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Texas Instruments REG710NA-5/250
- Part No.:
- REG710NA-5/250
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
REG710NA-5/250.pdf
- Description:
- IC REG CHRG PUMP 5V 30MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:921
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Product details
Overview
REG710NA-5/250 from Texas Instruments is a fixed 5-V, 60-mA buck-boost switched-capacitor voltage regulator in SOT-23-6 package. It operates across 1.8 V to 5.5 V input, automatically switching between step-up and step-down modes to maintain regulation when VIN varies above or below VOUT. Designed for low-EMI, inductorless power conversion, it delivers 5 V ±3% at 30 mA with 35 mVPP ripple and 90% efficiency at light load - ideal for SIM card power rails in portable devices.
For engineers reviewing the REG710NA-5/250 datasheet, REG710NA-5/250 pinout, REG710NA-5/250 application, or REG710NA-5/250 equivalent, key selection criteria include input voltage range compatibility (1.8–5.5 V), 5-V fixed output tolerance (±3%), shutdown current (<1 μA), thermal protection (160°C trip), and minimal external component count (3 ceramic capacitors only).
Technical Context
The REG710NA-5/250 implements automatic mode switching: when VIN ≥ 3 V, it operates in step-down (buck) mode using Q4-on/Q2-switched topology; when VIN < 3 V, it switches to step-up (boost) mode with 50% duty-cycle clock driving CPUMP charge/discharge cycles. Internal 1-MHz oscillator enables use of 0.22 μF flying capacitor and 2.2 μF input/output ceramics.
Regulation is achieved via cycle-skipping control - not PWM or PFM modulation - maintaining stable 5-V output across load (0–30 mA) and input (2.7–5.5 V) variations. Protection includes thermal shutdown (160°C trip / 140°C recovery) and current limiting (100 mA short-circuit peak), with quiescent current held to 65 μA typical and 1 μA in shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±3% (4.7–5.3 V over 10–30 mA, 2.7–5.5 V VIN) |
| Max Output Current | 30 mA continuous (60 mA peak, derated per thermal limits) |
| Input Voltage Range | 1.8 V to 5.5 V; minimum startup at 2.7 V for 5-V version |
| Efficiency | Up to 90% at 10 mA / VIN = 2.7 V; drops to ~60% at 30 mA / VIN = 3.3 V |
| Output Ripple | 35 mVPP max at 30 mA, 25°C, with 2.2 μF X7R COUT |
| Quiescent Current | 65 μA typical operating; 0.01 μA typical in shutdown mode |
| Thermal Shutdown | Triggers at 160°C junction; auto-recovers at 140°C |
Pinout & Package
SOT-23-6 package (2.90 mm × 1.60 mm body, 0.95 mm height), thermally enhanced with exposed pad (not electrically connected). Pin 1 = VOUT, Pin 2 = GND, Pin 3 = Enable, Pin 4 = Cpump−, Pin 5 = VIN, Pin 6 = Cpump+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output supply | Delivers fixed 5-V rail; requires 2.2 μF ceramic capacitor to ground for stability and ripple suppression |
| GND (Pin 2) | Power ground reference | Common return for input, output, pump, and control circuits; must be low-impedance connection to minimize noise coupling |
| Enable (Pin 3) | Active-high digital enable | Logic high (≥1.3 V) enables regulation; logic low (<0.4 V) disables output and reduces IQ to <1 μA |
| Cpump− (Pin 4) | Flying capacitor negative terminal | Connects to one side of 0.22 μF ceramic flying capacitor; forms charge-transfer path during boost/buck cycles |
| VIN (Pin 5) | Unregulated input supply | Accepts 1.8–5.5 V source; requires 2.2 μF ceramic decoupling capacitor placed adjacent to this pin |
| Cpump+ (Pin 6) | Flying capacitor positive terminal | Connects to other side of 0.22 μF flying capacitor; alternately charges from VIN and discharges into VOUT path |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck-boost operation | Eliminates need for separate step-up/step-down ICs or manual mode selection in battery-powered systems with varying cell voltage |
| No inductor required | Reduces EMI, board area, and BOM cost by using ceramic flying and bulk capacitors instead of magnetics |
| 1-MHz internal oscillator | Enables use of small 0.22 μF flying capacitor and 2.2 μF input/output ceramics - no large tantalums or electrolytics needed |
| Low shutdown current | 0.01 μA typical allows >10-year shelf life in always-on backup or smart-card applications with infrequent wake-up |
| Integrated thermal & current protection | Prevents damage during sustained overload or poor PCB thermal design without requiring external circuitry |
Applications
| Smart Card Power Supply | SIM Card Interface Rail |
|---|---|
Use Scenario: Powers ISO 7816-compliant smart cards in point-of-sale terminals or secure authentication modules where input is single-cell Li-ion (3.0–4.2 V) or alkaline (1.8–3.0 V). IC Role / Device Role / Timing Role: Provides regulated 5-V supply independent of battery state; handles input dips below 5 V via boost mode and surges above 5 V via buck mode. Use Value: Enables reliable card communication across full battery discharge curve without external LDO or DC-DC staging. | Use Scenario: Supplies 5-V interface voltage to 3G/4G SIM cards in mobile handsets or IoT modems powered by 3.3-V system rails or partially discharged batteries. IC Role / Device Role / Timing Role: Acts as isolated 5-V generator from lower-voltage sources; supports hot-swap insertion with controlled soft-start behavior. Use Value: Eliminates need for dedicated 5-V buck converter or charge pump IC in space-constrained SIM socket designs. |
| White LED Bias for LCD Backlight | Battery Backup Voltage Booster |
Use Scenario: Drives 1–2串联 white LEDs (VF ≈ 3.0–3.6 V) in handheld medical or industrial displays powered by 3.0-V coin cells or 2×AA alkalines. IC Role / Device Role / Timing Role: Functions as constant-voltage source delivering up to 30 mA at 5 V; regulates despite input sag under load due to battery ESR. Use Value: Achieves consistent LED brightness across battery life without PWM dimming complexity or inductor-based boosters. | Use Scenario: Generates stable 5-V rail from aging 3.0-V backup supercapacitor or lithium-thionyl chloride cell in real-time clock or SRAM retention circuits. IC Role / Device Role / Timing Role: Maintains regulation down to 1.8-V input, enabling extended hold-up time beyond primary power failure. Use Value: Extends functional backup duration by 2–3× compared to diode-OR + LDO solutions with higher dropout. |
