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Texas Instruments REG71050DDCTG4
- Part No.:
- REG71050DDCTG4
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
REG71050DDCTG4.pdf
- Description:
- IC REG CHARGE PUMP 5V 60MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,264
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Product details
Overview
REG71050DDCTG4 from Texas Instruments is a fixed 5-V output buck-boost switched-capacitor voltage converter supporting 1.8 V to 5.5 V input, delivering up to 30 mA regulated output with 35 mVPP ripple at 30 mA and 90% peak efficiency. It operates autonomously in step-up or step-down mode without inductors and serves as a compact power source for low-current portable logic rails.
For engineers reviewing the REG71050DDCTG4 datasheet, REG71050DDCTG4 pinout, REG71050DDCTG4 application, or REG71050DDCTG4 equivalent, key selection criteria include input voltage flexibility (1.8–5.5 V), inductorless charge-pump topology, thermal/current protection, shutdown current <1 μA, and SON-6 package compatibility with space-constrained battery-powered designs.
Technical Context
The REG71050DDCTG4 uses a 1-MHz internal oscillator to drive a four-FET switched-capacitor topology that automatically selects between buck (VIN > VOUT) and boost (VIN < VOUT) operation based on real-time input voltage relative to its fixed 5-V output. No external mode control is required.
It integrates thermal shutdown (160°C trip, 140°C recovery) and current limiting, while maintaining 65 μA quiescent current in active mode and reducing to 0.01 μA in shutdown-enabling ultra-low-power retention in handheld and SIM-card applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±3%, stable across 1.8–5.5 V input and 0–30 mA load. |
| Input Voltage Range | 1.8 V to 5.5 V-supports single-cell Li-ion, 2–3 cell alkaline/Ni-based batteries without pre-regulation. |
| Max Output Current | 30 mA continuous-sufficient for low-power logic, SIM cards, and LED biasing. |
| Output Ripple | 35 mVPP at 30 mA-achieved with 2.2 μF ceramic COUT and 0.22 μF CPUMP, enabling clean digital rail generation. |
| Quiescent Current | 65 μA typical-minimizes battery drain in always-on subsystems like smart card readers. |
| Shutdown Current | 0.01 μA typical-enables multi-year shelf life in battery-backed modules. |
| Switching Frequency | 1 MHz-permits use of small 0402/0603 ceramic capacitors, reducing PCB area vs. inductor-based solutions. |
Pinout & Package
REG71050DDCTG4 is housed in a 2.0 mm × 2.0 mm SON-6 package with exposed thermal pad for enhanced power dissipation in high-ambient environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply | Accepts 1.8–5.5 V unregulated source; connects to 2.2 μF input capacitor for peak current handling. |
| VOUT | Regulated output | Delivers fixed 5.0 V; connects directly to load and 2.2 μF output capacitor to suppress ripple. |
| GND | Ground reference | Common return path for input, output, and pump circuits; must be tied to thermal pad for thermal performance. |
| Enable | Control input | Active-high logic signal (1.3–VIN V); pulls low to reduce supply current to 0.01 μA and disconnect output. |
| Cpump+ | Flying capacitor terminal | Connects to positive side of 0.22 μF flying capacitor; alternates polarity during charge/discharge cycles. |
| Cpump− | Flying capacitor terminal | Connects to negative side of 0.22 μF flying capacitor; completes charge-pump switching loop with Cpump+. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck-boost mode switching | Seamlessly transitions between step-up and step-down operation without external control or mode pins. |
| No inductor required | Eliminates magnetic components, EMI filters, and layout sensitivity-reducing BOM cost and board area by >30% vs. inductive DC-DC. |
| Low input current ripple | Peak input current limited internally, easing requirements on input source impedance and battery pulsing behavior. |
| Thermal and current protection | Shuts down at 160°C junction temperature and limits short-circuit current to ~100 mA, preventing damage during fault conditions. |
| 1-MHz oscillator with small caps | Enables use of 0.22 μF flying and 2.2 μF input/output ceramics-compatible with 0402/0603 footprints and high-density layouts. |
Applications
| Smart Card Readers | SIM Card Power Supply |
|---|---|
Use Scenario: Powering ISO/IEC 7816-compliant contact smart cards in point-of-sale terminals and secure authentication devices. IC Role / Device Role / Timing Role: Provides stable 5-V supply to card interface circuitry independent of host battery voltage (1.8–4.2 V). Use Value: Eliminates need for separate LDO or inductor-based regulator, reducing solution size and enabling direct integration into compact reader modules. | Use Scenario: Delivering regulated 5-V power to GSM/UMTS/LTE SIM cards operating across wide battery voltage ranges (3.0–4.2 V nominal). IC Role / Device Role / Timing Role: Acts as a dedicated SIM supply rail generator with fast enable/disable response for hot-plug detection and power sequencing. Use Value: Maintains <1 μA shutdown current to preserve battery life during idle periods while ensuring rapid wake-up and regulation stability. |
| Handheld Device Logic Rails | White LED Biasing |
