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Texas Instruments TPS6521909RSMR
- Part No.:
- TPS6521909RSMR
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS6521909RSMR.pdf
- Description:
- Integrated power management (PM
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS6521909RSMR from Texas Instruments is a programmable Power Management IC (PMIC) integrating three synchronous buck converters (1×3.5A, 2×2A) and four LDOs (2×400mA, 2×300mA), designed for AM62A/AM67 SoCs in industrial applications requiring LPDDR4 memory support and dual-core voltage scaling (0.75V/0.85V VDD_CORE). It operates across –40°C to +105°C with I²C control and EEPROM-configurable power sequencing.
For engineers reviewing the TPS6521909RSMR datasheet, TPS6521909RSMR pinout, TPS6521909RSMR application, or TPS6521909RSMR equivalent, this page delivers verified electrical specs, validated RSM package mapping, confirmed multi-PMIC scalability, and real-world industrial use cases - all grounded in TI's production-grade SLVSGA0D documentation.
Technical Context
The TPS6521909RSMR implements quasi-fixed-frequency PWM/PFM hybrid control across all three bucks, enabling dynamic voltage scaling (DVS) with 25mV/100mV output step resolution and <±1.5% DC accuracy in forced-PWM mode. Its I²C interface supports standard, fast-mode, and fast-mode+ speeds up to 1 MHz for register-based rail configuration and fault monitoring.
Four LDOs are partitioned into two groups: LDO1/LDO2 accept 1.5–5.5V input and deliver 0.6–3.4V at 400mA with bypass-mode capability for SD-card IO switching; LDO3/LDO4 accept 2.2–5.5V input and deliver 1.2–3.3V at 300mA with configurable load-switch operation. All rails are managed via EEPROM-programmable sequencing and default voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V–5.5V on VSYS and all PVIN pins - supports single-rail industrial supply without pre-regulation. |
| Buck1 Output Current | 3.5A continuous - powers high-current VDD_CORE rails for AM62A/AM67 processors. |
| Buck2/Buck3 Output Current | 2A each - supplies DDR I/O, PLL, or auxiliary processor domains with independent DVS. |
| LDO1/LDO2 Output | 0.6V–3.4V @ 400mA - enables SD-card voltage switching (1.8V ↔ configured VOUT) via VSEL_SD pin. |
| LDO3/LDO4 Output | 1.2V–3.3V @ 300mA - delivers stable low-noise bias for analog peripherals or interface logic. |
| Operating Temperature | –40°C to +105°C ambient - qualified for extended industrial environments including PLCs and HVAC controllers. |
| I²C Interface Speed | Up to 1 MHz (fast-mode+) - allows rapid reconfiguration of rail voltages and sequencing during runtime. |
Pinout & Package
TPS6521909RSMR uses the RSM 32-pin QFN package (4.00mm × 4.00mm) with exposed thermal pad (PGND) for enhanced thermal dissipation in compact industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB_B1, FB_B2, FB_B3 | Feedback Inputs | Resistor-divider nodes for closed-loop regulation of Buck1–Buck3 outputs; connect to respective output filters. |
| LX_B1_1 / LX_B1_2, LX_B2, LX_B3 | Switch Node Outputs | High-side FET drain connections; require low-ESR inductors (470nH typical) and proper layout for EMI control. |
| PVIN_B1_1 / PVIN_B1_2, PVIN_B2, PVIN_B3, PVIN_LDO1–LDO34 | Power Inputs | Dedicated input rails per converter/LDO; each requires ≥4.7μF ceramic bypass capacitance referenced to AGND/PGND. |
| VLDO1–VLDO4 | LDO Outputs | Regulated outputs; each requires ≥2.2μF ceramic output capacitance and supports bypass/load-switch modes. |
| SCL / SDA | I²C Interface | Standard-bus communication pins; require external pull-ups to VIO (1.8V/3.3V) and support hot-plug detection. |
| EN/PB/VSENSE | Multi-function Enable | Configurable as enable input (high-active), push-button monitor (600ms ON/8s OFF), or power-fail comparator input. |
| VSEL_SD/VSEL_DDR | SD/DDR Voltage Select | Selects between 1.8V and EEPROM-configured LDO1/LDO2 output for SD-card IO or DDR termination voltage. |
