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Texas Instruments TPS61236RWLT
- Part No.:
- TPS61236RWLT
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
TPS61236RWLT.pdf
- Description:
- IC REG BOOST ADJ 6.5A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,935
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Product details
Overview
TPS61236RWLT from Texas Instruments is a synchronous boost converter IC optimized for single-cell Li-Ion/Li-Polymer battery-powered portable devices, delivering up to 3.5-A output current at 5-V from 3.3-V input with up to 97% efficiency, featuring programmable constant output current, 1-MHz switching frequency, and true input-output disconnection in shutdown.
For engineers reviewing the TPS61236RWLT datasheet, TPS61236RWLT pinout, TPS61236RWLT application, or TPS61236RWLT equivalent, key selection considerations include its adjustable 2.9–5.5-V output voltage, 14-mΩ/14-mΩ internal power switches, CC-pin-based current programming, INACT load-status indication, and VQFN-9 (2.5 mm × 2.5 mm) package suitability for space-constrained power banks and USB-C PD sink designs.
Technical Context
The TPS61236RWLT implements valley-current-mode control with dual regulation loops-voltage (CV) and current (CC)-enabling seamless transition between constant-voltage and constant-current operation. Its quasi-constant on-time PWM architecture supports 750–1250 kHz switching, while PFM mode reduces quiescent current to 10 µA under light load.
It integrates 14-mΩ high-side and low-side MOSFETs, features soft-start with pre-charge current limiting (0.05–1.7 A), and includes built-in protections: overvoltage (5.6–5.93 V), thermal shutdown (140°C), cycle-by-cycle current limit (6.5–9.5 A), and UVLO (2.2–2.3 V with 125-mV hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | Adjustable 2.9 V to 5.5 V - enables flexible USB-C sink, power bank, and multi-rail portable system designs. |
| Max Output Current | 3.5 A at 3.3-V → 5-V conversion - supports high-power USB charging without external current-limiting FETs. |
| Switching Frequency | 750–1250 kHz - allows use of compact 0.7–1.3 µH inductors and minimizes EMI filtering requirements. |
| Internal RDS(on) | 14 mΩ high-side / 14 mΩ low-side - contributes to ≥97% peak efficiency and reduces thermal stress in 2.5-mm² VQFN package. |
| Quiescent Current | 10 µA (light load) / <1 µA (shutdown) - extends battery life in always-on applications like smart power banks. |
| Constant Current Accuracy | ±15% (RCC = 124 kΩ, TJ = 25°C) - enables reliable programmable current limiting for USB compliance and thermal management. |
| Feedback Reference | 1.244 V (typ.) at FB pin - sets output voltage via external resistor divider; fixed 5.1-V version is TPS61235P. |
Pinout & Package
TPS61236RWLT is housed in a thermally enhanced 9-pin VQFN package (RWLT designation), measuring 2.5 mm × 2.5 mm with 0.5-mm pitch and exposed thermal pad (PGND-connected) for efficient heat dissipation in high-current portable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1) | Power Ground | Main return path for high-current switch node; must be connected to thermal pad for optimal thermal performance. |
| SW (2) | Switch Node | Drain connection of internal power MOSFETs; interfaces directly with external inductor and bootstrap capacitor. |
| VIN (3) | Input Supply | Accepts 2.3 V to (VOUT − 0.6 V); supports single-cell Li-ion (2.7–4.5 V) with UVLO at 2.2–2.3 V. |
| CC (4) | Constant Current Programming | Accepts resistor-to-ground to set output current limit; requires parallel capacitor (1–10 nF) for loop stability and current monitoring. |
| AGND (5) | Analog Ground | Reference ground for feedback and control circuits; should be separated from PGND and joined at single point near IC. |
| FB (6) | Voltage Feedback | Inputs voltage divider output to regulate adjustable VOUT; shorted to VOUT only in fixed-output TPS61235P variant. |
| EN (7) | Enable Input | Active-high logic control (1.0 V threshold); must be terminated-floating not allowed; enables true input-output disconnect in shutdown. |
| INACT (8) | Load Status Indicator | Open-drain output active-low when load current < 50 mA; used for system-level power state awareness and sleep/wake coordination. |
