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Texas Instruments TPS40222DRPRG4
- Part No.:
- TPS40222DRPRG4
- Manufacturer:
- Texas Instruments
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
TPS40222DRPRG4.pdf
- Description:
- IC REG BUCK ADJ 1.6A 6VSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,871
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Product details
Overview
TPS40222DRPRG4 from Texas Instruments is a non-synchronous buck converter IC with internal 250 mΩ N-channel MOSFET, fixed 1.25-MHz switching frequency, 0.8-V ±1% reference, 4.5–8-V input range, and 0–1.6-A output capability. It delivers point-of-load power for ASICs and disk drives using a compact 3 mm × 3 mm SON-6 package.
For engineers reviewing the TPS40222DRPRG4 datasheet, TPS40222DRPRG4 pinout, TPS40222DRPRG4 application, or TPS40222DRPRG4 equivalent, key selection criteria include its current-mode control architecture, integrated soft-start (550 µs typical), thermal shutdown (150°C), undervoltage lockout (3.8 V turn-on), and internal loop compensation eliminating external compensation components.
Technical Context
The TPS40222DRPRG4 employs pulse-by-pulse current-mode control with internal slope compensation derived from the oscillator ramp. Its transconductance error amplifier (10 µS) compares FB voltage against a trimmed 0.8-V reference and drives a PWM comparator with a composite sawtooth waveform generated from sensed high-side MOSFET current.
Startup uses an internal soft-start circuit that ramps the error amplifier's non-inverting input to 0.8 V over ~550 µs. During overcurrent events, frequency foldback reduces switching frequency from 1.25 MHz down to ~75 kHz while limiting on-time to 90–200 ns, and thermal shutdown activates at 150°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 8.0 V - supports standard 5-V distributed power rails with 0.4-V UVLO hysteresis. |
| Output Current | 0 A to 1.6 A - continuous load capability without external current-sense resistor. |
| Switching Frequency | 1.25 MHz (typ) - enables use of small 2.2–3.3 µH inductors and low-ESR ceramic output capacitors. |
| Feedback Reference | 0.8 V ±1% - sets output voltage via external resistor divider; stable across –40°C to 125°C. |
| Internal MOSFET RDS(on) | 250 mΩ (25°C) - limits conduction loss at 1.6-A load; rises to 550 mΩ at 125°C. |
| Soft-Start Time | 550 µs (typ) - prevents inrush current; controlled by internal capacitor, no external component required. |
| Overcurrent Threshold | 2.6 A (typ) - triggers frequency foldback and pulse-width limiting during short-circuit conditions. |
| Thermal Shutdown | 150°C activation - protects die during sustained overload; includes 10°C hysteresis for automatic recovery. |
Pinout & Package
TPS40222DRPRG4 uses a 3 mm × 3 mm VSON-6 (DRP) package with exposed thermal pad (θJC = 2°C/W), requiring connection to PCB ground plane via ≥3 vias for thermal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Inverting input of error amplifier | Senses output voltage via resistor divider; regulates output to 0.8 V; also controls oscillator frequency foldback below 0.6 V. |
| GND (Pin 2) | Power and signal ground reference | Common return path for control logic, power stage, and thermal pad; must be low-impedance connection to PCB ground plane. |
| SW (Pin 3) | Switch node | Drains internal MOSFET; connects to inductor and catch diode; high dv/dt node requiring minimized trace area. |
| PVIN (Pin 4) | Power input to high-side MOSFET | Carries full load current; requires ≥10-µF low-ESR ceramic bypass capacitor directly to GND. |
| AVIN (Pin 5) | Input to control circuitry | Supplies bias for internal logic and gate driver; requires ≥1-µF low-ESR ceramic bypass capacitor to GND. |
| BOOST (Pin 6) | Bootstrap supply for high-side driver | Charged via internal diode during SW low phase; drives gate above PVIN using external 33-nF capacitor to SW. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated N-channel MOSFET switch | 250 mΩ RDS(on) eliminates external high-side switch and associated gate-drive complexity. |
| Fixed-frequency current-mode control | 1.25-MHz operation with internal slope compensation ensures stable regulation under wide load and input variations. |
| Internal loop compensation | Transconductance amplifier with 12-MHz GBW and fixed 2 MΩ/16 pF network removes need for external compensation components. |
| Frequency foldback protection | Reduces switching frequency to ~75 kHz during overcurrent, lowering power dissipation without requiring external fault-handling circuitry. |
| Thermal shutdown with hysteresis | 150°C trip point and 10°C hysteresis enable safe automatic recovery after transient thermal overload. |
| Small 3 mm × 3 mm SON package | 6-pin VSON (DRP) with exposed thermal pad achieves high power density and simplified PCB layout versus SOIC or TSSOP alternatives. |
Applications
| Disk Drive Power Supply | Set-Top Box Point-of-Load |
|---|---|
Use Scenario: Supplies regulated 1.2 V or 3.3 V to HDD spindle motor controllers and servo electronics from a 5-V backplane rail. IC Role / Device Role / Timing Role: Non-synchronous buck regulator providing up to 1.6 A with fast transient response and minimal board space. Use Value: Internal MOSFET and fixed 1.25-MHz switching allow compact 2.2 µH inductor and ceramic output capacitors, reducing solution size by >40% vs. controller-only alternatives. | Use Scenario: Powers video decoder ASICs and memory interfaces in consumer STB platforms requiring stable 1.8 V or 2.5 V at up to 1.6 A. IC Role / Device Role / Timing Role: Fixed-frequency current-mode DC/DC converter delivering tightly regulated output with built-in soft-start and overcurrent protection. Use Value: 0.8-V ±1% reference and internal compensation ensure <±2% output accuracy across temperature and line/load variations without tuning. |
| ASIC Core Supply | Industrial Point-of-Load Module |
