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Texas Instruments TPS62240DDCT
- Part No.:
- TPS62240DDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS62240DDCT.pdf
- Description:
- IC REG BUCK ADJ 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,925
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Product details
Overview
TPS62240DDCT from Texas Instruments is a synchronous step-down DC-DC converter optimized for battery-powered portable electronics. It delivers up to 300 mA output current from 2 V to 6 V input, supports adjustable output voltage (0.6 V to VIN), operates at 2.25 MHz fixed frequency with power-save mode, and achieves >94% peak efficiency - enabling compact, low-profile power supplies in mobile phones and Bluetooth headsets.
For engineers reviewing the TPS62240DDCT datasheet, TPS62240DDCT pinout, TPS62240DDCT application, or TPS62240DDCT equivalent, key selection considerations include its SOT-5 package footprint, 15 μA quiescent current in PFM mode, 1.5% output voltage accuracy in PWM mode, 100% duty-cycle low-dropout operation, and MODE pin-controlled transition between PWM and power-save modes.
Technical Context
The TPS62240DDCT implements voltage-mode control with input voltage feed-forward for fast line/load regulation and stable operation with small ceramic capacitors. Its dual-mode architecture automatically transitions between 2.25-MHz PWM (moderate/heavy load) and pulse-frequency modulation (PFM) at light loads, minimizing output ripple while maintaining >94% efficiency across the full 0–300 mA range.
It integrates high-side and low-side MOSFETs with typical RDS(on) of 240 mΩ and 180 mΩ, respectively, and features undervoltage lockout (1.85 V falling threshold), thermal shutdown (140 °C), soft-start (250 μs ramp-up), and 100% duty-cycle operation for extended battery runtime - all within a 2.9 mm × 1.6 mm SOT-5 package with exposed thermal pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2 V to 6 V - supports single Li-ion, two/three-cell alkaline, and 3.3/5 V rails without external regulators. |
| Output Current | Up to 300 mA - sufficient for core logic, RF transceivers, and low-power DSPs in portable devices. |
| Switching Frequency | 2.25 MHz (fixed) - enables use of tiny 2.2 µH inductors and <1-mm solution height. |
| Quiescent Current | 15 µA (PFM mode, no load) - extends battery life in standby/sleep states. |
| Output Voltage Accuracy | ±1.5% in PWM mode - ensures stable core voltage for sensitive digital ICs. |
| Efficiency | >94% peak - minimizes thermal dissipation in space-constrained handheld enclosures. |
| Shutdown Current | <1 µA - prevents battery drain during system off-state. |
| Feedback Reference | 600 mV - simplifies resistor-divider design for custom output voltages from 0.6 V to VIN. |
Pinout & Package
TPS62240DDCT uses the 5-pin SOT-23 (DDC) package: 2.90 mm × 1.60 mm body, 1.0 mm max height, with exposed thermal pad connected to GND for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 2–6 V supply; connects to input capacitor and must be decoupled per layout guidelines. |
| GND | Ground reference | Primary return path for power and control circuits; tied to thermal pad for optimal heat dissipation. |
| EN | Enable control | Active-high logic input; pulling low disables converter and reduces current draw to <1 µA. |
| FB | Feedback node | Connects to resistor divider for adjustable output; internal 0.6 V reference sets VOUT = 0.6 × (1 + R1/R2). |
| SW | Switch node | Drives external inductor; requires careful PCB routing away from noise-sensitive traces to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Power Save Mode | Automatic PFM entry below ~10 mA load - cuts quiescent current to 15 µA while maintaining regulation and low output ripple. |
| 100% Duty-Cycle Operation | Enables dropout as low as IOUT × RDS(on) - extracts maximum energy from depleting batteries down to ~2 V. |
| Fast Soft-Start | 250 µs VOUT ramp (5% → 95%) - limits inrush current and prevents input rail collapse on weak sources. |
| Integrated MOSFETs | High-side (240 mΩ) and low-side (180 mΩ) switches - eliminate external FETs and gate drivers, reducing BOM count and board area. |
| UVLO Protection | 1.85 V falling threshold - prevents brownout operation and excessive battery discharge. |
| Thermal Shutdown | 140 °C trip with 20 °C hysteresis - protects device and system under sustained overload or poor airflow. |
Applications
| Mobile Phones | Bluetooth Headsets |
|---|---|
Use Scenario: Powering baseband processor and RF front-end from single Li-ion cell (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 1.2 V or 1.8 V core voltage with dynamic load response. Use Value: 2.25 MHz switching allows ultra-small 2.2 µH inductor and 10 µF output capacitor, enabling sub-1 mm profile PCB designs. | Use Scenario: Supplying Bluetooth radio and audio codec in compact ear-worn form factor. IC Role / Device Role / Timing Role: Efficient point-of-load converter supporting intermittent 50–200 mA transmit bursts and deep-sleep current <20 µA. Use Value: Power save mode maintains 15 µA quiescent current during idle, extending talk time by >30% vs fixed-frequency alternatives. |
| WLAN Modules | Digital Cameras |
