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Texas Instruments REG710NA-2.5/3K
- Part No.:
- REG710NA-2.5/3K
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
REG710NA-2.5/3K.pdf
- Description:
- IC REG CHARGE PUMP 2.5V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,470
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Product details
Overview
REG710NA-2.5/3K from Texas Instruments is a fixed-output 2.5 V switched-capacitor buck-boost charge pump IC delivering up to 30 mA output current with 90% peak efficiency, 35 mVPP output ripple, and operation across 1.8 V–5.5 V input range. It enables regulated power in space-constrained battery-powered systems where input voltage may fall below or rise above the output rail-e.g., powering 2.5 V logic from a single Li-ion cell.
For engineers reviewing the REG710NA-2.5/3K datasheet, REG710NA-2.5/3K pinout, REG710NA-2.5/3K application, or REG710NA-2.5/3K equivalent, key selection criteria include input voltage crossover behavior (mode switch at VIN > 3.2 V), shutdown current < 1 μA, thermal shutdown at 160°C, and compatibility with 0.22 μF flying capacitor and 2.2 μF input/output ceramics.
Technical Context
The REG710NA-2.5/3K operates autonomously between step-up (boost) and step-down (buck) modes based on real-time VIN vs. VOUT comparison, switching at 1 MHz without external inductors. Its internal FET array (Q1–Q4) reconfigures CPUMP charge/discharge paths to maintain regulation across varying load and input conditions.
Control logic includes active-high Enable pin with 1.3 V logic-high threshold, integrated current limiting (100 mA short-circuit current), and thermal protection that disables output at 160°C and recovers at 140°C. Quiescent current is 65 μA typical under load and drops to 0.01 μA in shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±4% (2.35–2.65 V over temperature and load) |
| Input Voltage Range | 1.8 V to 5.5 V - supports single-cell Li-ion, 2–3 alkaline/NiMH, and wide-battery aging margins |
| Max Output Current | 30 mA continuous - sufficient for low-power logic, SIM cards, and sensor interfaces |
| Peak Efficiency | 90% at IOUT = 10 mA, VIN = 1.8 V - minimizes battery drain in ultra-low-power applications |
| Output Ripple | 35 mVPP at 30 mA - meets noise-sensitive analog and RF supply requirements with standard 2.2 μF ceramic caps |
| Switching Frequency | 1 MHz - enables use of small 0.22 μF flying capacitor and reduces EMI compared to lower-frequency charge pumps |
| Shutdown Current | 0.01 μA typical - preserves battery life during system sleep modes |
Pinout & Package
SOT-23-6 package (2.90 mm × 1.60 mm body size) with exposed thermal pad for enhanced power dissipation in compact layouts.
| 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 stable 2.5 V; connects to 2.2 μF output capacitor to suppress ripple and transient response |
| GND | Ground reference | Common return path for input, output, and flying capacitor circuits; must be low-impedance |
| Enable | Hardware control input | Active-high logic signal (1.3 V min); pulls low to reduce quiescent current to 0.01 μA |
| Cpump+ | Flying capacitor terminal (+) | Connects to one side of 0.22 μF flying capacitor; switches polarity during boost/buck cycles |
| Cpump− | Flying capacitor terminal (−) | Connects to other side of 0.22 μF flying capacitor; completes charge-transfer path with Cpump+ |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck-boost mode switching | Seamlessly transitions between step-up and step-down operation at VIN ≈ 3.2 V-no external control required |
| No-inductor DC-DC conversion | Eliminates magnetic components and associated EMI, simplifying layout and reducing BOM cost |
| Low input current ripple | Peak input current limited internally-reduces stress on battery and input capacitors |
| Thermal and current protection | Shuts down at 160°C junction temperature and limits output current to 100 mA-prevents damage during fault conditions |
| Minimal external components | Requires only three 0603/0805 ceramic capacitors (CIN, COUT, CPUMP)-no resistors, diodes, or inductors |
Applications
| White LED Driver | Smart Card Reader |
|---|---|
Use Scenario: Powering 2.5 V white LEDs from a 1.8–3.6 V lithium coin cell or alkaline stack in portable readers. IC Role / Device Role / Timing Role: Regulated voltage source enabling constant-current LED bias without inductor-based boost converters. Use Value: Delivers 30 mA at 90% efficiency with 35 mVPP ripple-ensuring stable brightness and minimal battery drain over full discharge curve. |
Use Scenario: Supplying 2.5 V VCC to ISO/IEC 7816-compliant smart card interface circuitry in handheld POS terminals. IC Role / Device Role / Timing Role: Primary regulated supply for card controller ICs requiring tight voltage tolerance and fast transient response. Use Value: Maintains regulation even as battery voltage drops from 3.6 V to 1.8 V-enabling reliable card insertion/detection across full battery life. |
| LCD Display Bias | Battery Backup Supply |
Use Scenario: Generating 2.5 V bias for segment LCD drivers in medical wearables powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Low-noise, low-quiescent power source for display driver ICs sensitive to supply ripple. Use Value: 65 μA operating IQ and 0.01 μA shutdown current extend coin-cell lifetime beyond 5 years in always-on displays. |
Use Scenario: Providing clean 2.5 V backup rail for real-time clocks (RTCs) and SRAM retention during main power failure in industrial controllers. IC Role / Device Role / Timing Role: Fail-safe voltage regulator maintaining critical memory and timekeeping functions during brownout events. Use Value: Operates down to 1.8 V input-enables RTC hold-up from depleted backup batteries without external supervision circuitry. |
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 |
|---|---|---|---|
| TPS60230RGTR | 2.5 V fixed output, 60 mA max, 1.2 MHz switching, requires 1 μF flying cap | Higher output current but larger 3 mm × 3 mm QFN package and higher 120 μA IQ | Choose when >30 mA load or tighter output accuracy (±2%) is required; verify PCB area and thermal budget |
| MAX680ESA+ | 2.5 V fixed output, 25 mA max, 10 kHz oscillator, dual charge-pump topology | Lower efficiency (~75%), higher ripple (>100 mVPP), no thermal shutdown | Consider only for legacy designs with existing MAX680 footprint; not recommended for new designs due to performance gap |
Compared with TPS60230RGTR and MAX680ESA+, the REG710NA-2.5/3K offers optimal balance of ultra-low quiescent current (65 μA), compact SOT-23-6 footprint, and robust protection-making it ideal for battery longevity and space-constrained applications where 30 mA suffices.
