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NXP Semiconductors PCA9450BHNY
- Part No.:
- PCA9450BHNY
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
PCA9450BHNY.pdf
- Description:
- PMIC I.MX 8M MINI/NANO/PLUS HVQF
- Quantity:
- Payment:
- Shipping:
Inventory:8,635
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Product details
Overview
PCA9450BHNY from NXP Semiconductors is a dedicated Power Management IC (PMIC) for the i.MX 8M Nano application processor, delivering six step-down regulators (including two 3 A buck converters), five LDOs, a 400 mA load switch, dual-channel I²C level translator, and 32.768 kHz crystal oscillator driver in a single 56-pin HVQFN package. It supports Li-ion/Li-polymer battery and 5 V adapter power sources while enabling DDR4/LPDDR4/DDR3L memory compatibility via U-Boot configuration without hardware changes.
For engineers reviewing the PCA9450BHNY datasheet, PCA9450BHNY pinout, PCA9450BHNY application, or PCA9450BHNY equivalent, this page provides verified regulator configurations, thermal and fault-handling behavior, I²C interface timing (Fm+, 1 MHz), remote sense capability on BUCK1/BUCK2, and precise SNVS-mode sequencing for secure non-volatile storage power delivery.
Technical Context
The PCA9450BHNY implements a fixed-function power architecture optimized for i.MX 8M Nano, with BUCK1 (3 A, 0.85 V) powering the SoC core and BUCK2 (3 A, 0.85 V) supplying GPU/VPU/DRAM rails. BUCK3 is disabled per design, and R_SNSP3_CFG is tied to VSYS - confirmed in Table 4 of the datasheet. LDO1 and LDO2 remain always-on to supply Secure Non-Volatile Storage (SNVS) at 1.8 V/10 mA and 0.85 V/10 mA respectively.
Its power state machine includes eight modes (OFF, READY, SNVS, RUN, STANDBY, PWRDN, PWRUP, FAULT_SD), with deterministic transitions governed by PMIC_ON_REQ and PMIC_STBY_REQ signals. The device features programmable DVS ramping, remote sensing compensation for IR drop, and integrated protection including UVLO, thermal shutdown (TJSHDN), and voltage regulator fault detection with configurable masking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | Valid VSYS operation from 2.7 V to 5.5 V; supports single-cell Li-ion and 5 V adapter inputs. |
| BUCK1 Output | 0.6 V–2.1875 V in 12.5 mV steps, 3 A max; configured at 0.85 V for i.MX 8M Nano SoC core with DVS and remote sense. |
| BUCK2 Output | 0.6 V–2.1875 V in 12.5 mV steps, 3 A max; set to 0.85 V for GPU/VPU/DRAM; supports DVS and remote sensing. |
| LDO1 / LDO2 | 1.6–1.9 V / 0.8–1.15 V, 10 mA each; always-on outputs for SNVS domain; enable RTC_RESET_B release after tRTC_RST = 20 ms. |
| I²C Interface | Fm+ mode, 1 MHz maximum clock rate; supports register read/write, reset control (SW_RST), and fault status monitoring. |
| Operating Temperature | –40 °C to +105 °C ambient; junction rated to +125 °C with thermal shutdown at TJSHDN. |
| Package | HVQFN56, 7 mm × 7 mm, 0.4 mm pitch, 0.85 mm body height; exposed thermal pad (EP) connected to PGND. |
Pinout & Package
PCA9450BHNY is housed in a thermally enhanced 56-pin HVQFN package (SOT949-6) with 0.4 mm pitch and exposed thermal pad (EP). Pin functions are validated per datasheet Table 3 and Figure 2, with all buck AGND and PGND pins internally routed to EP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INL1 | LDO input supply | Primary input for LDO1–LDO5; bypassed with 4.7 µF capacitor to ground. |
| LDO1, LDO2 | Always-on SNVS regulators | 1.8 V / 0.85 V outputs; power RTC, SNVS logic, and assert RTC_RESET_B after valid startup sequence. |
| BUCK1 / BUCK2 LX1, LX2 | Switching node outputs | High-current switching terminals for SoC and GPU/DRAM rails; require external 0.47 µH inductor and 10 µF/22 µF output capacitors. |
| R_SNSP1, R_SNSP2 | Remote sense inputs | Compensate for PCB trace IR drop on BUCK1/BUCK2 outputs; connect directly to load-side feedback points. |
| PMIC_ON_REQ / PMIC_STBY_REQ | Power sequencing control | Active-high digital inputs that trigger PWRUP, RUN, STANDBY, and PWRDN state transitions per Figure 7. |
| SCL / SDA | I²C communication interface | Fm+, 1 MHz bidirectional bus for configuration, monitoring, and software reset via SW_RST register (0x06). |
| SWIN / SWOUT / SW_EN | SD card load switch | 3.3 V input (tied to BUCK4), 400 mA switched output with active discharge; controlled by SW_EN (1.5 MΩ pull-down). |
