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NXP Semiconductors MC34VR500VCES
- Part No.:
- MC34VR500VCES
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
MC34VR500VCES.pdf
- Description:
- REGULATOR, BUCK, QUAD WITH UP TO
- Quantity:
- Payment:
- Shipping:
Inventory:4,124
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Product details
Overview
MC34VR500VCES 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), five LDOs, DDR reference generation, and I²C programmability - delivering complete system power for LS1046A-based networking equipment with precise sequencing and thermal protection.
For engineers reviewing the MC34VR500VCES datasheet, MC34VR500VCES pinout, MC34VR500VCES application, or MC34VR500VCES equivalent, this page provides verified technical context, validated pin functions, confirmed low-power mode behavior (Sleep: 122 μA typ), SW4 VTT disable configuration for LS1046A, and real-world design meaning of REFOUT, PORB, and thermal interrupt thresholds.
Technical Context
The MC34VR500VCES implements a fully integrated PMIC architecture with four synchronous buck converters sharing a common 2.0 MHz switching frequency (factory-programmed), independent voltage programming per regulator, and PFM/PWM/APS operating modes. Its power control logic includes dedicated processor interface signals (EN, STBY, PORB, INTB) and event-driven state transitions for coordinated startup and low-power entry.
Thermal management is hardware-protected via four programmable junction temperature thresholds (110°C–130°C) with hysteresis, while DDR support is implemented through REFOUT (10 mA, 0.6 V or 0.675 V selectable) and VHALF reference - though SW4 VTT tracking is explicitly disabled in the VCES variant per Table 1, distinguishing it from V1/V3/V4 variants.
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 without external pre-regulation |
| SW1 Output Current | 4.5 A - powers LS1046A core (VDD) with dynamic voltage scaling across 0.625 V–1.875 V range |
| SW4 Configuration | VTT disabled - eliminates DDR termination tracking; used for generic 1.0 A auxiliary rail (e.g., PCIe PHY, USB controller) |
| REFOUT Accuracy | ±1.5% over -40°C to +105°C - ensures stable DDR3L/DDR4 reference for memory subsystem compliance |
| Standby Current | 297 μA typical - enables low-power network standby in IoT gateways and wireless routers without disabling LDOs |
| I²C Interface | Standard-mode (100 kHz) and fast-mode (400 kHz) compatible - allows full register read/write for runtime voltage/frequency reconfiguration |
| Thermal Protection | 130°C shutdown threshold with 4°C hysteresis - prevents permanent damage during sustained high-load operation on 4-layer PCBs |
Pinout & Package
MC34VR500VCES uses a 56-pin QFN-EP (8 mm × 8 mm, 0.5 mm pitch) package with exposed thermal pad (EP). The package supports high-current routing and efficient heat dissipation via direct connection of EP to internal/external ground planes using multiple vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 56) | Enable input | Active-high logic signal; pull-up to VBIAS required if driven by open-drain processor GPIO; initiates full power-up sequence |
| PORB (Pin 3) | Open-drain reset output | Asserted low for 2–4 ms after all regulators stabilize; used to release LS1046A from hardware reset upon valid power rail establishment |
| INTB (Pin 1) | Open-drain interrupt output | Active-low fault indicator - asserts on thermal overload, overcurrent, or undervoltage; requires software-clear via I²C INTSENSE0 register |
| REFOUT (Pin 31) | DDR reference voltage output | Programmable 0.6 V (DDR4) or 0.675 V (DDR3L); 10 mA drive capability; bypassed with ≥1.0 μF capacitor at pin |
| VHALF (Pin 29) | Half-supply reference | Internal divider of REFOUT; used by LS1046A for DDR VTT generation when SW4 is disabled - critical for proper DDR bus termination |
