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Texas Instruments TPS61090RSARG4
- Part No.:
- TPS61090RSARG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
TPS61090RSARG4.pdf
- Description:
- IC REG BOOST ADJ 2A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,994
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Product details
Overview
TPS61090RSARG4 from Texas Instruments is a synchronous boost DC-DC converter IC designed for single-cell Li-ion or dual-cell alkaline/NiMH battery-powered systems. It delivers up to 500 mA at 5 V from as low as 1.8 V input, features 96% peak efficiency, 600 kHz fixed-frequency PWM operation, and integrated low-battery detection with LBI/LBO pins.
For engineers reviewing the TPS61090RSARG4 datasheet, TPS61090RSARG4 pinout, TPS61090RSARG4 application, or TPS61090RSARG4 equivalent, key selection considerations include its 16-pin VQFN (4 × 4 mm) package, 500 mV FB reference voltage, 2.2 A switch current limit, power-save mode enable via SYNC pin, and load disconnect during shutdown.
Technical Context
The TPS61090RSARG4 implements a fixed-frequency, multiple feed-forward PWM controller with synchronous rectification using internal N- and P-channel MOSFETs. It monitors VBAT, VOUT, and NMOS switch voltage drop in real time to directly adjust duty cycle-bypassing slow error-amplifier loop latency for fast transient response.
Its control architecture includes soft-start with precharge phase, undervoltage lockout (1.6 V typical), overtemperature protection (140 °C), and an integrated antiringing switch that clamps SW node ringing to VBAT during discontinuous conduction mode-reducing EMI without external snubbers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 5.5 V - supports direct connection to single-cell Li-ion (2.5–4.2 V) or two-cell alkaline/NiMH (2.4–3.2 V typical). |
| Output Voltage | Adjustable 1.8 V to 5.5 V - set via external resistor divider on FB pin with 500 mV reference voltage. |
| Switch Current Limit | 2200 mA typical - limits peak inductor current to prevent saturation and thermal overload under heavy load or startup. |
| Quiescent Current | 20 µA typical - enables >100-hour standby in portable devices powered by 100 mAh batteries. |
| Oscillator Frequency | 600 kHz nominal - balances efficiency, size (enables compact 6.8 µH inductor), and EMI profile. |
| Efficiency Peak | 96% - achieved via synchronous rectification eliminating Schottky diode losses; critical for battery runtime extension. |
| Shutdown Current | 1 µA max - ensures near-zero battery drain when EN = GND; load is fully disconnected from VBAT. |
Pinout & Package
TPS61090RSARG4 is housed in a thermally enhanced 16-pin VQFN package (4.0 mm × 4.0 mm, 0.5 mm pitch) with exposed PowerPAD™ soldered to PGND for optimal thermal dissipation. The package complies with JEDEC MO-220 and RoHS requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 11) | Enable input | Active-high logic: connects to VBAT to enable regulation; ties to GND to enter full shutdown with load isolation. |
| FB (Pin 14) | Voltage feedback input | Monitors resistive divider output; regulates VOUT to maintain 500 mV at FB - sets output voltage per R3/R4 ratio. |
| GND (Pin 13) | Control ground | Reference for all logic and analog circuitry; must be separated from PGND except at single-point PCB connection. |
| LBI (Pin 9) | Low-battery comparator input | Accepts scaled battery voltage; triggers LBO when input drops below 500 mV (10 mV hysteresis). |
| LBO (Pin 12) | Low-battery open-drain output | Drives low when LBI < 500 mV; requires external pull-up (e.g., 1 MΩ to VOUT) for system-level battery alert. |
| PGND (Pins 5,6,7) | Power ground | Return path for high-current boost/rectifier switches; connects to PowerPAD™ for thermal and EMI performance. |
| SYNC (Pin 10) | Mode control input | Low = enable power-save mode; high = force fixed-frequency PWM; also accepts external clock (500–700 kHz). |
| SW (Pins 3,4) | Boost switch node | Connects to inductor and internal NMOS/PMOS switches; high dv/dt node requiring tight layout and antiringing design. |