| VOUT (9) | Regulated Output | Delivers constant-voltage or constant-current output; connects to output capacitor and downstream USB port or load. |
Key Features
| Feature | Design Value |
|---|---|
| Dual CV/CC Regulation Loops | Enables seamless transition between voltage-regulated and current-limited operation-critical for USB-C power delivery negotiation and battery charging stages. |
| Programmable Constant Output Current | Set via external resistor at CC pin (e.g., 61.9 kΩ → ~2 A); eliminates need for discrete current-sense amplifiers and external load switches. |
| True Input-Output Disconnection | Shuts down both internal MOSFETs and blocks reverse current flow during shutdown (<1 µA ISD), preventing battery drain in standby. |
| Integrated Soft-Start with Pre-Charge | Limits inrush during startup using controlled pre-charge phase (ILIMpre = 0.05–1.7 A), avoiding output collapse under heavy capacitive loads. |
| Load Status Indication (INACT) | Provides real-time open-drain signal indicating low-load condition (<50 mA), enabling host MCU to enter low-power states without polling. |
Applications
| USB-C Power Delivery Sink | Smart Power Bank |
|---|---|
Use Scenario: Regulating 5-V bus from single-cell Li-ion battery to supply USB-C ports compliant with USB PD 3.0 sink requirements. IC Role / Device Role / Timing Role: Primary synchronous boost controller providing programmable current-limited 5-V output with load-status reporting for dynamic power allocation. Use Value: Eliminates external current-limiting FET and sense resistor; enables precise 3-A/5-V USB-C compliance with minimal BOM and PCB area. | Use Scenario: High-efficiency 5-V output stage in multi-port power banks supporting simultaneous fast-charging of smartphones and tablets. IC Role / Device Role / Timing Role: Core boost regulator managing battery-to-USB conversion with constant-current capability for adaptive charging profiles. Use Value: Delivers 3.5-A continuous output at >95% efficiency across 3.3–4.2-V battery range, reducing thermal design burden and extending usable capacity. |
| USB Charging Hub | Portable Tablet DC-DC Stage |
Use Scenario: Powering 4-port USB-A hub from integrated Li-polymer battery, requiring stable 5-V rail with individual port current limiting. IC Role / Device Role / Timing Role: Central boost converter supplying shared 5-V bus, with CC pin enabling firmware-controlled per-port current caps via resistor switching. Use Value: Replaces multiple discrete regulators; simplifies thermal layout and enables intelligent load balancing without additional current-sense ICs. | Use Scenario: Main 5-V system rail generation in ultra-thin tablets where battery voltage varies from 3.0 V to 4.4 V during discharge. IC Role / Device Role / Timing Role: High-density synchronous boost IC delivering regulated 5-V output with low quiescent current (10 µA) for always-on subsystems. Use Value: Maintains >90% efficiency down to 2.7-V input and supports rapid wake-from-sleep via fast start-up and INACT-driven interrupt signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61235RWLT | Fixed 5.1-V output; no FB pin usage; identical package, pinout, and current capability. | Suitable only for fixed 5-V applications; lacks output adjustability and external feedback network flexibility. | Select when 5.1-V output suffices and board layout re-use of TPS61236RWLT footprint is required. |
| MP28164GQ-Z | Adjustable 2.7–5.5-V output; 3-A max output; 1.2-MHz switching; different pinout and no INACT or CC monitoring. | Supports similar portable applications but lacks load-status reporting and programmable constant-current loop. | Choose when lower cost and simpler current-limiting (fixed OCP) are acceptable trade-offs for missing CC/INACT features. |
Compared with TPS61235RWLT, the TPS61236RWLT offers design flexibility through adjustable output voltage and full CC-loop control; versus MP28164GQ-Z, it provides superior system integration via INACT signaling and precision programmable current limiting-critical for USB-C compliance and thermal-aware power management.
Availability
TPS61236RWLT is available at Aetrix Electronics and suitable for power banks, USB-C charging hubs, and portable tablet PCs requiring stable component supply, high-efficiency boost conversion, and programmable current limiting in miniaturized form factors.
