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Renesas RAA207702GBM#HC0
- Part No.:
- RAA207702GBM#HC0
- Manufacturer:
- Renesas
- Package:
- 20-WFBGA, CSPBGA
- Datasheet:
-
RAA207702GBM#HC0.pdf
- Description:
- IC REG BUCK ADJ 5A 20CSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,178
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Product details
Overview
RAA207702GBM from Renesas Electronics is a monolithic synchronous buck regulator with integrated high- and low-side power MOSFETs in a 20-pin CSP package (2.67 mm × 2.37 mm). It delivers up to 5 A continuous output current, supports 3 V–16 V input voltage, provides adjustable 0.8 V–5 V output, and features constant-on-time control for fast transient response in PC and server point-of-load applications.
For engineers reviewing the RAA207702GBM datasheet, RAA207702GBM pinout, RAA207702GBM application, or RAA207702GBM equivalent, key selection criteria include its 5 A output rating, 20-pin CSP footprint, built-in line switch driver, PGOOD indicator, and light-load efficiency optimization via Enhanced Light Load (ELL) mode.
Technical Context
The RAA207702GBM implements a voltage-ripple–based constant-on-time (COT) control architecture, where switching frequency varies inversely with input voltage to maintain stability across battery and adapter inputs. Its 1-shot timer sets high-side on-time (typ. 70–250 ns), while zero-current detection governs low-side conduction in light-load ELL mode.
It integrates dual functional blocks: a primary buck regulator with internal 5 A-rated MOSFETs and an independent high-drivability line switch driver (25 mA source/sink, 300 ns propagation delay) that operates regardless of regulator state-enabling Vout discharge, UVLO add-on, or discrete MOSFET gate drive without external drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 5 A continuous - matches RAA207702GBM's rated capacity for compact 12 V–1.2 V PoL conversion |
| Input Voltage Range | 3 V to 16 V - supports wide-range DC inputs including 5 V, 12 V, and 15 V rails in computing systems |
| Output Voltage Range | 0.8 V to 5 V - programmable via external resistor divider for CPU core, memory, or I/O rail regulation |
| Switching Frequency | Adjustable up to 2 MHz - enables small external inductors (e.g., 0.47 µH) and tight layout in space-constrained modules |
| Quiescent Current | 300 µA (typ.) at no load - sustains high efficiency down to microamp-level standby loads |
| Standby Current | 0.1 µA (typ.) - enables ultra-low-power shutdown for system-level energy management |
| OCP Threshold | 6.4 A to 9.6 A (peak inductor current) - provides margin above 5 A rating for transient overload tolerance |
| TSD Trip Point | 130°C to 150°C - thermal shutdown with 15°C hysteresis ensures safe recovery after overtemperature events |
Pinout & Package
CSP 20-pin package (2.67 mm × 2.37 mm), solder-bump mounted, Pb-free/halogen-free. Pin assignment is identical across RAA207700/01/02GBM variants per datasheet Rev.1.00 Page 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCIN | Controller supply input | +5 V dedicated bias rail; must be stable before VIN to satisfy startup sequence |
| SGND | Analog ground reference | Must be connected to PGND on PCB to minimize noise coupling into feedback path |
| FB | Feedback voltage input | Monitors output via resistor divider; internal 0.8 V reference sets Vout = 0.8 V × (1 + R1/R2) |
| LS_IN / LS_OUT | Line switch control / driver output | Independent 25 mA driver enabling fast Vout discharge or external MOSFET control without regulator dependency |
| BOOT | Bootstrap supply node | Supplies gate drive for high-side MOSFET; integrated SBD eliminates external diode requirement |
| SET | Constant-on-time programming | Resistor between SW and SET sets on-time (e.g., 30 kΩ → ~210 ns); determines CCM switching frequency |
| PGOOD | Open-drain power-good indicator | Pulls low during UVLO/OVP/OCP/TSD; delays 30% of soft-start period before asserting high impedance |
