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Renesas P9122-S0NBGI8
- Part No.:
- P9122-S0NBGI8
- Manufacturer:
- Renesas
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
P9122-S0NBGI8.pdf
- Description:
- IC REG BCK ADJ 2A/3A DL 24VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:3,053
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Product details
Overview
P9122-S0NBGI8 from Renesas Electronics (formerly IDT) is a dual-channel synchronous step-down power management IC with integrated high- and low-side MOSFETs, delivering 2A on Buck1 and 3A on Buck2 from a single 2.7V–5.5V input. It supports factory-programmable output voltages (0.8V–3.4V), 2MHz switching frequency, and configurable Buck/Switch mode for VOUT2 - enabling compact, high-efficiency point-of-load regulation in SSDs, portable gaming, and USB-powered systems.
For engineers reviewing the P9122-S0NBGI8 datasheet, P9122-S0NBGI8 pinout, P9122-S0NBGI8 application, or P9122-S0NBGI8 equivalent, key selection considerations include its dual-output programmability, VINSEL-configurable Buck2 operation mode, sleep-mode quiescent current (<1μA), thermal shutdown at 135°C, and QFN-24 4×4mm package with exposed pad for thermal management.
Technical Context
The P9122-S0NBGI8 integrates two independent buck regulators sharing a common VIN supply but with separate PVIN1/PVIN2 inputs and dedicated LX/PGND paths. Buck2's function is dynamically selected via VINSEL: logic low enables standard buck regulation (0.8V–3.4V), while logic high configures it as a switch-mode regulator sourcing from PVIN2 (2.7V–3.6V) with 3A capability.
Operation supports four OTP-configurable control modes: individual enable (Mode 0), master-enable sequencing (Mode 2), or master-enable with standby support (Mode 3). Power-good (PG) and power-on-reset (PORB) outputs are programmable via OTP, and soft-start ramp rates differ per channel (4–12 mV/μs for Buck1; 8–16 mV/μs for Buck2), ensuring controlled voltage ramp-up during power-on sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports direct connection to 3.3V or 5V system rails without pre-regulation |
| Buck1 Output Current | 2A continuous - sufficient for core logic or memory rails in embedded SSD controllers |
| Buck2 Output Current | 3A continuous in Buck mode; 2.4A in Switch mode - enables high-current I/O or interface rail generation |
| Switching Frequency | 2MHz ±5% - allows use of small 1μH inductors and reduces output ripple without compromising transient response |
| Output Voltage Range | 0.8V to 3.4V (factory-programmable in 25mV steps) - covers DDR, FPGA core, and peripheral I/O voltage requirements |
| Quiescent Current | <1μA in sleep mode - extends battery life in always-on portable applications |
| Operating Temperature | −40°C to +85°C ambient - qualified for industrial and consumer-grade embedded environments |
| Thermal Resistance θJA | 40°C/W - requires minimum 3×3 thermal vias under EP pad and 4-layer PCB for full 3A operation |
Pinout & Package
Package: QFN-24, 4mm × 4mm × 0.75mm body height, exposed thermal pad (EP) connected to ground plane. Pin pitch: 0.5mm. Moisture Sensitivity Level (MSL): 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 11, 13, EP | VGND / Exposed Pad | Primary analog/digital ground reference and thermal path - must be soldered to solid internal ground plane with ≥9 thermal vias |
| 2 | VREF | Internal reference output = VOUT1/2 - used for battery monitoring or comparator-based fault detection |
| 4 | VINSEL | Mode-select input - LOW configures Buck2 as buck regulator; HIGH configures as switch-mode regulator |
| 5 | DEVSLPIN | Sleep-mode enable - HIGH forces ultra-low-power state (<1μA IQ); LOW enables normal operation |
| 6, 18 | FB1 / FB2 | Feedback inputs - connect directly to output voltage dividers (not required due to OTP programming) or external resistive networks |
| 7, 20–21 | LX1 / LX2 | Switch-node outputs - drive external 1μH inductors; require tight layout with minimal loop area to reduce EMI |
| 9, 22–23 | PVIN1 / PVIN2 | High-current power inputs for each buck stage - require local 10μF ceramic bypass capacitors per rail |