Use Scenario: Providing regulated 3.3 V supply to 802.11b/g/n transceiver IC during high-throughput data transfer. IC Role / Device Role / Timing Role: High-efficiency DC-DC stage replacing linear regulator to reduce thermal load on Wi-Fi module substrate. Use Value: >94% peak efficiency at 200 mA eliminates need for heatsinking and enables continuous streaming without thermal throttling. | Use Scenario: Powering image sensor, ISP, and LCD driver in consumer-grade digital camera with AA/AAA battery pack. IC Role / Device Role / Timing Role: Adjustable-output buck converter supporting multiple rail voltages (1.2 V, 1.8 V, 2.8 V) via resistor feedback network. Use Value: 0.6 V reference and ±1.5% accuracy ensure precise voltage scaling for sensor analog front-end and digital logic domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62242DDCT | Fixed 1.2 V output; no external feedback required; identical pinout and package. | Eliminates resistor divider but lacks output flexibility; suited for systems with static voltage requirements. | Select when 1.2 V is the sole required rail and BOM simplification is prioritized over adjustability. |
| TPS62243DDCT | Fixed 1.8 V output; same SOT-5 package and electrical specs except FB pin internally tied to output. | Reduces component count for 1.8 V logic rails but cannot support other voltages without redesign. | Choose for 1.8 V FPGA I/O, memory, or interface supplies where programmability is unnecessary. |
Compared with TPS62242DDCT and TPS62243DDCT, the TPS62240DDCT provides full output voltage adjustability (0.6–VIN) at the cost of two external resistors - making it the only option among the three for multi-rail or future-proofed designs requiring voltage scalability.
Availability
TPS62240DDCT is available at Aetrix Electronics and suitable for mobile phones, Bluetooth headsets, and WLAN modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS62240DDCT 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, embedded processing, and power management technologies, with decades of leadership in high-efficiency DC-DC conversion.
The TPS6224x product line was designed specifically for space-constrained, battery-operated portable electronics - delivering high efficiency, ultra-low quiescent current, and minimal solution size in sub-3 mm² packages.
FAQ
What is the minimum input voltage required for TPS62240DDCT to maintain regulation at 300 mA output?
The minimum input voltage depends on output voltage, load current, and MOSFET RDS(on). For example, at VOUT = 1.8 V and IOUT = 300 mA, VINmin ≈ 1.8 V + (0.3 A × 0.48 Ω) + LDCR ≈ 1.95 V. The TPS62240DDCT enters 100% duty cycle below this point, sustaining regulation down to ~2 V input with reduced headroom.
Can TPS62240DDCT operate without the MODE pin connection?
Yes - the MODE pin is only present on the WSON (DRV) package, not on the SOT-5 (DDC) package used by TPS62240DDCT. Therefore, TPS62240DDCT defaults to automatic power-save mode (PFM/PWM transition) and does not require external MODE pin biasing.
What is the recommended output capacitor for TPS62240DDCT in a 1.2 V @ 300 mA application?
Texas Instruments recommends a 10 µF X5R/X7R ceramic capacitor (e.g., Murata GRM188R60J106M) placed close to the FB and SW pins. This value balances low ESR, stable capacitance over temperature/voltage, and optimal PFM-mode ripple suppression when paired with a 2.2 µH inductor.
Does TPS62240DDCT support forced PWM mode for noise-sensitive applications?
No - forced PWM mode requires the MODE pin, which is absent on the SOT-5 (DDC) package. Only the WSON (DRV) variants (e.g., TPS62240DRV) support MODE pin control. TPS62240DDCT operates exclusively in auto-transition mode between PWM and PFM.
How does the TPS62240DDCT handle short-circuit conditions on the output?
TPS62240DDCT includes cycle-by-cycle current limiting on both high-side and low-side MOSFETs, with a typical current limit of 0.7 A. During overload, it enters hiccup mode - latching off for several milliseconds after current-limit trips, then attempting restart - preventing thermal runaway and enabling self-recovery once fault clears.
TPS62240DDCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 2V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 300mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS62240DDCT FAQ
1.How can I place an order for TPS62240DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62240DDCT 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 TPS62240DDCT reliable?
The price and inventory of TPS62240DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62240DDCT is usually 5 days.
3.What payment methods are accepted for TPS62240DDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62240DDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62240DDCT?
TPS62240DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62240DDCT 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 TPS62240DDCT?
For technical support, including TPS62240DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62240DDCT requirements.
6.How does Aetrix verify that TPS62240DDCT is sourced from the original manufacturer or authorized distributors?
All TPS62240DDCT 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 TPS62240DDCT meets industry standards.
7.What is the process for return or replacement of TPS62240DDCT?
All TPS62240DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62240DDCT, 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 TPS62240DDCT part is unused and in its original packaging.
Return procedure for TPS62240DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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