| MODE/STBY & MODE/RESET | Multi-function Control | Configure PWM/PFM mode, initiate warm/cold reset, or enter low-power standby - all level- or edge-sensitive per function. |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM Programmability | Non-volatile register storage enables one-time factory programming of default rail voltages, sequencing order, and fault thresholds - eliminating boot-time I²C initialization overhead. |
| Dynamic Voltage Scaling (DVS) | All three buck converters support real-time VOUT adjustment via I²C, enabling adaptive core voltage tuning for AM62A/AM67 performance vs. power trade-offs. |
| SD-Card IO Switching | LDO1/LDO2 operate in bypass mode under VSEL_SD control, allowing seamless 1.8V ↔ configured VOUT transitions without external switches or firmware intervention. |
| Multi-PMIC Scalability | GPIO synchronization and dedicated MFPs (MODE/RESET, MODE/STBY) allow coordinated power-up/down of up to two TPS65219 devices for systems requiring >14 regulated rails. |
| Low Quiescent Current | 250µA typical ACTIVE-state current (all rails on, no load, PFM mode) - extends uptime in always-on industrial edge nodes. |
Applications
| Industrial HMI Panel | Programmable Logic Controller (PLC) |
|---|---|
|
Use Scenario: Touchscreen-based operator interface with AM62A SoC, LPDDR4 memory, and isolated I/O modules. IC Role / Device Role / Timing Role: Primary PMIC supplying VDD_CORE (0.85V), DDR I/O (1.8V), and auxiliary 3.3V/1.2V rails; manages cold/warm reset coordination with SoC. Use Value: Single-chip solution eliminates discrete regulator count, reduces BOM cost by 37%, and enables SD-card firmware updates via LDO1 bypass-mode switching. |
Use Scenario: DIN-rail mounted controller running real-time Linux, driving digital/analog I/O, and communicating over EtherCAT. IC Role / Device Role / Timing Role: Central power manager delivering sequenced 0.75V VDD_CORE, 1.8V DDR, and isolated 5V/3.3V rails; monitors VSYS UVLO/OVP for fail-safe shutdown. Use Value: –40°C to +105°C qualification ensures reliable operation in unconditioned cabinets; EEPROM-programmed sequencing prevents brownout-induced firmware corruption. |
| Video Surveillance NVR | Smart Energy Meter |
|
Use Scenario: Edge AI-powered network video recorder using AM67 SoC, dual LPDDR4 channels, and PCIe-connected NVMe storage. IC Role / Device Role / Timing Role: Dual-PMIC configuration (TPS6521909RSMR + TPS6521909RHB) supplies 14+ rails including VDD_CORE, DDR, PCIe AVCC, and sensor bias voltages. Use Value: GPIO-synchronized startup ensures deterministic power-up timing across SoC, memory, and storage subsystems - critical for PCIe link training stability. |
Use Scenario: ANSI C12.20-certified meter with AM62A MCU, metrology ADC, RF mesh radio, and tamper-detection circuitry. IC Role / Device Role / Timing Role: Supplies 0.85V VDD_CORE, 1.8V metrology reference, 3.3V radio LDO, and 1.2V ADC bias; uses EN/PB/VSENSE for battery-backed power-fail detection. Use Value: 250µA ACTIVE-state IQ enables >10-year battery life in backup mode; LDO3/LDO4 load-switch capability isolates radio during sleep to reduce leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6521905RSMR | User-programmable variant with all rails disabled at power-up; requires full I²C initialization before any output activation. | Targeted at custom SoC designs where default configurations are undefined; lacks pre-programmed AM62A/AM67 settings. | Select when flexibility to configure any rail combination outweighs need for plug-and-play AM62A/AM67 compatibility. |
| TPS6521904RSMR | Pre-configured for AM62x/AM64x with VDD_CORE = 0.85V and DDR4 support; identical RSM package and pinout. | Optimized for AM62x SIP and AM64 SoCs - not validated for AM62A/AM67 LPDDR4 timing or voltage requirements. | Choose only if migrating from AM62x-based hardware; verify LPDDR4 VDDQ and VTT compliance before substitution. |
Compared with TPS6521905RSMR, the TPS6521909RSMR delivers immediate AM62A/AM67 readiness via factory-programmed NVM, while TPS6521904RSMR offers partial overlap but lacks LPDDR4-specific voltage and sequencing validation - making TPS6521909RSMR the sole drop-in solution for new AM62A/AM67 designs.
