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NXP Semiconductors MC34VR500V4ESR2
- Part No.:
- MC34VR500V4ESR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
MC34VR500V4ESR2.pdf
- Description:
- REGULATOR BUCK QUAD WITH UP TO
- Quantity:
- Payment:
- Shipping:
Inventory:1,812
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Product details
Overview
MC34VR500V4ESR2 from NXP Semiconductors is a multi-output DC/DC power management IC designed specifically for QorIQ LS1/T1 communication processors, integrating four buck regulators (SW1: 4.5 A, SW2: 2.0 A, SW3: 2.5 A, SW4: 1.0 A VTT-tracking), five LDOs, DDR3L/DDR4 reference generation, and I²C programmability. It powers the full system-including processor core, DDR memory, and peripherals-in IoT gateways and network-attached storage.
For engineers reviewing the MC34VR500V4ESR2 datasheet, MC34VR500V4ESR2 pinout, MC34VR500V4ESR2 application, or MC34VR500V4ESR2 equivalent, key selection considerations include its LS1043/LS1023A processor support, factory-configured VTT tracking mode for DDR4 (0.6 V), 56-pin QFN-EP 8×8 mm package, and I²C-controlled dynamic voltage scaling across all regulators.
Technical Context
The MC34VR500V4ESR2 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 dedicated processor interface signals (EN, STBY, PORB, INTB) and event-driven sequencing aligned to LS1/T1 boot requirements.
It features dual clock domains: a trimmed 16 MHz RC oscillator for active-mode timing and regulation control, and a 32 kHz untrimmed oscillator for ultra-low-power sleep states. Thermal protection thresholds (110–130 °C) are monitored via internal die sensors with hysteresis and debounced interrupt outputs.
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 pre-regulation |
| SW1 Output Current | 4.5 A - delivers core voltage to LS1043A processor at up to 1.5 V with PFM/PWM mode switching |
| SW4 Function | VTT tracking regulator - generates DDR4 termination voltage at exactly 50% of SW3 output (0.6 V nominal) |
| LDO Count & Types | Five independent LDOs - LDO1 (250 mA, 0.8–1.55 V), LDO2–LDO5 (100–350 mA, 1.8–3.3 V) for I/O, PHY, and auxiliary rails |
| I²C Interface | Standard-mode (100 kHz) and fast-mode (400 kHz) compatible - enables real-time voltage, sequence, and fault register access |
| Thermal Protection | Four programmable thresholds (110/120/125/130 °C) with 2–4 °C hysteresis - triggers interrupt before shutdown at 140 °C junction |
| Package | 56-pin QFN-EP, 8 mm × 8 mm, 0.5 mm pitch - exposed thermal pad enables ≤10 °C/W junction-to-board thermal resistance |
Pinout & Package
MC34VR500V4ESR2 is housed in a 56-pin QFN-EP (8 mm × 8 mm, 0.5 mm pitch) with an exposed thermal pad (EP) connected to ground for enhanced thermal dissipation. Pin functions are validated per NXP Document Number MC34VR500 Rev. 12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 56) | Enable input | Active-high logic signal; pull-up to VBIAS required if not driven by processor - initiates full start-up sequence |
| PORB (Pin 3) | Power-on reset output | Open-drain, active-low signal asserted 2–4 ms after final regulator enables - used to release processor from reset |
| INTB (Pin 1) | Fault interrupt output | Open-drain, active-low signal indicating overcurrent, thermal, or UVLO fault - requires software-clear via I²C INTSENSE0 register |
| STBY (Pin 4) | Standby mode control | Processor-driven input that places PMIC into low-quiescent-current standby (297 μA typ.) while maintaining all rail outputs |
| SCL/SDA (Pins 54/53) | I²C interface | Standard bidirectional I²C bus - supports configuration, monitoring, and dynamic voltage scaling of all regulators and LDOs |
| EP (Exposed Pad) | Thermal & ground return | Must be soldered to inner/outer ground planes via ≥6 vias - primary path for buck regulator current return and heat conduction |
Key Features
| Feature | Design Value |
|---|---|
| VTT tracking for DDR4 | SW4 automatically tracks 50% of SW3 output voltage - eliminates need for external resistor divider or feedback compensation in DDR4 systems |