| 10, 24 | VIN | IC core supply - powers internal logic and bias circuits; requires 2.2μF local bypass capacitor |
| 14–17 | GPIO14–GPIO17 | Configurable I/O pins - default as EN1, EN2, PORB, and PG2 in Mode 0; reassignable via OTP for sequencing or status reporting |
Key Features
| Feature | Design Value |
|---|---|
| Dual integrated FET buck regulators | Eliminates 4 external MOSFETs and associated gate drivers - reduces BOM count and PCB footprint by >30% |
| Factory-programmable output voltages | OTP-configured 0.8V–3.4V in 25mV steps - removes need for external resistor dividers and enables one-silicon-fits-many designs |
| Configurable Buck2 operating mode | VINSEL pin selects between buck regulation (for fixed-rail generation) or switch-mode operation (for efficient 3.3V-to-1.8V conversion) |
| Ultra-low sleep-mode IQ | <1μA quiescent current - enables multi-week battery standby in portable devices without external load switches |
| Programmable power sequencing | OTP-defined power-on/off order and delays (0.5ms–4ms) - ensures safe startup/shutdown of FPGAs, SoCs, and memory subsystems |
| Integrated thermal protection | 135°C junction shutdown with automatic recovery - prevents thermal runaway during overload or poor heatsinking conditions |
Applications
| Solid State Disk (SSD) Power Management | USB-Powered Portable Gaming |
|---|---|
Use Scenario: Regulating 1.2V NAND flash core and 1.8V I/O rails from a 5V USB input in M.2 or SATA SSD modules. IC Role / Device Role: Dual-output PMIC providing tightly regulated, sequenced, and monitored power domains for NAND controller and flash memory. Use Value: Enables single-chip solution replacing discrete DC-DC converters and sequencing ICs - reducing solution size by 45% and eliminating external timing components. |
Use Scenario: Powering ARM-based application processor (1.1V core), GPU (1.2V), and display interface (1.8V) from 5V USB-C input in handheld game consoles. IC Role / Device Role: Primary power management IC delivering two independent, programmable, and thermally robust output rails with sleep-mode support. Use Value: Achieves <1μA system standby current and 2MHz switching - allowing use of tiny 1μH inductors and extending play time per charge by up to 18%. |
| Set-Top Box / Smart TV Power Supply | Low-Power Industrial Controller |
Use Scenario: Generating 3.3V HDMI PHY and 1.2V video processor rails from a 5V intermediate bus in streaming media boxes. IC Role / Device Role: Secondary-stage point-of-load regulator with programmable sequencing and power-good signaling to SoC reset controller. Use Value: Supports optional 2MHz forced PWM mode - eliminating audible noise from inductor vibration during quiet viewing conditions. |
Use Scenario: Powering microcontroller (3.3V), RS-485 transceiver (5V derived via Buck2 Switch mode), and sensor interface (1.8V) in DIN-rail mounted IoT edge nodes. IC Role / Device Role: Compact, wide-temp PMIC supporting industrial ambient range (−40°C to +85°C) and robust ESD protection (±2kV HBM). Use Value: VINSEL-enabled Switch mode on Buck2 delivers 5V→3.3V conversion at >92% efficiency - avoiding need for third DC-DC stage and simplifying thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023BRSBR | Triple-output (3A/1.8A/1.8A), fixed 1.2V/1.5V/1.8V outputs; no VINSEL mode switching; 2.25MHz switching | Designed for OMAP3/DM365 processors - lacks programmable voltage and Buck/Switch flexibility | Choose when fixed-voltage, triple-rail support is needed and OTP configuration is unnecessary |
| RTQ2132B-QA | Dual 3A/3A outputs; 0.6V–3.6V adjustable via external resistors; no integrated OTP programming; AEC-Q100 Grade 2 | Automotive-qualified with enhanced ESD (±8kV HBM); requires external feedback resistors and sequencing IC | Choose for automotive infotainment where qualification and external adjustability outweigh programmability benefits |
Compared with TPS65023BRSBR and RTQ2132B-QA, the P9122-S0NBGI8 uniquely combines factory-programmable outputs, VINSEL-configurable Buck2 functionality, and sub-1μA sleep current - making it optimal for space-constrained, battery-sensitive consumer electronics requiring flexible, single-chip power architecture.
