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Texas Instruments TPS61289RZPR
- Part No.:
- TPS61289RZPR
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
TPS61289RZPR.pdf
- Description:
- IC REG BCK BST ADJ 20A DL 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,955
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Product details
Overview
TPS61289RZPR from Texas Instruments is a bidirectional synchronous buck/boost DC-DC converter integrating an 8.5mΩ high-side MOSFET and supporting external low-side FET control. It operates with VLOW from 0.5V to 23V and VHIGH from 4.5V to 25V, delivers up to 20A switching current, and features pin-selectable buck or boost mode for battery test systems and USB Type-C® PD applications.
For engineers reviewing the TPS61289RZPR datasheet, TPS61289RZPR pinout, TPS61289RZPR application, or TPS61289RZPR equivalent, key selection considerations include programmable 5–20A current limit, adaptive frequency scaling (50–250kHz), VHIGH overvoltage protection at 27V, thermal shutdown at 160°C, and 2.5mm × 3.0mm VQFN HotRod™ Lite packaging for high-power density designs.
Technical Context
The TPS61289RZPR implements adaptive constant-on-time valley current control in boost mode and adaptive constant-off-time peak current control in buck mode, both operating in forced PWM. Its MODE pin selects directionality, while ILIM sets current limit via external resistor-enabling precise CC/CV battery charge/discharge control.
Switching frequency dynamically scales with VLOW voltage: 250kHz above 1.7V, 100kHz between 0.5V–1.5V, and 50kHz below 0.5V, with 200mV hysteresis preventing jitter. Protection includes cycle-by-cycle OCP, VHIGH UVLO (3.1V) and OVP (27V), VCC UVLO (2.15V), and thermal shutdown with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VLOW Range | 0.5V to 23V - supports ultra-low-voltage battery discharge down to 0.5V at VHIGH = 15V |
| VHIGH Range | 4.5V to 25V - enables direct interface with 12V/15V/24V rails and USB PD 3.0 extended power range |
| Max Switching Current | 20A - set via ILIM resistor; supports high-current battery cycling and fast-charging applications |
| High-Side RDS(on) | 8.5mΩ - reduces conduction loss and thermal stress in high-current paths |
| Switching Frequency | 50–250kHz - auto-scales with VLOW to maintain regulation across wide input ratios |
| VHIGH OVP Threshold | 27V (typ) - protects downstream circuitry from overvoltage due to feedback divider error or transient events |
| Thermal Shutdown | 160°C (typ), 140°C recovery - ensures safe operation under sustained overload or poor heatsinking |
Pinout & Package
TPS61289RZPR uses a 2.5mm × 3.0mm VQFN-14 HotRod™ Lite package with exposed thermal pad (RZP suffix), optimized for low-inductance layout and high-current routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIM | Current limit programming input | Resistor-to-AGND sets 5–20A peak/valley current limit; determines maximum charge/discharge rate |
| FB | Bidirectional feedback input | Connects to center tap of resistor divider; sets regulated VFB = 0.7–0.8V for CC/CV loop control |
| COMP | Loop compensation node | External RC network stabilizes control loop; clamped between 0.6V and 1.6V for safe soft-start and fault recovery |
| MODE | Buck/boost direction select | Logic high = buck (VHIGH → VLOW); logic low = boost (VLOW → VHIGH); must not float |
| VHIGH | High-voltage power rail | Primary power source/sink; powers internal LDO (5.1V) and enables device when >3.1V |
| SW | Switching node | Connects drain of external low-side FET and source of internal high-side FET; carries full switching current |
| BOOT | High-side gate driver supply | Requires 0.1–1.0µF ceramic cap + 5.6V Zener to SW; enables efficient high-side FET drive |
| PGND | Power ground return | Source connection for external low-side FET; separates high-current return from analog ground |
| DRV | Low-side gate driver output | 1.5A source / 2A sink capability drives external N-channel MOSFET with minimal dead-time distortion |
| M/SYNC | Frequency sync input | Accepts external clock (±20% of 250kHz); forces fixed frequency for EMI reduction or multiphase interleaving |
| VCC | Internal LDO output | 5.1V @ 15mA; powers internal circuitry; requires >1µF X7R/X5R ceramic capacitor to AGND |
| VLOW | Low-voltage power rail | Interface to battery or supercap; minimum supported voltage depends on VLOW/VHIGH ratio and frequency |
