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Texas Instruments REG710NA-5/3K
- Part No.:
- REG710NA-5/3K
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
REG710NA-5/3K.pdf
- Description:
- IC REG CHRG PUMP 5V 30MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:13,564
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Product details
Overview
REG710NA-5/3K 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, delivers low-ripple output without inductors, and supports automatic step-up/step-down mode switching-ideal for powering SIM cards and smart card readers from single-cell Li-ion or alkaline batteries.
For engineers reviewing the REG710NA-5/3K datasheet, REG710NA-5/3K pinout, REG710NA-5/3K application, or REG710NA-5/3K equivalent, key selection criteria include input voltage range (1.8–5.5 V), regulated 5-V output tolerance (±6%), shutdown current (<1 μA), thermal protection (160°C trip), and compatibility with 0.22 μF flying capacitor and 2.2 μF input/output ceramics.
Technical Context
The REG710NA-5/3K uses a 1-MHz internal oscillator to drive charge-pump FETs (Q1–Q4) in either buck or boost configuration depending on VIN relative to VOUT. When VIN ≥ 2.7 V, it regulates 5 V output with ±6% accuracy over load (0–30 mA) and temperature (–40°C to 85°C); below 2.7 V, it enters boost-only mode to maintain regulation.
Its control architecture includes cycle-skipping for regulation, peak current limiting to reduce EMI, and integrated thermal shutdown (160°C trip / 140°C recovery) plus current limit protection. Quiescent current is 65 μA typical, dropping to 0.01 μA in shutdown-enabled via logic-level EN pin with 1.3 V VIH threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5 V ±6% - stable regulation across input 2.7–5.5 V and load 0–30 mA |
| Max Output Current | 30 mA continuous - sufficient for SIM card power rails and low-power LCD bias |
| Input Voltage Range | 1.8 V to 5.5 V - supports single-cell Li-ion (2.7–4.2 V), NiMH (2.4–3.6 V), and 2–3 alkaline cells |
| Quiescent Current | 65 μA typical - enables >1-year battery life in always-on smart card applications |
| Shutdown Current | 0.01 μA typical - reduces standby drain to negligible levels during host sleep |
| Oscillator Frequency | 1 MHz - allows use of small 0.22 μF flying capacitor and 2.2 μF ceramic input/output caps |
| Thermal Shutdown | 160°C trip - protects device during sustained overload or poor PCB thermal design |
Pinout & Package
SOT-23-6 package (2.90 mm × 1.60 mm body size) with exposed thermal pad; pinout validated per TI SBAS221H datasheet Figure 6 and Pin Functions table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 5) | Input supply | Accepts 1.8–5.5 V unregulated source; requires local 2.2 μF ceramic decoupling |
| VOUT (Pin 1) | Regulated output | Delivers fixed 5 V ±6%; connects to 2.2 μF ceramic output capacitor |
| GND (Pin 2) | Ground reference | Common return for input, output, and pump paths; ties to thermal pad |
| Enable (Pin 3) | Hardware enable | Active-high logic control (VIH = 1.3 V); pulls low for <1 μA shutdown |
| Cpump+ (Pin 6) | Flying capacitor positive | Connects to one terminal of 0.22 μF flying capacitor (CPUMP) |
| Cpump− (Pin 4) | Flying capacitor negative | Connects to other terminal of 0.22 μF flying capacitor; forms charge-transfer path |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor DC-DC conversion | Eliminates magnetic components and EMI filters-reduces BOM cost and board area by >30% vs. inductive buck-boost |
| Automatic buck/boost mode switching | Seamlessly transitions between step-down (VIN > VOUT) and step-up (VIN < VOUT) without external control |
| Low input current ripple | Peak input current limited internally-reduces stress on battery and input capacitors, easing compliance with portable EMI limits |
| Thermal + current protection | Integrated shutdown at 160°C and current limit prevent damage during short-circuit or thermal overload conditions |
| 6-pin SOT-23 footprint | Standardized, widely supported package compatible with automated assembly and reflow processes |
Applications
| Smart Card Readers | SIM Card Power Supply |
|---|---|
Use Scenario: Powering ISO/IEC 7816-compliant contact smart cards in point-of-sale terminals and access control readers. IC Role / Device Role / Timing Role: Provides stable 5-V rail from variable battery or USB input; handles transient load steps during card reset and command execution. Use Value: Enables reliable card communication across full battery discharge curve (2.7–4.2 V) without voltage droop or brownout. | Use Scenario: Supplying 5-V interface power to 3G/4G/LTE SIM modules in mobile handsets and IoT modems. IC Role / Device Role / Timing Role: Regulates SIM VCC rail independently of main system voltage; responds to host-controlled enable/disable signals. Use Value: Reduces standby current to <1 μA during SIM sleep, extending battery runtime in always-connected devices. |
| LCD Display Bias | Battery Backup Supply |
Use Scenario: Generating 5-V bias for segment or dot-matrix LCDs in handheld medical instruments and industrial HMIs. IC Role / Device Role / Timing Role: Supplies clean, low-noise 5-V output to LCD driver ICs; maintains regulation during backlight switching transients. Use Value: Achieves <35 mVPP output ripple with 2.2 μF ceramic caps-prevents visible flicker or ghosting on high-contrast displays. | Use Scenario: Providing regulated 5-V backup power to real-time clocks (RTCs) and SRAM during main supply failure. IC Role / Device Role / Timing Role: Acts as low-quiescent, always-on auxiliary regulator; starts up from 1.8 V to support deep-battery brownout scenarios. Use Value: Delivers 30 mA at 5 V from 2.2 V input-enables RTC operation down to near-dead battery voltage. |
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 5-V output, identical SOT-23-6 package, same electrical specs; differs only in tape-and-reel packaging (3000 pcs/reel vs. 3K). | No functional difference; suitable for high-volume automated assembly where reel count matches production batch size. | Select REG71050DDCR when sourcing full reels for SMT line optimization; REG710NA-5/3K is functionally identical but shipped in 3K quantity. |
| MAX680ESA+ | 5-V output, but fixed 100-mA rating, higher quiescent current (120 μA), no shutdown pin, SO-8 package. | Lacks enable control and thermal protection; requires larger board area and draws more battery current in active mode. | Choose MAX680ESA+ only if higher output current is mandatory and shutdown control is unnecessary; otherwise REG710NA-5/3K offers superior integration and efficiency. |
Compared with REG71050DDCR, REG710NA-5/3K shares identical regulation, protection, and pinout-but differs in packaging unit size; versus MAX680ESA+, REG710NA-5/3K adds enable control, thermal shutdown, lower IQ, and smaller footprint-making it preferable for battery-constrained, safety-aware designs.
