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Texas Instruments TPS650242RHBT
- Part No.:
- TPS650242RHBT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS650242RHBT.pdf
- Description:
- IC BAT PWR MGMT LI-ION 1C 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,023
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Product details
Overview
TPS650242RHBT 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 / 0.8 A / 0.8 A), two 200 mA general-purpose LDOs, and one 30 mA always-on LDO (Vdd_alive). It supports dynamic voltage scaling on DCDC3 (1.0 V / 1.5 V), operates at 2.25 MHz switching frequency, and features PFM/PWM mode selection via MODE pin for high efficiency across load ranges - deployed in ARM-based portable devices requiring compact, multi-rail power solutions.
For engineers reviewing the TPS650242RHBT datasheet, TPS650242RHBT pinout, TPS650242RHBT application, or TPS650242RHBT equivalent, key selection considerations include confirmed DCDC3 dual-voltage configuration (DEFDCDC3-controlled), verified 32-pin VQFN (5 mm × 5 mm) package with thermal pad, validated quiescent current of 40–170 µA depending on mode, and documented compatibility with external resistor-divider feedback for LDO1/LDO2 output adjustment.
Technical Context
The TPS650242RHBT integrates three independent buck regulators with separate enable pins (EN_DCDC1/2/3), fixed-frequency PWM or adaptive PFM operation selected by the MODE pin, and internal MOSFETs with RDS(ON) values of 125–698 mΩ. Each converter uses dedicated power grounds (PGND1/2/3) and switch nodes (L1/L2/L3), supporting input voltages from 2.5 V to 6 V and enabling precise rail sequencing via external control logic.
Its analog subsystem includes two externally adjustable 200 mA LDOs (VLDO1/VLDO2) with 1 V feedback reference, a dedicated 30 mA Vdd_alive LDO, and a PWRFAIL comparator with hysteresis (40–60 mV) referenced to PWRFAIL_SNS. All LDOs accept 1.5–6.5 V input and support ±1% output accuracy under full load, while thermal shutdown activates at 160 °C with 20 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DCDC1 Output Current | 1000 mA max - powers system I/O or peripheral rails at 2.8 V or 3.3 V |
| DCDC2 Output Current | 800 mA max - supplies memory voltage (1.8 V or 2.5 V) |
| DCDC3 Output Voltage | 1.0 V or 1.5 V selectable via DEFDCDC3 pin - targets processor core supply with dynamic scaling |
| LDO1/LDO2 Output Current | 200 mA each - supports configurable auxiliary rails using external resistor dividers |
| Vdd_alive Output | 1.2 V / 30 mA - maintains real-time clock or wake-up circuitry during deep sleep |
| Switching Frequency | 2.25 MHz nominal - enables use of small 2.2 µH inductors and 10–22 µF ceramic output capacitors |
| Quiescent Current | 40–170 µA - scales with active converters and mode (PFM vs PWM), critical for battery runtime |
Pinout & Package
The TPS650242RHBT is housed in a thermally enhanced 32-pin VQFN package (5.00 mm × 5.00 mm) with an exposed PowerPad connected to AGND for optimal thermal performance. Pin functions are fully defined per TI SLVS774C datasheet Rev. C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDCDC3 | Feedback sense input | Connects directly to DCDC3 output for closed-loop regulation; sets target voltage based on DEFDCDC3 state |
| DEFDCDC3 | Digital select input | Logic LOW = 1.0 V DCDC3 output; HIGH = 1.5 V - enables core voltage scaling without firmware change |
| EN_DCDC3 | Enable control | Active-high signal to start/stop DCDC3; allows independent power gating of processor core rail |
| L3 | Power switch node | Connects to 2.2 µH inductor; carries high-frequency switched current for DCDC3 |
| PGND3 | Power ground return | Low-impedance path for DCDC3 inductor current; must be routed separately from AGND to minimize noise coupling |
| VINLDO | LDO input supply | Common input for VLDO1 and VLDO2; accepts 1.5–6.5 V - can be sourced from battery or a DCDC output |
| FB_LDO1 | Feedback reference | 1 V precision reference point; external resistor divider between VLDO1 and GND sets output voltage |
