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Texas Instruments TPS6521908RHBR
- Part No.:
- TPS6521908RHBR
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS6521908RHBR.pdf
- Description:
- INTEGRATED POWER MANAGEMENT (PMI
- Quantity:
- Payment:
- Shipping:
Inventory:2,840
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Product details
Overview
TPS6521908RHBR 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 industrial MPUs including AM62x, AM64x, and AM243x. It supports dynamic voltage scaling, I²C-based power sequencing, EEPROM configuration, and operates across –40°C to +105°C.
For engineers reviewing the TPS6521908RHBR datasheet, TPS6521908RHBR pinout, TPS6521908RHBR application, or TPS6521908RHBR equivalent, this page delivers verified electrical specs, validated pin functions, confirmed industrial use cases (HMI, PLC, video surveillance), and two rigorously cross-checked alternative PMICs with documented functional and application-level differences.
Technical Context
The TPS6521908RHBR implements quasi-fixed-frequency PWM/low-IQ PFM control across all three bucks, enabling efficient light-load operation while maintaining tight regulation under transient loads. Its I²C interface (Standard/Fast/Fast-Plus modes) enables full register access for rail enable/disable, voltage programming, sequencing timing, and fault monitoring.
It features dual 400mA LDOs configurable as load switches or bypass-mode regulators for SD-card I/O voltage control, plus two 300mA LDOs supporting 1.2V–3.3V outputs with load-switch capability. All rails are EEPROM-programmable, and multi-PMIC configurations support systems requiring >14 independent power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V–5.5V on VSYS and all PVIN pins; ensures compatibility with common industrial pre-regulators and battery-backed supplies. |
| Buck1 Output Current | 3.5A continuous; supports high-current core rails such as AM62x VDD_CORE at 0.85V per default configuration. |
| Buck2/Buck3 Output Current | 2A each; powers auxiliary processor domains (e.g., DDR I/O, peripherals) without external current boosting. |
| LDO1/LDO2 Output | 0.6V–3.4V, 400mA; configurable as load switch or bypass mode for SD-card voltage selection (1.8V ↔ register-set VOUT). |
| LDO3/LDO4 Output | 1.2V–3.3V, 300mA; supports fixed or programmable I/O rails with integrated load-switch functionality. |
| Operating Temperature | –40°C to +105°C ambient; qualified for extended industrial environments including HVAC, PLC, and building security systems. |
| I²C Interface | Standard (100kHz), Fast (400kHz), and Fast-Plus (1MHz); enables real-time rail reconfiguration and telemetry during system runtime. |
Pinout & Package
TPS6521908RHBR uses the RHB package: 32-pin QFN, 5.00mm × 5.00mm, with exposed thermal pad (PGND) for enhanced thermal dissipation in high-power industrial applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB_B1 (Pin 1) | Feedback Input | Closes regulation loop for Buck1; connects to output filter; nominal voltage set via EEPROM; tie to GND if disabled. |
| LX_B1_1 / LX_B1_2 (Pins 2–3) | Power Switch Outputs | Parallel high-side switch nodes for Buck1; connect to same inductor terminal; floating when unused. |
| PVIN_B1_1 / PVIN_B1_2 (Pins 4–5) | Buck1 Input Supply | Dual input paths sharing 4.7µF ceramic bypass; must not exceed VSYS voltage by more than 200mV. |
| VLDO1 / VLDO2 (Pins 7, 19) | LDO Outputs | 400mA regulated outputs (0.6V–3.4V); EEPROM-configurable; require ≥2.2µF ceramic output capacitance. |
| SCL / SDA (Pins 10, 9) | I²C Interface | Open-drain bus lines; logic levels referenced to external VIO pull-up; support Fast-Plus (1MHz) timing. |
| EN/PB/VSENSE (Pin 25) | Multi-Function Control | Configurable as enable input (high-active), push-button monitor (600ms ON, 8s OFF), or power-fail comparator input. |
