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NXP Semiconductors MC34PF1550A5EP
- Part No.:
- MC34PF1550A5EP
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
MC34PF1550A5EP.pdf
- Description:
- PF1550
- Quantity:
- Payment:
- Shipping:
Inventory:3,323
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Product details
Overview
MC34PF1550A5EP from NXP Semiconductors is a preprogrammed power management IC (PMIC) optimized for i.MX 6UL processors with DDR3 memory, delivering three 1.0 A buck converters (SW1–SW3), three LDOs (LDO1–LDO3), RTC supply (VSNVS), DDR reference voltage (VREFDDR), and a linear Li-ion battery charger supporting 100–1000 mA charge current. It operates across −40 °C to 105 °C and integrates I²C control, JEITA-compliant thermal monitoring, and OTP-configurable power sequencing for portable IoT and industrial edge devices.
For engineers reviewing the MC34PF1550A5EP datasheet, MC34PF1550A5EP pinout, MC34PF1550A5EP application, or MC34PF1550A5EP equivalent, this page provides verified technical context, exact pin functions, confirmed regulator output ranges, validated alternative parts for i.MX 6UL-based designs, and real-world use-value metrics including dynamic voltage scaling on SW1/SW2, 90%+ peak buck efficiency, and 22 V transient tolerance on VSYS.
Technical Context
The MC34PF1550A5EP implements a fully integrated PMIC architecture with dedicated analog blocks for battery charging (linear topology, 100–1000 mA programmable CC, 3.5–4.44 V CV), power-path management (VBATT-to-VSYS FET with 75 mΩ typical RDS(on)), and system regulation (VCORE/VDIG internal supplies). Its digital core supports OTP-programmed startup/shutdown sequences and I²C-accessible registers for runtime configuration of voltages, current limits, and thermal thresholds.
It features dual-mode buck operation: forced PWM quasi-fixed frequency and adaptive variable-frequency modes for SW1 and SW2, enabling DVS during processor load transitions; SW3 operates in fixed 100 mV steps from 1.8 V to 3.3 V without DVS. The device includes integrated thermistor bias (INT2P7), USB PHY LDO (60 mA, 3.3/4.9 V options), and LED driver with programmable frequency (0.5–256 Hz) and ramp timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck converters | SW1/SW2: 1.0 A, 0.6–1.3875 V (12.5 mV steps) or 1.1–3.3 V (variable); SW3: 1.0 A, 1.8–3.3 V (100 mV steps) - enables core/memory/peripheral rail separation with DVS support on SW1/SW2 |
| LDO regulators | LDO1/LDO3: 300 mA, 0.75–1.5 V / 1.8–3.3 V with load switch; LDO2: 400 mA, 1.8–3.3 V - supports low-noise analog rails and controlled power gating |
| Battery charger | Linear Li-ion/Li-Poly, 100–1000 mA CC, 3.5–4.44 V CV, JEITA temp sensing, 5–50 mA termination - delivers safe, field-configurable charging for single-cell battery systems |
| Input voltage range | VBUSIN: 4.1–6.0 V (USB/adapter), withstands up to 22 V transients; VSYS: −0.3–4.8 V - ensures robustness against surge events in portable power inputs |
| Operating temperature | −40 °C to 105 °C (industrial grade) - qualified for extended deployment in embedded gateways, wearables, and industrial controllers |
| Package & interface | 40-pin QFN 5.0 × 5.0 mm with exposed pad; I²C (SCL/SDA), GPIOs (ONKEY/PWRON/STANDBY), watchdog (WDI), interrupt (INTB) - enables compact layout and host-processor coordination |
Pinout & Package
MC34PF1550A5EP uses a 40-pin QFN package (98ASA00913D) with 5.0 mm × 5.0 mm footprint and thermally enhanced exposed pad (EPAD, Pin 41) requiring PCB ground connection for thermal dissipation and EMI control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1FB (Pin 27) | Buck 1 feedback input | Connects to resistor divider for precise 0.6–1.3875 V or 1.1–3.3 V output regulation; enables DVS via I²C register control |
| LDO2OUT (Pin 19) | LDO2 regulated output | Delivers 400 mA at 1.8–3.3 V; used for I/O or peripheral supply with <1.5 μA quiescent current in low-power mode |
| VREFDDR (Pin 21) | DDR memory reference voltage | Provides 0.5–0.9 V at 10 mA for DDR3 termination; derived from VINREFDDR/2 with internal precision division |
| CHGB (Pin 40) | Charger LED driver sink | Drives external LED anode-connected to VSYS; supports programmable duty cycle (10–100%), frequency (0.5–256 Hz), and ramp timing |
| THM (Pin 32) | Thermistor bias node | Connects NTC thermistor to ground; enables JEITA-compliant battery temperature monitoring with 0.5–5.0 °C hysteresis |
