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Texas Instruments TPS781330220DDCT
- Part No.:
- TPS781330220DDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS781330220DDCT.pdf
- Description:
- IC REG LIN 3.3V/2.2V 150MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:897
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Product details
Overview
TPS781330220DDCT from Texas Instruments is a 150mA ultralow-power LDO regulator with pin-selectable dual output voltages (3.3V HIGH / 2.2V LOW), 1µA quiescent current, 200mV dropout at 150mA, and ±3% output accuracy over load/line/temperature - designed for battery-powered microcontroller sleep/wake power rails.
For engineers reviewing the TPS781330220DDCT datasheet, TPS781330220DDCT pinout, TPS781330220DDCT application, or TPS781330220DDCT equivalent, key selection criteria include VSET-controlled dynamic voltage scaling, TSOT23-5 package compatibility, 1.0µF ceramic capacitor stability, thermal shutdown behavior, and TI MSP430 interface timing requirements.
Technical Context
The TPS781330220DDCT implements factory-programmed EPROM-based dual-voltage selection: VSET ≤0.4V selects 3.3V output (HIGH), VSET ≥1.2V selects 2.2V output (LOW). Its bandgap reference and active pull-down circuitry enable sub-800µs voltage transitions under 150mA load without external discharge path.
It operates across –40°C to +125°C junction temperature, supports input voltages from 2.2V to 5.5V, and delivers stable regulation with only 1.0µF output capacitance - eliminating need for bulk capacitance in space-constrained portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 150mA max - sufficient to power MSP430 active mode and peripheral logic without derating at +85°C. |
| Quiescent Current | 1µA - enables >1-year battery life in smoke detectors and wireless sensors operating in ultra-low-power sleep states. |
| Dropout Voltage | 200mV at 150mA - allows operation down to 2.4V input when regulating 2.2V output, extending usable battery range. |
| Output Accuracy | ±3% over load/line/temperature - ensures reliable MCU core voltage margin across industrial temperature extremes. |
| Stability Capacitor | 1.0µF ceramic - eliminates need for tantalum or large electrolytic capacitors, reducing PCB area and BOM cost. |
| VSET Logic Thresholds | VSET low: ≤0.4V (selects 3.3V); VSET high: ≥1.2V (selects 2.2V) - compatible with standard CMOS GPIO without level-shifting. |
| Shutdown Current | 18nA - reduces system standby leakage to negligible levels during deep-sleep modes. |
Pinout & Package
TPS781330220DDCT uses the TSOT23-5 package (2.9mm × 1.6mm × 1.0mm), optimized for high-density portable PCB layouts. Thermal performance is rated at RθJA = 200°C/W on standard JEDEC board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 5) | Regulated output | Delivers selected 3.3V or 2.2V; requires 1.0µF ceramic capacitor to GND for stability. |
| VSET/FB (Pin 4) | Voltage select input | Drives low (≤0.4V) for 3.3V output; high (≥1.2V) for 2.2V output; no FB function (fixed version). |
| IN (Pin 1) | Input supply | Accepts 2.2V–5.5V; requires 1.0µF ceramic bypass capacitor to GND near pin. |
| GND (Pin 2) | Power ground | Reference for all internal circuits; must be low-impedance connection to system ground plane. |
| EN (Pin 3) | Enable control | CMOS-compatible: ≥1.2V enables regulator; ≤0.4V disables with 18nA shutdown current. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-level output voltage selection | VSET pin toggles between factory-programmed 3.3V (HIGH) and 2.2V (LOW) - enables dynamic voltage scaling for MSP430 LPM3/Sleep mode. |
| Ultralow quiescent current | 1µA typical - preserves battery energy during extended idle periods in smoke detectors and wearable sensors. |
| Fast VOUT transition | 800µs high-to-low and low-to-high switching - meets MSP430 wake-up timing without external sequencing circuitry. |
| Thermal shutdown & current limit | +160°C trip / +140°C reset and 150–400mA current limit - protects device during short-circuit or overload conditions. |
| CMOS logic-level EN and VSET | No external level shifters needed - direct interface with MSP430 GPIO pins simplifies design and reduces component count. |
Applications
| Smartphone Power Management | Wireless Sensor Node |
|---|---|
Use Scenario: Dual-rail power for application processor active/sleep states in compact handheld devices. IC Role / Device Role / Timing Role: LDO providing 3.3V for RF transceiver during transmit and 2.2V for baseband MCU during idle. Use Value: Reduces average system power by 38% versus fixed 3.3V rail, extending talk time without increasing battery size. | Use Scenario: Battery-powered environmental sensor transmitting data every 5 minutes via BLE. IC Role / Device Role / Timing Role: Supplies 2.2V to MCU and sensor during 99.8% sleep duration; switches to 3.3V only during measurement and radio burst. Use Value: Enables 5-year CR2032 battery life by limiting high-current 3.3V operation to <0.2% of total runtime. |
| Smoke Detector MCU Supply | MSP430-Based Data Logger |
Use Scenario: Primary power source for UL-certified photoelectric smoke alarm with 10-year lithium battery. IC Role / Device Role / Timing Role: Delivers 2.2V to MSP430 during continuous analog sensing; pulses to 3.3V for self-test and alarm drive. Use Value: Meets IEC 60335 standby current limits (<10µA) while supporting full functionality during alarm events. | Use Scenario: Industrial temperature/humidity logger sampling hourly and storing data to FRAM. IC Role / Device Role / Timing Role: Powers MSP430 core at 2.2V for low-power ADC acquisition and FRAM write; elevates to 3.3V only for USB-CDC enumeration. Use Value: Eliminates need for discrete enable switch and second LDO, reducing bill-of-materials by two components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-level LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS781330220DRV | Same electrical specs; 2mm × 2mm SON-6 package with thermal pad - 65°C/W RθJA vs 200°C/W for DDCT. | Better thermal performance for sustained 150mA loads; requires PCB thermal relief and solder paste stencil adjustment. | Select DRV for higher ambient temperature environments (>60°C) or continuous high-current operation. |
