My Inquiry
My Account
Texas Instruments TPS6521903RSMR
- Part No.:
- TPS6521903RSMR
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS6521903RSMR.pdf
- Description:
- INTEGRATED POWER MANAGEMENT (PMI
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS6521903RSMR from Texas Instruments is a programmable Power Management IC (PMIC) engineered for industrial SoCs including AM62x and AM64x processors. It integrates three synchronous buck converters (1×3.5A, 2×2A) and four LDOs (2×400mA, 2×300mA), supports dynamic voltage scaling, I²C-based power sequencing, and operates across –40°C to +105°C for HMI and PLC applications.
For engineers reviewing the TPS6521903RSMR datasheet, TPS6521903RSMR pinout, TPS6521903RSMR application, or TPS6521903RSMR equivalent, this page delivers verified electrical specs, validated RSM package mapping, confirmed EEPROM-programmable rail defaults, and real-world sequencing behavior for AM62x DDR4-based designs.
Technical Context
The TPS6521903RSMR implements quasi-fixed-frequency PWM/PFM control with dynamic voltage scaling on all three bucks, enabling adaptive core voltage regulation during processor load transitions. Its I²C interface supports standard, fast-mode, and fast-mode+ speeds up to 1 MHz, allowing full register access for sequencing, monitoring, and fault handling.
It features two 400mA LDOs configurable as load switches or bypass-mode regulators for SD-card I/O voltage selection (VSEL_SD), and two 300mA LDOs supporting 1.2V–3.3V outputs with load-switch capability. All rails are configured via non-volatile memory (NVM) with default settings optimized for AM62x DDR4 systems.
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 input with ≤200mV differential tolerance between PVIN and VSYS. |
| Buck1 Output Current | 3.5A continuous - sufficient for AM62x VDD_CORE (0.75V) with margin under thermal derating in RSM package (RθJA = 31.9°C/W). |
| Buck2/Buck3 Output Current | 2A each - powers DDR4 termination (VTT) and auxiliary rails like VDD_DDR or VDDA in AM62x reference designs. |
| LDO1/LDO2 Output | 0.6V–3.4V, 400mA - supports SD-card I/O voltage switching (1.8V/3.3V) and configurable bypass mode for low-dropout operation. |
| LDO3/LDO4 Output | 1.2V–3.3V, 300mA - supplies processor I/O banks or auxiliary peripherals with load-switch capability for controlled enable/disable. |
| Operating Temperature | –40°C to +105°C ambient - qualified for industrial environments including HVAC controllers and protection relays without derating. |
| I²C Interface Speed | Up to 1 MHz (fast-mode+) - enables rapid configuration of sequencing states and real-time rail monitoring during system boot and runtime. |
Pinout & Package
TPS6521903RSMR uses a 32-pin QFN package (RSM) measuring 4.00mm × 4.00mm with exposed thermal pad (PGND). The package supports high-density industrial PCB layouts and provides 2.9°C/W junction-to-board thermal resistance for reliable operation at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB_B1 (Pin 1) | Buck1 Feedback Input | Connects to Buck1 output filter; sets regulated VOUT via resistor divider; nominal voltage stored in EEPROM. |
| LX_B1_1 / LX_B1_2 (Pins 2–3) | Buck1 Switch Node | Parallel switch outputs for low-impedance connection to 470nH inductor; reduces conduction loss and EMI. |
| PVIN_B1_1 / PVIN_B1_2 (Pins 4–5) | Buck1 Input Power | Dual input pins share 4.7µF ceramic bypass; must not exceed VSYS by more than 200mV. |
| VSEL_SD/VSEL_DDR (Pin 12) | Multi-function Select Pin | Configurable as SD-card I/O voltage selector (1.8V ↔ register-set VOUT) or DDR voltage select (1.2V/1.35V/floating). |
| EN/PB/VSENSE (Pin 25) | Enable / Push-button / Sense Input | Three modes: logic-enable (high), 600ms ON/8s OFF push-button, or pre-regulator power-fail detection via resistor divider. |
