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Texas Instruments TPS65021RHAT
- Part No.:
- TPS65021RHAT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
TPS65021RHAT.pdf
- Description:
- IC BAT PWR MGMT LI-ION 1C 40VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,181
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Product details
Overview
TPS65021RHAT 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 (1.2 A, 1 A, 900 mA), two 200-mA LDOs, and a 30-mA RTC LDO with battery backup switching. It supports dynamic voltage scaling for processor cores and provides I²C interface, thermal shutdown, and low-ripple PFM mode operation in portable applications such as smartphones and PDAs.
For engineers reviewing the TPS65021RHAT datasheet, TPS65021RHAT pinout, TPS65021RHAT application, or TPS65021RHAT equivalent, this page delivers verified technical context, validated pin functions, confirmed operating conditions (–40°C to +85°C), package mapping (40-pin VQFN, 6 mm × 6 mm), and real-world design implications for system-level power sequencing and voltage rail management.
Technical Context
The TPS65021RHAT integrates three independent buck converters with internal P/N-channel MOSFETs, each featuring programmable output voltages via digital pins (DEFDCDC1–3) or I²C, soft-start ramp time of 750 µs, and selectable PFM/PWM modes. All converters share common input rails (VINDCDC1/2/3 tied to VCC) and enter low-power mode at light load to maintain high efficiency across wide current ranges.
Its dual 200-mA LDOs support input range 1.5 V–6.5 V and offer four preselectable output combinations via DEFLDO1/DEFLDO2 pins; the dedicated VRTC LDO supplies real-time clock circuitry with automatic switchover between VSYSIN and VBACKUP inputs, including hysteresis thresholds (2.55 V/2.65 V) and 30-mA output capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current (DCDC1) | 1.2 A max - powers system voltage rail (e.g., 3.3 V I/O domain) with minimal external components |
| Output Current (DCDC2) | 1 A max - supplies memory voltage (e.g., 1.8 V DDR) with adjustable output via resistor divider or I²C |
| Output Current (DCDC3) | 900 mA max - delivers processor core voltage (e.g., 1.3 V or 1.55 V) with dynamic voltage management support |
| LDO Output Current | 200 mA per LDO - enables general-purpose analog/peripheral rails with <150 mV dropout at full load |
| I²C Interface Speed | Up to 400 kHz - allows real-time register access for voltage scaling, interrupt masking, and LDO enable/disable control |
| Quiescent Current | 85 µA typical (all DC-DCs enabled, zero load, PFM mode) - critical for battery runtime in standby states |
| Operating Temperature | –40°C to +85°C - qualified for industrial and handheld consumer environments without derating |
| Package | 40-pin VQFN (RHA), 6.0 mm × 6.0 mm - surface-mount compatible with standard reflow profiles and thermal pad grounding |
Pinout & Package
TPS65021RHAT uses a 40-pin VQFN (RHA) package with exposed thermal pad connected to AGND. Pin numbering follows top-view layout; all analog grounds (AGND1, AGND2) are internally bonded. Power ground pins (PGND1–3) are isolated per converter to minimize noise coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DCDC1_EN (25) | Enable control for VDCDC1 converter | Logic-high active; enables 1.2-A buck regulator for system voltage rail - essential for power sequencing |
| VDCDC1 (9) | Feedback sense input | Direct connection to output node; sets regulated voltage via internal 0.6-V reference and external resistor divider |
| L1 (7) | Switch node for DCDC1 | Connects to inductor; carries high-frequency switching current - requires tight layout and low-inductance path to PGND1 |
| DEFDCDC1 (10) | Default voltage select for DCDC1 | Digital input selecting 3.0 V or 3.3 V fixed output; also accepts resistor divider for adjustable voltage down to 0.6 V |
| SCLK (30) / SDAT (29) | I²C serial interface | Standard-mode/fast-mode compatible (≤400 kHz); enables dynamic voltage scaling and interrupt configuration during operation |
| RESPWRON (27) | Open-drain system reset output | Asserted low after power-up delay set by capacitor on TRESPWRON (1 nF → 100 ms); synchronizes SoC boot sequence |
