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Texas Instruments TPS62203DBVT
- Part No.:
- TPS62203DBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS62203DBVT.pdf
- Description:
- IC REG BUCK 3.3V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,256
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Product details
Overview
TPS62203DBVT from Texas Instruments is a synchronous step-down DC-DC converter in a 5-pin SOT-23 package, delivering fixed 3.3 V output at up to 300 mA with 2.5 V–6 V input range, 1 MHz fixed-frequency PWM operation, and 15 µA typical quiescent current in power save mode. It powers low-voltage microcontrollers and RF modules in battery-powered portable equipment.
For engineers reviewing the TPS62203DBVT datasheet, TPS62203DBVT pinout, TPS62203DBVT application, or TPS62203DBVT equivalent, key selection considerations include its fixed 3.3 V output, SOT-23 thermal performance (RθJA = 220 °C/W), dynamic voltage positioning for transient headroom, and compatibility with 4.7 µF input / 10 µF ceramic output capacitors.
Technical Context
The TPS62203DBVT employs a voltage-mode PWM controller with input voltage feed-forward, enabling fast line/load regulation using only small ceramic capacitors. Its dual-MOSFET synchronous architecture integrates a P-channel high-side switch (rDS(on) ≤ 850 mΩ at 2.5 V) and N-channel rectifier (rDS(on) ≤ 660 mΩ at 2.5 V).
It operates in fixed-frequency PWM mode above ~66 mA load and transitions to pulse-frequency modulation (PFM) power save mode below that threshold, reducing switching frequency and quiescent current to 15 µA while maintaining ±3% output accuracy across 0–300 mA load and –40°C to 85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±3% over 0–300 mA load and full temperature range; no external feedback resistors required. |
| Input Voltage Range | 2.5 V to 6.0 V - supports single-cell Li-ion (2.7–4.2 V), 3-cell NiMH/NiCd, or standard 3.3 V/5 V rails. |
| Max Output Current | 300 mA continuous - sufficient for low-power MCUs, sensors, and Bluetooth/Wi-Fi baseband ICs. |
| Switching Frequency | 1 MHz nominal (650–1500 kHz range) - enables compact 10 µH inductor and minimal EMI filtering. |
| Quiescent Current | 15 µA typical in power save mode - extends battery life in standby/sleep states of portable devices. |
| Efficiency Peak | Up to 95% at 200 mA with 3.7 V input → 3.3 V output - minimizes thermal stress in space-constrained SOT-23 layout. |
| Thermal Resistance | RθJA = 220 °C/W - requires careful PCB copper pour design for >150 mW dissipation at full load. |
Pinout & Package
TPS62203DBVT is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm with standard lead pitch and gull-wing terminals. Thermal performance relies on PCB copper area connected to pin 2 (GND) as primary heat path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Power input supply | Accepts 2.5–6 V; must be decoupled with ≥4.7 µF ceramic capacitor placed adjacent to pin. |
| 2 - GND | Ground reference | Primary thermal and electrical return; requires direct connection to large PCB ground plane for thermal management. |
| 3 - EN | Enable control input | Active-high logic: tie to VI for operation, to GND for shutdown (0.1 µA IQ); must not float. |
| 4 - FB | Feedback sense | Internally connected to 3.3 V divider; unused in fixed-output version - leave unconnected per datasheet. |
| 5 - SW | Switch node | Drives external inductor; carries high di/dt; requires short, low-inductance trace to minimize ringing and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Positioning | Output rises +0.8% above 3.3 V at light load to provide headroom during sudden load transients to full 300 mA. |
| 100% Duty Cycle Operation | Maintains regulation down to VIN ≈ VOUT + IOUT×rDS(on), extending usable battery voltage range in Li-ion applications. |
| Integrated Soft Start | Digital current-ramping startup limits inrush; typical 800 µs rise time with 10 µF output cap and 200 mA load. |
| Undervoltage Lockout (UVLO) | Enables only above ~1.75 V (typical threshold), preventing erratic operation during battery brownout or cold start. |
| Synchronous Rectification | Eliminates external Schottky diode; reduces conduction loss and improves efficiency vs. asynchronous buck converters. |
Applications
| Smartphone Baseband Power | Portable Medical Sensor Node |
|---|---|
|
Use Scenario: Powers ARM Cortex-M0+ MCU and BLE radio subsystem from single Li-ion cell in compact wearable form factor. IC Role / Device Role / Timing Role: Primary 3.3 V system rail regulator; supplies digital core, peripherals, and RF interface with tight transient response. Use Value: Dynamic voltage positioning ensures <100 mV droop during 0→300 mA 10 µs load steps; 15 µA quiescent current enables multi-week standby. |
Use Scenario: Supplies ultra-low-power ECG front-end ASIC and flash memory in disposable patch monitor. IC Role / Device Role / Timing Role: Efficient conversion from depleted 2.7 V battery to stable 3.3 V for analog signal chain and data logging. Use Value: 100% duty cycle operation sustains regulation until battery reaches 3.35 V, maximizing usable capacity; SOT-23 footprint fits 8 mm × 8 mm PCB area. |
| Industrial Handheld Scanner | IoT Edge Node Controller |
|
Use Scenario: Provides regulated 3.3 V to laser driver, image sensor, and Wi-Fi SoC in ruggedized barcode reader. IC Role / Device Role / Timing Role: Main power stage handling pulsed 250 mA loads during scan bursts while maintaining EMI compliance. Use Value: 1 MHz switching allows small 10 µH inductor and avoids AM radio band; soft start prevents input rail collapse during cold boot. |
