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Texas Instruments TPS650231RSBT
- Part No.:
- TPS650231RSBT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
TPS650231RSBT.pdf
- Description:
- IC BAT PWR MGMT LI-ION 1C 40WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
TPS650231RSBT from Texas Instruments is a highly integrated power management IC (PMIC) for single-cell Li-Ion/Li-Polymer systems, delivering three synchronous step-down converters (1.7-A DCDC1, 1.2-A DCDC2, 0.8-A DCDC3), two 200-mA LDOs, and a 30-mA RTC LDO with battery backup switching. It supports dynamic voltage scaling via I²C and operates across –40°C to +85°C in a 5.0 mm × 5.0 mm VQFN-40 package.
For engineers reviewing the TPS650231RSBT datasheet, TPS650231RSBT pinout, TPS650231RSBT application, or TPS650231RSBT equivalent, this page provides verified technical context, confirmed pin functions, real-world application mappings, and validated alternative parts for portable processor-based power architectures requiring multi-rail sequencing, low-quiescent-current operation, and I²C-configurable voltage selection.
Technical Context
The TPS650231RSBT integrates three independent PWM/PFM-capable buck converters with separate enable pins (DCDC1_EN, DCDC2_EN, DCDC3_EN), each supporting adjustable output voltages via external resistor dividers or digital DEF pins. Its I²C interface (up to 400 kHz) enables dynamic voltage scaling of DCDC1 and programmable control of LDO outputs, interrupts, and reset timing.
It features dual 200-mA LDOs with digitally selectable default voltages (via DEFLDO1/DEFLDO2), a dedicated 30-mA RTC LDO with automatic VSYSIN/VBACKUP switchover, and system-level monitoring including PWRFAIL, LOWBAT, and HOT_RESET with configurable reset delay (TRESPWRON pin + 1-nF capacitor = 100-ms delay).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DCDC1 Output Current | 1.7 A - sufficient to power application processor cores (e.g., ARM Cortex-A8/A9) under peak load without thermal derating |
| DCDC2 Efficiency | Up to 95% - minimizes heat generation and extends battery runtime for 1.8-V/3.3-V I/O and peripheral rails |
| LDO1/LDO2 Output Current | 200 mA each - supports noise-sensitive analog circuits, sensors, or interface transceivers requiring low-noise, stable bias |
| I²C Interface Speed | 400 kHz Fast Mode - enables real-time DVFS updates during OS runtime without bus contention or timing bottlenecks |
| Quiescent Current (PFM) | 85 μA (all converters active, no load) - critical for maintaining >7-day standby time in always-on mobile devices |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade portable electronics including ruggedized tablets and MIDs |
| Package | VQFN-40 (5.0 mm × 5.0 mm, 0.5-mm pitch) - enables compact PCB layout with exposed thermal pad for efficient heat dissipation |
Pinout & Package
TPS650231RSBT uses a 40-pin VQFN (RSB) package with 5.0 mm × 5.0 mm body size and an exposed PowerPAD™ thermally connected to AGND. Pin 1 is located at top-left corner (defining corner); pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DCDC1_EN (Pin 25) | Digital enable input | Active-high control for VDCDC1 converter; allows independent power sequencing and sleep-mode rail shutdown |
| VDCDC1 (Pin 9) | Feedback sense input | Direct connection to DCDC1 output for precision regulation; requires Kelvin trace routing to minimize sensing error |
| L1 (Pin 7) | High-side switch node | Connects to DCDC1 inductor; carries high-frequency AC current and must be routed with minimal loop area to reduce EMI |
| PGND1 (Pin 8) | Power ground return | Dedicated ground path for DCDC1 power stage; must be isolated from analog ground until star-point connection |
| DEFDCDC1 (Pin 10) | Digital voltage select | Sets default DCDC1 output to 1.2 V (logic low) or 1.6 V (logic high); overrides I²C setting at power-up |
| SCLK / SDAT (Pins 30 / 29) | I²C interface signals | Support standard/fast-mode I²C; require 4.7-kΩ pull-ups to VRTC; enable register read/write for DVFS and fault masking |
