulator with programmable soft-start (SS pin) and PGOOD signaling for coordinated rail bring-up with memory and interface supplies. Use Value: Enables precise startup timing via external capacitor, supports multi-phase synchronization via ON/OFF pin, and maintains ±1% output accuracy across –40°C to +125°C junction temperature. |
| Industrial Edge Compute Module | High-Density Telecom PSU |
Use Scenario: Providing robust 3.3 V or 5.0 V power to ARM-based edge compute modules operating in extended temperature environments (–40°C to +85°C ambient). IC Role / Device Role / Timing Role: Single-chip buck solution with internal LDO and wide 3.0–16 V input range, supporting unregulated 12 V or 48 V intermediate bus conversion. Use Value: Delivers 10 A output from 12 V input with 33°C/W thermal resistance, enabling convection-cooled designs without heatsinks in space-constrained enclosures. |
Use Scenario: Serving as secondary-stage regulator in telecom rectifier modules converting 54 V intermediate bus to 12 V or 5 V for baseband processing units. IC Role / Device Role / Timing Role: High-efficiency, high-reliability buck converter with non-latched thermal shutdown and 150°C TSD trip for continuous operation under high ambient loads. Use Value: Achieves >92% efficiency at 10 A/12 V output while maintaining <150°C junction temperature under full load and natural convection, reducing system cooling requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315GQ-Z (Monolithic Power Systems) | 8 A rated, 4.5–24 V input, fixed 500 kHz fSW, no internal LDO, requires external bootstrap diode. | Lower current rating and no integrated LDO limit use in single-supply server PoL; better suited for cost-sensitive industrial 5 V rails. | Select MP2315GQ-Z only when 8 A suffices and external 5 V bias is available; not drop-in due to different pinout and missing LDO_EN# and AVIN pins. |
| TPS546D24RVR (Texas Instruments) | 15 A rated, 3.0–18 V input, PMBus-enabled, 3.3 mm × 4.5 mm QFN, includes telemetry and digital configuration. | Supports digital power management and telemetry but requires PMBus host; larger footprint and higher BOM cost than RAA207704GBM. | Choose TPS546D24RVR when digital monitoring, margining, or dynamic voltage scaling is required; not pin-compatible and demands firmware integration. |
Compared with MP2315GQ-Z and TPS546D24RVR, the RAA207704GBM uniquely combines 10 A capability, internal 5 V LDO, 30-pin CSP footprint (2.67 × 3.37 mm), and ELL-mode efficiency in a single analog IC-making it optimal for space-constrained, single-supply server and AI board designs where digital overhead is unnecessary.
Availability
RAA207704GBM is available at Aetrix Electronics and suitable for server CPU VRMs, AI accelerator boards, industrial edge compute modules, and high-density telecom power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for RAA207704GBM 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 timing solutions for automotive, industrial, and datacenter applications.
The RAA20770x family was designed specifically for high-current, space-constrained point-of-load regulation in servers and AI hardware-emphasizing integration (MOSFETs + LDO), thermal performance, and analog simplicity over digital configurability.
FAQ
What is the maximum supported switching frequency for RAA207704GBM?
The RAA207704GBM supports switching frequencies up to 2 MHz, limited by its 70 ns minimum on-time and 50 ns minimum off-time. Actual achievable frequency depends on VIN, VOUT, and the external SET resistor value per the equation: tON = (50 pF × 1 V / (VIN – 2.0 V)) × RSET + 60 ns. For example, with RSET = 10 kΩ and VIN = 12 V, tON ≈ 110 ns, yielding ~1.1 MHz at VOUT = 1.2 V. The RAA207704GBM datasheet confirms 2 MHz as the upper bound under optimized conditions.
Does RAA207704GBM require an external bootstrap diode?
No, the RAA207704GBM integrates a bootstrap diode (SBD) internally, eliminating the need for an external component. This is explicitly stated in the datasheet's "Features" section and confirmed in the "BOOT" pin description: "To be supplied +5 V through integrated SBD." However, a series BOOT resistor (recommended 2.0 Ω at VIN = 12 V) is required to suppress SW node voltage spikes, as detailed in Page 16 of the R07DS0892EJ0100 datasheet for the RAA207704GBM.
How is output voltage accuracy maintained with low-ESR MLCC output capacitors on RAA207704GBM?
The RAA207704GBM requires external ripple injection for stable operation with MLCCs because its constant-on-time control relies on sufficient FB pin ripple (>15 mV). A network of Rf, Cf, and Cr injects controlled ripple derived from inductor DCR voltage. Per Page 15, recommended values are Cf = 0.01 µF, Cr = 1000 pF, and Rf calculated to yield 15–20 mV ripple. Without this, subharmonic oscillation occurs. The RAA207704GBM's FB comparator reference remains 800 mV ±1%, but effective VFB shifts with injected ripple, requiring adjusted feedback resistors per Equation (14).
What is the purpose of the AVIN pin on RAA207704GBM, and how must it be connected?
The AVIN pin supplies bias current to the RAA207704GBM's analog control circuitry and has a dedicated UVLO threshold (4.3 V start, 3.8 V shutdown in CCM). It must be connected directly to the VIN net on the PCB, as stated in the Pin Description table (Page 3): "Should be connected to VIN on PCB pattern." Failure to tie AVIN to VIN causes improper startup or erratic regulation. Unlike V5_OUT or LDO_EN#, AVIN has no enable function-it is a mandatory supply connection, not a control signal.
Can RAA207704GBM operate without the internal 5 V LDO enabled?
Yes, the RAA207704GBM can operate with the internal 5 V LDO disabled by driving LDO_EN# high ("H"), which requires an external 5 V supply applied to the V5_OUT pin. In this mode, the chip draws controller power from the external source instead of the internal LDO. The truth table on Page 4 confirms: "LDO_EN# = H → LDO disable." This configuration is used when system-level power sequencing mandates external 5 V availability before VIN, or when higher LDO current capability is needed beyond the internal regulator's limits.
RAA207704GBM#HC0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 30-WFBGA, CSPBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 10A
- Frequency - Switching:
- Up to 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 30-CSP (2.67x3.37)
RAA207704GBM#HC0 FAQ
1.How can I place an order for RAA207704GBM#HC0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RAA207704GBM#HC0 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 RAA207704GBM#HC0 reliable?
The price and inventory of RAA207704GBM#HC0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RAA207704GBM#HC0 is usually 5 days.
3.What payment methods are accepted for RAA207704GBM#HC0?
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4.How is shipping managed for RAA207704GBM#HC0?
RAA207704GBM#HC0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RAA207704GBM#HC0 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 RAA207704GBM#HC0?
For technical support, including RAA207704GBM#HC0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RAA207704GBM#HC0 requirements.
6.How does Aetrix verify that RAA207704GBM#HC0 is sourced from the original manufacturer or authorized distributors?
All RAA207704GBM#HC0 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 RAA207704GBM#HC0 meets industry standards.
7.What is the process for return or replacement of RAA207704GBM#HC0?
All RAA207704GBM#HC0 units undergo pre-shipment inspection (PSI). If there is an issue with RAA207704GBM#HC0, 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 RAA207704GBM#HC0 part is unused and in its original packaging.
Return procedure for RAA207704GBM#HC0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RAA207704GBM#HC0 Tags
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