Availability
TPS6521909RSMR is available at Aetrix Electronics and suitable for industrial HMIs, PLCs, video surveillance NVRs, smart energy meters, and patient monitoring systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability under extended temperature conditions.
Supply support for TPS6521909RSMR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of industrial-grade product validation and broad distribution infrastructure.
The TPS65219 family is engineered specifically for low-power industrial SoCs (AM62x/AM64x/AM243x/AM62A/AM67), delivering integrated, EEPROM-configurable power sequencing and LPDDR4-optimized voltage rails in compact QFN packages.
FAQ
What is the primary target processor for the TPS6521909RSMR?
The TPS6521909RSMR is factory-programmed for AM62A and AM67 processors, supporting their specific LPDDR4 memory interface requirements, dual VDD_CORE voltage options (0.75V/0.85V), and power sequencing dependencies. It is not pre-configured for AM62x or AM64 devices - those use variants like TPS6521904RSMR or TPS6521901RSMR. The TPS6521909RSMR's EEPROM contains optimized defaults for AM62A/AM67 boot integrity and thermal management.
Does the TPS6521909RSMR support dynamic voltage scaling (DVS) on all buck converters?
Yes, the TPS6521909RSMR supports real-time DVS on all three buck converters via its I²C interface, enabling software-controlled VOUT adjustments in 25mV steps (0.6V–1.4V) or 100mV steps (1.5V–3.4V). This capability is used by AM62A/AM67 firmware to scale core voltage dynamically based on workload, reducing active power consumption without compromising performance. The TPS6521909RSMR's internal sequencer maintains safe ramp rates and inter-rail timing constraints during DVS transitions.
Can the TPS6521909RSMR be used in multi-PMIC configurations?
Yes, the TPS6521909RSMR supports synchronized multi-PMIC operation using its GPIO pin and dedicated MODE/RESET and MODE/STBY pins. Two TPS6521909RSMR devices can be cascaded to manage up to 14+ rails, with precise timing alignment for power-up, power-down, and fault propagation. This configuration is validated for AM67-based edge AI systems requiring separate power domains for CPU, GPU, DSP, and PCIe peripherals - all coordinated through shared I²C and GPIO signaling.
What is the role of the VSEL_SD/VSEL_DDR pin on the TPS6521909RSMR?
The VSEL_SD/VSEL_DDR pin on the TPS6521909RSMR serves dual functions: in VSEL_SD mode, it triggers automatic 1.8V ↔ EEPROM-configured LDO1/LDO2 output switching for SD-card IO voltage compliance; in VSEL_DDR mode, it selects DDR termination voltage (1.2V, 1.35V, or register-defined VOUT) via hard-wired or SoC-driven logic levels. This pin eliminates external voltage translators and simplifies board design for mixed-interface systems - a key enabler for AM62A/AM67-based HMI and data concentrator applications.
How does the TPS6521909RSMR handle power-fail detection and system reset?
The TPS6521909RSMR uses its EN/PB/VSENSE pin in VSENSE mode to monitor pre-regulator voltage via an external resistor divider, triggering ON/OFF requests upon rising/falling threshold crossings. Its nRSTOUT pin delivers a controlled reset signal to the SoC, while MODE/RESET pin configures warm resets (voltage restoration only) or cold resets (full rail sequencing). These features ensure deterministic recovery from brownouts in industrial environments - a requirement explicitly validated for TPS6521909RSMR in PLC and smart meter applications.
TPS6521909RSMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Processor
- Current - Supply:
- 250µA
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
TPS6521909RSMR FAQ
1.How can I place an order for TPS6521909RSMR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6521909RSMR 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 TPS6521909RSMR reliable?
The price and inventory of TPS6521909RSMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6521909RSMR is usually 5 days.
3.What payment methods are accepted for TPS6521909RSMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6521909RSMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6521909RSMR?
TPS6521909RSMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6521909RSMR 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 TPS6521909RSMR?
For technical support, including TPS6521909RSMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6521909RSMR requirements.
6.How does Aetrix verify that TPS6521909RSMR is sourced from the original manufacturer or authorized distributors?
All TPS6521909RSMR 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 TPS6521909RSMR meets industry standards.
7.What is the process for return or replacement of TPS6521909RSMR?
All TPS6521909RSMR units undergo pre-shipment inspection (PSI). If there is an issue with TPS6521909RSMR, 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 TPS6521909RSMR part is unused and in its original packaging.
Return procedure for TPS6521909RSMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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