Use Scenario: Generating auxiliary 5-V logic supply for microcontroller peripherals, sensors, or display drivers in battery-powered handheld instruments. IC Role / Device Role / Timing Role: Supplies clean, low-noise 5-V rail to noise-sensitive analog/digital interfaces without inductor coupling. Use Value: Achieves 35 mVPP ripple at full 30 mA load-meeting noise budgets for ADC references and RF front-end biasing. | Use Scenario: Driving 1–3 white LEDs in portable medical testers, barcode scanners, or diagnostic tools requiring constant-current bias. IC Role / Device Role / Timing Role: Serves as a compact, efficient voltage source feeding external LED driver ICs or resistor-limited strings. Use Value: Supports up to 60 mA total LED current when paralleled (per datasheet Figure 22), enabling scalable illumination without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REG71050DDCR | Same electrical specs and SON-6 package; differs only in tape-and-reel quantity (3000 vs. 250) and part marking (GAAI vs. GAAI). | No functional difference; identical thermal, electrical, and mechanical behavior in circuit. | Select REG71050DDCR for high-volume production; REG71050DDCTG4 suits prototyping and low-quantity builds. |
| TPS60403DBVR | Fixed 5-V output, but rated for 60 mA max and uses different charge-pump architecture with higher quiescent current (120 μA). | Better suited for higher-current loads; less optimal for ultra-low-power shutdown scenarios due to higher ISD. | Choose TPS60403DBVR only if >30 mA sustained output is required; otherwise REG71050DDCTG4 offers superior IQ and smaller footprint. |
Compared with REG71050DDCR, REG71050DDCTG4 offers identical performance in a smaller reel format ideal for evaluation; versus TPS60403DBVR, it delivers lower quiescent current and tighter output regulation at light loads-critical for battery longevity in intermittent-use devices.
Availability
REG71050DDCTG4 is available at Aetrix Electronics and suitable for smart card readers, SIM card power supplies, and handheld device logic rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for REG71050DDCTG4 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 over 50 years of innovation in energy-efficient IC design.
The REG710 product line was engineered specifically for ultra-compact, inductorless DC-DC conversion in space- and power-constrained portable electronics-targeting battery-powered communication, identification, and instrumentation systems.
FAQ
What is the maximum continuous output current of the REG71050DDCTG4?
The REG71050DDCTG4 delivers up to 30 mA continuous output current under recommended operating conditions (TA = –40°C to 85°C, VIN ≥ 3 V). At higher input voltages (e.g., VIN = 3.3–4.2 V), it supports up to 60 mA in pulsed operation per the datasheet's efficiency curves and electrical characteristics table. Exceeding 30 mA continuously may trigger thermal shutdown depending on ambient and PCB layout.
Does the REG71050DDCTG4 require external diodes or inductors?
No, the REG71050DDCTG4 is a fully integrated switched-capacitor voltage converter and requires no external diodes or inductors. Only three external ceramic capacitors are needed: 2.2 μF input (CIN), 2.2 μF output (COUT), and 0.22 μF flying capacitor (CPUMP). This eliminates magnetic components, reduces EMI, and simplifies layout compared to inductive DC-DC solutions.
How does the REG71050DDCTG4 handle input voltages both above and below 5 V?
The REG71050DDCTG4 automatically switches between buck (step-down) and boost (step-up) modes based on real-time VIN relative to its fixed 5-V output. When VIN > 5 V, it operates in buck mode using Q4 conduction and Q2 switching; when VIN < 5 V, it enters boost mode with alternating charge/discharge of CPUMP. No external mode control or configuration is required-the transition occurs seamlessly within the IC.
What is the shutdown current specification for the REG71050DDCTG4?
The REG71050DDCTG4 draws just 0.01 μA typical shutdown current when the Enable pin is pulled low and VIN is within the recommended operating range (≥1.8 V). This ultra-low ISD enables multi-year battery life in standby applications such as SIM card modules and secure authentication tokens where power budget is critical.
Can the REG71050DDCTG4 be used in parallel to increase output current?
Yes, the REG71050DDCTG4 supports parallel operation to double output current capacity. As documented in the datasheet's Figure 22, two synchronized REG71050DDCTG4 units can deliver up to 60 mA at 5 V when supplied from 2.2–5.5 V input. Both Enable pins must be tied together, and individual CIN/COUT/CPUMP networks should be maintained to ensure balanced loading and stability.
REG71050DDCTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 60mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
REG71050DDCTG4 FAQ
1.How can I place an order for REG71050DDCTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG71050DDCTG4 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 REG71050DDCTG4 reliable?
The price and inventory of REG71050DDCTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG71050DDCTG4 is usually 5 days.
3.What payment methods are accepted for REG71050DDCTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG71050DDCTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG71050DDCTG4?
REG71050DDCTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG71050DDCTG4 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 REG71050DDCTG4?
For technical support, including REG71050DDCTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG71050DDCTG4 requirements.
6.How does Aetrix verify that REG71050DDCTG4 is sourced from the original manufacturer or authorized distributors?
All REG71050DDCTG4 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 REG71050DDCTG4 meets industry standards.
7.What is the process for return or replacement of REG71050DDCTG4?
All REG71050DDCTG4 units undergo pre-shipment inspection (PSI). If there is an issue with REG71050DDCTG4, 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 REG71050DDCTG4 part is unused and in its original packaging.
Return procedure for REG71050DDCTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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