My Inquiry
My Account
Texas Instruments TPS40222DRPT
- Part No.:
- TPS40222DRPT
- Manufacturer:
- Texas Instruments
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
TPS40222DRPT.pdf
- Description:
- IC REG BUCK ADJ 1.6A 6VSON
- Quantity:
- Payment:
- Shipping:
Inventory:670
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS40222DRPT from Texas Instruments is a non-synchronous buck converter IC with integrated 250 mΩ N-channel MOSFET, fixed 1.25-MHz switching frequency, 0.8-V ±1% reference, and 0 A to 1.6-A output current capability. It operates from 4.5 V to 8 V input and supports adjustable output voltages down to 0.8 V - used in point-of-load power for ASICs and disk drives.
For engineers reviewing the TPS40222DRPT datasheet, TPS40222DRPT pinout, TPS40222DRPT application, or TPS40222DRPT equivalent, this page delivers verified technical context, validated pin functions, confirmed efficiency curves (up to 92% at 1.25 V/1.6 A), thermal shutdown behavior, and real-world soft-start timing (550 µs typical).
Technical Context
The TPS40222DRPT employs fixed-frequency current-mode control with internal slope compensation derived from oscillator ramp and sensed high-side MOSFET current - eliminating external sense resistors. Its transconductance error amplifier (10 µS, 12 MHz GBW) features internal 2 MΩ/16 pF compensation, enabling stable regulation without loop tuning.
Startup uses voltage-controlled frequency foldback: oscillator sweeps from ~140 kHz (FB = 0 V) to 1.25 MHz (FB ≥ 0.6 V), with soft-start time of 550 µs. Protection includes pulse-by-pulse overcurrent detection (2.6 A typ), thermal shutdown (150°C), and undervoltage lockout (3.8 V turn-on with 0.4 V hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.25 MHz nominal - enables use of small 2.2–3.3 µH inductors and reduces EMI filter size. |
| Output Current | 0–1.6 A continuous - supported by internal 250 mΩ N-channel MOSFET (RDS(on) max 550 mΩ at 125°C). |
| Feedback Reference | 0.8 V ±1% - sets output voltage via external resistor divider; enables 0.8 V to 90% VIN range. |
| Efficiency | Up to 92% at 5 VIN/1.25 VOUT/1.6 A - achieved via low RDS(on), optimized gate drive, and minimal quiescent current (1.5 mA). |
| Soft-Start Time | 550 µs typical - prevents inrush current; controlled by internal capacitor, not external components. |
| Operating Temp | –40°C to +125°C junction - validated across full range; thermal pad provides θJC = 2°C/W. |
| UVLO Threshold | 3.8 V turn-on with 0.4 V hysteresis - ensures clean startup from 5 V distributed rails and prevents brownout oscillation. |
Pinout & Package
TPS40222DRPT is housed in a thermally enhanced 3 mm × 3 mm plastic VSON (DRP) package with exposed thermal pad (connected to GND). The 6-pin layout supports compact point-of-load designs with low-inductance power paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN (Pin 5) | Control supply input | Bypassed to GND with ≥1 µF ceramic; powers internal logic and bias circuits - separate from power path. |
| PVIN (Pin 4) | Power supply input | Connected to main input rail (4.5–8 V); bypassed to GND with ≥10 µF low-ESR capacitor - feeds high-side MOSFET. |
| SW (Pin 3) | Switch node | Drain of internal MOSFET; connects to inductor and catch diode - high dv/dt node requiring minimized trace area. |
| BOOST (Pin 6) | Bootstrap supply | Charged via internal diode during SW low phase; supplies >VIN gate drive for MOSFET - requires 33 nF capacitor to SW. |
| FB (Pin 1) | Error amplifier inverting input | Senses output via resistor divider; regulates to 0.8 V; also controls frequency foldback during fault/startup. |
| GND (Pin 2) | Ground reference | Analog and power ground; must be tied to exposed thermal pad - critical for thermal performance and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High-Side MOSFET | 250 mΩ RDS(on) at 25°C - eliminates external switch, reduces BOM count, and simplifies layout. |
| Internal Loop Compensation | Fixed 2 MΩ/16 pF network - removes need for external compensation components and ensures stability across recommended L/C ranges. |
| Current-Mode Control | Pulse-by-pulse current limiting with no external sense resistor - improves transient response and enables accurate overcurrent protection. |
| Frequency Foldback Protection | Reduces switching frequency from 1.25 MHz to ~75 kHz during short-circuit - limits power dissipation and enables safe fault recovery. |
| Thermal Shutdown with Hysteresis | Triggers at 150°C junction, resets at 140°C - prevents thermal runaway while allowing automatic restart after cooldown. |
Applications
| Disk Drive Power Supply | ASIC Core Voltage Regulation |
|---|---|
Use Scenario: Provides tightly regulated 1.2 V or 1.8 V core voltage to HDD controller ASICs under dynamic load steps up to 1.6 A. IC Role / Device Role / Timing Role: Non-synchronous buck regulator with internal MOSFET and fixed 1.25-MHz clock - delivers fast transient response and low output ripple. Use Value: Eliminates external high-side switch and compensation network; achieves >90% efficiency at 1.25 V/1.6 A with 3.3 µH inductor and 44 µF ceramic output capacitance. |
Use Scenario: Powers FPGA or DSP I/O banks requiring 3.3 V at up to 1.5 A from a 5 V backplane rail. IC Role / Device Role / Timing Role: Adjustable-output buck converter with 0.8 V reference and frequency foldback - maintains regulation during bus voltage sag or load surges. Use Value: Supports output as high as 4.5 V (90% of 5 V input); soft-start prevents inrush into large I/O capacitance; thermal pad sustains operation at 125°C ambient. |
| Set-Top Box Point-of-Load | Industrial Sensor Node DC-DC |
Use Scenario: Generates 1.2 V for video processing SoC in space-constrained STB designs where board area is limited. IC Role / Device Role / Timing Role: Compact 3 mm × 3 mm SON buck converter with integrated power switch - replaces discrete controller + MOSFET solution. Use Value: Reduces footprint by >40% vs. two-chip alternatives; 1.25-MHz operation allows 2.2 µH inductor and 22 µF output caps - cuts total solution size. |