| MODE/STBY (Pin 31) | Low-power Mode Control | Level-sensitive input to disable selected rails and enter STBY state; combinable with MODE function for PWM/ PFM control. |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM Programmability | Non-volatile memory stores default rail voltages, sequencing order, and fault thresholds - eliminates external configuration components and enables field-updatable power policies. |
| Dynamic Voltage Scaling (DVS) | All three buck converters support real-time VOUT adjustment via I²C - enables AM62x core voltage scaling during DVFS transitions without hardware changes. |
| SD-Card I/O Support | LDO1/LDO2 operate in bypass mode with VSEL_SD pin to toggle between 1.8V and 3.3V - meets SD 3.0/4.0 signaling requirements without discrete switches. |
| Multi-PMIC Coordination | GPIO and MODE/RESET pins synchronize sequencing across ≥2 TPS65219 devices - supports systems requiring >14 rails (e.g., AM64x dual-core + peripheral domains). |
| Low Quiescent Current | 250µA typical in ACTIVE state (all rails on, no load, PFM mode) - extends uptime in always-on industrial gateways and edge nodes. |
Applications
| AM62x-Based HMI Panel | Industrial PLC CPU Module |
|---|---|
Use Scenario: Touchscreen HMI with AM62x SoC, DDR4 memory, and SD card for firmware updates. IC Role / Device Role: Primary PMIC supplying VDD_CORE (0.75V), DDR4 VDD/VTT (1.2V/0.6V), and SD-card I/O (1.8V/3.3V) with synchronized sequencing. Use Value: Eliminates 12 discrete regulators; leverages VSEL_SD for automatic SD voltage switching and EEPROM-stored defaults for rapid design reuse. |
Use Scenario: DIN-rail mounted PLC with AM62x, isolated I/O, and real-time Ethernet. IC Role / Device Role: Central power controller managing core, memory, PHY, and auxiliary rails with watchdog-triggered reset via nRSTOUT and MODE/RESET. Use Value: Reduces BOM count by 8+ components; supports -40°C to +105°C operation without derating; enables cold/warm reset via configurable MODE/RESET pin. |
| Building Security Controller | Video Surveillance Edge Node |
Use Scenario: IP camera controller with AM62x, image sensor, and PoE-powered subsystem. IC Role / Device Role: Supplies VDD_CORE, DDR4, sensor analog bias (via LDO3/LDO4), and PoE interface logic with precise UV/OVP monitoring on VSYS. Use Value: Integrated voltage monitors detect pre-regulator faults before brownout; GPO1/GPO2 drive external enable signals for PoE PD and sensor modules. |
Use Scenario: AI-accelerated edge node running AM62x + NPU, with multi-sensor inputs and LTE/Wi-Fi connectivity. IC Role / Device Role: Powers heterogeneous compute domains (core, NPU, memory, I/O) with independent DVS and rail-specific sequencing delays. Use Value: I²C-configurable sequencing ensures safe power-up of NPU before host SoC; LDO bypass mode minimizes dropout for sensor analog supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6521904RSMR | Default VDD_CORE = 0.85V (vs. 0.75V in TPS6521903RSMR); identical pinout, package, and feature set. | Targeted at AM62x/AM64x systems using LPDDR4 or higher-core-voltage DDR4 configurations. | Select when SoC VDD_CORE requirement is 0.85V; no layout change required, but EEPROM reprogramming needed for rail defaults. |
| TPS6521905RSMR | User-programmable version with all rails disabled at power-up; requires full I²C initialization before operation. | Suitable for custom SoCs or multi-processor platforms where fixed defaults are insufficient. | Choose for maximum flexibility in non-TI-SoC designs; adds software bring-up complexity but avoids NVM dependency on pre-defined use cases. |
Compared with TPS6521904RSMR, the TPS6521903RSMR offers out-of-box compatibility with AM62x DDR4 reference designs requiring 0.75V VDD_CORE, while TPS6521905RSMR shifts configuration burden to firmware - making TPS6521903RSMR optimal for production-ready industrial AM62x deployments.
Availability
TPS6521903RSMR is available at Aetrix Electronics and suitable for industrial HMIs, PLC CPU modules, and building security controllers requiring stable component supply, extended temperature operation, and AM62x-optimized power sequencing.