| VBUSIN (Pin 37) | Charger input supply | Accepts 4.1–6.0 V USB/adapter input; withstands 22 V DC/transient surges; triggers UVLO (4.0 V) and OVLO (6.5 V) |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic voltage scaling (DVS) | SW1 and SW2 support real-time voltage adjustment via I²C to match i.MX 6UL core performance states - reduces active power by up to 30% during low-load operation |
| OTP-configurable power sequencing | User-programmable startup/shutdown order, soft-start timing, and regulator enable/disable delays stored in one-time programmable memory - eliminates need for external sequencing ICs |
| Integrated battery protection | Programmable overcurrent threshold (2.0–4.0 A), thermal regulation (80/95/110 °C), and precharge (2.8 V threshold) - prevents unsafe charging conditions without external circuitry |
| VSYS transient resilience | Withstands 22 V transients on VSYS rail and maintains regulation during 1.0 A/µs load steps with <850 mV peak-to-peak deviation - sustains stable system operation during sudden power demand spikes |
| I²C-controlled LED status indicator | Configurable blink pattern, brightness (via current limit), and ramp timing directly from host processor - provides visual battery/charging state without GPIO expansion |
Applications
| Smart Wearables | Industrial IoT Gateways |
|---|---|
|
Use Scenario: Compact wrist-worn health monitor with i.MX 6UL, BLE radio, sensors, and rechargeable Li-ion battery. IC Role / Device Role / Timing Role: MC34PF1550A5EP supplies core (SW1), DDR3 (SW3), I/O (LDO2), RTC (VSNVS), and USB PHY (USBPHY) rails while managing battery charge/discharge cycles. Use Value: Enables 14-day battery life via 1.0 μA ULP-mode quiescent current on bucks and <1.5 μA LDO standby current - critical for always-on sensor aggregation. |
Use Scenario: DIN-rail mounted edge gateway connecting Modbus RTU field devices to cloud via LTE/WiFi, operating continuously in factory environments. IC Role / Device Role / Timing Role: MC34PF1550A5EP powers i.MX 6UL CPU, DDR3 memory, Ethernet PHY, and isolated serial interfaces while regulating auxiliary 3.3 V and 1.8 V rails. Use Value: −40 °C to 105 °C rating and 22 V transient tolerance on VSYS ensure reliable operation during voltage sags, surges, and ambient thermal extremes. |
| Wireless Game Controllers | POS Terminals |
|
Use Scenario: Low-latency Bluetooth gaming controller with motion sensors, haptic feedback, and USB-C recharging. IC Role / Device Role / Timing Role: MC34PF1550A5EP delivers dynamic core voltage (SW1 DVS), sensor/I²C rail (LDO1), haptic driver supply (SW3), and fast 500 mA charging with LED status (CHGB). Use Value: Programmable charge termination (5–50 mA) and JEITA compliance prevent battery degradation during frequent partial charges - extends usable cycle count beyond 500 cycles. |
Use Scenario: Retail point-of-sale terminal with touchscreen, barcode scanner, thermal printer, and backup coin-cell RTC. IC Role / Device Role / Timing Role: MC34PF1550A5EP powers ARM core (SW1), DDR3 (SW3), display interface (LDO2), secure element (LDO3), and coin-cell charger (VSNVS + LICELL). Use Value: Integrated coin-cell charging and 3.0 V VSNVS rail maintain RTC accuracy during main power loss - guarantees time-stamped transaction logging without external backup components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34PF1550A3EP | Preprogrammed for i.MX 6UL with DDR3L memory; differs in DDR voltage calibration and startup sequence timing | Targeted at lower-voltage DDR3L systems (1.35 V) rather than standard DDR3 (1.5 V); not calibrated for MC34PF1550A5EP's DDR3 VREFDDR range | Select when designing for DDR3L memory interface and matching OTP configuration for i.MX 6UL DDR3L reference designs |
| MC34PF1550A6EP | Preprogrammed for i.MX 6ULL with DDR3L; includes different LDO1/LDO3 output voltage defaults and reduced SW3 output range | Optimized for i.MX 6ULL's lower power envelope and DDR3L compatibility; lacks full DDR3 VREFDDR support and higher SW3 voltage capability | Choose for i.MX 6ULL-based cost-sensitive designs where DDR3L suffices and full DDR3 VREFDDR (0.5–0.9 V) is not required |
Compared with MC34PF1550A3EP and MC34PF1550A6EP, the MC34PF1550A5EP uniquely supports standard DDR3 (1.5 V) timing and VREFDDR calibration, making it the only variant qualified for i.MX 6UL designs requiring strict DDR3 electrical compliance and 1.8–3.3 V SW3 output flexibility.
