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Texas Instruments TPS62208DBVT
- Part No.:
- TPS62208DBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS62208DBVT.pdf
- Description:
- IC REG BUCK 1.875V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:285
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Product details
Overview
TPS62208DBVT from Texas Instruments is a synchronous step-down DC-DC converter in a 5-pin SOT-23 package, delivering fixed 1.875 V output at up to 300 mA with 1 MHz PWM switching and power-save mode operation. It supports 2.5 V–6 V input, achieves up to 95% efficiency at 200 mA (VI = 3.7 V), and features 15 µA quiescent current in light-load PFM mode-enabling long battery life in portable Li-Ion-powered devices like smart phones and PDAs.
For engineers reviewing the TPS62208DBVT datasheet, TPS62208DBVT pinout, TPS62208DBVT application, or TPS62208DBVT equivalent, key selection considerations include its fixed 1.875 V output voltage accuracy (±3%), undervoltage lockout (1.5–2.0 V), soft-start behavior (~800 µs with 10 µF CO), and compatibility with low-ESR ceramic capacitors (4.7 µF CI, 10 µF CO) and 10 µH inductors.
Technical Context
The TPS62208DBVT employs a voltage-mode PWM controller with input-voltage feed-forward for fast line/load regulation and stable operation with small ceramic capacitors. Its dual-MOSFET synchronous architecture uses a P-channel high-side switch (rDS(on) = 670–850 mΩ at 2.5 V) and N-channel rectifier (rDS(on) = 530–660 mΩ at 2.5 V), enabling 100% duty-cycle low-dropout operation down to VIN ≈ VOUT + IOUT·rDS(on) + IOUT·RL.
In power-save mode, it transitions to pulse-frequency modulation (PFM) below ~66 mA load, reducing switching frequency and quiescent current to 15 µA typical while maintaining dynamic voltage positioning-holding output 0.8% above nominal during light load to minimize transient droop. Enable (EN) logic requires ≥1.3 V high and ≤0.4 V low, with shutdown current <1 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.875 V ±3% over 0–300 mA load and 2.5–6 V input-ensures stable core supply for low-voltage DSPs and processors without external feedback resistors. |
| Input Voltage Range | 2.5 V to 6.0 V-supports single-cell Li-Ion (2.7–4.2 V), 3-cell NiMH/NiCd (3.6–4.5 V), and standard 3.3 V/5 V rails. |
| Max Output Current | 300 mA continuous-sufficient for powering baseband processors, RF ICs, and memory in handheld devices. |
| Switching Frequency | 650–1500 kHz (typ. 1 MHz)-enables compact 10 µH inductor and 10 µF ceramic output capacitor designs. |
| Quiescent Current | 15 µA typical in power-save mode-extends battery runtime in standby/sleep states of portable electronics. |
| Efficiency | Up to 95% at 200 mA (VIN = 3.7 V, VOUT = 1.8 V)-minimizes thermal stress and extends operating time in space-constrained applications. |
| Enable Threshold | VEN(HI) ≥ 1.3 V, VEN(LO) ≤ 0.4 V-allows direct interfacing with GPIOs or battery monitors without level-shifting. |
Pinout & Package
TPS62208DBVT is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm with standard lead pitch and thermal pad omitted. Pin functions are validated per TI SLVS417F Rev F (June 2015).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Input supply voltage | Accepts 2.5–6 V; must be decoupled with ≥4.7 µF ceramic capacitor placed adjacent to pin for EMI suppression and transient stability. |
| 2 - GND | Power ground | Primary return path for input/output currents and internal control circuitry; requires low-impedance PCB connection to minimize noise coupling. |
| 3 - EN | Enable control input | Active-high logic: ≥1.3 V enables regulation; ≤0.4 V forces shutdown (<1 µA IQ); must not float-tie to VI or MCU GPIO. |
| 4 - FB | Feedback reference | Internally connected to 0.5 V reference for fixed-output variants; unused in TPS62208DBVT-leave unconnected per datasheet. |
| 5 - SW | Switch node | Drives external 10 µH inductor; carries high di/dt square-wave current-requires short, wide trace and tight loop with L/C2 to limit EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated P-channel high-side and N-channel low-side MOSFETs eliminate external diode, reducing conduction loss and improving efficiency >90% at light loads. |