| PWRFAIL_SNS | Comparator input | Monitors battery voltage; asserts open-drain PWRFAIL when falling below 1 V ±2% |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent buck converters | Enables simultaneous, sequenced generation of core (DCDC3), memory (DCDC2), and I/O (DCDC1) rails with no cross-regulation |
| DEFDCDC3 voltage select | Hardware-selectable 1.0 V / 1.5 V core output eliminates need for dynamic voltage scaling firmware or external DAC |
| 200 mA adjustable LDOs | Each LDO supports 1–3.3 V output via external resistive divider, allowing flexible auxiliary rail assignment |
| 2.25 MHz switching frequency | Permits use of miniature 2.2 µH shielded inductors and low-ESR ceramic capacitors, reducing board area by >30% vs lower-frequency PMICs |
| 85 µA typical quiescent current (PFM) | Extends battery life in standby mode - measured with all DCDCs enabled but zero load and LDOs off |
Applications
| ARM-Based Smartphones | GPS Navigation Devices |
|---|---|
Use Scenario: Compact handheld unit powered by single Li-ion cell requiring isolated, low-noise power for application processor, GPS baseband, RF front-end, and display interface. IC Role / Device Role / Timing Role: Central PMIC providing sequenced 1.0 V core, 1.8 V memory, 3.3 V I/O, plus 200 mA LDOs for sensor bias and audio codec supply. Use Value: DEFDCDC3 hardware voltage select enables fast core frequency transitions; 2.25 MHz operation minimizes EMI near sensitive RF sections. | Use Scenario: Portable automotive GPS receiver with always-on location tracking, requiring ultra-low quiescent current during sleep and rapid wake-up capability. IC Role / Device Role / Timing Role: Supplies 1.2 V Vdd_alive rail continuously, manages main SoC rails only on demand, and triggers PWRFAIL alert before brownout. Use Value: 40 µA PFM quiescent current (DCDC1 only enabled) extends battery hold-up time; PWRFAIL_SNS comparator ensures clean system shutdown. |
| Digital Cameras | PDA Systems |
Use Scenario: High-resolution imaging device needing burst-mode power delivery for image sensor, ISP, and flash LED drivers without voltage droop. IC Role / Device Role / Timing Role: Delivers 800 mA at 1.8 V to memory interface during capture, 1000 mA at 3.3 V to lens actuator, and 30 mA Vdd_alive to real-time clock. Use Value: Independent EN_DCDC2/EN_DCDC1 enables precise timing of memory and actuator power-up; soft-start (750 µs) prevents inrush-induced system reset. | Use Scenario: Legacy PDA with ARM9 processor, NAND flash, touchscreen controller, and SD card interface - all powered from one 3.7 V Li-ion cell. IC Role / Device Role / Timing Role: Generates 1.0 V core, 2.5 V memory, 3.3 V I/O, and two 200 mA LDOs for backlight and USB PHY supply. Use Value: External resistor-divider feedback on FB_LDO1/FB_LDO2 allows field-programmable voltage tuning without PCB redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power management IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS650241RHBT | DCDC3 outputs 0.9 V / 1.375 V; higher DCDC1/DCDC2 current (1.6 A / 1.0 A) | Better suited for high-performance ARM Cortex-A8/A9 processors requiring sub-1 V core rails | Select when lower core voltage and higher memory rail current are required; verify DEFDCDC3 logic mapping matches |
| TPS650243RHBT | DCDC3 outputs 1.0 V / 1.2 V; same 1.6 A / 1.0 A / 0.8 A current ratings as TPS650241 | Optimized for balanced core/memory performance in mid-tier smartphones and tablets | Choose for tighter core voltage tolerance (±1% at 1.2 V) and compatibility with 1.2 V DDR2 memory interfaces |
Compared with TPS650241RHBT and TPS650243RHBT, the TPS650242RHBT provides a unique 1.0 V / 1.5 V DCDC3 option ideal for processors supporting dual-voltage core operation, while maintaining identical 1.0 A / 0.8 A / 0.8 A current capability and pinout - making it optimal for cost-sensitive, moderate-performance embedded designs where 1.5 V core headroom improves margin.
Availability
TPS650242RHBT is available at Aetrix Electronics and suitable for ARM-based smartphones, GPS navigation devices, digital cameras, and PDA systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS650242RHBT 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 expertise in battery-powered system solutions.