| SDAH / SCLH / SDAL / SCLL | I²C level translator channels | Translates between 3.3 V (SDAH/SCLH) and 1.8 V (SDAL/SCLL) domains; enables direct connection to i.MX 8M Nano's dual-voltage I²C peripherals. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3 A DVS Buck Regulators | BUCK1 and BUCK2 support dynamic voltage scaling with programmable ramp rates and remote sense compensation for stable SoC/GPU rail regulation under load transients. |
| Secure Non-Volatile Storage (SNVS) Power | LDO1 and LDO2 remain powered during all operational states when INL1 is valid, ensuring continuous RTC and cryptographic key storage integrity. |
| Configurable Power Sequencing | Eight-state power machine (OFF → READY → SNVS → RUN → STANDBY → PWRDN → FAULT_SD) with tSTEP = 2 ms inter-rail delay and tPOR_B = 20 ms POR assertion. |
| Integrated 32.768 kHz Oscillator Driver | Drives external crystal and buffers output as CLK_32K_OUT; enables low-power RTC operation independent of main SoC clocks. |
| Built-in Fault Protection | Monitors UVLO, thermal shutdown (TJSHDN), and regulator POK faults; enters FAULT_SD mode with configurable masking and automatic recovery to SNVS or READY. |
| I²C Level Translation | Two-channel auto-direction-sensing transceiver translates between 1.8 V (VINT domain) and 3.3 V (SWIN domain), eliminating external level shifters for SD card and peripheral I²C buses. |
Applications
| i.MX 8M Nano-Based Industrial HMI | Portable IoT Gateway |
|---|---|
Use Scenario: Fanless industrial panel PC with touch interface, operating in extended temperature environments (-40 °C to +85 °C). IC Role / Device Role: Primary PMIC managing SoC core (BUCK1), GPU/DRAM (BUCK2), SNVS (LDO1/LDO2), SD card (load switch), and RTC (32.768 kHz driver). Use Value: Eliminates discrete power components; enables reliable cold/warm reset via WDOG_B and PMIC_RST_B; supports seamless transition between RUN and STANDBY for low-power monitoring. |
Use Scenario: Battery-powered edge gateway aggregating sensor data over LoRaWAN and Wi-Fi, requiring long runtime and secure boot. IC Role / Device Role: Single-chip power solution for i.MX 8M Nano, supplying 0.85 V SoC core, 0.85 V GPU/DRAM, 1.8 V SNVS, and 3.3 V SD card interface. Use Value: Remote sense on BUCK1/BUCK2 maintains voltage accuracy across PCB traces; always-on LDO1/LDO2 preserve secure keys during sleep; integrated oscillator reduces BOM count. |
| ePOS Terminal with Secure Payment | Smart Retail Display Kiosk |
Use Scenario: PCI-compliant electronic point-of-sale terminal with EMV contactless reader and encrypted storage. IC Role / Device Role: Manages power sequencing for secure boot, supplies SNVS domain for cryptographic accelerators, and drives 32.768 kHz RTC for transaction timestamping. Use Value: LDO1/LDO2 guarantee uninterrupted SNVS power during brownouts; FAULT_SD mode prevents corrupted transactions during thermal overload; I²C translator isolates payment controller voltage domains. |
Use Scenario: Wall-mounted retail display running Android-based UI with HDMI output and local storage. IC Role / Device Role: Powers i.MX 8M Nano SoC, LPDDR4 memory, HDMI PHY (via LDO4), and microSD card (via 400 mA load switch). Use Value: BUCK4 (3.3 V, 3 A) supplies HDMI PHY and SD card simultaneously; LDO4 (0.9 V, 200 mA) delivers clean power to analog PHY circuitry; U-Boot-configurable memory support simplifies DDR4/LPDDR4 migration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9450AAHNY | Includes enabled BUCK3 (3 A) for VPU/GPU/DRAM; R_SNSP3_CFG used as feedback pin. | Targeted for i.MX 8M Mini; supports three DVS buck regulators instead of two. | Select PCA9450AAHNY only when i.MX 8M Mini platform requires third DVS rail; not pin-compatible due to different BUCK3 configuration and power-up sequence. |
| PCA9450CHNY | Replaces BUCK1/BUCK3 with 6 A dual-phase buck regulator; R_SNSP3_CFG tied to GND. | Designed for i.MX 8M Plus with higher SoC power demands; lacks independent BUCK3 control. | PCA9450CHNY suits i.MX 8M Plus designs needing higher current density; incompatible with i.MX 8M Nano due to altered regulator topology and sequencing. |
Compared with PCA9450BHNY, PCA9450AAHNY adds a third DVS buck for i.MX 8M Mini-specific workloads, while PCA9450CHNY consolidates BUCK1/BUCK3 into a dual-phase 6 A regulator for i.MX 8M Plus - neither offers functional or pin compatibility with PCA9450BHNY in i.MX 8M Nano systems.
