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NXP Semiconductors MC34VR500VCESR2
- Part No.:
- MC34VR500VCESR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
MC34VR500VCESR2.pdf
- Description:
- REGULATOR, BUCK, QUAD WITH UP TO
- Quantity:
- Payment:
- Shipping:
Inventory:2,291
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Product details
Overview
MC34VR500VCESR2 from NXP Semiconductors is a multi-output DC/DC power management IC designed specifically for QorIQ LS1/T1 communication processors. It integrates four buck regulators (SW1: 4.5 A, SW2: 2.0 A, SW3: 2.5 A, SW4: 1.0 A in VTT mode), five LDOs, DDR reference generation (REFOUT), and I²C programmability - delivering complete system power for LS1046A-based networking equipment including Ethernet, HDMI, and DDR memory subsystems.
For engineers reviewing the MC34VR500VCESR2 datasheet, MC34VR500VCESR2 pinout, MC34VR500VCESR2 application, or MC34VR500VCESR2 equivalent, key selection criteria include its factory-configured SW4 VTT disable state for LS1046A platforms, 56-pin QFN-EP (8×8 mm) package with exposed thermal pad, -40 °C to +105 °C operating range, and I²C-controlled dynamic voltage scaling across all regulators.
Technical Context
The MC34VR500VCESR2 implements a SMARTMOS-based PMIC architecture with integrated high-side and low-side power MOSFETs per buck stage, enabling full regulation without external switches. Its power control logic includes processor interface signals (EN, STBY, PORB, INTB) and event-driven sequencing, supporting startup, standby, sleep, and off modes with configurable timing via internal registers.
It features dual clock sources: a trimmed 16 MHz RC oscillator (±8%) for active-mode operation and an untrimmed 32 kHz RC oscillator for ultra-low-power states. Thermal protection includes four programmable thresholds (110–130 °C) with hysteresis, and fault reporting via open-drain INTB with maskable interrupts for overcurrent, short-circuit, and thermal events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 4.5 V - supports single-cell Li-ion or regulated 3.3 V supply rails common in communications processors |
| SW1 Output Current | 4.5 A - powers CPU core (VDDC) of LS1046A at up to 1.2 V with PFM/PWM mode switching |
| SW4 Mode | VTT disabled - configured for non-DDR termination use, freeing SW4 as general-purpose 1.0 A buck regulator |
| LDO1 Output Range | 0.80 V to 1.55 V / 250 mA - supplies processor I/O or auxiliary logic requiring precise low-voltage bias |
| I²C Interface | Standard-mode (100 kHz) and fast-mode (400 kHz) compatible - enables real-time voltage, sequence, and fault register access |
| Operating Temp | -40 °C to +105 °C - qualified for industrial and networking equipment deployed in uncontrolled environments |
| Thermal Protection | Four thresholds (110/120/125/130 °C) with 2–4 °C hysteresis - prevents thermal runaway during sustained high-load operation |
Pinout & Package
MC34VR500VCESR2 uses a 56-pin QFN-EP (8 mm × 8 mm, 0.5 mm pitch) with exposed thermal pad (EP). The package supports high-current routing and efficient heat dissipation via PCB vias to inner/external ground planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Active-high logic signal controlling global power-up; pull-up to VBIAS (8–100 kΩ) required if not driven by processor |
| PORB | Open-drain reset output | Asserted low after all regulators stabilize (2–4 ms delay); used to release LS1046A from hardware reset |
| INTB | Open-drain interrupt output | Signals faults (OCP, thermal, UVLO); requires external pull-up to VCCI2C or VVIN for proper logic level |
| STBY | Standby mode input | Processor-controlled entry into low-power standby; polarity configurable via STBYINV bit in I²C register |
| REFOUT | DDR reference output | 10 mA buffered reference for DDR3L/DDR4 VREF; disabled in VTT-disabled variants like MC34VR500VCESR2 |
| EP | Exposed thermal pad | Ground return path for all buck regulators; must be connected to PCB ground plane with ≥4 thermal vias for RθJB = 10 °C/W |