| TPS780330220DDCR | 500nA IQ (vs 1µA), same dual-voltage outputs, but slower 2ms VOUT transition time and 2.5V minimum VIN. | Superior battery life in ultra-long-life applications; unsuitable for fast-wake MSP430 use cases requiring sub-1ms response. | Select TPS780 when system wake latency >2ms is acceptable and 10+ year battery life is mandatory. |
Compared with TPS781330220DRV and TPS780330220DDCR, the TPS781330220DDCT balances fast dynamic voltage scaling, industry-standard TSOT23-5 footprint, and proven 1µA IQ performance - making it optimal for cost-sensitive, space-constrained MSP430 designs requiring responsive power-state transitions.
Availability
TPS781330220DDCT is available at Aetrix Electronics and suitable for smartphone power management, wireless sensor nodes, smoke detector MCU supply, and MSP430-based data loggers requiring stable component supply across multi-year production cycles.
Supply support for TPS781330220DDCT 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 low-power design and precision analog ICs.
The TPS781 series was engineered specifically for battery-powered systems needing dynamic voltage scaling - targeting MSP430 microcontrollers, memory cards, and safety-critical portable electronics where ultralow IQ and dual-rail flexibility are essential.
FAQ
What are the factory-programmed output voltages for TPS781330220DDCT?
The TPS781330220DDCT is factory-programmed for dual-level output: 3.3V when VSET ≤0.4V (LOW state), and 2.2V when VSET ≥1.2V (HIGH state). These values are permanently set using TI's EPROM architecture and cannot be altered post-manufacture. The "330220" in the part number explicitly encodes VOUT(HIGH)=3.3V and VOUT(LOW)=2.2V.
Can TPS781330220DDCT operate with input voltage below 2.2V?
No. The absolute minimum input voltage for TPS781330220DDCT is 2.2V per the Absolute Maximum Ratings table. Operation below this threshold risks improper regulation or undefined behavior. When regulating 2.2V output, the minimum functional VIN is 2.4V (2.2V + 200mV dropout), ensuring stable operation across temperature and load.
Is an external resistor divider required for TPS781330220DDCT?
No. TPS781330220DDCT is a fixed dual-output variant - not the adjustable TPS78101. It has no FB pin functionality; Pin 4 is VSET only. Resistor dividers apply exclusively to the TPS78101 adjustable version. Using external resistors with TPS781330220DDCT provides no benefit and may interfere with VSET logic thresholds.
What is the maximum recommended output capacitance for TPS781330220DDCT?
The datasheet specifies stability with ≥1.0µF ceramic output capacitance and does not define a maximum value. However, larger capacitors (e.g., 10µF–22µF) are commonly used to improve transient response without compromising stability. Avoid electrolytic or high-ESR capacitors, as they degrade PSRR and may cause oscillation. X5R/X7R dielectrics are preferred.
Does TPS781330220DDCT support simultaneous enable and VSET control?
Yes. EN and VSET are fully independent control inputs. EN determines regulator ON/OFF state (1.2V/0.4V thresholds), while VSET selects between 3.3V and 2.2V outputs - both functions operate concurrently. For example, pulling EN low disables regulation regardless of VSET state; pulling EN high activates regulation at the voltage determined by VSET voltage level.
TPS781330220DDCT 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
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V, 2.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 150mA, -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 1.3 µA
- Current - Supply (Max):
- 8 µA
- PSRR:
- 40dB ~ 15dB (10Hz ~ 1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS781330220DDCT FAQ
1.How can I place an order for TPS781330220DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS781330220DDCT 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 TPS781330220DDCT reliable?
The price and inventory of TPS781330220DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS781330220DDCT is usually 5 days.
3.What payment methods are accepted for TPS781330220DDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS781330220DDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS781330220DDCT?
TPS781330220DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS781330220DDCT 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 TPS781330220DDCT?
For technical support, including TPS781330220DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS781330220DDCT requirements.
6.How does Aetrix verify that TPS781330220DDCT is sourced from the original manufacturer or authorized distributors?
All TPS781330220DDCT 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 TPS781330220DDCT meets industry standards.
7.What is the process for return or replacement of TPS781330220DDCT?
All TPS781330220DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS781330220DDCT, 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 TPS781330220DDCT part is unused and in its original packaging.
Return procedure for TPS781330220DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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