| VBAT (Pin 8) | Input supply | Primary power source input; feeds internal regulator and switch drivers; monitored for UVLO (1.6 V threshold). |
| VOUT (Pins 1,15,16) | Regulated output | Delivers boosted DC voltage; three parallel pins reduce IR drop and improve current handling for 500 mA loads. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Replaces lossy Schottky diode with 55 mΩ PMOS switch - eliminates forward voltage drop and boosts efficiency to 96%. |
| Load disconnect during shutdown | Internal circuit isolates VOUT from VBAT when EN = GND - prevents battery drain and enables true zero-power state. |
| Integrated antiringing switch | Clamps SW node to VBAT during DCM - suppresses high-frequency ringing without external components, reducing radiated EMI. |
| Programmable low-battery detection | LBI/LBO interface allows user-defined battery cutoff (e.g., 2.8 V via resistor divider) - avoids deep discharge and extends cell life. |
| Soft-start with precharge | Initial rectifier-on phase charges output capacitor to ~VBAT before switching begins - limits inrush current and protects battery. |
Applications
| Portable Audio Devices | Handheld Medical Monitors |
|---|---|
|
Use Scenario: MP3 player powered by single-cell Li-ion battery requiring stable 5 V rail for DAC, display, and USB interface. IC Role / Device Role / Timing Role: Primary voltage booster converting 2.8–4.2 V battery range to regulated 5 V output with dynamic load handling up to 500 mA. Use Value: 96% efficiency extends playback time; power-save mode maintains >85% efficiency at 10 mA standby; LBO alerts firmware before battery exhaustion. |
Use Scenario: Battery-operated pulse oximeter with OLED display, sensor biasing, and Bluetooth LE radio needing clean 3.3 V from 2.4 V NiMH stack. IC Role / Device Role / Timing Role: Synchronous boost converter generating precise 3.3 V from variable input; FB pin configured for fixed 3.3 V output via internal divider. Use Value: 20 µA quiescent current enables multi-week shelf life; load disconnect prevents battery self-discharge during storage; low EMI ensures signal integrity for analog front-end. |
| USB-Powered Peripherals | Industrial Handheld Scanners |
|
Use Scenario: USB bus-powered barcode scanner requiring 5 V at 300 mA while operating from 4.75–5.25 V host supply. IC Role / Device Role / Timing Role: Input voltage step-up regulator compensating for USB cable drop; operates in fixed PWM mode (SYNC = VBAT) for predictable EMI profile. Use Value: 600 kHz switching enables small 6.8 µH inductor; 2.2 A switch limit handles motor startup surges; shutdown current <1 µA meets USB suspend requirements. |
Use Scenario: Ruggedized inventory scanner using dual AA alkaline cells (1.8–3.2 V) to power 5 V logic, laser driver, and CMOS imager. IC Role / Device Role / Timing Role: Wide-input boost converter delivering 5 V ±3% across full battery discharge curve; LBI programmed for 2.0 V cutoff to prevent cell reversal. Use Value: Undervoltage lockout (1.6 V) prevents malfunction at end-of-life; thermal shutdown (140 °C) protects during extended scanning; VQFN package withstands mechanical shock. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61091RSARG4 | Fixed 3.3 V output; identical pinout, package, and electrical specs except FB pin is internally connected. | No external resistor divider needed; unsuitable where adjustable output or 5 V is required. | Select when system requires only 3.3 V and board space is constrained - eliminates R3/R4 components. |
| TPS61291DRVR | Lower IQ (1.2 µA), 1.8–5.5 V input, 5 V fixed output, 1.2 A switch limit, 2-mm × 2-mm WSON package. | Higher integration (integrated inductor not present), smaller footprint, lower output current capability (300 mA). | Choose for ultra-low-power wearables where 300 mA suffices and PCB area is premium - not a drop-in replacement due to different pinout and current rating. |
Compared with TPS61090RSARG4, TPS61091RSARG4 offers identical performance with fixed 3.3 V output for simplified BOM, while TPS61291DRVR trades higher efficiency and smaller size for reduced output current and non-pin-compatible layout - both require schematic and layout revision.
