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Texas Instruments TPS650245RHBT
- Part No.:
- TPS650245RHBT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS650245RHBT.pdf
- Description:
- IC BAT PWR MGMT LI-ION 1C 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
TPS650245RHBT 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 (1.0-A VDCDC1, 0.8-A VDCDC2, 0.8-A VDCDC3) and three LDOs (two 200-mA general-purpose, one 30-mA Vdd_alive), with fixed-core voltage options of 0.9 V / 1.1 V selected via DEFDCDC3 pin, used in ARM-based portable processors.
For engineers reviewing the TPS650245RHBT datasheet, TPS650245RHBT pinout, TPS650245RHBT application, or TPS650245RHBT equivalent, key selection criteria include core voltage accuracy (±1% at 0.9 V/1.1 V), 2.25-MHz switching frequency for compact filter design, 85-μA quiescent current in PFM mode, and independent enable control per DC-DC channel for dynamic power sequencing.
Technical Context
The TPS650245RHBT integrates three buck converters operating in either pulse-frequency modulation (PFM) at light loads or forced pulse-width modulation (PWM) when MODE pin is high-enabling efficiency optimization across 10 μA to 1 A load range. Each converter features internal P- and N-channel MOSFETs with ON-resistances specified at 310–698 mΩ (P-ch) and 220–503 mΩ (N-ch) for VDCDC3.
Core voltage scaling is implemented via the binary DEFDCDC3 input: logic LOW sets VDCDC3 to 0.9 V, HIGH sets it to 1.1 V-both values confirmed for TPS650245 only. The 30-mA Vdd_alive LDO delivers 1.1 V ±1% output, while VLDO1/VLDO2 support externally adjustable outputs from 1.0 V to 3.3 V using resistor dividers on FB_LDO1/FB_LDO2 pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDCDC1 Output | 3.3 V or 2.8 V (fixed) or adjustable 0.6–VINDCDC1; ±1% accuracy in PWM mode supports stable I/O rail generation |
| VDCDC3 Output | 0.9 V (DEFDCDC3 = LOW) or 1.1 V (DEFDCDC3 = HIGH); ±1% tolerance enables precise ARM Cortex-A8/A9 core biasing |
| Switching Frequency | 2.25 MHz ±12%; allows use of small 2.2-μH inductors and 10–22-μF ceramic output capacitors for space-constrained PCBs |
| Quiescent Current | 85 μA typical (all DC-DCs + LDOs active, PFM mode); extends battery runtime in standby states of handheld devices |
| Thermal Shutdown | 160 °C activation with 20 °C hysteresis; protects against sustained overload or poor heatsinking in sealed enclosures |
| UVLO Threshold | 2.35 V ±3% on VCC; prevents erratic operation during battery brownout while allowing full discharge down to ~3.0 V system cutoff |
| PWRFAIL Comparator | 1.0 V ±2% threshold on PWRFAIL_SNS; generates early warning signal before system reset for controlled data save in GPS or PDA applications |
Pinout & Package
TPS650245RHBT is housed in a thermally enhanced 32-pin VQFN package (5.0 mm × 5.0 mm, 0.5-mm pitch) with exposed PowerPad tied to AGND for low thermal resistance (RθJB = 6.2 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDCDC3 | Feedback sense input | Direct connection to VDCDC3 output node; enables precise regulation of 0.9 V/1.1 V core rail |
| DEFDCDC3 | Core voltage select input | Binary control: LOW = 0.9 V, HIGH = 1.1 V; no external pull required-driven by host processor GPIO |
| EN_DCDC3 | Enable input | Active-high logic; allows independent power-up sequencing of core domain after memory and I/O rails are stable |
| L3 | Switch node | Connects to 2.2-μH inductor; carries high di/dt switching current-requires tight layout with short trace to PGND3 |
| PGND3 | Power ground | Dedicated ground return for VDCDC3 power stage; isolated from analog grounds (AGND1/AGND2) to minimize noise coupling |
| VINLDO | LDO input supply | Accepts 1.5–6.5 V; may be fed from VDCDC2 (memory rail) or directly from battery for flexible LDO sourcing |
| FB_LDO1 | LDO1 feedback | Resistor divider from VLDO1 to AGND sets output voltage; internal 1-V reference enables 1.0–3.3 V programmability |