Supply support for TPS61236RWLT 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 high-efficiency DC-DC conversion for portable and battery-powered systems.
The TPS6123x product line was designed specifically for high-current, high-efficiency boost applications in single-cell Li-ion powered devices-including power banks, USB-C accessories, and portable computing-emphasizing integration, thermal performance, and USB-compliant current control.
FAQ
What is the output voltage range supported by the TPS61236RWLT?
The TPS61236RWLT supports an adjustable output voltage range of 2.9 V to 5.5 V, set via an external resistor divider connected to the FB pin. This differs from the fixed 5.1-V output of the TPS61235RWLT variant. The feedback reference voltage is 1.244 V (typ.), and the device maintains regulation across input voltages from 2.3 V up to (VOUT − 0.6 V), ensuring stable operation throughout the Li-ion battery discharge curve.
How does the TPS61236RWLT implement constant output current control?
The TPS61236RWLT implements constant output current control via its CC pin: an external resistor (RCC) to AGND sets the target current (e.g., 61.9 kΩ ≈ 2 A), while a parallel capacitor (1–10 nF) stabilizes the control loop. Internally, the device monitors inductor current during off-time and regulates the valley current to maintain VCC = 1.244 V. When load demand exceeds the programmed limit, the CC loop dominates and holds output current constant-even if output voltage sags-enabling USB-compliant current limiting without external components.
What protection features are integrated into the TPS61236RWLT?
The TPS61236RWLT integrates multiple hardware protections: input UVLO (2.2–2.3 V with 125-mV hysteresis), output overvoltage protection (5.6–5.93 V), thermal shutdown (140°C with 15°C hysteresis), cycle-by-cycle valley current limiting (6.5–9.5 A), and true input-output disconnection in shutdown (<1 µA ISD). It also features soft-start with pre-charge current limiting and reverse-current blocking-ensuring robust operation in portable systems subject to battery voltage sag, hot-plug events, and thermal stress.
Can the TPS61236RWLT be used in always-on applications?
Yes, the TPS61236RWLT is explicitly suited for always-on applications due to its 10-µA quiescent current under light load and INACT pin that signals low-load status (<50 mA) to the host system. This enables host MCUs to enter deep-sleep modes while the TPS61236RWLT remains active-monitoring bus readiness and waking the system only when needed. Its true shutdown disconnect (<1 µA) further prevents battery drain during extended idle periods, making it ideal for smart power banks and USB-C accessories requiring instant-on capability.
What is the recommended inductor value for the TPS61236RWLT?
The TPS61236RWLT recommends an effective inductance of 0.7 µH to 1.3 µH, with 1.0 µH being the nominal value. TI's reference designs use shielded 1.0-µH, 5-A inductors (e.g., LQM2HPN1R0MGHL) to balance size, saturation margin, and AC losses. Inductor DCR should be minimized to preserve efficiency, and saturation current rating must exceed the peak inductor current (≈ IOUT / (1 − D)), especially under worst-case 2.3-V input conditions. Layout must maintain tight coupling between VIN, SW, and PGND paths to minimize EMI and switching noise.
TPS61236RWLT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 4.9V
- Voltage - Output (Min/Fixed):
- 2.9V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6.5A (Switch)
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-VQFN-HR (2.5x2.5)
TPS61236RWLT FAQ
1.How can I place an order for TPS61236RWLT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61236RWLT 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 TPS61236RWLT reliable?
The price and inventory of TPS61236RWLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61236RWLT is usually 5 days.
3.What payment methods are accepted for TPS61236RWLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61236RWLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61236RWLT?
TPS61236RWLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61236RWLT 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 TPS61236RWLT?
For technical support, including TPS61236RWLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61236RWLT requirements.
6.How does Aetrix verify that TPS61236RWLT is sourced from the original manufacturer or authorized distributors?
All TPS61236RWLT 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 TPS61236RWLT meets industry standards.
7.What is the process for return or replacement of TPS61236RWLT?
All TPS61236RWLT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61236RWLT, 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 TPS61236RWLT part is unused and in its original packaging.
Return procedure for TPS61236RWLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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