PF9453 - PMIC for i.MX 91/93, 4 Bucks + 3 LDOs | NXP
MPN： PF9453 ✓ 啟用中PF9453 概覽
A PMIC (Power Management IC) is an integrated power-management solution that consolidates multiple voltage regulators, switches, and supervisory functions into one device. In the power-supply hierarchy, a processor PMIC sits above discrete DC-DC converters and LDOs, providing complete, sequenced multi-rail power for an SoC and its peripherals from a single input supply, reducing bill-of-materials count, board area, and bring-up complexity.
Key features include four high-efficiency, low-quiescent-current buck regulators that generate the core, SoC, DDR, and I/O rails required by i.MX 91/i.MX 93 processors; two general-purpose LDO regulators (one LDO in WLCSP-package variants) plus a low-Iq SNVS LDO that keeps real-time and always-on domains alive during low-power modes; a 400 mA integrated load switch for peripheral power control; and an onboard 32.768 kHz crystal oscillator for the RTC clock domain.
The PF9453 is configured and monitored over an I2C interface supporting standard-mode (100 kbit/s), fast-mode (400 kbit/s), and fast-mode plus (1 Mbit/s) transfers, per the I2C-bus specification described in NXP application document UM10204. Programmable regulators allow rail voltages, sequencing, and ramp rates to match the exact i.MX 91/i.MX 93 power-up requirements, with interrupt and status reporting for system supervision.
Typical applications include i.MX 91 and i.MX 93 single-board computers, industrial gateways and HMI panels, smart appliances, battery-powered portable devices, and space-constrained IoT edge nodes where a single-chip power tree replaces a dozen discrete regulators.
When designing with the PF9453, follow the NXP-recommended i.MX 91/i.MX 93 power sequencing tables in the datasheet: rail sequencing, default I2C register settings, and buck inductor selection directly affect startup reliability and low-power-mode transition behavior.
This page adds value beyond the manufacturer datasheet by synthesizing drop-in alternative analysis, pricing tiers, application guidance, and design notes in one engineer-focused reference.
直接替換替代品，適用於 PF9453 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PF9453 （相同外形與佔位） — 差異在於 Buck Regulators, LDO Regulators, Load Switch, Package, Product Type.
MPF9453AVMA1HN
✅ 直接替換📋 參考替代品（不在目錄中）
PCA9451AHNY
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PCA9450CHNY
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TLE8082ESXUMA1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PF9453 規格
| Product Type | Single-chip Power Management IC (PMIC) for i.MX 91 / i.MX 93 |
| Buck Regulators | 4 (high-efficiency step-down) |
| LDO Regulators | 2 general-purpose + 1 low-Iq SNVS LDO (1 general-purpose LDO in WLCSP variant) |
| Load Switch | 1, 400 mA |
| Crystal Oscillator | 32.768 kHz |
| Control Interface | I2C, 100 kbit/s / 400 kbit/s / 1 Mbit/s (standard / fast / fast-mode plus) |
| Target Processors | i.MX 91, i.MX 93 |
| 封裝 | 40-HVQFN (5x5 mm) |
| 安裝類型 | Surface Mount |
| Application Domains | IoT, smart appliance, industrial, portable |
| 生命週期狀態 | Active (per NXP product page) |
PF9453 40-hvqfn (5x5 mm) 腳位配置指南
PF9453（40-hvqfn (5x5 mm) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： PF9453.
請參閱 資料表 以查看完整腳位配置。
典型應用
PF9453 適用於 6 應用s: i.MX 91 Single-Board Computers, i.MX 93 Industrial Gateways and HMI Panels, IoT Edge Nodes and Smart Appliances, Battery-Powered Portable Devices, Smart Home Control Panels, Embedded Linux Prototype and Reference Platforms.
i.MX 91 Single-Board Computers
The PF9453 is the NXP-matched power solution for i.MX 91 single-board computers, where its four high-efficiency bucks supply the SoC core, DDR, and I/O rails in one 40-HVQFN 5x5 mm footprint. Because the rail count, sequencing, and I2C register map were validated by NXP against the i.MX 91 power requirements, board bring-up risk drops sharply versus a discrete regulator design. In a typical layout the PMIC sits adjacent to the processor with the SNVS LDO and 32.768 kHz oscillator sustaining the RTC domain through deep sleep. The 400 mA load switch gates peripheral power so unused subsystems draw zero current in standby, and fast-mode plus I2C (1 Mbit/s) supports rapid voltage scaling during DVFS transitions.
推薦
i.MX 93 Industrial Gateways and HMI Panels
For i.MX 93-based industrial gateways and human-machine interface panels, the PF9453 provides the multi-rail power tree inside a compact, thermally efficient HVQFN-40 package. Industrial environments demand wide temperature robustness, low standby drain for battery-backed operation, and clean sequencing across repeated power cycles - all addressed by the PF9453's low-quiescent-current bucks and programmable I2C sequencing. The low-Iq SNVS LDO keeps the RTC and secure domain alive for timestamping and provisioning data, while the 400 mA load switch disconnects radios and sensors during planned downtime. Designers place 32.768 kHz crystal support on-chip, removing one more external component from crowded industrial PCBs and improving long-term frequency accuracy for scheduled tasks and logs.