Key Features
| Feature | Design Value |
|---|---|
| Programmable regulator sequencing | Per-regulator start order (1–12) and inter-rail delay (1 ms steps) controlled via I²C, enabling safe power-up of LS1046A's complex voltage domain dependencies |
| VTT tracking disable | SW4 operates as independent 1.0 A buck (0.625–1.975 V), not tied to SW3 - simplifies design when DDR termination is handled externally or not required |
| Multi-mode regulation | Each buck supports PWM (fixed-frequency), PFM (light-load efficiency), and APS (adaptive phase-shift) - optimizing efficiency across 0.1–100% load range |
| Factory-configured defaults | Pre-programmed startup voltages (e.g., SW1 = 0.7 V, SW2 = 1.35 V, SW3 = 1.8 V) and sequencing (SW1/SW2 first, REFOUT last) tailored for LS1046A RDB-PB reference design |
| Integrated thermal sensing | On-die temperature monitoring with four user-selectable interrupt thresholds and automatic shutdown above 130–150 °C - eliminates need for external thermal ICs |
Applications
| LS1046A-Based Network Router | Industrial Edge Gateway |
|---|---|
Use Scenario: High-throughput Layer 3 routing with dual 10G Ethernet, SFP+, and PCIe interfaces. IC Role / Device Role / Timing Role: MC34VR500VCESR2 delivers sequenced, I²C-adjustable rails for LS1046A core (VDDC), I/O (VDD), DDR4 memory (VDDQ, VPP), and peripheral PHYs. Use Value: Eliminates discrete regulator count by >70%; factory-configured SW4 disable avoids unnecessary VTT circuitry, reducing BOM cost and layout area. | Use Scenario: Secure, fanless edge gateway aggregating Modbus, CAN, and cellular (LTE-M) data in harsh factory environments. IC Role / Device Role / Timing Role: MC34VR500VCESR2 supplies processor, isolated RS-485 transceivers, and LTE modem with thermal-aware sequencing and fault reporting. Use Value: -40 °C to +105 °C rating and robust thermal shutdown ensure continuous operation; I²C telemetry enables predictive maintenance via temperature/fault logging. |
| Telecom Access Point | Network-Attached Storage Controller |
Use Scenario: Dual-band Wi-Fi 6E AP with integrated 2.5G Ethernet switch and USB 3.0 host controller. IC Role / Device Role / Timing Role: MC34VR500VCESR2 powers LS1046A SoC, Wi-Fi radio LDOs (LDO2/LDO3), and Ethernet PHYs (LDO4/LDO5) with independent soft-start control. Use Value: Programmable soft-start prevents inrush current on hot-plug PoE connections; PFM mode extends uptime in battery-backed backup scenarios. | Use Scenario: 4-bay NAS with SATA III, USB 3.2 Gen 2x2, and 2.5G Ethernet - requiring low-noise, stable power for HDD/SSD controllers. IC Role / Device Role / Timing Role: MC34VR500VCESR2 provides clean, ripple-free LDO outputs (LDO1–LDO5) for storage controller I/O, PHYs, and USB transceivers. Use Value: Low-noise LDOs (<10 µV RMS) prevent data corruption; REFOUT disable avoids interference with external DDR4 termination ICs used in high-density memory configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436-AEC1 | Automotive-grade quad-buck (4×3 A), no integrated LDOs or DDR reference; requires external LDOs and VREF IC | Designed for ADAS camera modules, not communications processors; lacks LS1/T1-specific sequencing and I²C register map | Select only if automotive AEC-Q100 qualification is mandatory and DDR support is handled externally |
| TPS65283-1 | Dual-buck (2×3 A) + triple-LDO PMIC; no DDR reference, no VTT mode, limited I²C register set | Targeted at ARM Cortex-A8/A9 embedded systems; lacks LS1046A-specific startup configuration and thermal interrupt granularity | Choose for simpler SoCs without DDR4 or complex rail sequencing; not drop-in for LS1046A designs |
Compared with MPQ4436-AEC1 and TPS65283-1, MC34VR500VCESR2 uniquely integrates LS1046A-optimized sequencing, VTT-disable capability, DDR reference generation, and comprehensive thermal/fault telemetry - making it the only solution that matches the QorIQ platform's power architecture without external component additions.