| Factory-programmed startup | Preconfigured for LS1043A/LS1023A with SW1=1.5 V, SW2=1.8 V, SW3=1.2 V, SW4=VTT, LDO2=2.5 V, LDO3=2.5 V, LDO4=1.8 V, LDO5=3.3 V |
| Multi-mode regulation | Each buck supports PWM (fixed-frequency), PFM (light-load efficiency), and APS (adaptive phase-shift) - optimizes efficiency across 0–100% load range |
| DDR reference generation | REFOUT provides stable 0.6 V (DDR4) or 0.675 V (DDR3L) reference with 10 mA drive - directly interfaces DDR VREF pins without external buffer |
| Low-power state management | Three user-selectable modes: OFF (17 μA), Sleep (122 μA), Standby (297 μA) - each maintains different regulator/LDO subsets active for rapid wake-up |
Applications
| IoT Gateway Power Management | Mobile Wireless Router |
|---|---|
Use Scenario: Compact, fanless edge gateway aggregating Zigbee, BLE, and Wi-Fi traffic with LS1023A processor and DDR3L memory. IC Role / Device Role / Timing Role: MC34VR500V4ESR2 supplies core (1.5 V), I/O (3.3 V), DDR3L (1.35 V + 0.675 V VTT), and PHY rails with synchronized startup and thermal monitoring. Use Value: Eliminates discrete regulator count by >70%, reduces BOM cost by consolidating 9 power rails into one IC with factory-tuned sequencing. |
Use Scenario: Battery-powered portable router using LS1043A, dual-band Wi-Fi, and LTE modem requiring dynamic power scaling during data bursts. IC Role / Device Role / Timing Role: MC34VR500V4ESR2 delivers core (1.5 V), DDR4 (1.2 V + 0.6 V VTT), and peripheral rails while enabling PFM→PWM transition on SW1/SW2 during transmit events. Use Value: Achieves <12 mW quiescent power in Sleep mode and <250 mW in Standby - extends battery life without compromising boot reliability. |
| Network-Attached Storage | Industrial MFP Printer |
Use Scenario: Dual-core NAS platform with LS1043A, SATA controllers, USB 3.0, and DDR4 memory operating in temperature-controlled enclosures. IC Role / Device Role / Timing Role: MC34VR500V4ESR2 powers processor, DDR4 (1.2 V + 0.6 V), SATA PHY (3.3 V), and USB controller (1.8 V) with thermal throttling at 125 °C junction. Use Value: Integrated thermal interrupts (THERM125I) enable graceful CPU frequency reduction before shutdown - prevents data corruption during sustained write loads. |
Use Scenario: Multifunction printer with LS1021A, image sensor, motor drivers, and Ethernet PHY operating in ambient temperatures up to 60 °C. IC Role / Device Role / Timing Role: MC34VR500V4ESR2 supplies processor core (1.0 V), DDR3L (1.35 V + 0.675 V VTT), sensor bias (2.5 V), and motor control logic (3.3 V) with precise sequencing. Use Value: Factory-programmed LDO2/LDO3/LDO4 sequence (2/2/1) ensures sensor and motor power stabilize before imaging firmware execution begins. |
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 (3 A/2 A/2 A/1.5 A); no integrated LDOs or DDR reference; requires external VTT solution | Targeted at automotive ADAS, not communications processors; lacks I²C programmability and LS1/T1-specific sequencing | Select only if automotive qualification (AEC-Q100 Grade 1) and higher SW1 current (3 A vs. 4.5 A) outweigh loss of DDR support and processor interface logic |
| TPS65270 | Dual-buck (3 A/2 A) + triple-LDO PMIC; no VTT tracking; fixed 1.2 MHz switching; no thermal interrupt outputs | Designed for ARM Cortex-A8/A9 SoCs (e.g., AM335x), not QorIQ; lacks DDR4 reference and processor-specific PORB/STBY signaling | Choose only for legacy TI-based designs where I²C configurability and DDR4 compliance are non-critical and cost is primary constraint |
Compared with MPQ4436-AEC1 and TPS65270, the MC34VR500V4ESR2 uniquely integrates VTT tracking, DDR4 reference generation, LS1043A-optimized factory sequencing, and dedicated processor interface signals-making it irreplaceable for QorIQ-based communications platforms without redesigning power architecture.
Availability
MC34VR500V4ESR2 is available at Aetrix Electronics and suitable for IoT gateways, mobile wireless routers, and network-attached storage systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for industrial deployments.