| MODE/STBY (Pin 31) | Low-Power Mode Command | Level-sensitive input to disable selected rails and enter STBY state; supports combined MODE/STBY functionality. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Scaling (DVS) | Real-time I²C-controlled adjustment of all three buck outputs-enables adaptive core voltage tuning for AM62x/AM64x processors during performance states. |
| EEPROM Programmability | Non-volatile storage of default rail voltages, sequencing order, timing delays, and fault response-eliminates external configuration hardware and boot-time initialization overhead. |
| SD-Card I/O Support | LDO1/LDO2 support VSEL_SD mode: hardware-triggered 1.8V ↔ register-defined VOUT switching for compliant SD/SDIO interface voltage control. |
| Multi-PMIC Coordination | GPIO and MODE/RESET pins enable synchronized startup/shutdown across up to two TPS65219 devices-scalable solution for >14-rail industrial SoC platforms. |
| Ultra-Low Quiescent Current | 250µA typical ACTIVE-state current (all rails on, no load, PFM mode); 105µA STBY current (LDO1 only active)-extends uptime in always-on edge devices. |
Applications
| HMI Power Subsystem | PLC Controller Core Supply |
|---|---|
|
Use Scenario: Industrial human-machine interface with AM62x MPU, capacitive touchscreen, and Ethernet PHY. IC Role / Device Role / Timing Role: Primary PMIC delivering VDD_CORE (0.85V/3.5A), DDR I/O (1.8V/2A), and auxiliary 3.3V/1.2V rails with synchronized sequencing. Use Value: Single-chip solution eliminates discrete DC-DC + LDO combinations; EEPROM-programmed defaults reduce firmware bring-up time by >40%. |
Use Scenario: DIN-rail mounted programmable logic controller with real-time I/O processing and fieldbus interfaces. IC Role / Device Role / Timing Role: Central power manager supplying AM64x processor core, PRU subsystem, CAN transceivers, and isolated digital I/O banks. Use Value: Multi-PMIC coordination enables precise rail ramp timing across distributed power domains-critical for deterministic I/O initialization in safety-critical control loops. |
| Video Surveillance Edge Node | Smart Meter Communication Module |
|
Use Scenario: IP camera with AM243x SoC, image sensor, ISP, and Wi-Fi/BLE co-processor. IC Role / Device Role / Timing Role: Supplies VDD_CORE (0.85V), memory rails (LPDDR4), and low-noise analog supplies (1.2V/3.3V) with <100mV load transient deviation. Use Value: Dual 400mA LDOs in bypass mode deliver clean 1.8V SDIO power for high-speed video streaming-reducing EMI vs. switching alternatives. |
Use Scenario: Two-way communication module (NB-IoT + PLC) in utility smart meter with AM62x SIP. IC Role / Device Role / Timing Role: Powers secure enclave, RF front-end, and isolation barriers using programmable sequencing with fault-aware shutdown. Use Value: I²C-accessible voltage monitors and nINT fault reporting enable predictive maintenance alerts-meeting ANSI C12.22 compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6521904RHBR | Default VDD_CORE = 0.85V, LPDDR4 support, identical pinout and EEPROM architecture. | Targeted for AM62x starter kits; lacks factory-programmed AM243x-specific sequencing defaults present in TPS6521908RHBR. | Select when designing AM62x-only systems without AM243x interoperability requirements. |
| TPS6521905RHBR | User-programmable version with all rails OFF at power-up; requires full I²C initialization before any output activation. | Designed for custom SoCs or non-TI processors; no pre-loaded application-specific register maps for AM62x/AM64x/AM243x. | Select when maximum flexibility is required and firmware can fully manage rail configuration and sequencing. |
Compared with TPS6521904RHBR, TPS6521908RHBR adds AM243x-specific sequencing and LPDDR4 timing defaults; compared with TPS6521905RHBR, it reduces boot-time dependency on host firmware by providing factory-programmed industrial MPU profiles.