Availability
REG710NA-5/3K is available at Aetrix Electronics and suitable for smart card readers, SIM card interfaces, LCD display bias circuits, and battery backup supplies requiring stable component supply with guaranteed long-term continuity.
Supply support for REG710NA-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 delivering analog and embedded processing solutions, with decades of expertise in power management ICs for portable and industrial applications.
The REG710 family was designed specifically for low-power, space-constrained systems needing regulated voltage from unstable or wide-range sources-targeting smart cards, SIM modules, and handheld peripherals where inductor-free conversion is critical.
FAQ
What is the minimum input voltage required for REG710NA-5/3K to start regulating 5 V output?
The REG710NA-5/3K requires a minimum input voltage of 2.7 V to initiate and maintain 5-V regulation, as specified in the Recommended Operating Conditions table of TI SBAS221H. Below 2.7 V, the device cannot sustain regulation and may drop out of specification; operation down to 1.8 V is supported only for versions with lower output voltages (e.g., REG710NA-2.5).
Does REG710NA-5/3K require external components beyond capacitors?
No, REG710NA-5/3K requires only three external ceramic capacitors: 2.2 μF input (CIN), 2.2 μF output (COUT), and 0.22 μF flying capacitor (CPUMP). No inductors, diodes, or resistors are needed-making it a true 3-component solution. The Enable pin can be tied high or controlled externally, but no pull-up resistor is mandatory if driven actively.
How does REG710NA-5/3K handle input voltage crossing the 5-V output level?
REG710NA-5/3K automatically switches between buck (step-down) and boost (step-up) modes based on VIN relative to VOUT. When VIN exceeds ~3.7 V, it operates in buck mode; when VIN falls below that threshold, it transitions to boost mode-all transparently, without external intervention or mode pins. This seamless transition ensures uninterrupted 5-V output across varying battery states.
What is the maximum continuous output current for REG710NA-5/3K at 5 V?
The REG710NA-5/3K delivers up to 30 mA continuously at 5 V output while maintaining regulation and thermal safety, per Electrical Characteristics in TI SBAS221H. At higher loads (up to 60 mA), regulation holds only within narrower input ranges (e.g., 3.3–4.2 V), and thermal derating applies above 85°C ambient. For sustained 60-mA operation, parallel REG710 devices are recommended.
Can REG710NA-5/3K be used in automotive applications?
REG710NA-5/3K is rated for –40°C to +85°C operating ambient temperature and includes thermal shutdown (160°C) and current limiting-meeting basic industrial requirements. However, it is not AEC-Q200 qualified, lacks automotive-grade qualification documentation, and has no specified performance under load dump or cold-crank conditions. Use in automotive infotainment or telematics is possible only after full system-level validation and derating.
REG710NA-5/3K 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-5/3K FAQ
1.How can I place an order for REG710NA-5/3K through Aetrix?
Please submit a Request for Quotation (RFQ) for REG710NA-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-5/3K reliable?
The price and inventory of REG710NA-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-5/3K is usually 5 days.
3.What payment methods are accepted for REG710NA-5/3K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG710NA-5/3K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG710NA-5/3K?
REG710NA-5/3K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG710NA-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-5/3K?
For technical support, including REG710NA-5/3K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG710NA-5/3K requirements.
6.How does Aetrix verify that REG710NA-5/3K is sourced from the original manufacturer or authorized distributors?
All REG710NA-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-5/3K meets industry standards.
7.What is the process for return or replacement of REG710NA-5/3K?
All REG710NA-5/3K units undergo pre-shipment inspection (PSI). If there is an issue with REG710NA-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-5/3K part is unused and in its original packaging.
Return procedure for REG710NA-5/3K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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