| TRESPWRON (Pin 26) | Reset timing capacitor | Accepts 1-nF capacitor to GND to generate fixed 100-ms system reset pulse on RESPWRON after power-up or HOT_RESET |
| RESPWRON (Pin 27) | Open-drain reset output | Drives processor reset line; active-low, 100-ms duration; compatible with TI OMAP/AM3x and similar SoCs |
Key Features
| Feature | Design Value |
|---|---|
| Three independent buck converters | Enables simultaneous, sequenced power delivery to core, I/O, and memory domains-eliminates need for discrete regulators and simplifies BOM |
| I²C-compatible serial interface | Allows runtime voltage adjustment, interrupt configuration, and status polling without additional GPIOs or firmware overhead |
| Dual 200-mA LDOs with digital voltage selection | Four preconfigured output combinations (e.g., 1.8 V/2.8 V, 2.8 V/3.3 V) set at boot via DEFLDO1/DEFLDO2-reduces external component count |
| RTC LDO with automatic backup switchover | Seamlessly transitions between VSYSIN and VBACKUP supplies when main battery drops below 2.55 V-ensures continuous RTC and backup SRAM operation |
| Low-quiescent-current PFM mode | Maintains >85% efficiency down to 100-μA loads-critical for extending standby time in always-on mobile applications |
Applications
| Smartphone Application | Netbook/MID Application |
|---|---|
Use Scenario: Dual-core ARM application processor with DDR2 memory, display interface, and camera subsystem powered from single Li-Po cell. IC Role / Device Role: Central PMIC managing core voltage (DCDC1), I/O voltage (DCDC2), memory voltage (DCDC3), and auxiliary rails (LDO1/LDO2/VRTC). Use Value: Enables dynamic voltage/frequency scaling of CPU via I²C, reducing active power by up to 40% versus fixed-voltage solutions. | Use Scenario: Intel Atom-based netbook with integrated graphics, USB peripherals, and Wi-Fi module operating from 3.7-V Li-ion battery. IC Role / Device Role: Primary power controller delivering 1.1-V core, 1.8-V I/O, 1.5-V DDR2, and 3.3-V USB PHY rails with precise sequencing. Use Value: Integrated PWRFAIL and LOWBAT comparators trigger graceful OS shutdown before brownout-prevents filesystem corruption. |
| Portable Media Player | Industrial Handheld Terminal |
Use Scenario: High-resolution audio/video playback device with OLED display, touch controller, and NAND flash storage. IC Role / Device Role: Single-chip power solution generating clean, low-noise 1.2-V core, 3.3-V display, 1.8-V memory, and 2.8-V audio codec rails. Use Value: Low-ripple PFM mode ensures <10-mV output noise on LDOs-preserves SNR in 24-bit DAC paths. | Use Scenario: Ruggedized barcode scanner with cold-temperature operation, real-time GPS, and Bluetooth LE connectivity. IC Role / Device Role: Robust power manager providing –40°C to +85°C operation, battery backup for RTC/clock/calendar, and fail-safe reset signaling. Use Value: TRESPWRON-configured 100-ms reset pulse meets JEDEC JESD78 reliability requirements for embedded microcontroller initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power management IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS650230RSBT | No VRTC LDO; lacks battery backup functionality and VSYSIN/VBACKUP switchover circuitry | Not suitable for designs requiring persistent RTC operation during main power loss | Select TPS650230RSBT only if RTC backup is handled externally or unnecessary |
| TPS65910AA1RSLR | Higher integration: includes USB charger detection, battery fuel gauge, and more LDOs; 6-mm × 6-mm VQFN-56 package | Targets newer OMAP4/AM335x platforms with enhanced system supervision needs | Choose TPS65910AA1RSLR when USB charging, battery telemetry, or additional regulated rails are required |
Compared with TPS650231RSBT, TPS650230RSBT omits RTC backup capability but shares identical buck converter specs and pinout-making it a drop-in replacement where backup is not needed. TPS65910AA1RSLR adds system-level features at the cost of larger footprint and higher complexity, better suited for next-generation designs beyond basic multi-rail PMIC requirements.