| SS | Soft-start timing capacitor | 2.5 µA current charges external cap to 0.8 V; soft-start duration = Css × 0.8 V / 2.5 µA |
| ON/OFF | Enable/disable control | Logic-high (>2.0 V) enables operation; slew rate > –5 V/µs required if driven by external controller |
| VIN / SW / PGND | Main power input / switching node / power ground | High-current paths requiring low-inductance layout; PGND must be solidly tied to SGND |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power MOSFETs | Optimized for 5 A output with low Rds(on), eliminating external FETs and gate drivers in PoL designs |
| Enhanced Light Load (ELL) Mode | Reduces IC bias current to improve efficiency below 100 mA load - critical for always-on system states |
| Built-in Bootstrapping Diode | Removes need for external bootstrap diode, simplifying layout and reducing BOM count in high-density boards |
| Programmable Soft Start | External capacitor sets ramp time - prevents inrush current and enables controlled sequencing with other rails |
| Independent Line Switch Driver | Drives external MOSFET gates directly (25 mA sink/source) - supports Vout discharge, UVLO add-on, or power gating |
| Power Good (PGOOD) with Delay | Indicates regulated output after 30% of soft-start time - enables reliable multi-rail sequencing in complex systems |
Applications
| Server DDR Memory Rail | Embedded CPU Core Supply |
|---|---|
Use Scenario: Regulating 1.2 V DDR4/DDR5 VDDQ rail in 1U rack servers with strict thermal and size constraints. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering up to 5 A with fast load-step response to meet JEDEC transient specs. Use Value: Integrated MOSFETs and 20-pin CSP reduce solution footprint by >40% vs. discrete controllers; ELL mode maintains >85% efficiency at 10 mA idle current. | Use Scenario: Providing 0.8–1.3 V core voltage to ARM-based SoCs in industrial gateways with variable workload profiles. IC Role / Device Role / Timing Role: Constant-on-time buck regulator ensuring sub-10 µs transient recovery during burst-mode CPU activity. Use Value: Adjustable switching frequency (up to 2 MHz) allows use of 0.47 µH inductors, cutting board area and cost versus 500 kHz solutions. |
| PC Motherboard Standby Rail | Network Switch ASIC Bias |
Use Scenario: Generating 3.3 V standby power for USB-C PD controllers and wake-on-LAN circuitry in ATX platforms. IC Role / Device Role / Timing Role: Always-on buck regulator operating in ELL mode with 0.1 µA shutdown current and remote ON/OFF control. Use Value: Ultra-low quiescent (300 µA) and standby (0.1 µA) currents extend platform battery life in mobile docking stations. | Use Scenario: Supplying 1.8 V bias to multi-gigabit Ethernet PHYs and packet processors in Layer 3 switches. IC Role / Device Role / Timing Role: High-efficiency PoL converter with PGOOD sequencing and line-switch–driven Vout discharge for hot-swap compliance. Use Value: Integrated LS driver discharges Vout in <10 ms upon ON/OFF deassertion - meets IEEE 802.3af/bt hot-swap safety 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 |
|---|---|---|---|
| RTQ2132BGQW | 4 A rated, 2.5 V–18 V input, 1.2 MHz fixed frequency, QFN-16 package (3 mm × 3 mm) | Lacks integrated line switch driver and ELL mode; requires external bootstrap diode | Choose when fixed-frequency operation and smaller package are prioritized over driver flexibility and ultra-light-load efficiency |
| TPS54560BQDDARQ1 | 5 A rated, 3.5 V–60 V input, adjustable frequency (100 kHz–2.5 MHz), SOIC-8 with exposed pad | Higher VIN range but larger footprint; no integrated line switch driver or PGOOD delay function | Choose for automotive 12 V/24 V systems requiring extended input range and AEC-Q100 qualification |
Compared with RTQ2132BGQW and TPS54560BQDDARQ1, the RAA207702GBM uniquely combines 5 A capability in a 20-pin CSP with an independent line switch driver and ELL-optimized quiescent current - making it optimal for space-constrained, multi-function PoL designs in computing infrastructure.