Availability
PCA9450BHNY is available at Aetrix Electronics and suitable for industrial HMI, portable IoT gateways, and ePOS terminals requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability validation.
Supply support for PCA9450BHNY 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 PCA9450 product line delivers highly integrated, application-processor-specific PMICs for the i.MX 8M family, designed to minimize external components, simplify power sequencing, and ensure robust operation across portable and industrial use cases.
FAQ
What is the primary target processor for PCA9450BHNY?
The PCA9450BHNY is specifically engineered for the i.MX 8M Nano application processor. Its regulator configuration - including two enabled 3 A DVS buck converters (BUCK1 and BUCK2), disabled BUCK3, and fixed LDO assignments - matches the power architecture defined in NXP's PCA9450 selection guide (Table 4). It is not intended for i.MX 8M Mini or i.MX 8M Plus platforms.
Does PCA9450BHNY support Dynamic Voltage Scaling (DVS) on all buck regulators?
No. PCA9450BHNY supports DVS only on BUCK1 and BUCK2 - both configured at 0.85 V for i.MX 8M Nano SoC and GPU/DRAM rails. BUCK3 is disabled per datasheet Table 4, where R_SNSP3_CFG is tied to VSYS. DVS functionality is absent on BUCK4–BUCK6, which operate at fixed voltages (3.3 V, 1.8 V, 1.1 V) without programmable scaling.
How does PCA9450BHNY handle secure non-volatile storage (SNVS) power?
PCA9450BHNY powers the SNVS domain using two dedicated, always-on LDOs: LDO1 (1.8 V, 10 mA) and LDO2 (0.85 V, 10 mA), supplied from INL1. These regulators remain active whenever input voltage is valid, enabling continuous RTC operation and cryptographic key retention. RTC_RESET_B is asserted high only after both LDOs reach regulation, with tRTC_RST = 20 ms.
What is the role of the R_SNSP3_CFG pin on PCA9450BHNY?
On PCA9450BHNY, the R_SNSP3_CFG pin is hardwired to VSYS to disable BUCK3, as specified in Table 4 of the datasheet. This differs from PCA9450AA (used as BUCK3 feedback) and PCA9450C (tied to GND for dual-phase configuration). Leaving R_SNSP3_CFG unconnected or floating is prohibited; it must be externally tied to VSYS for correct i.MX 8M Nano operation.
Can PCA9450BHNY drive an external 32.768 kHz crystal?
Yes. PCA9450BHNY integrates a dedicated 32.768 kHz crystal oscillator driver with XTAL_IN and XTAL_OUT pins. When a crystal is connected, the internal oscillator starts and buffers the signal to CLK_32K_OUT. If no crystal is used, XTAL_IN must be tied to GND and XTAL_OUT left floating - the internal RC oscillator remains active for basic timing, but with lower accuracy than crystal-based operation.
PCA9450BHNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- General Purpose
- Current - Supply:
- 20µA
- Voltage - Supply:
- 2.85V ~ 5.5V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-HVQFN (7x7)
PCA9450BHNY FAQ
1.How can I place an order for PCA9450BHNY through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9450BHNY 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 PCA9450BHNY reliable?
The price and inventory of PCA9450BHNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9450BHNY is usually 5 days.
3.What payment methods are accepted for PCA9450BHNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9450BHNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9450BHNY?
PCA9450BHNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9450BHNY 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 PCA9450BHNY?
For technical support, including PCA9450BHNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9450BHNY requirements.
6.How does Aetrix verify that PCA9450BHNY is sourced from the original manufacturer or authorized distributors?
All PCA9450BHNY 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 PCA9450BHNY meets industry standards.
7.What is the process for return or replacement of PCA9450BHNY?
All PCA9450BHNY units undergo pre-shipment inspection (PSI). If there is an issue with PCA9450BHNY, 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 PCA9450BHNY part is unused and in its original packaging.
Return procedure for PCA9450BHNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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