| VINLDO (19) | Input supply for LDO1/LDO2 | Accepts 1.5–6.5 V - can be fed from battery or any DC-DC output; decoupling with ≥1 µF required |
| VRTC (16) | RTC LDO output | 3-V output with 30-mA capability and automatic backup switchover - maintains RTC during main power loss |
Key Features
| Feature | Design Value |
|---|---|
| Triple synchronous buck architecture | Enables independent, high-efficiency (up to 97%) regulation of core, memory, and I/O rails from single Li-ion source |
| Dynamic voltage scaling (DVS) | Real-time adjustment of VDCDC3 output via I²C to match processor performance states - reduces active power dissipation |
| Battery backup switchover | Automatic transition between VSYSIN and VBACKUP inputs for VRTC with hysteresis (2.55 V/2.65 V) - prevents RTC brownout |
| Low-ripple PFM mode | Maintains stable output under light loads (<10 mA) without audible coil whine - critical for audio-sensitive portable devices |
| Integrated power-good monitoring | Monitors all DC-DC and LDO outputs with ±3% threshold accuracy and 10-µs propagation delay - ensures reliable SoC reset timing |
| Thermal shutdown protection | Triggers at 160°C junction temperature with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB cooling |
Applications
| Smartphone Power Management | PDA System Power Architecture |
|---|---|
|
Use Scenario: Single-cell Li-Po powered smartphone requiring independent voltage rails for application processor (core), memory (DDR), and peripherals (I/O). IC Role / Device Role / Timing Role: Central PMIC managing power sequencing, dynamic voltage scaling, and RTC backup during sleep/hibernation cycles. Use Value: Eliminates need for discrete regulators and reduces BOM count by integrating three bucks, two LDOs, and RTC switch in one 6-mm × 6-mm package. |
Use Scenario: Handheld PDA with OMAP1610/1710 processor demanding precise core voltage control and long battery life in standby. IC Role / Device Role / Timing Role: Primary power controller providing soft-started, sequenced DC-DC outputs and low-quiescent-current LDOs for analog subsystems. Use Value: 85-µA quiescent current in PFM mode extends standby time; I²C interface enables firmware-controlled voltage transitions during task switching. |
| Digital Still Camera Power System | Internet Audio Player Platform |
|
Use Scenario: Compact digital camera needing fast wake-up from deep sleep while maintaining accurate sensor bias and flash charging. IC Role / Device Role / Timing Role: Dual-role power manager supplying regulated rails and generating synchronized reset pulses (RESPWRON) for image processor boot. Use Value: Configurable reset delay (via TRESPWRON capacitor) aligns power-on timing with sensor initialization; low-noise PFM mode avoids interference with image signal chain. |
Use Scenario: Portable audio player with Intel PXA270 SoC requiring split-supply domains and battery-backed real-time clock. IC Role / Device Role / Timing Role: Integrated power solution delivering core (1.3 V), memory (1.8 V), and I/O (3.3 V) rails plus VRTC switchover for uninterrupted timekeeping. Use Value: Predefined DEFDCDCx pins simplify hardware configuration; VBACKUP input supports coin-cell backup without external diode or switch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power management IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RHAT | Same pinout and package; adds fourth 200-mA LDO and removes VRTC switch functionality | Preferred when additional LDO rail is needed but RTC backup is handled externally | Select TPS65023RHAT only if fourth LDO is required and VRTC switchover is unnecessary |
| TPS650243RHAT | Includes integrated USB charger detection and battery fuel gauge interface; different I²C register map | Suitable for newer designs requiring battery charge management alongside power regulation | Choose TPS650243RHAT when USB charging and state-of-charge monitoring are mandatory system functions |
Compared with TPS65021RHAT, TPS65023RHAT trades RTC backup capability for an extra LDO, while TPS650243RHAT adds USB charging logic but increases software integration complexity - neither offers drop-in replacement without hardware or firmware revision.