Availability
RAA207702GBM is available at Aetrix Electronics and suitable for server DDR memory rails, embedded CPU core supplies, and PC standby power applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for RAA207702GBM 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 SoC solutions for automotive, industrial, and datacenter markets.
The RAA207700 series targets high-density point-of-load regulation in computing platforms, emphasizing integration (MOSFETs, boot diode, line driver), efficiency across load ranges, and design simplicity for server and client motherboard applications.
FAQ
What is the maximum continuous output current supported by the RAA207702GBM?
The RAA207702GBM supports up to 5 A continuous output current, as specified in the Recommended Operating Conditions table (Page 5). This rating applies under typical thermal conditions using the recommended PCB layout with thermal vias. Peak inductor current OCP threshold is 6.4–9.6 A, providing headroom for transient loads. The RAA207702GBM is the 5 A variant within the RAA207700 family, distinct from the 10 A (RAA207701GBM) and 15 A (RAA207700GBM) versions.
Does the RAA207702GBM require an external bootstrap diode?
No, the RAA207702GBM integrates a bootstrap diode internally, as confirmed in the Features list (Page 1) and Pin Description (Page 3). The BOOT pin is designed to be connected directly to the SW node and a ceramic capacitor (e.g., 0.1 µF/25 V), eliminating the need for an external discrete diode. This reduces component count, PCB area, and potential failure points in high-reliability server and embedded applications.
How does the RAA207702GBM achieve high efficiency at light loads?
The RAA207702GBM achieves high light-load efficiency through its Enhanced Light Load (ELL) mode, which automatically reduces internal bias current to ~300 µA (typ.) and enables diode-emulation operation. As described on Page 13, ELL mode activates when load drops below a threshold, minimizing switching losses and gate drive consumption. This results in >85% efficiency at 10 mA output - critical for standby and low-power states in modern computing platforms.
Can the RAA207702GBM drive an external MOSFET for power sequencing?
Yes, the RAA207702GBM includes a dedicated line switch driver with LS_IN and LS_OUT pins capable of sourcing/sinking 25 mA (Page 6). As shown in Application Examples (Pages 13–14), this driver can directly control external N-channel MOSFET gates for functions like Vout discharge, UVLO add-on, or power rail enable/disable - all independently of the main buck regulator's operational state.
What is the recommended startup sequence for the RAA207702GBM?
The RAA207702GBM requires VIN to be present before VCIN and ON/OFF signals rise, as detailed in the Start-up Sequence section (Page 15). Specifically, "VIN to VCIN & ON/OFF" is the only guaranteed-safe sequence; violating this (e.g., powering VCIN first) may prevent startup. This constraint arises from the absence of VIN UVLO and the need for stable input voltage to bias internal circuits before control activation.
RAA207702GBM#HC0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-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:
- 5A
- Frequency - Switching:
- Up to 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-CSP (2.67x2.37)
RAA207702GBM#HC0 FAQ
1.How can I place an order for RAA207702GBM#HC0 through Aetrix?
Please submit a Request for Quotation (RFQ) for RAA207702GBM#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 RAA207702GBM#HC0 reliable?
The price and inventory of RAA207702GBM#HC0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RAA207702GBM#HC0 is usually 5 days.
3.What payment methods are accepted for RAA207702GBM#HC0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RAA207702GBM#HC0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RAA207702GBM#HC0?
RAA207702GBM#HC0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RAA207702GBM#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 RAA207702GBM#HC0?
For technical support, including RAA207702GBM#HC0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RAA207702GBM#HC0 requirements.
6.How does Aetrix verify that RAA207702GBM#HC0 is sourced from the original manufacturer or authorized distributors?
All RAA207702GBM#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 RAA207702GBM#HC0 meets industry standards.
7.What is the process for return or replacement of RAA207702GBM#HC0?
All RAA207702GBM#HC0 units undergo pre-shipment inspection (PSI). If there is an issue with RAA207702GBM#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 RAA207702GBM#HC0 part is unused and in its original packaging.
Return procedure for RAA207702GBM#HC0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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