| Dynamic voltage positioning | Maintains output 0.8% above nominal during light load (PFM mode), providing headroom to absorb load-step transients without undershoot-enables use of only 10 µF CO. |
| Soft-start circuit | Digital ramp limits inrush current in steps (60/120/240/480 mA), achieving ~800 µs startup with 10 µF CO and 200 mA load-prevents input rail collapse from battery or high-Z sources. |
| 100% duty-cycle operation | Enables dropout as low as VOUT + IOUT·rDS(on), extending usable battery range down to ~1.95 V at 300 mA-critical for single-cell Li-Ion systems. |
| Undervoltage lockout (UVLO) | Activates below 1.5–2.0 V input, preventing erratic switching or latch-up during brownout-ensures clean startup and shutdown sequencing. |
Applications
| Smartphone Baseband Power | PDA Processor Core Supply |
|---|---|
|
Use Scenario: Powers ARM-based application processor core requiring stable 1.875 V at up to 300 mA in a slim smartphone form factor with Li-Ion battery. IC Role / Device Role / Timing Role: Primary step-down regulator converting battery voltage (3.0–4.2 V) to fixed 1.875 V core rail; operates in PWM mode during active use and PFM during idle. Use Value: 95% peak efficiency and 15 µA quiescent current extend talk time by >12% versus non-synchronous alternatives; 1.875 V matches common DSP I/O voltage standards. |
Use Scenario: Supplies low-voltage microcontroller core in handheld PDA with 3.3 V system rail and intermittent high-current bursts. IC Role / Device Role / Timing Role: Fixed-output buck converter delivering regulated 1.875 V from 3.3 V input; enters PFM mode between user interactions to conserve energy. Use Value: Dynamic voltage positioning reduces output capacitor size to 10 µF while maintaining <3% transient droop during 100 mA → 300 mA load steps-saving board area and cost. |
| Digital Camera Sensor Bias | Portable Media Player Audio Codec |
|
Use Scenario: Provides clean, low-noise 1.875 V bias for CMOS image sensor analog front-end in battery-powered digital camera. IC Role / Device Role / Timing Role: Dedicated point-of-load regulator; uses ceramic input/output caps and tight layout to suppress switching noise from sensitive analog circuits. Use Value: 1 MHz fixed frequency allows easy filtering with small LC components; <1% output ripple in PFM mode ensures minimal sensor pattern noise. |
Use Scenario: Powers stereo audio codec IC in portable media player running from 3.7 V Li-Ion battery with variable playback workload. IC Role / Device Role / Timing Role: Efficient DC-DC source for codec's digital core; soft-start prevents pop/click during power-on; enable pin synchronizes with system wake-up signals. Use Value: 100% duty-cycle capability sustains regulation down to 2.0 V battery voltage-extending playback time beyond competing 2.5 V minimum-input regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62202DBVT | Fixed 1.8 V output (vs. TPS62208DBVT's 1.875 V); identical package, pinout, and electrical specs otherwise. | Suitable where 1.8 V logic compliance is required instead of 1.875 V-common in older DSP families and certain FPGA I/O banks. | Select TPS62202DBVT only if system-level voltage tolerance permits 75 mV lower output; no PCB changes needed. |
| TPS62205DBVT | Fixed 2.5 V output; same 5-pin SOT-23 package and 300 mA rating but higher VOUT and slightly reduced efficiency at light loads due to higher rDS(on) impact. | Used for powering 2.5 V analog peripherals (e.g., ADCs, DACs) or legacy logic-requires different feedback network if adjustable version were used (not applicable here). | Choose TPS62205DBVT when 2.5 V rail is needed; verify that 2.5 V meets downstream device absolute maximum ratings before substitution. |
Compared with TPS62202DBVT and TPS62205DBVT, the TPS62208DBVT provides a precise 1.875 V output optimized for modern low-voltage DSP cores and RF transceivers, offering identical thermal performance and footprint while enabling tighter voltage margining than 1.8 V or 2.5 V alternatives.