Availability
P9122-S0NBGI8 is available at Aetrix Electronics and suitable for solid-state disk drives, portable gaming hardware, and USB-powered set-top boxes requiring stable component supply across production lifecycles and rapid prototyping phases.
Supply support for P9122-S0NBGI8 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 Corporation is a global semiconductor leader formed from the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and timing solutions for automotive, industrial, and infrastructure markets.
The P9122-S0NBGI8 belongs to Renesas' legacy IDT power management portfolio, designed specifically for high-density, low-power point-of-load regulation in portable and embedded systems where integration, programmability, and thermal efficiency are critical.
FAQ
What is the function of the VINSEL pin on the P9122-S0NBGI8?
The VINSEL pin on the P9122-S0NBGI8 determines Buck2's operational mode: a logic LOW configures it as a standard synchronous buck regulator (0.8V–3.4V output), while a logic HIGH configures it as a switch-mode regulator sourcing from PVIN2 (2.7V–3.6V input) with 3A capability. This dual-mode flexibility allows the P9122-S0NBGI8 to serve both fixed-rail and intermediate-bus conversion needs without redesigning the power stage.
Does the P9122-S0NBGI8 require external feedback resistors to set output voltage?
No, the P9122-S0NBGI8 does not require external feedback resistors. Its output voltages are factory-programmed into OTP memory with 25mV granularity across 0.8V–3.4V. The FB1 and FB2 pins remain functional for optional external adjustment or monitoring but are not necessary for nominal operation - reducing component count and PCB area versus traditional resistor-based buck controllers.
What is the maximum continuous output current supported by each channel of the P9122-S0NBGI8?
The P9122-S0NBGI8 supports 2A continuous output current on Buck1 and 3A on Buck2 in buck mode (VINSEL = LOW), with derating based on junction temperature. In switch mode (VINSEL = HIGH), Buck2 delivers 2.4A continuous. These ratings assume proper thermal design: 4-layer PCB, 3×3 thermal vias under the EP pad, and ambient temperature ≤+85°C - exceeding typical requirements for SSD and portable gaming applications.
How does the P9122-S0NBGI8 manage power sequencing between its two outputs?
The P9122-S0NBGI8 supports programmable power sequencing via OTP configuration (Modes 2 and 3). Users define power-on/off order (e.g., Buck2 → Buck1), inter-rail delays (0.5ms–4ms), and fault responses. Sequencing is implemented internally - no external timers or supervisors needed. This capability ensures safe startup of SoCs and FPGAs, and is fully retained in the P9122-S0NBGI8 regardless of final customer OTP configuration.
What package type and thermal characteristics apply to the P9122-S0NBGI8?
The P9122-S0NBGI8 uses a QFN-24 4mm × 4mm × 0.75mm package with an exposed thermal pad (EP). Its thermal resistance is θJA = 40°C/W and ΨJB = 23°C/W. To sustain full 3A output on Buck2, the EP must be soldered to a solid ground plane using ≥9 thermal vias (0.3mm diameter, 0.8mm pitch), and the PCB must be at least 4-layer with internal copper planes - matching the validated layout in the official P9122-S0NBGI8 reference design.
P9122-S0NBGI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.4V
- Current - Output:
- 2A, 3A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VFQFPN (4x4)
P9122-S0NBGI8 FAQ
1.How can I place an order for P9122-S0NBGI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for P9122-S0NBGI8 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 P9122-S0NBGI8 reliable?
The price and inventory of P9122-S0NBGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P9122-S0NBGI8 is usually 5 days.
3.What payment methods are accepted for P9122-S0NBGI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P9122-S0NBGI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P9122-S0NBGI8?
P9122-S0NBGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P9122-S0NBGI8 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 P9122-S0NBGI8?
For technical support, including P9122-S0NBGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P9122-S0NBGI8 requirements.
6.How does Aetrix verify that P9122-S0NBGI8 is sourced from the original manufacturer or authorized distributors?
All P9122-S0NBGI8 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 P9122-S0NBGI8 meets industry standards.
7.What is the process for return or replacement of P9122-S0NBGI8?
All P9122-S0NBGI8 units undergo pre-shipment inspection (PSI). If there is an issue with P9122-S0NBGI8, 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 P9122-S0NBGI8 part is unused and in its original packaging.
Return procedure for P9122-S0NBGI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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