推薦
IoT Edge Nodes and Smart Appliances
NXP positions the PF9453 squarely at IoT and smart-appliance endpoints where board space and efficiency dominate. In a smart appliance controller, the four bucks deliver the i.MX 91/93 core, memory, and I/O rails with high conversion efficiency at typical sub-1A loads, extending thermal margin inside sealed enclosures. The integrated 32.768 kHz oscillator and SNVS LDO maintain wall-clock time through mains failure on a coin-cell or supercap, and the 400 mA load switch lets firmware cut Wi-Fi or display power in low-power states. Because one PMIC replaces a dozen discrete regulators, appliance makers reduce BOM lines, placement cost, and qualification effort while retaining full I2C configurability at 100 kbit/s through 1 Mbit/s.
推薦
Battery-Powered Portable Devices
Portable and handheld products using i.MX 91 or i.MX 93 benefit from the PF9453's efficiency-first design: low-quiescent-current bucks minimize idle drain, the SNVS LDO holds the always-on domain at microampere-level current, and the on-chip 32.768 kHz oscillator keeps the RTC running without an external clock IC. The 40-HVQFN 5x5 mm package fits the dense layouts typical of handheld HMI devices and portable medical or diagnostic terminals. Firmware can use I2C fast-mode (400 kbit/s) to transition rails quickly between active and sleep states, and the 400 mA load switch isolates peripheral loads such as sensors and wireless modules, so standby current is dominated only by the SNVS domain rather than the full power tree.
推薦
Smart Home Control Panels
Smart-home wall panels and room controllers built on i.MX 91 require a compact, always-listening power architecture. The PF9453 powers the processor core, LPDDR, and I/O rails with its four bucks while the 32.768 kHz oscillator and SNVS LDO maintain schedules and security credentials through power interruptions - a key requirement for access-control and thermostat functions. Its single-package integration shortens the power design cycle so panel makers can focus on display and touch subsystems, and the 400 mA load switch disconnects the display backlight or radio when the panel sleeps, cutting standby power to comply with energy regulations. I2C configurability lets one PCB design serve multiple SKUs by programming rail voltages in production.
推薦
Embedded Linux Prototype and Reference Platforms
For engineers building simple Linux platforms around i.MX 91/93, NXP's reference designs pair the processor directly with the PF9453, including validated default register settings, sequencing tables, and Linux kernel PMIC driver support. Using the same PMIC as the NXP reference schematic dramatically shortens board bring-up: power rails come up in the order the bootloader expects, DVFS voltage tables map 1:1 to PMIC registers, and suspend/resume paths through the SNVS domain are pre-validated. This makes the PF9453 the lowest-risk choice for proof-of-concept and pilot builds, where the 40-HVQFN 5x5 mm footprint also keeps prototype PCBs small and inexpensive relative to discrete multi-rail alternatives.
推薦
推薦產品摘要
工程參考資料，適用於 PF9453 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MPF9453AVMA1HN | PCA9451AHNY | PCA9450CHNY |
|---|---|---|---|---|
| Package | 40-HVQFN (5x5 mm) | 40-HVQFN (5x5 mm) - same | 40-HVQFN | 40-HVQFN |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Target Processor | i.MX 91 / i.MX 93 | i.MX 91 / i.MX 93 | i.MX 8M family | i.MX 8M family |
| Pin-to-Pin Compatibility | Reference | Identical (same die) | Not verified - revalidate | Not verified - revalidate |
主要差異化特點
- Purpose-built for i.MX 91/i.MX 93 with validated sequencing (對比PCA9451AHNY)
- Integrated 32.768 kHz oscillator and SNVS LDO (對比PCA9450CHNY)
- Integrated 400 mA load switch (對比Discrete buck + load-switch solution)
設計說明
Follow the i.MX 91/93 power sequencing tables in the NXP PF9453 datasheet exactly. The PF9453 defaults are pre-programmed for these processors, but if you change rail voltages or sequencing over I2C, re-verify that the core rail reaches regulation before the DDR and I/O rails, matching the processor's power-up requirement table. Incorrect sequencing can latch the SoC or cause boot failures. For DVFS designs, use fast-mode plus I2C (1 Mbit/s) so voltage transitions complete within the processor's frequency-change timing windows.
Place the PF9453's buck power stage tightly: keep input capacitors within 2-3 mm of the VIN pins, minimize the loop from input cap through the buck switch node to the inductor and output cap, and pour solid ground under the device using the HVQFN-40 exposed pad with a via array (at least 5x5) to the ground plane. This reduces switching noise on the SoC core rail and improves thermal dissipation for the 5x5 mm package. Route sensitive SNVS and 32.768 kHz crystal traces away from buck switch nodes.
Two frequent mistakes: (1) omitting the 32.768 kHz crystal load capacitors or placing the crystal far from the PMIC, which degrades RTC accuracy - follow the datasheet crystal layout guidelines; (2) exceeding the 400 mA rating of the integrated load switch by attaching motor or radio PA loads with high inrush - add soft-start capacitance or select an external switch for larger loads. Also confirm your orderable suffix (e.g., MPF9453AVMA1HN) matches the package and reel/tray option your SMT line expects.
合規資訊
Compliance data was not present in the verified web data. Consult the NXP PF9453 product page and datasheet for RoHS/REACH declarations.