Availability
MC34VR500VCESR2 is available at Aetrix Electronics and suitable for network routers, industrial gateways, telecom access points, and NAS controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC34VR500VCESR2 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
NXP Semiconductors is a global leader in secure connectivity solutions for automotive, industrial, and communications markets, with deep expertise in power management for high-performance processors.
The MC34VR500VCESR2 belongs to NXP's QorIQ Power Management IC family, engineered specifically to simplify power delivery for LS1/T1 series communications processors - reducing design risk, board space, and time-to-market for networking infrastructure.
FAQ
What is the default SW4 configuration for MC34VR500VCESR2?
The MC34VR500VCESR2 is factory-configured with SW4 VTT mode disabled, as confirmed in Table 1 (Orderable Parts) of the datasheet. This allows SW4 to operate as a standard 1.0 A buck regulator (0.625–1.975 V output), rather than a DDR termination tracker. This setting is fixed at manufacture and cannot be changed via I²C.
Which processor families is MC34VR500VCESR2 validated for?
MC34VR500VCESR2 is validated for the NXP QorIQ LS1046A processor, as explicitly stated in the Orderable Parts table (Notes column for MC34VR500VCESR2) and supported by the LS1046ARDB-PB reference design. It is not qualified for LS102x or LS1088A families without revalidation.
Does MC34VR500VCESR2 include DDR4 VREF generation?
No, MC34VR500VCESR2 does not enable REFOUT by default. Per Table 8 (Start-up Configuration), REFOUT_SEQ = "-" for variant VC, indicating the DDR reference output is disabled at power-on. REFOUT can be enabled via I²C register write only if external DDR4 termination is required.
What thermal protection features does MC34VR500VCESR2 provide?
MC34VR500VCESR2 includes four programmable thermal interrupt thresholds (THERM110I, THERM120I, THERM125I, THERM130I) with 2–4 °C hysteresis, plus a hard thermal shutdown at 130–150 °C. These are monitored continuously and reported via INTB; threshold values are read from INTSENSE0 register bits.
How is the startup sequence controlled on MC34VR500VCESR2?
The MC34VR500VCESR2 startup sequence is factory-programmed into internal registers (e.g., SW1_SEQ = 1, SW2_SEQ = 1, SW3_SEQ = 1, SW4_SEQ = 5 per Table 8). After power-on, the sequence can be modified in real time via I²C writes to the SEQ_CLK_SPEED, XX_SEQ, and XX_VOLT registers - enabling dynamic reconfiguration during runtime.
MC34VR500VCESR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Processor
- Current - Supply:
- 297µA
- Voltage - Supply:
- 2.8V ~ 4.5V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 56-QFN-EP (8x8)
MC34VR500VCESR2 FAQ
1.How can I place an order for MC34VR500VCESR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34VR500VCESR2 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 MC34VR500VCESR2 reliable?
The price and inventory of MC34VR500VCESR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34VR500VCESR2 is usually 5 days.
3.What payment methods are accepted for MC34VR500VCESR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34VR500VCESR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34VR500VCESR2?
MC34VR500VCESR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34VR500VCESR2 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 MC34VR500VCESR2?
For technical support, including MC34VR500VCESR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34VR500VCESR2 requirements.
6.How does Aetrix verify that MC34VR500VCESR2 is sourced from the original manufacturer or authorized distributors?
All MC34VR500VCESR2 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 MC34VR500VCESR2 meets industry standards.
7.What is the process for return or replacement of MC34VR500VCESR2?
All MC34VR500VCESR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC34VR500VCESR2, 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 MC34VR500VCESR2 part is unused and in its original packaging.
Return procedure for MC34VR500VCESR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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