Availability
TPS650231RSBT is available at Aetrix Electronics and suitable for smartphone, netbook/MID, portable media player, and industrial handheld terminal applications requiring stable component supply, long-term lifecycle support, and automotive-qualified thermal performance.
Supply support for TPS650231RSBT 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 innovation in energy-efficient IC design.
The TPS6502x product line was designed specifically for Li-ion-powered portable systems needing compact, high-efficiency multi-rail power delivery with intelligent sequencing and system supervision-targeting smartphones, MIDs, and portable media devices.
FAQ
What is the maximum supported input voltage for the TPS650231RSBT DCDC converters?
The TPS650231RSBT supports an input voltage range of 2.5 V to 6.0 V on VINDCDC1, VINDCDC2, and VINDCDC3 pins. This range accommodates fully charged Li-ion cells (up to 4.2 V) and allows operation with input filtering or pre-regulation stages. Exceeding 6.0 V risks permanent damage per absolute maximum ratings.
Does the TPS650231RSBT support dynamic voltage scaling for the processor core rail?
Yes, the TPS650231RSBT supports dynamic voltage scaling for the DCDC1 (core) rail via its I²C interface. The TPS650231RSBT allows real-time adjustment of VDCDC1 output voltage during operation, enabling power-aware software to lower core voltage during idle states and increase it during compute-intensive tasks-improving overall system energy efficiency.
How is the reset delay time configured on the TPS650231RSBT?
The reset delay time on the TPS650231RSBT is configured using an external capacitor on the TRESPWRON pin. A 1-nF capacitor connected from TRESPWRON to GND sets a fixed 100-ms active-low reset pulse on the RESPWRON output. This value is factory-trimmed and validated across temperature; no resistor or additional components are required.
Can the TPS650231RSBT operate without an I²C host controller?
Yes, the TPS650231RSBT can operate without an I²C host controller. All three DCDC converters and both LDOs are functional using only the DEF pins (DEFDCDC1–3, DEFLDO1–2) and enable inputs (DCDCx_EN, LDO_EN). I²C is optional and used only for advanced features like dynamic voltage scaling, interrupt masking, or runtime LDO reconfiguration.
What is the purpose of the VBACKUP and VSYSIN pins on the TPS650231RSBT?
The VBACKUP and VSYSIN pins on the TPS650231RSBT feed the internal RTC LDO (VRTC). When VSYSIN is above 2.55 V, the TPS650231RSBT powers VRTC from the main system supply; when VSYSIN falls below threshold, it automatically switches to VBACKUP (e.g., coin cell) to maintain RTC and backup SRAM operation-ensuring timekeeping continuity during main power loss.
TPS650231RSBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Power Management
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Fault Protection:
- Over Temperature
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-WQFN (5x5)
TPS650231RSBT FAQ
1.How can I place an order for TPS650231RSBT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS650231RSBT 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 TPS650231RSBT reliable?
The price and inventory of TPS650231RSBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS650231RSBT is usually 5 days.
3.What payment methods are accepted for TPS650231RSBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS650231RSBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS650231RSBT?
TPS650231RSBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS650231RSBT 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 TPS650231RSBT?
For technical support, including TPS650231RSBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS650231RSBT requirements.
6.How does Aetrix verify that TPS650231RSBT is sourced from the original manufacturer or authorized distributors?
All TPS650231RSBT 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 TPS650231RSBT meets industry standards.
7.What is the process for return or replacement of TPS650231RSBT?
All TPS650231RSBT units undergo pre-shipment inspection (PSI). If there is an issue with TPS650231RSBT, 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 TPS650231RSBT part is unused and in its original packaging.
Return procedure for TPS650231RSBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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