Supply support for TPS6521903RSMR 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 reliability validation.
The TPS65219 product line delivers highly integrated, EEPROM-programmable PMICs for TI's Sitara™ AM62x/AM64x/AM243x processors - designed to reduce power design complexity in space-constrained, thermally demanding industrial edge applications.
FAQ
What is the default VDD_CORE output voltage configured in TPS6521903RSMR?
The TPS6521903RSMR is factory-programmed with a default VDD_CORE output of 0.75V on Buck1, aligned with AM62x DDR4 reference designs. This value is stored in non-volatile memory and can be modified via I²C write to the appropriate rail configuration register. The TPS6521903RSMR datasheet confirms this setting in Table 4-1 and Section 6.6.
Does TPS6521903RSMR support SD-card I/O voltage switching?
Yes, TPS6521903RSMR supports SD-card I/O voltage switching through LDO1 and LDO2, which are configurable as bypass-mode regulators. When VSEL_SD/VSEL_DDR (Pin 12) is asserted, these LDOs toggle between 1.8V and a register-defined VOUT - meeting SD 3.0/4.0 signaling requirements without external circuitry.
Can TPS6521903RSMR operate across the full industrial temperature range?
Yes, TPS6521903RSMR is characterized and guaranteed to operate from –40°C to +105°C ambient temperature. Its thermal design (RθJB = 10.5°C/W in RSM package) and internal protections (UVLO, OVP, thermal shutdown) ensure reliable performance in uncontrolled environments such as factory floors and outdoor enclosures.
How does the EN/PB/VSENSE pin function in TPS6521903RSMR?
The EN/PB/VSENSE pin (Pin 25) serves three mutually exclusive modes: logic-level enable (high = ON), push-button monitor (600ms low = ON, 8s low = OFF), or power-fail sense input (resistor-divider monitored for pre-regulator brownout). Mode selection is fixed at power-up based on external pull configuration and cannot be changed dynamically.
Is TPS6521903RSMR pin-compatible with other TPS65219 variants?
Yes, all TPS65219 variants-including TPS6521903RSMR, TPS6521904RSMR, and TPS6521905RSMR-share identical 32-pin RSM (4mm × 4mm) and RHB (5mm × 5mm) QFN packages and pinouts. Mechanical and electrical compatibility is confirmed in TI's SLVSGA0D datasheet Section 5 and Package Information table.
TPS6521903RSMR 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)
TPS6521903RSMR FAQ
1.How can I place an order for TPS6521903RSMR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6521903RSMR 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 TPS6521903RSMR reliable?
The price and inventory of TPS6521903RSMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6521903RSMR is usually 5 days.
3.What payment methods are accepted for TPS6521903RSMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6521903RSMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6521903RSMR?
TPS6521903RSMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6521903RSMR 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 TPS6521903RSMR?
For technical support, including TPS6521903RSMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6521903RSMR requirements.
6.How does Aetrix verify that TPS6521903RSMR is sourced from the original manufacturer or authorized distributors?
All TPS6521903RSMR 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 TPS6521903RSMR meets industry standards.
7.What is the process for return or replacement of TPS6521903RSMR?
All TPS6521903RSMR units undergo pre-shipment inspection (PSI). If there is an issue with TPS6521903RSMR, 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 TPS6521903RSMR part is unused and in its original packaging.
Return procedure for TPS6521903RSMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS6521903RSMR Tags
-
TPS2511DGNR
Texas Instruments
-
UTC2000/MG
Microchip Technology
-
TUSB320HAIRWBR
Texas Instruments
-
TPS61252DSGR
Texas Instruments
-
PI5USB30216CXUAEX
Diodes Incorporated
-
SN6501DBVR
Texas Instruments
-
CYPD3177-24LQXQT
Infineon Technologies
-
SN6501QDBVRQ1
Texas Instruments
-
STUSB1600AQTR
STMicroelectronics
-
SN6505BDBVR
Texas Instruments
-
SN6501DBVT
Texas Instruments
-
TPS65150PWPR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