Key Features
| Feature | Design Value |
|---|---|
| Three independent buck converters | Enables staggered power sequencing: VDCDC1 (I/O) → VDCDC2 (memory) → VDCDC3 (core), reducing inrush current and avoiding supply contention |
| Dynamic core voltage selection | DEFDCDC3 pin allows runtime switching between 0.9 V (low-power idle) and 1.1 V (performance mode) without firmware update or hardware change |
| Ultra-low quiescent current | 85 μA in full-standby (all converters + LDOs enabled, PFM active) extends battery life in always-on GPS or sensor nodes |
| Dedicated Vdd_alive LDO | 30-mA 1.1-V output maintains RTC and wake logic during deep sleep-critical for fast resume in smartphones and PDAs |
| Integrated power-fail detection | PWRFAIL_SNS comparator with 1.0-V threshold and 50-mV hysteresis provides reliable low-battery alert before brownout resets system |
Applications
| Smartphone Baseband Processor | GPS Navigation Device |
|---|---|
Use Scenario: Powers ARM9/ARM11 application processor with dynamic voltage/frequency scaling (DVFS) in 3G/4G handsets. IC Role / Device Role / Timing Role: PMIC supplies VDCDC3 (core), VDCDC1 (I/O), VDCDC2 (SDRAM), VLDO1 (camera interface), and Vdd_alive (RTC backup). Use Value: DEFDCDC3-selectable 0.9 V/1.1 V core rail reduces active power by 35% at 0.9 V while maintaining timing closure at 600 MHz. | Use Scenario: Provides regulated rails for SiRFstarIV or u-blox GPS SoC in automotive or portable navigation units. IC Role / Device Role / Timing Role: Delivers 1.1 V core, 3.3 V I/O, 1.8 V memory, and 1.1 V Vdd_alive to maintain GPS almanac and position fix during battery transitions. Use Value: PWRFAIL comparator triggers graceful shutdown at 3.2 V battery voltage, preserving last-known location before power loss. |
| Digital Still Camera | PDA with ARM Cortex-A8 |
Use Scenario: Powers image sensor, ISP, and SD card interface in compact digital cameras with Li-ion battery. IC Role / Device Role / Timing Role: VDCDC1 (3.3 V) drives lens actuator and display; VDCDC2 (1.8 V) powers DDR2 memory; VDCDC3 (0.9 V) supplies image processor core. Use Value: 2.25-MHz switching frequency permits use of 2.2-μH shielded inductors under 2 mm height-meeting strict Z-axis constraints. | Use Scenario: Supports Windows Mobile or Android PDA platforms requiring multiple voltage domains and long battery life. IC Role / Device Role / Timing Role: Manages power sequencing for OMAP3 or i.MX51 SoC: VDCDC3 (1.1 V core), VDCDC1 (3.3 V USB/I²C), VLDO2 (2.8 V LCD bias), Vdd_alive (1.1 V real-time clock). Use Value: Independent EN_DCDCx pins allow software-controlled rail enable/disable-reducing leakage current by >90% in suspend-to-RAM states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power management IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS650244RHBT | Fixed VDCDC3 output of 1.55 V / 1.6 V (vs. TPS650245's 0.9 V / 1.1 V); higher VDCDC1 current rating (800 mA vs. 1000 mA) | Targeted at higher-voltage Cortex-A5/A7 cores; not suitable for sub-1.0 V DVFS implementations | Select TPS650244RHBT only if core voltage requirement exceeds 1.1 V and memory rail needs 1.6-A capability |
| TPS650241RHBT | VDCDC3 outputs 0.9 V / 1.375 V; VDCDC1 rated for 1.6 A (vs. 1.0 A); same 32-pin VQFN package and pinout | Supports higher-performance applications like early OMAP4 or dual-core ARM Cortex-A9 with larger memory bandwidth | Choose TPS650241RHBT when system requires >1.0-A I/O rail current and 1.375-V core voltage for performance-critical workloads |
Compared with TPS650244RHBT and TPS650241RHBT, the TPS650245RHBT offers the lowest core voltage option (0.9 V) for maximum energy efficiency in ultra-low-power ARM Cortex-M3/M4 or entry-level smartphone basebands, while retaining identical footprint and control interface compatibility within the TPS65024x family.