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 |
|---|---|---|---|
| MAX680ESA+ | Fixed 5-V output, ±1.5% accuracy, 100-mA max, 1.5-MHz oscillator, SO-8 package | Higher output current and tighter regulation but requires larger footprint and two flying caps | Choose MAX680ESA+ when >30 mA load or <2% VOUT tolerance is required; avoid if board space is constrained. |
| TPS60403DBVR | Fixed 5-V output, ±4% accuracy, 60-mA max, 1-MHz oscillator, SOT-23-6 package, integrated soft-start | Similar pinout and external component count but lacks thermal shutdown and has higher 120-μA IQ | Choose TPS60403DBVR for cost-sensitive designs where thermal robustness is secondary and soft-start is preferred. |
Compared with MAX680ESA+ and TPS60403DBVR, REG710NA-5/250 offers superior thermal protection and lower quiescent current (65 μA vs 120 μA), making it optimal for battery-critical applications - though its ±3% output tolerance and lack of soft-start require careful system-level validation.
Availability
REG710NA-5/250 is available at Aetrix Electronics and suitable for smart card readers, SIM interface circuits, white LED biasing, and battery backup supplies requiring stable component supply with guaranteed long-term sourcing.
Supply support for REG710NA-5/250 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 power management ICs for portable and industrial applications.
The REG710 family was designed specifically for ultra-compact, inductorless DC-DC conversion in space-constrained battery-powered systems - targeting SIM/smart card interfaces, LCD backlighting, and backup power where EMI and component count are critical.
FAQ
What is the minimum input voltage required for REG710NA-5/250 to start regulation?
The REG710NA-5/250 requires a minimum input voltage of 2.7 V to initiate regulation, as specified in the Recommended Operating Conditions table. Below this threshold, the device cannot sustain 5-V output even in boost mode. This startup requirement ensures sufficient headroom for internal charge pump operation and gate drive margins. The REG710NA-5/250 remains functional down to 1.8 V once started, but will drop out if VIN falls below 2.7 V during operation.
Does REG710NA-5/250 support true shutdown with output isolation?
Yes, REG710NA-5/250 provides true shutdown: when the Enable pin is pulled low (<0.4 V), the output is actively disconnected from both input and flying capacitor paths, reducing quiescent current to 0.01 μA typical and eliminating reverse current flow. This isolation prevents VOUT from back-driving VIN or leaking into the pump network. The REG710NA-5/250 does not require external blocking diodes for shutdown integrity.
Can REG710NA-5/250 drive multiple white LEDs in series?
No - REG710NA-5/250 is a fixed-voltage regulator, not a constant-current LED driver. It can power 1–2 white LEDs in parallel (total IF ≤30 mA) with appropriate current-limiting resistors, but cannot regulate current directly. For series-connected LEDs requiring >3.6 V VF, the 5-V output provides insufficient headroom. Use REG710NA-5/250 only for parallel LED configurations or as a bias rail for external LED driver ICs.
What ceramic capacitor dielectric is recommended for REG710NA-5/250 external components?
X7R or X5R dielectrics are explicitly recommended for CIN, COUT, and CPUMP in the REG710NA-5/250 datasheet. These offer stable capacitance over temperature and voltage, low ESR (<0.1 Ω), and minimal microphonic effects. Avoid Y5V or Z5U types due to severe capacitance loss at bias and temperature extremes, which would increase output ripple and risk instability. The REG710NA-5/250's performance specifications assume X7R/X5R ceramics.
Is REG710NA-5/250 RoHS compliant and lead-free?
Yes, REG710NA-5/250 is RoHS compliant and features lead-free terminations with NiPdAu (NIPDAU) plating, as confirmed in TI's Packaging Information addendum. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) with unlimited floor life at ≤30°C/85% RH, and is rated for reflow peak temperatures up to 260°C. The REG710NA-5/250 is qualified for industrial temperature range (–40°C to +85°C) and carries TI's standard 2-year warranty.
REG710NA-5/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 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-5/250 FAQ
1.How can I place an order for REG710NA-5/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG710NA-5/250 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-5/250 reliable?
The price and inventory of REG710NA-5/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG710NA-5/250 is usually 5 days.
3.What payment methods are accepted for REG710NA-5/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG710NA-5/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG710NA-5/250?
REG710NA-5/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG710NA-5/250 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-5/250?
For technical support, including REG710NA-5/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG710NA-5/250 requirements.
6.How does Aetrix verify that REG710NA-5/250 is sourced from the original manufacturer or authorized distributors?
All REG710NA-5/250 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-5/250 meets industry standards.
7.What is the process for return or replacement of REG710NA-5/250?
All REG710NA-5/250 units undergo pre-shipment inspection (PSI). If there is an issue with REG710NA-5/250, 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-5/250 part is unused and in its original packaging.
Return procedure for REG710NA-5/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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