Availability
REG710NA-2.5/3K is available at Aetrix Electronics and suitable for white LED drivers, smart card readers, LCD bias supplies, battery backup systems, and handheld device power rails requiring stable component supply and long-term manufacturability.
Supply support for REG710NA-2.5/3K 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 high-reliability power solutions.
The REG710 family was designed specifically for ultra-low-power, inductorless voltage regulation in portable and battery-operated systems-targeting applications where board space, EMI, and standby current are critical constraints.
FAQ
What is the minimum input voltage required for REG710NA-2.5/3K to start up and regulate?
The REG710NA-2.5/3K has a tested startup voltage of 1.8 V across its full operating temperature range. At this input level, it delivers regulated 2.5 V output with up to 10 mA load while maintaining stability and ripple within specification. Startup is guaranteed per TI's SBAS221H datasheet Section 7.3.
Does REG10NA-2.5/3K require external compensation components?
No, the REG710NA-2.5/3K is fully internally compensated. It operates stably with only three external ceramic capacitors: 2.2 μF input (CIN), 2.2 μF output (COUT), and 0.22 μF flying capacitor (CPUMP). No resistors, feedback dividers, or compensation networks are needed-simplifying design and reducing bill-of-materials count.
How does REG710NA-2.5/3K behave when input voltage crosses 2.5 V?
The REG710NA-2.5/3K automatically switches between buck and boost modes at approximately VIN = 3.2 V-not at 2.5 V. Below 3.2 V, it operates in boost mode to raise VIN to 2.5 V; above 3.2 V, it operates in buck mode to step down VIN. This hysteresis prevents oscillation near the crossover point and ensures smooth regulation.
Can REG710NA-2.5/3K drive multiple parallel loads totaling 40 mA?
No-REG710NA-2.5/3K is rated for 30 mA continuous output current per the datasheet's Electrical Characteristics table. Exceeding this risks thermal shutdown or output droop. For 40 mA, consider paralleling two REG710NA-2.5/3K devices (as shown in Figure 22 of SBAS221H) or selecting a higher-current alternative like TPS60230RGTR.
Is REG710NA-2.5/3K RoHS compliant and lead-free?
Yes, REG710NA-2.5/3K is RoHS compliant and features lead-free (NIPDAU) termination per TI's packaging addendum. It carries MSL Level-1 rating (260°C peak reflow, unlimited floor life) and is qualified for industrial temperature range (–40°C to +85°C).
REG710NA-2.5/3K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 30mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
REG710NA-2.5/3K FAQ
1.How can I place an order for REG710NA-2.5/3K through Aetrix?
Please submit a Request for Quotation (RFQ) for REG710NA-2.5/3K 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 REG710NA-2.5/3K reliable?
The price and inventory of REG710NA-2.5/3K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG710NA-2.5/3K is usually 5 days.
3.What payment methods are accepted for REG710NA-2.5/3K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG710NA-2.5/3K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG710NA-2.5/3K?
REG710NA-2.5/3K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG710NA-2.5/3K 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 REG710NA-2.5/3K?
For technical support, including REG710NA-2.5/3K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG710NA-2.5/3K requirements.
6.How does Aetrix verify that REG710NA-2.5/3K is sourced from the original manufacturer or authorized distributors?
All REG710NA-2.5/3K 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 REG710NA-2.5/3K meets industry standards.
7.What is the process for return or replacement of REG710NA-2.5/3K?
All REG710NA-2.5/3K units undergo pre-shipment inspection (PSI). If there is an issue with REG710NA-2.5/3K, 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 REG710NA-2.5/3K part is unused and in its original packaging.
Return procedure for REG710NA-2.5/3K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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