Availability
TPS650245RHBT is available at Aetrix Electronics and suitable for smartphone baseband processors, GPS navigation devices, digital still cameras, and ARM-based PDAs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS650245RHBT 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies for industrial, automotive, and consumer markets.
The TPS65024x product line was designed specifically for Li-ion-powered portable electronics-integrating multiple DC-DC converters and LDOs into a single 5-mm × 5-mm VQFN to replace discrete power solutions in space- and efficiency-constrained handheld devices.
FAQ
What output voltages does the TPS650245RHBT support for its core DC-DC converter (VDCDC3)?
The TPS650245RHBT supports two fixed output voltages for VDCDC3: 0.9 V when DEFDCDC3 is logic LOW, and 1.1 V when DEFDCDC3 is logic HIGH. These values are specific to the TPS650245RHBT variant and differ from other members of the TPS65024x family. No external resistor programming is required-voltage selection is purely digital and verified in the SLVS774C datasheet revision January 2016.
Does the TPS650245RHBT require external components for basic operation?
Yes, the TPS650245RHBT requires external components: three inductors (L1–L3, 2.2 μH each), six ceramic capacitors (10–22 μF for DC-DC outputs, 1–2.2 μF for inputs and LDOs), and resistor dividers for VLDO1/VLDO2 if non-default voltages are needed. The VCC bypass capacitor (1 μF) and PWRFAIL_SNS pull-up resistor are also mandatory per the datasheet schematic guidelines.
How does the MODE pin affect efficiency and noise performance of the TPS650245RHBT?
When MODE = LOW, the TPS650245RHBT operates in power-safe mode-using PFM at light loads (<10 mA) for peak efficiency (up to 97%) and PWM above that threshold. When MODE = HIGH, all three DC-DCs force PWM mode regardless of load, improving ripple and transient response but increasing quiescent current to ~2.5 mA. This trade-off is critical for noise-sensitive audio or RF sections.
Can the TPS650245RHBT's LDOs be used to power analog circuitry such as ADC references or sensors?
Yes, the two 200-mA LDOs (VLDO1, VLDO2) support output voltages from 1.0 V to 3.3 V with ±1% accuracy and <10-μs load regulation time-making them suitable for precision analog rails. However, the Vdd_alive LDO (1.1 V, 30 mA) is optimized for digital retention and lacks the PSRR or noise specs needed for high-resolution ADC references; dedicated low-noise LDOs are recommended for such use cases.
Is the TPS650245RHBT pin-compatible with other devices in the TPS65024x family?
Yes, all TPS65024x variants-including TPS650245RHBT, TPS650241RHBT, and TPS650244RHBT-share identical 32-pin VQFN (RHB) packaging and pinout. Functionally, EN_DCDCx, DEFDCDCx, FB_LDOx, and power terminals are electrically and physically interchangeable, enabling drop-in replacement where voltage and current requirements align with the specific variant's specifications.
TPS650245RHBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN 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, Under Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (5x5)
TPS650245RHBT FAQ
1.How can I place an order for TPS650245RHBT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS650245RHBT 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 TPS650245RHBT reliable?
The price and inventory of TPS650245RHBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS650245RHBT is usually 5 days.
3.What payment methods are accepted for TPS650245RHBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS650245RHBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS650245RHBT?
TPS650245RHBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS650245RHBT 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 TPS650245RHBT?
For technical support, including TPS650245RHBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS650245RHBT requirements.
6.How does Aetrix verify that TPS650245RHBT is sourced from the original manufacturer or authorized distributors?
All TPS650245RHBT 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 TPS650245RHBT meets industry standards.
7.What is the process for return or replacement of TPS650245RHBT?
All TPS650245RHBT units undergo pre-shipment inspection (PSI). If there is an issue with TPS650245RHBT, 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 TPS650245RHBT part is unused and in its original packaging.
Return procedure for TPS650245RHBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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