Use Scenario: Supplies 0.8–3.3 V to ultra-low-power microcontrollers and analog front-ends in battery-backed industrial sensors. IC Role / Device Role / Timing Role: Efficient step-down regulator with 1.5 mA quiescent current and UVLO hysteresis - extends runtime and prevents brownout resets. Use Value: Delivers 92% peak efficiency at light loads (100 mA); FB pin programmability enables precise voltage matching to sensor IC requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54227DRCT | 2-A synchronous buck with integrated high- and low-side MOSFETs; 4.5–18 V input; 0.76 V reference; requires external compensation. | Higher current, wider VIN, but larger 3.5 mm × 3.5 mm QFN package and no frequency foldback - less robust under sustained short-circuit. | Choose TPS54227DRCT when >1.6 A output or synchronous efficiency (>94%) is required; avoid if board space or fault robustness is critical. |
| MP2307DN-LF-Z | 2-A non-synchronous buck; 4.5–23 V input; 0.92 V reference; 340 kHz fixed frequency; external compensation required. | Lower switching frequency increases inductor/capacitor size; lacks thermal shutdown and precise UVLO hysteresis - higher risk of thermal failure in sealed enclosures. | Choose MP2307DN-LF-Z only for cost-sensitive, non-thermal-critical 5 V–12 V input applications; verify loop stability with each L/C combination. |
Compared with TPS54227DRCT and MP2307DN-LF-Z, the TPS40222DRPT offers superior thermal protection, smaller footprint, and built-in frequency foldback - making it optimal for space-constrained, reliability-critical 5 V input systems where 1.6 A output suffices.
Availability
TPS40222DRPT is available at Aetrix Electronics and suitable for disk drive power supplies, ASIC core voltage regulation, and set-top box point-of-load applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS40222DRPT 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 IC design and manufacturing.
The TPS402xx family was engineered for high-density, cost-sensitive DC-DC conversion in consumer and computing applications - emphasizing integration, thermal resilience, and ease of use with minimal external components.
FAQ
What is the maximum output current supported by the TPS40222DRPT?
The TPS40222DRPT supports up to 1.6 A of continuous output current, as validated across the full operating temperature range (–40°C to +125°C junction). This rating assumes proper PCB thermal design - including connection of the exposed thermal pad to a solid ground plane using ≥3 vias - and use of recommended input/output capacitors and inductor values per TI SLUS642A.
Does the TPS40222DRPT require external compensation components?
No, the TPS40222DRPT includes fully internal loop compensation via a fixed 2 MΩ resistor and 16 pF capacitor network. This eliminates external compensation parts and guarantees stability when using inductors and output capacitors within the ranges specified in Table 2 of the datasheet - e.g., 2.2 µH inductor with ≥21 µF output capacitance for 3.3 V output.
How does the TPS40222DRPT protect against short-circuit conditions?
The TPS40222DRPT implements dual-layer short-circuit protection: (1) pulse-by-pulse current limiting triggers at 2.6 A (typical), clamping on-time; (2) frequency foldback reduces switching frequency from 1.25 MHz to ~75 kHz as FB voltage drops below 0.4 V, lowering power dissipation. If the fault persists, thermal shutdown activates at 150°C.
Can the TPS40222DRPT operate with an input voltage lower than 4.5 V?
No - the absolute minimum input voltage is 4.5 V per the Recommended Operating Conditions table. Below this, the device may fail to start or regulate properly due to undervoltage lockout activation (turn-on threshold is 3.8 V, but operation requires ≥4.5 V to sustain gate drive and internal bias). Attempting operation at 4.2 V risks intermittent dropout and thermal stress.
What is the purpose of the BOOST pin on the TPS40222DRPT?
The BOOST pin on the TPS40222DRPT supplies the gate drive voltage for the internal N-channel MOSFET. During the freewheeling phase, a 33 nF capacitor between BOOST and SW charges to ~VIN; when the MOSFET turns on, BOOST rises to ~2×VIN, ensuring full enhancement of the high-side switch - critical for low RDS(on) conduction and efficiency.
TPS40222DRPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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)
TPS40222DRPT FAQ
1.How can I place an order for TPS40222DRPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS40222DRPT 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 TPS40222DRPT reliable?
The price and inventory of TPS40222DRPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS40222DRPT is usually 5 days.
3.What payment methods are accepted for TPS40222DRPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS40222DRPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS40222DRPT?
TPS40222DRPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS40222DRPT 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 TPS40222DRPT?
For technical support, including TPS40222DRPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS40222DRPT requirements.
6.How does Aetrix verify that TPS40222DRPT is sourced from the original manufacturer or authorized distributors?
All TPS40222DRPT 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 TPS40222DRPT meets industry standards.
7.What is the process for return or replacement of TPS40222DRPT?
All TPS40222DRPT units undergo pre-shipment inspection (PSI). If there is an issue with TPS40222DRPT, 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 TPS40222DRPT part is unused and in its original packaging.
Return procedure for TPS40222DRPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS40222DRPT Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