Availability
TPS62208DBVT is available at Aetrix Electronics and suitable for smartphone baseband power, PDA processor core supply, digital camera sensor bias, and portable media player audio codec applications requiring stable component supply, consistent parametric performance, and long-term production support.
Supply support for TPS62208DBVT 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 TPS6220x product line was designed specifically for space-constrained, battery-operated devices requiring high efficiency across wide load ranges-from 15 µA quiescent current in sleep mode to 300 mA full-load delivery in a 5-pin SOT-23 package.
FAQ
What is the exact output voltage of the TPS62208DBVT?
The TPS62208DBVT delivers a fixed output voltage of 1.875 V with ±3% tolerance over temperature (–40°C to 85°C), load (0–300 mA), and input voltage (2.5–6 V). This value is factory-trimmed and does not require external resistors-unlike the adjustable TPS62200 variant. The 1.875 V output aligns with common low-voltage DSP core and RF IC supply requirements.
Does the TPS62208DBVT require external feedback components?
No, the TPS62208DBVT does not require external feedback components. As a fixed-output variant, its internal reference and feedback divider are pre-configured for 1.875 V; the FB pin is internally connected and must remain unconnected in the circuit. This simplifies layout, reduces BOM count, and eliminates resistor tolerance errors affecting output accuracy.
What is the recommended inductor value for the TPS62208DBVT?
Texas Instruments specifies a 10 µH inductor as optimal for the TPS62208DBVT, balancing efficiency (>90% at mid-load), transient response, and physical size. Recommended parts include Sumida CDRH5D28-100 (high efficiency) and Coilcraft DO1608-103. Inductor DC resistance should be minimized (<150 mΩ) to reduce conduction losses, and saturation current rating must exceed 670 mA.
How does the TPS62208DBVT behave during battery voltage drop?
As input voltage declines, the TPS62208DBVT maintains regulation via 100% duty-cycle operation-keeping the P-channel switch fully on-down to approximately VOUT + IOUT·rDS(on). At 300 mA and 2.5 V input, this enables functional operation until VIN reaches ~1.95 V, maximizing usable capacity from a single-cell Li-Ion battery before UVLO (1.5–2.0 V) disables the device.
Can the TPS62208DBVT be used with ceramic output capacitors?
Yes, the TPS62208DBVT is explicitly designed for ceramic output capacitors-TI recommends a 10 µF, X5R/X7R, 0805-case ceramic capacitor (e.g., Taiyo Yuden JMK212BJ106MG). Its advanced voltage-mode control ensures stability and minimal transient overshoot/undershoot with low-ESR ceramics, eliminating need for larger, less reliable tantalum or electrolytic types.
TPS62208DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.875V
- Voltage - Output (Max):
- -
- Current - Output:
- 300mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS62208DBVT FAQ
1.How can I place an order for TPS62208DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62208DBVT 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 TPS62208DBVT reliable?
The price and inventory of TPS62208DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62208DBVT is usually 5 days.
3.What payment methods are accepted for TPS62208DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62208DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62208DBVT?
TPS62208DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62208DBVT 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 TPS62208DBVT?
For technical support, including TPS62208DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62208DBVT requirements.
6.How does Aetrix verify that TPS62208DBVT is sourced from the original manufacturer or authorized distributors?
All TPS62208DBVT 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 TPS62208DBVT meets industry standards.
7.What is the process for return or replacement of TPS62208DBVT?
All TPS62208DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62208DBVT, 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 TPS62208DBVT part is unused and in its original packaging.
Return procedure for TPS62208DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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