Use Scenario: Generates low-noise 0.8–3.3 V core voltage for FPGA or microprocessor subsystems in embedded industrial controllers. IC Role / Device Role / Timing Role: Buck converter with programmable output voltage, thermal shutdown, and UVLO enabling robust operation in harsh environments. Use Value: 150°C thermal shutdown and –40°C to 125°C operating junction temperature support extended industrial temperature requirements. | Use Scenario: Provides isolated, scalable 1.25-V output in modular PLC I/O modules where board space and thermal management are constrained. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator eliminating external MOSFET drivers, compensation networks, and timing resistors. Use Value: 3 mm × 3 mm SON package with exposed thermal pad enables >1.2 W power delivery in <10 mm² footprint, simplifying thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS40210DRCT | Current-mode controller (no internal MOSFET); requires external high-side FET; 1.25-MHz max frequency; adjustable UVLO. | Used where higher efficiency (>94%) or >2-A output is needed; supports synchronous rectification. | Select when designing for >1.6-A loads or requiring synchronous topology; adds complexity but improves light-load efficiency. |
| LM2678SX-ADJ/NOPB | 5-A step-down regulator with external diode; 260-kHz fixed frequency; TO-263-5 package; no internal MOSFET driver. | Targets high-current, lower-frequency applications where EMI filtering is prioritized over size. | Choose for cost-sensitive, high-output-current (>2 A) designs where 3 mm × 3 mm footprint is not required. |
Compared with TPS40222DRPRG4, TPS40210DRCT offers greater flexibility and higher current capability but demands external FET selection and compensation design, whereas LM2678SX-ADJ/NOPB provides higher output current at lower frequency and larger package-making TPS40222DRPRG4 optimal for space-constrained 1.6-A point-of-load applications.
Availability
TPS40222DRPRG4 is available at Aetrix Electronics and suitable for disk drive power supplies, set-top box point-of-load regulation, and ASIC core voltage generation requiring stable component supply and long-term production continuity.
Supply support for TPS40222DRPRG4 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and computing markets.
The TPS402xx family is designed for high-frequency, compact non-synchronous buck conversion in 5-V distributed systems, emphasizing integration, thermal performance, and ease of use in space-constrained point-of-load applications.
FAQ
What is the maximum output current supported by the TPS40222DRPRG4?
The TPS40222DRPRG4 supports up to 1.6 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 4.5–8 V). Its internal 250 mΩ N-channel MOSFET and thermal shutdown at 150°C enable reliable operation at this rating without external current sensing. Derating is required above 125°C junction temperature, where RDS(on) increases to 550 mΩ.
Does the TPS40222DRPRG4 require external compensation components?
No, the TPS40222DRPRG4 features internal loop compensation with a fixed transconductance amplifier (10 µS) and integrated 2 MΩ/16 pF network. This eliminates the need for external compensation components, simplifying design and reducing bill-of-materials count. Stability is maintained across load, line, and temperature when using recommended inductor and output capacitor values per TI's Application Report SLUS642A.
How does the TPS40222DRPRG4 handle short-circuit conditions?
The TPS40222DRPRG4 detects overcurrent via internal high-side MOSFET current sensing and responds with pulse-by-pulse current limiting and frequency foldback-reducing switching frequency from 1.25 MHz to ~75 kHz. If the fault persists, a watchdog circuit discharges the soft-start capacitor to shut down the converter, then attempts automatic restart after the fault clears.
What is the purpose of the BOOST pin on the TPS40222DRPRG4?
The BOOST pin on the TPS40222DRPRG4 provides a bootstrapped gate-drive voltage for the internal N-channel MOSFET. During the freewheeling phase, a 33-nF capacitor between BOOST and SW charges to ~VPVIN; when the MOSFET turns on, BOOST rises to ~2×VPVIN, ensuring full enhancement of the high-side switch. A Schottky diode may be added externally to improve charging efficiency in high-duty-cycle applications.
Can the TPS40222DRPRG4 operate with an input voltage below 4.5 V?
No-the TPS40222DRPRG4 has a minimum recommended input voltage of 4.5 V and an undervoltage lockout (UVLO) turn-on threshold of 3.8 V (typ). Operation below 4.5 V is outside the recommended operating conditions and may result in reduced output current capability, unstable regulation, or failure to start. The absolute maximum rating for AVIN/PVIN is –2 V to 16 V, but functional operation is only guaranteed within 4.5–8 V.
TPS40222DRPRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 8V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 7.2V
- Current - Output:
- 1.6A
- Frequency - Switching:
- 1.25MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-VSON (3x3)
TPS40222DRPRG4 FAQ
1.How can I place an order for TPS40222DRPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS40222DRPRG4 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 TPS40222DRPRG4 reliable?
The price and inventory of TPS40222DRPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS40222DRPRG4 is usually 5 days.
3.What payment methods are accepted for TPS40222DRPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS40222DRPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS40222DRPRG4?
TPS40222DRPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS40222DRPRG4 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 TPS40222DRPRG4?
For technical support, including TPS40222DRPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS40222DRPRG4 requirements.
6.How does Aetrix verify that TPS40222DRPRG4 is sourced from the original manufacturer or authorized distributors?
All TPS40222DRPRG4 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 TPS40222DRPRG4 meets industry standards.
7.What is the process for return or replacement of TPS40222DRPRG4?
All TPS40222DRPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS40222DRPRG4, 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 TPS40222DRPRG4 part is unused and in its original packaging.
Return procedure for TPS40222DRPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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