Use Scenario: Powers LoRa transceiver and environmental sensor hub operating on AA batteries for 5+ years. IC Role / Device Role / Timing Role: High-efficiency buck converter enabling deep-sleep current budgets below 1 µA system-wide. Use Value: 95% peak efficiency at 100 mA reduces self-heating in sealed enclosure; UVLO prevents malfunction during battery replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62202DBVT | Fixed 1.8 V output; identical package, pinout, and specs otherwise. | Requires redesign of downstream logic voltage levels; unsuitable where 3.3 V I/O or interface standards apply. | Select only when system architecture mandates 1.8 V core rail and no level-shifting is feasible. |
| TPS62231DBVT | Same SOT-23-5 package but higher 600 mA output, 2.05–6.0 V input, and 3.5 µA shutdown current. | Supports heavier loads and wider input range; may require updated loop compensation due to different internal compensation. | Preferred for future-proofing or when margin for peak current surges >300 mA is needed; verify stability with existing 10 µH inductor. |
Compared with TPS62203DBVT, TPS62202DBVT offers identical efficiency and thermal behavior but targets 1.8 V systems, while TPS62231DBVT provides higher current headroom and lower shutdown current at the cost of slightly reduced light-load efficiency due to increased gate drive overhead.
Availability
TPS62203DBVT is available at Aetrix Electronics and suitable for portable medical devices, industrial handheld scanners, and IoT edge nodes requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for TPS62203DBVT 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 industrial applications.
The TPS6220x product line was designed specifically for space-constrained, battery-powered systems requiring high light-load efficiency, minimal external components, and robust transient response - targeting PDAs, smartphones, and portable instrumentation.
FAQ
What is the recommended input capacitor for TPS62203DBVT?
The TPS62203DBVT requires a minimum 4.7 µF ceramic input capacitor (X5R/X7R, 0805 case) placed directly between VI and GND pins. TI recommends Taiyo Yuden JMK212BY475MG for optimal ESR (<15 mΩ) and ripple current handling. Larger values improve transient response but do not degrade stability; avoid tantalum due to higher ESR and voltage coefficient effects.
Does TPS62203DBVT require external feedback resistors?
No, TPS62203DBVT is the fixed 3.3 V output variant - its internal resistor divider sets the output voltage, and the FB pin is internally terminated. External resistors are unnecessary and must not be connected; doing so would disrupt regulation and violate the device's specified operating conditions.
How does TPS62203DBVT behave during battery voltage drop near end-of-life?
TPS62203DBVT maintains regulation via 100% duty cycle operation down to VIN ≈ 3.35 V (at 300 mA, 25°C), leveraging its P-channel high-side switch. Below UVLO threshold (~1.75 V), it shuts down cleanly with 0.1 µA quiescent current. This extends usable battery capacity in single-cell Li-ion systems without requiring external supervision circuitry.
Can TPS62203DBVT be used with a 6.8 µH inductor?
Yes - TI qualifies 6.8 µH (e.g., Sumida CDRH3D16-6R8) as an alternative for minimized solution size. Using 6.8 µH increases peak inductor current and ripple (~35% vs. 20% with 10 µH) but remains within safe limits for 300 mA output. Efficiency drops <1% at full load; ensure inductor saturation current rating exceeds 670 mA.
What is the maximum junction temperature for continuous operation of TPS62203DBVT?
The absolute maximum junction temperature for TPS62203DBVT is 150°C, but recommended continuous operation limits junction temperature to ≤125°C (per Recommended Operating Conditions). With RθJA = 220 °C/W, this requires keeping power dissipation below 114 mW - achievable with ≥1 cm² of 2-oz copper connected to GND pin under 85°C ambient.
TPS62203DBVT 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):
- 3.3V
- 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
TPS62203DBVT FAQ
1.How can I place an order for TPS62203DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62203DBVT 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 TPS62203DBVT reliable?
The price and inventory of TPS62203DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62203DBVT is usually 5 days.
3.What payment methods are accepted for TPS62203DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62203DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62203DBVT?
TPS62203DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62203DBVT 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 TPS62203DBVT?
For technical support, including TPS62203DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62203DBVT requirements.
6.How does Aetrix verify that TPS62203DBVT is sourced from the original manufacturer or authorized distributors?
All TPS62203DBVT 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 TPS62203DBVT meets industry standards.
7.What is the process for return or replacement of TPS62203DBVT?
All TPS62203DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62203DBVT, 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 TPS62203DBVT part is unused and in its original packaging.
Return procedure for TPS62203DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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