| EN/UVLO | Enable + programmable UVLO | 1.23V threshold with hysteresis; supports resistor-divider-based input undervoltage lockout for VLOW or VHIGH |
| AGND | Analog reference ground | Separate ground for FB, COMP, ILIM, EN/UVLO; must be tied to PGND at single point near device |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional buck/boost topology | Enables reversible energy flow between VLOW and VHIGH rails without external H-bridge or dual converters |
| Programmable 5–20A current limit | Single ILIM resistor configures peak current in buck mode and valley current in boost mode for matched charge/discharge profiles |
| Adaptive frequency scaling | Reduces switching losses at low VLOW by dropping to 100kHz or 50kHz while maintaining regulation and stability |
| VQFN-14 HotRod™ Lite package | 2.5mm × 3.0mm footprint with copper-exposed pad minimizes parasitic inductance and improves thermal resistance (RθJB = 18.8°C/W) |
| Integrated 8.5mΩ high-side MOSFET | Eliminates need for external high-side switch; reduces BOM count and PCB area in high-current paths |
| Rich protection suite | Includes VHIGH OVP (27V), VHIGH UVLO (3.1V), VCC UVLO (2.15V), cycle-by-cycle OCP, and thermal shutdown with hysteresis |
Applications
| Battery Testing System (BTS) | Super-capacitor Backup Power |
|---|---|
Use Scenario: Automated cycling of Li-ion, LFP, or NiMH cells requiring precise ±15A charge/discharge under voltage and current control loops. IC Role / Device Role / Timing Role: Bidirectional power converter core that reverses direction based on MODE pin state and regulates VLOW/VHIGH using FB and COMP feedback. Use Value: Enables single-device implementation of full-featured battery cycler with <0.5V minimum VLOW support and 20A peak current capability. | Use Scenario: Seamless backup power switchover during AC mains failure, where supercapacitors supply 12–24V loads for seconds to minutes. IC Role / Device Role / Timing Role: Boosts low-voltage supercap stack (e.g., 2.7V × 4 = 10.8V) to system rail (15V/24V); buck mode recharges caps from main supply. Use Value: Eliminates separate charger and boost converter; supports rapid recharge cycles with programmable current limiting and thermal protection. |
| USB Type-C® Power Delivery | Industrial Energy Storage Interface |
Use Scenario: Programmable power supply for USB PD sink/source negotiation, delivering up to 100W (20V/5A) with dynamic voltage/current adjustment. IC Role / Device Role / Timing Role: Regulates VBUS from variable adapter input (5–20V) to stable output; MODE pin toggles between sourcing and sinking modes per PD contract. Use Value: Meets USB PD 3.0 extended power range requirements with adaptive frequency control and robust overvoltage protection at VHIGH. | Use Scenario: Bidirectional interface between 48V battery bank and 12V/24V auxiliary loads in telecom or renewable microgrids. IC Role / Device Role / Timing Role: High-efficiency DC-DC stage enabling energy transfer in either direction; synchronized via M/SYNC to reduce system-level EMI. Use Value: Delivers >90% efficiency across wide VLOW/VHIGH ratios (e.g., 12V ↔ 48V) with minimal external components and compact 2.5×3.0mm footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional buck/boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2965GQ-Z | Fixed 200kHz frequency; no VLOW-dependent frequency scaling; integrated low-side FET; 16A max current | Limited to narrower VLOW range (1.8–16V); lacks ultra-low-voltage (<1V) boost capability | Prefer MP2965GQ-Z for simpler fixed-frequency designs with lower current needs and no sub-1V operation |
| LTC3873EMS#TRPBF | External high- and low-side FETs required; 100kHz–1MHz adjustable frequency; 20A+ scalable with FET selection | Higher BOM count and layout complexity; better suited for custom high-reliability industrial converters | Choose LTC3873EMS#TRPBF when full FET flexibility, wider frequency range, or higher temperature rating (–40°C to 125°C) is required |
Compared with MP2965GQ-Z and LTC3873EMS#TRPBF, the TPS61289RZPR uniquely combines ultra-low VLOW support (0.5V), adaptive frequency scaling, integrated high-side FET, and compact HotRod™ packaging-making it optimal for space-constrained, high-current battery test and USB PD applications where sub-1V regulation and thermal efficiency are critical.