The TPS65024x product line was designed specifically for space-constrained, single-cell Li-ion portable electronics - integrating multiple DC-DC converters and LDOs into a single 5 mm × 5 mm VQFN to eliminate discrete power components and simplify layout.
FAQ
What output voltages does the TPS650242RHBT support for its DCDC3 converter?
TPS650242RHBT supports two fixed DCDC3 output voltages: 1.0 V when DEFDCDC3 is logic LOW, and 1.5 V when DEFDCDC3 is logic HIGH. This hardware-selectable dual-voltage capability is specific to the TPS650242RHBT variant and enables dynamic core voltage scaling without software intervention. The TPS650242RHBT datasheet confirms these values in Table 6 (Voltage Options) and Section 9.3 (Feature Description).
How does the MODE pin affect efficiency in the TPS650242RHBT?
The MODE pin on the TPS650242RHBT selects between automatic PFM/PWM mode (MODE = LOW) for maximum light-load efficiency, and forced PWM mode (MODE = HIGH) for constant-frequency operation and improved transient response. In PFM mode, TPS650242RHBT achieves 85–90% efficiency at 1 mA load; in PWM mode, efficiency remains stable above 10 mA but quiescent current increases to 1.5–2.5 mA. This behavior is documented in Section 9.4 (Device Functional Modes) of the TPS650242RHBT datasheet.
Can the LDO1 and LDO2 outputs of the TPS650242RHBT be adjusted, and if so, how?
Yes, the TPS650242RHBT LDO1 and LDO2 outputs are externally adjustable using resistor dividers connected to FB_LDO1 and FB_LDO2 pins. Each LDO uses an internal 1 V reference, so output voltage is calculated as VOUT = 1 V × (1 + R1/R2). The TPS650242RHBT supports 1–3.3 V range with ±1% accuracy at 200 mA load, and requires ≥2.2 µF output capacitance. This adjustability is specified in Section 8.9 (Electrical Characteristics: General) and Figure 17 (Start-up LDO1 and LDO2).
What is the purpose of the PWRFAIL and PWRFAIL_SNS pins on the TPS650242RHBT?
The PWRFAIL_SNS pin on the TPS650242RHBT is an input to an internal comparator that monitors battery voltage; when it falls below 1 V ±2%, the open-drain PWRFAIL pin pulls low to signal impending power loss. Hysteresis is 40–60 mV, and propagation delay is ≤10 µs with 25 mV overdrive. This feature allows host processors to initiate safe shutdown or data save routines before brownout - a function confirmed in Section 8.9 (Electrical Characteristics: General) and functional block diagram of the TPS650242RHBT.
Does the TPS650242RHBT require external components for basic operation, and which ones are mandatory?
Yes, the TPS650242RHBT requires mandatory external components: three 2.2 µH power inductors (L1/L2/L3), six ceramic capacitors (10–22 µF output, 10 µF input per DCDC), one 1 µF VCC capacitor, two 2.2 µF LDO output capacitors, and one 2.2 µF Vdd_alive capacitor. Resistor dividers are optional for LDO voltage setting. These requirements are specified in Section 8.3 (Recommended Operating Conditions) and Figure 16 (Start-up VDCDC1 to VDCDC3) of the TPS650242RHBT datasheet.
TPS650242RHBT 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)
TPS650242RHBT FAQ
1.How can I place an order for TPS650242RHBT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS650242RHBT 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 TPS650242RHBT reliable?
The price and inventory of TPS650242RHBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS650242RHBT is usually 5 days.
3.What payment methods are accepted for TPS650242RHBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS650242RHBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS650242RHBT?
TPS650242RHBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS650242RHBT 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 TPS650242RHBT?
For technical support, including TPS650242RHBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS650242RHBT requirements.
6.How does Aetrix verify that TPS650242RHBT is sourced from the original manufacturer or authorized distributors?
All TPS650242RHBT 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 TPS650242RHBT meets industry standards.
7.What is the process for return or replacement of TPS650242RHBT?
All TPS650242RHBT units undergo pre-shipment inspection (PSI). If there is an issue with TPS650242RHBT, 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 TPS650242RHBT part is unused and in its original packaging.
Return procedure for TPS650242RHBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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