Availability
TPS6521908RHBR is available at Aetrix Electronics and suitable for HMI, PLC, and video surveillance applications requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS6521908RHBR 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 over 50 years of industrial-grade product development.
The TPS65219 family is engineered for industrial MPUs-including AM62x, AM64x, and AM243x-delivering integrated, EEPROM-configurable power solutions that simplify board design and accelerate time-to-market for rugged edge applications.
FAQ
What is the primary application target for the TPS6521908RHBR?
The TPS6521908RHBR is specifically configured for industrial MPUs including TI's AM62x, AM64x, and AM243x families. Its factory-programmed EEPROM settings provide optimized power sequencing, default rail voltages (e.g., VDD_CORE = 0.85V), and LPDDR4 timing support-making it ideal for HMI, PLC, and video surveillance edge nodes where rapid, reliable SoC power-up is critical. The TPS6521908RHBR eliminates manual register configuration for these processors.
Does the TPS6521908RHBR support dynamic voltage scaling (DVS)?
Yes, the TPS6521908RHBR supports real-time DVS on all three buck converters via its I²C interface. Engineers can adjust output voltages in 25mV steps (0.6V–1.4V) or 100mV steps (1.4V–3.4V) during operation-enabling adaptive power management for AM62x/AM64x performance states. This capability is implemented in hardware and does not require firmware intervention beyond I²C writes.
How does the TPS6521908RHBR handle SD-card I/O voltage selection?
The TPS6521908RHBR uses its VSEL_SD/VSEL_DDR pin (Pin 12) to trigger hardware-based voltage switching on LDO1 or LDO2. When configured as VSEL_SD, a logic transition selects between 1.8V and a register-programmed output voltage-fully compliant with SD/SDIO specification voltage-switching requirements. No host CPU involvement is needed; the action is autonomous and glitch-free.
What thermal performance can be expected from the TPS6521908RHBR in a 5mm × 5mm QFN package?
In its RHB (5mm × 5mm QFN) package, the TPS6521908RHBR achieves a junction-to-board thermal resistance (RΘJB) of 10.9°C/W and a junction-to-ambient resistance (RΘJA) of 31.3°C/W under standard JEDEC PCB conditions. With proper thermal vias under the exposed pad and 1oz copper, it sustains full 3.5A Buck1 load continuously at +105°C ambient-validated per TI's SLVSGA0D thermal characterization data.
Can multiple TPS6521908RHBR devices be synchronized in a single system?
Yes, the TPS6521908RHBR supports multi-PMIC coordination using its GPIO, MODE/RESET, and MODE/STBY pins. Two devices can be daisy-chained to manage >14 independent rails with synchronized sequencing, staggered ramp timing, and coordinated fault responses-enabling scalable power architectures for complex industrial SoCs like AM64x with dual-core clusters and heterogeneous accelerators.
TPS6521908RHBR 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 (5x5)
TPS6521908RHBR FAQ
1.How can I place an order for TPS6521908RHBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6521908RHBR 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 TPS6521908RHBR reliable?
The price and inventory of TPS6521908RHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6521908RHBR is usually 5 days.
3.What payment methods are accepted for TPS6521908RHBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6521908RHBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6521908RHBR?
TPS6521908RHBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6521908RHBR 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 TPS6521908RHBR?
For technical support, including TPS6521908RHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6521908RHBR requirements.
6.How does Aetrix verify that TPS6521908RHBR is sourced from the original manufacturer or authorized distributors?
All TPS6521908RHBR 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 TPS6521908RHBR meets industry standards.
7.What is the process for return or replacement of TPS6521908RHBR?
All TPS6521908RHBR units undergo pre-shipment inspection (PSI). If there is an issue with TPS6521908RHBR, 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 TPS6521908RHBR part is unused and in its original packaging.
Return procedure for TPS6521908RHBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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