Availability
TPS65021RHAT is available at Aetrix Electronics and suitable for smartphone, PDA, digital still camera, and internet audio player designs requiring stable component supply, long-term lifecycle support, and guaranteed traceability for production programs.
Supply support for TPS65021RHAT 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 and embedded processing technologies, with decades of expertise in power management innovation for portable and industrial applications.
The TPS6502x product line was designed specifically for single-cell Li-ion/Li-polymer powered handheld systems, integrating multiple DC-DC converters and LDOs to replace discrete power solutions in space-constrained, battery-sensitive designs.
FAQ
What is the maximum output current supported by each DC-DC converter in the TPS65021RHAT?
The TPS65021RHAT supports 1.2 A on DCDC1 (system voltage), 1 A on DCDC2 (memory voltage), and 900 mA on DCDC3 (processor core). These values are specified under recommended operating conditions (VINDCDCx = 2.5 V–6 V, TA = –40°C to +85°C) with appropriate external components (e.g., 2.2 µH inductors, 22 µF output capacitors). Exceeding these currents risks thermal shutdown or reduced efficiency.
How does the TPS65021RHAT handle power failure detection and system reset generation?
The TPS65021RHAT uses PWRFAIL_SNS and LOWBAT_SNS inputs to monitor supply voltage thresholds (2.55 V/2.65 V hysteresis), asserting open-drain PWRFAIL and LOW_BAT outputs. RESPWRON is driven low after a user-configurable delay set by capacitor on TRESPWRON (e.g., 1 nF → 100 ms), ensuring clean SoC reset synchronization - all functions are fully operational within the TPS65021RHAT without external logic.
Can the TPS65021RHAT's LDO outputs be configured to different voltages, and how is this done?
Yes - VLDO1 and VLDO2 default voltages are selected via DEFLDO1 and DEFLDO2 pins (four combinations: 1.8/2.5 V, 1.8/3.3 V, 2.5/2.5 V, 2.5/3.3 V). The I²C interface allows dynamic reconfiguration of both LDO outputs across 1 V–3.3 V range, enabling runtime adaptation to peripheral requirements - no hardware change needed once the TPS65021RHAT is deployed.
What thermal management features are built into the TPS65021RHAT?
The TPS65021RHAT includes junction-temperature sensing with thermal shutdown activation at 160°C and 20°C hysteresis, plus a low thermal resistance path (RθJB = 6.6°C/W) to the PCB via its exposed PowerPAD™. Designers must connect the thermal pad to a solid AGND plane with ≥4 thermal vias to achieve rated performance - failure to do so may trigger premature shutdown under 500-mW load conditions.
Is the TPS65021RHAT compatible with Intel PXA270 and OMAP processors, and what makes it suitable?
Yes - the TPS65021RHAT is explicitly referenced in TI documentation for Intel PXA270 and OMAP1610/1710/330 platforms. Its DCDC3 supports 1.3 V/1.55 V core outputs with dynamic voltage scaling, DCDC2 delivers 1.8 V memory rail, and VRTC meets Intel's 2.55 V/2.65 V switchover thresholds - all aligned to those processors' power architecture requirements without external components.
TPS65021RHAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 40-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:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VQFN (6x6)
TPS65021RHAT FAQ
1.How can I place an order for TPS65021RHAT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65021RHAT 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 TPS65021RHAT reliable?
The price and inventory of TPS65021RHAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65021RHAT is usually 5 days.
3.What payment methods are accepted for TPS65021RHAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65021RHAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65021RHAT?
TPS65021RHAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65021RHAT 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 TPS65021RHAT?
For technical support, including TPS65021RHAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65021RHAT requirements.
6.How does Aetrix verify that TPS65021RHAT is sourced from the original manufacturer or authorized distributors?
All TPS65021RHAT 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 TPS65021RHAT meets industry standards.
7.What is the process for return or replacement of TPS65021RHAT?
All TPS65021RHAT units undergo pre-shipment inspection (PSI). If there is an issue with TPS65021RHAT, 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 TPS65021RHAT part is unused and in its original packaging.
Return procedure for TPS65021RHAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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