| SGND1–SGND4 (Pins 14,15,32,48) | Signal ground returns | Dedicated ground pins per regulator domain - must be connected individually to PCB ground plane to prevent noise coupling between switching and analog sections |
Key Features
| Feature | Design Value |
|---|---|
| Four integrated buck regulators | Eliminates need for 4 external MOSFETs and controllers; SW1–SW4 share 2.0 MHz clock but support independent voltage/frequency tuning via I²C |
| Five programmable LDOs | LDO1 (250 mA, 0.8–1.55 V) powers LS1046A I/O; LDO2–LDO5 (100–350 mA, 1.8–3.3 V) supply peripherals like Ethernet PHY, USB, and PCIe |
| Processor-specific power sequencing | Factory-configured startup order (SW1→SW2→SW3→REFOUT→LDOs) matches LS1046A requirements; sequence adjustable via I²C registers |
| Multi-mode power control | Three user-selectable low-power states: OFF (17 μA), Sleep (122 μA), Standby (297 μA) - each with distinct regulator enable/disable and clock gating behavior |
| Hardware thermal protection | Four independent temperature thresholds (THERM110I–THERM130I) generate interrupts before shutdown; debounced 8 ms to reject transient spikes |
Applications
| LS1046A-Based Network Router | Industrial IoT Gateway |
|---|---|
Use Scenario: High-throughput Layer 3 routing with dual 10G Ethernet, SFP+, and PCIe expansion. IC Role / Device Role / Timing Role: Primary PMIC supplying core (SW1), I/O (LDO1), DDR reference (REFOUT), and peripheral rails (LDO2–LDO5) with synchronized startup and thermal monitoring. Use Value: Enables single-chip power solution for LS1046ARDB-PB reference design; SW4 disabled avoids unnecessary VTT complexity when DDR is not used in router control plane. |
Use Scenario: Edge gateway aggregating Modbus, CAN, and LoRaWAN sensors in harsh industrial environments. IC Role / Device Role / Timing Role: Power manager providing wide-temp (-40°C to +105°C) stable rails, low-quiescent Sleep mode for battery backup, and fault reporting via INTB to host MCU. Use Value: Reduces BOM count by integrating 9 regulators; REFOUT accuracy ensures reliable DDR3L operation in extended temperature ranges. |
| Secure Network Attached Storage | ATM Controller Board |
Use Scenario: Dual-CPU NAS with hardware encryption, SATA RAID, and 10GbE connectivity. IC Role / Device Role / Timing Role: Supplies LS1046A compute cluster and companion security accelerator; coordinates power-up timing between CPUs and crypto engines. Use Value: Programmable soft-start prevents inrush current during cold boot; SW3 (2.5 A) powers DDR4 memory subsystem with VHALF-referenced termination. |
Use Scenario: ATM mainboard requiring high reliability, tamper detection, and secure boot under continuous operation. IC Role / Device Role / Timing Role: Delivers fail-safe power with PORB-synchronized reset, thermal interrupts for fan control, and EN-driven graceful shutdown on AC loss. Use Value: 130°C thermal shutdown protects against enclosure overheating; I²C register locking prevents unauthorized voltage modification during secure boot. |
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 4-channel buck (3A/2A/2A/1.5A); no integrated LDOs or DDR reference; operates up to 125°C ambient | Requires external LDOs and DDR reference circuitry; suitable for automotive infotainment but lacks LS1046A-specific sequencing | Select when AEC-Q100 qualification is mandatory and DDR support is handled externally |
| TPS65283-1 | 3-channel buck (3A/2A/2A) + 3 LDOs; no DDR reference; I²C interface; 40-pin QFN | Lower integration (no SW4, fewer LDOs); lacks VHALF/REFOUT for DDR; supports only DDR3L via external circuit | Choose for cost-sensitive designs where LS1046A DDR is omitted and thermal thresholds are less stringent |
Compared with MPQ4436-AEC1 and TPS65283-1, MC34VR500VCES delivers higher integration (9 total outputs), LS1046A-optimized sequencing, and factory-configured VHALF/REFOUT for DDR - reducing layout complexity and validation effort in communications infrastructure designs.