Availability
MC34PF1550A5EP is available at Aetrix Electronics and suitable for smart wearables, industrial IoT gateways, and wireless game controllers requiring stable component supply, long-term lifecycle assurance, and industrial-temperature-grade reliability.
Supply support for MC34PF1550A5EP 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in ARM-based application processors and power management.
The PF1550 product line was designed specifically to simplify power architecture for NXP's i.MX low-power application processors, integrating all essential rails, battery management, and configurability into a single QFN package for space-constrained portable and embedded systems.
FAQ
What is the primary target processor for MC34PF1550A5EP?
The MC34PF1550A5EP is preprogrammed specifically for the i.MX 6UL processor with DDR3 memory interface. Its OTP configuration includes optimized power-up sequencing, voltage setpoints for DDR3 VREFDDR (0.5–0.9 V), and regulator timing aligned to i.MX 6UL's power requirements - distinguishing it from variants like MC34PF1550A3EP (DDR3L) or MC34PF1550A6EP (i.MX 6ULL).
Does MC34PF1550A5EP support dynamic voltage scaling (DVS)?
Yes, MC34PF1550A5EP supports DVS on buck converters SW1 and SW2 via I²C register control. This allows real-time adjustment of output voltages (e.g., 0.6–1.3875 V in 12.5 mV steps) to match i.MX 6UL core performance states, reducing dynamic power consumption during low-load operation while maintaining regulation stability.
What battery charging parameters are user-programmable on MC34PF1550A5EP?
MC34PF1550A5EP supports programmable charge voltage (3.5–4.44 V), charge current (100–1000 mA), termination current (5–50 mA), precharge threshold (2.8 V), and thermal regulation points (80/95/110 °C). These parameters are configured via I²C and can be permanently stored in OTP memory for production consistency.
How does MC34PF1550A5EP handle input voltage transients?
MC34PF1550A5EP withstands up to 22 V transients on the VSYS rail and 24 V on VBUSIN, with built-in overvoltage protection (OVLO at 6.5 V) and undervoltage lockout (UVLO at 4.0 V). Its power-path FET (75 mΩ typical RDS(on)) and internal clamping ensure system-level resilience without external TVS diodes in most portable designs.
Is MC34PF1550A5EP compatible with i.MX 7ULP processors?
No, MC34PF1550A5EP is not compatible with i.MX 7ULP processors. It is explicitly programmed for i.MX 6UL with DDR3 memory. For i.MX 7ULP, NXP specifies MC34PF1550A2EP or MC34PF1550A4EP - these variants feature different DDR voltage calibration, startup timing, and LDO default outputs optimized for LPDDR3 interfaces and 7ULP's lower power envelope.
MC34PF1550A5EP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Embedded Systems, Low-Power IoT, Mobile/Wearable Devices
- Current - Supply:
- -
- Voltage - Supply:
- 3.8V ~ 7V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-HVQFN (5x5)
MC34PF1550A5EP FAQ
1.How can I place an order for MC34PF1550A5EP through Aetrix?
Please submit a Request for Quotation (RFQ) for MC34PF1550A5EP 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 MC34PF1550A5EP reliable?
The price and inventory of MC34PF1550A5EP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC34PF1550A5EP is usually 5 days.
3.What payment methods are accepted for MC34PF1550A5EP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC34PF1550A5EP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC34PF1550A5EP?
MC34PF1550A5EP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC34PF1550A5EP 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 MC34PF1550A5EP?
For technical support, including MC34PF1550A5EP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC34PF1550A5EP requirements.
6.How does Aetrix verify that MC34PF1550A5EP is sourced from the original manufacturer or authorized distributors?
All MC34PF1550A5EP 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 MC34PF1550A5EP meets industry standards.
7.What is the process for return or replacement of MC34PF1550A5EP?
All MC34PF1550A5EP units undergo pre-shipment inspection (PSI). If there is an issue with MC34PF1550A5EP, 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 MC34PF1550A5EP part is unused and in its original packaging.
Return procedure for MC34PF1550A5EP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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