Availability
TPS61090RSARG4 is available at Aetrix Electronics and suitable for portable audio devices, handheld medical monitors, USB-powered peripherals, industrial handheld scanners, and battery-backed IoT edge nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TPS61090RSARG4 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 with over 90 years of innovation in analog, embedded processing, and power management technologies, serving automotive, industrial, and consumer markets.
The TPS6109x product line was engineered specifically for high-efficiency, low-quiescent-current boost conversion in space-constrained, battery-critical portable electronics - emphasizing thermal robustness, EMI control, and seamless integration with Li-ion and multi-cell alkaline sources.
FAQ
What is the function of the SYNC pin on the TPS61090RSARG4?
The SYNC pin on the TPS61090RSARG4 controls operational mode: pulled low to enable power-save mode (PFM) for improved light-load efficiency, pulled high to force fixed-frequency PWM operation, or driven with an external 500–700 kHz clock signal to synchronize switching. This flexibility allows designers to optimize EMI, efficiency, or timing predictability based on system requirements - all without changing the TPS61090RSARG4 hardware configuration.
How does the TPS61090RSARG4 achieve 96% peak efficiency?
The TPS61090RSARG4 achieves 96% peak efficiency through synchronous rectification - replacing the lossy external Schottky diode with an integrated 55 mΩ PMOS switch - combined with low-RDS(ON) NMOS boost switch (55 mΩ), optimized gate drive, and minimized switching losses at 600 kHz. This architecture eliminates forward voltage drop losses inherent in diode-based boost converters, directly extending battery runtime in applications powered by the TPS61090RSARG4.
Can the TPS61090RSARG4 operate with a 1.8 V input and deliver 5 V at 500 mA?
Yes, the TPS61090RSARG4 is explicitly rated to deliver up to 500 mA at 5 V from a 1.8 V input, as confirmed in the datasheet's "Typical Applications" section and efficiency curves (Figure 4). Its 2.2 A switch current limit and feed-forward control architecture ensure stable regulation and sufficient headroom even at minimum input voltage - making the TPS61090RSARG4 suitable for deeply discharged single-cell Li-ion or dual-cell alkaline systems.
What is the purpose of separating GND and PGND pins on the TPS61090RSARG4?
The TPS61090RSARG4 separates GND (control/logic ground) and PGND (power ground) to prevent high-switching-current noise from coupling into sensitive analog circuits like the error amplifier and FB comparator. GND serves as the reference for all control logic and feedback sensing, while PGND carries pulsed inductor return current. They must connect at a single point near the GND pin - a layout practice critical to maintaining regulation accuracy and stability in the TPS61090RSARG4 design.
Does the TPS61090RSARG4 provide battery protection during shutdown?
Yes, the TPS61090RSARG4 provides active battery protection during shutdown: when EN is pulled low, internal circuitry disconnects the load from VBAT entirely - preventing reverse current flow through the body diode of the high-side PMOS. This results in shutdown current ≤1 µA and eliminates parasitic battery drain, a feature explicitly documented in the "Load Disconnect During Shutdown" section of the TPS61090RSARG4 datasheet.
TPS61090RSARG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
TPS61090RSARG4 FAQ
1.How can I place an order for TPS61090RSARG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61090RSARG4 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 TPS61090RSARG4 reliable?
The price and inventory of TPS61090RSARG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61090RSARG4 is usually 5 days.
3.What payment methods are accepted for TPS61090RSARG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61090RSARG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61090RSARG4?
TPS61090RSARG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61090RSARG4 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 TPS61090RSARG4?
For technical support, including TPS61090RSARG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61090RSARG4 requirements.
6.How does Aetrix verify that TPS61090RSARG4 is sourced from the original manufacturer or authorized distributors?
All TPS61090RSARG4 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 TPS61090RSARG4 meets industry standards.
7.What is the process for return or replacement of TPS61090RSARG4?
All TPS61090RSARG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61090RSARG4, 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 TPS61090RSARG4 part is unused and in its original packaging.
Return procedure for TPS61090RSARG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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