Supply support for MC34VR500V4ESR2 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, with deep expertise in power management for high-performance processors.
The MC34VR500V4ESR2 belongs to NXP's QorIQ Power Management IC family, engineered specifically to simplify power delivery for LS1/T1 series communications processors-reducing design risk, layout complexity, and time-to-market for networking infrastructure.
FAQ
What is the default VTT tracking behavior of the MC34VR500V4ESR2?
The MC34VR500V4ESR2 is factory-configured for DDR4 VTT operation: SW4 automatically tracks 50% of SW3's output voltage, delivering 0.6 V when SW3 is set to 1.2 V. This behavior is hard-coded in the startup registers (SW4_VOLT = VTT, SW4_SEQ = 12) and requires no I²C initialization to function. The MC34VR500V4ESR2 does not support DDR3L VTT (0.675 V) unless reprogrammed via I²C to disable tracking and set SW4 to fixed 0.675 V.
Which processor families does the MC34VR500V4ESR2 support out-of-the-box?
The MC34VR500V4ESR2 is pre-configured for LS1043A and LS1023A processors per Table 1 of the datasheet, with matching startup voltages (SW1 = 1.5 V, SW2 = 1.8 V, SW3 = 1.2 V), sequencing order, and DDR4 VTT tracking. It also supports LS1046A and LS1028A when reprogrammed via I²C, but LS1043A/LS1023A are the only families with factory-aligned settings for immediate use without register modification.
How does the MC34VR500V4ESR2 handle thermal protection during sustained high-load operation?
The MC34VR500V4ESR2 monitors die temperature continuously and asserts THERM125I interrupt at 125 °C (typical) with 2–4 °C hysteresis. If temperature reaches 140 °C (thermal protection threshold), it shuts down all regulators. The MC34VR500V4ESR2 uses debounced 8.0 ms detection to prevent false triggers from transient spikes. Recovery requires cycling EN or clearing faults via I²C INTSENSE0 register - the MC34VR500V4ESR2 does not auto-restart after thermal shutdown.
Can the MC34VR500V4ESR2 operate without an external I²C host controller?
Yes - the MC34VR500V4ESR2 powers up using factory-programmed internal registers and operates fully without I²C intervention. All regulators, LDOs, and DDR reference are enabled per default sequence. I²C is optional for dynamic reconfiguration (e.g., voltage scaling, fault logging, or mode changes). The MC34VR500V4ESR2 remains functional with SCL/SDA pins unconnected, though advanced diagnostics and runtime adjustments require I²C access.
What is the role of the VHALF pin on the MC34VR500V4ESR2?
The VHALF pin on the MC34VR500V4ESR2 provides a precision half-supply reference derived from the internal bandgap, used exclusively to bias the DDR memory termination network. It connects directly to the DDR VREF pin and must be decoupled with ≥1.0 μF capacitor. Unlike REFOUT (which delivers DDR reference voltage), VHALF serves as a stable midpoint reference for differential signaling - the MC34VR500V4ESR2 requires both VHALF and REFOUT for full DDR4 compliance.
MC34VR500V4ESR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- QorlQ LS1/T1 Communications Processors
- Current - Supply:
- 250µA
- Voltage - Supply:
- 2.8V ~ 4.5V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 56-QFN-EP (8x8)
MC34VR500V4ESR2 FAQ
1.How can I place an order for MC34VR500V4ESR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34VR500V4ESR2 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 MC34VR500V4ESR2 reliable?
The price and inventory of MC34VR500V4ESR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34VR500V4ESR2 is usually 5 days.
3.What payment methods are accepted for MC34VR500V4ESR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34VR500V4ESR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34VR500V4ESR2?
MC34VR500V4ESR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34VR500V4ESR2 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 MC34VR500V4ESR2?
For technical support, including MC34VR500V4ESR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34VR500V4ESR2 requirements.
6.How does Aetrix verify that MC34VR500V4ESR2 is sourced from the original manufacturer or authorized distributors?
All MC34VR500V4ESR2 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 MC34VR500V4ESR2 meets industry standards.
7.What is the process for return or replacement of MC34VR500V4ESR2?
All MC34VR500V4ESR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC34VR500V4ESR2, 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 MC34VR500V4ESR2 part is unused and in its original packaging.
Return procedure for MC34VR500V4ESR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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