Availability
TPS61289RZPR is available at Aetrix Electronics and suitable for battery testing systems, supercapacitor backup power converters, and USB Type-C® power delivery applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS61289RZPR 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS61289RZPR belongs to TI's high-current bidirectional DC-DC converter product line, engineered specifically for battery cycling, energy storage interfaces, and programmable power supplies demanding reversible power flow, wide input voltage range, and thermal robustness.
FAQ
What is the minimum VLOW voltage supported by the TPS61289RZPR?
The TPS61289RZPR supports VLOW as low as 0.5V when VHIGH = 15V, enabled by its adaptive frequency scaling-dropping to 50kHz below 0.5V to maintain regulation. This ultra-low input capability is confirmed in the datasheet's electrical characteristics and typical efficiency curves (Figures 5-1 and 5-3), making the TPS61289RZPR suitable for deep-discharge battery testing and supercapacitor applications where voltage drops below 1V.
How does the TPS61289RZPR implement bidirectional operation?
The TPS61289RZPR achieves bidirectionality through pin-selectable MODE configuration and shared FB/COMP feedback architecture. When MODE = high, it operates as a buck converter (VHIGH → VLOW); when MODE = low, it operates as a boost converter (VLOW → VHIGH). The FB pin connects to a center-tapped resistor divider to maintain VFB = 0.7–0.8V in both directions, and the COMP pin accepts external compensation for CC/CV control-enabling seamless reversal of power flow without hardware changes.
What protection features does the TPS61289RZPR include?
The TPS61289RZPR integrates VHIGH overvoltage protection (27V), VHIGH undervoltage lockout (3.1V), VCC undervoltage lockout (2.15V), cycle-by-cycle overcurrent protection, and thermal shutdown (160°C with 20°C hysteresis). These protections are explicitly documented in Section 5.5 Electrical Characteristics and Section 6.3.8–6.3.9 of the datasheet, ensuring robust operation in battery test and industrial backup power applications where fault conditions are common.
Can the TPS61289RZPR synchronize to an external clock?
Yes, the TPS61289RZPR supports external clock synchronization via the M/SYNC pin. When a valid clock signal (50ns minimum pulse width, low <0.4V/high >1.2V, within ±20% of 250kHz) is applied, the device forces its switching frequency to match the external clock-enabling EMI reduction and multiphase interleaving. This capability is verified in Section 6.3.7 and Table 5-5 of the datasheet, and requires no additional configuration beyond driving the M/SYNC pin.
What is the thermal performance of the TPS61289RZPR in its VQFN-14 package?
The TPS61289RZPR in the 2.5mm × 3.0mm VQFN-14 HotRod™ Lite package achieves RθJB = 18.8°C/W (junction-to-board) and RθJA = 64.5°C/W (junction-to-ambient, standard JEDEC board). These values are measured per JEDEC JESD51 standards and published in Section 5.4 Thermal Information. The exposed thermal pad and low-inductance HotRod™ construction enable efficient heat transfer to the PCB, supporting continuous 20A operation with appropriate copper area and airflow.
TPS61289RZPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 0.5V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 0.5V, 4.5V
- Voltage - Output (Max):
- 23V, 25V
- Current - Output:
- 20A (Switch)
- Frequency - Switching:
- 50kHz, 100kHz, 250kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 14-VQFN-HR (2.5x3)
TPS61289RZPR FAQ
1.How can I place an order for TPS61289RZPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61289RZPR 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 TPS61289RZPR reliable?
The price and inventory of TPS61289RZPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61289RZPR is usually 5 days.
3.What payment methods are accepted for TPS61289RZPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61289RZPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61289RZPR?
TPS61289RZPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61289RZPR 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 TPS61289RZPR?
For technical support, including TPS61289RZPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61289RZPR requirements.
6.How does Aetrix verify that TPS61289RZPR is sourced from the original manufacturer or authorized distributors?
All TPS61289RZPR 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 TPS61289RZPR meets industry standards.
7.What is the process for return or replacement of TPS61289RZPR?
All TPS61289RZPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61289RZPR, 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 TPS61289RZPR part is unused and in its original packaging.
Return procedure for TPS61289RZPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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