Availability
MC34VR500VCES is available at Aetrix Electronics and suitable for LS1046A-based network routers, industrial IoT gateways, and secure NAS systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MC34VR500VCES 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 semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and communications markets.
The MC34VR500VCES belongs to NXP's QorIQ Power Management IC family, engineered to deliver tightly integrated, processor-matched power solutions for LS1/T1 series communications processors - minimizing external components and simplifying thermal and sequencing design.
FAQ
What is the key functional difference of MC34VR500VCES versus other MC34VR500 variants?
The MC34VR500VCES is specifically configured with SW4 VTT tracking disabled, making it ideal for LS1046A applications where DDR termination is handled externally or not required. Unlike V1/V3/V4 variants that enable SW4 for DDR3L/DDR4 VTT, the VCES variant repurposes SW4 as a general-purpose 1.0 A buck regulator - confirmed in Table 1 of the datasheet and validated by its assignment to LS1046ARDB-PB reference design.
How does MC34VR500VCES manage power sequencing for LS1046A?
The MC34VR500VCES implements factory-programmed startup sequencing matching LS1046A requirements: SW1 (core) powers first, followed by SW2/SW3 (I/O and DDR), then REFOUT and LDOs. This order is fixed in internal registers (Table 8) but can be modified via I²C. PORB asserts 2–4 ms after final regulator stabilizes, providing hardware reset release timing aligned with LS1046A specifications.
What thermal protection features does MC34VR500VCES provide?
The MC34VR500VCES includes four programmable thermal interrupt thresholds (110°C, 120°C, 125°C, 130°C) and a 130°C shutdown limit with 4°C hysteresis. These are monitored continuously and reported via INTB; the thermal protection is debounced for 8.0 ms to prevent false triggers. All thresholds are specified over -40°C to +105°C ambient and validated per JEDEC JESD51 standards.
Can MC34VR500VCES support both DDR3L and DDR4 memory interfaces?
Yes - MC34VR500VCES supports both DDR3L and DDR4 through programmable REFOUT (0.675 V ±1.5% for DDR3L; 0.6 V ±1.5% for DDR4) and VHALF reference. Since SW4 VTT is disabled in VCES, DDR termination relies on LS1046A's internal VTT generator referenced to VHALF, eliminating need for external tracking circuitry while maintaining JEDEC compliance.
What are the I²C voltage and timing requirements for configuring MC34VR500VCES?
The MC34VR500VCES supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C operation. SCL/SDA pins tolerate up to 3.6 V, with VCCI2C supply (Pin 55) requiring 1.7–3.6 V and 0.1 μF local decoupling. Input thresholds are 0.2×VCCI2C (low) and 0.8×VCCI2C (high); open-drain outputs drive to 0.4 V max at –2.0 mA load - ensuring robust communication with LS1046A's I²C controller.
MC34VR500VCES Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tray
- 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)
MC34VR500VCES FAQ
1.How can I place an order for MC34VR500VCES through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34VR500VCES 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 MC34VR500VCES reliable?
The price and inventory of MC34VR500VCES are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34VR500VCES is usually 5 days.
3.What payment methods are accepted for MC34VR500VCES?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34VR500VCES transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34VR500VCES?
MC34VR500VCES orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34VR500VCES 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 MC34VR500VCES?
For technical support, including MC34VR500VCES datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34VR500VCES requirements.
6.How does Aetrix verify that MC34VR500VCES is sourced from the original manufacturer or authorized distributors?
All MC34VR500VCES 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 MC34VR500VCES meets industry standards.
7.What is the process for return or replacement of MC34VR500VCES?
All MC34VR500VCES units undergo pre-shipment inspection (PSI). If there is an issue with MC34VR500VCES, 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 MC34VR500VCES part is unused and in its original packaging.
Return procedure for MC34VR500VCES:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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