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Texas Instruments REG710NA-3.3/3K
- Part No.:
- REG710NA-3.3/3K
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
REG710NA-3.3/3K.pdf
- Description:
- IC REG CHARGE PUMP 3.3V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:17,805
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Product details
Overview
REG710NA-3.3/3K from Texas Instruments is a buck-boost switched-capacitor voltage regulator delivering a fixed 3.3 V output with up to 30 mA load current, operating across 1.8 V–5.5 V input, featuring automatic step-up/step-down mode switching, 1 MHz internal oscillator, and thermal/current protection. It serves as a compact, inductorless power supply for low-power portable systems.
For engineers reviewing the REG710NA-3.3/3K datasheet, REG710NA-3.3/3K pinout, REG710NA-3.3/3K application, or REG710NA-3.3/3K equivalent, key selection criteria include input voltage range compatibility (1.8–5.5 V), 3.3 V output regulation tolerance (±6.7% over temperature), shutdown current (<1 μA), efficiency at light loads (90% at 10 mA with VIN = 1.8 V), and SOT-23-6 package constraints.
Technical Context
The REG710NA-3.3/3K implements a variable-frequency charge-pump topology that autonomously switches between buck (VIN > VOUT) and boost (VIN < VOUT) modes based on input voltage-transitioning at ~4.0 V. Its control logic regulates output by skipping oscillator cycles rather than modulating duty cycle.
Internal FETs (Q1–Q4) reconfigure CPUMP between series-charge (boost) and parallel-transfer (buck) states; peak input current is actively limited to reduce EMI and ripple. The device requires only three external ceramic capacitors (CIN, COUT, CPUMP) and provides no-load quiescent current of 65 μA and shutdown current of 0.01 μA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±6.7% (3.1–3.5 V) over –40°C to +85°C, enabling stable bias for 3.3 V logic and analog circuitry |
| Input Voltage Range | 1.8 V to 5.5 V - supports single-cell Li-ion (2.7–4.2 V), 2–3 cell alkaline/nickel (2.0–4.5 V), and USB-powered systems |
| Max Output Current | 30 mA continuous - sufficient for SIM cards, smart card readers, and small LCD bias rails |
| Efficiency | 90% at 10 mA / VIN = 1.8 V - minimizes battery drain in always-on low-power subsystems |
| Quiescent Current | 65 μA typical - enables multi-day operation in battery-backed applications without shutdown |
| Shutdown Current | 0.01 μA typical - reduces standby leakage to negligible levels during system sleep |
| Switching Frequency | 1 MHz fixed oscillator - permits use of 0.22 μF flying capacitor and 2.2 μF input/output ceramics, saving board space |
Pinout & Package
SOT-23-6 package (2.90 mm × 1.60 mm body size, 0.95 mm height), thermally enhanced with exposed pad (not electrically connected in DDC variant); compatible with standard 0.95 mm pitch SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply | Accepts 1.8–5.5 V unregulated source; connects directly to 2.2 μF input capacitor to suppress high-frequency ripple |
| VOUT | Regulated output | Delivers fixed 3.3 V; connects to 2.2 μF output capacitor to maintain ≤35 mVPP ripple at 30 mA load |
| GND | Ground reference | Common return path for input, output, and pump circuits; must be low-impedance to minimize noise coupling |
| Enable | Hardware enable/disable | Active-high digital control (1.3–VIN V logic high); pulls low to reduce supply current to 0.01 μA; must not float |
| Cpump+ | Flying capacitor positive terminal | Connects to one side of 0.22 μF ceramic flying capacitor; switches between VIN and VOUT during charge/discharge phases |
| Cpump− | Flying capacitor negative terminal | Connects to other side of 0.22 μF flying capacitor; forms charge-transfer path essential for both buck and boost operation |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck-boost mode switching | Transitions at ~4.0 V input; eliminates need for external mode selection or dual-regulator designs in wide-input systems |
| No inductor required | Reduces EMI, saves PCB area, and lowers BOM cost versus inductive DC-DC converters - critical for space-constrained handhelds |
| Low output voltage ripple | ≤35 mVPP at 30 mA ensures clean supply for noise-sensitive analog blocks (e.g., ADC references, RF front-ends) |
| Thermal and current limit protection | Shuts down at 160°C junction temperature and limits short-circuit current to ~100 mA - prevents damage during fault conditions |
| Minimal external components | Only three 0603/0805 ceramic capacitors needed (CIN, COUT, CPUMP); simplifies layout and accelerates design validation |
Applications
| Smart Card Readers | LCD Display Bias |
|---|---|
|
Use Scenario: Powering ISO 7816-compliant contact-based smart cards in point-of-sale terminals and access control devices. IC Role / Device Role / Timing Role: Provides regulated 3.3 V supply to card interface ICs and microcontrollers during active transaction sequences. Use Value: Maintains stable VCC despite varying battery voltage (2.7–4.2 V), ensuring reliable card reset and data exchange per EMV standards. |
Use Scenario: Generating bias voltage for segment or character LCD modules in handheld meters and industrial HMI panels. IC Role / Device Role / Timing Role: Supplies precise 3.3 V rail to LCD driver ICs requiring low-noise, low-ripple DC input for consistent contrast and flicker-free display. Use Value: Delivers ≤35 mVPP ripple at 10–20 mA loads, eliminating visible screen artifacts and extending display lifetime. |
| Battery Backup Supplies | Handheld Device Subsystem Power |
|
Use Scenario: Maintaining real-time clock (RTC) and SRAM backup power during main system shutdown in wearables and IoT sensors. IC Role / Device Role / Timing Role: Acts as ultra-low-quiescent (65 μA) voltage translator between primary Li-ion (3.0–4.2 V) and 3.3 V backup domain. Use Value: Enables >1-year backup runtime on coin-cell batteries due to sub-1 μA shutdown current and minimal load dependency. |
Use Scenario: Powering Bluetooth LE radio, sensor signal chains, and touch controllers in compact medical and consumer handhelds. IC Role / Device Role / Timing Role: Serves as primary 3.3 V LDO-replacement supply for mixed-signal subsystems with dynamic current demand (1–30 mA). Use Value: Achieves >80% efficiency across full input range (1.8–5.5 V), extending battery life without thermal derating or layout complexity. |
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 |
|---|---|---|---|
| TPS60403DBVR | Fixed 3.3 V output, 60 mA max, 1.6–5.5 V input, requires 1 μF flying cap; higher IQ (110 μA) | Higher output current suits dual-rail sensor interfaces; less efficient below 2.5 V input | Choose when >30 mA load or tighter input ripple rejection is required; verify thermal performance at 60 mA |
| MAX680ESA+ | Fixed ±5 V dual output, 20 mA per rail, 4.5–6.5 V input; no shutdown, no thermal protection | Designed for op-amp dual-supply generation, not single-rail 3.3 V systems | Use only for legacy ±5 V analog bias; avoid for battery-powered 3.3 V applications due to missing safety features |
Compared with REG710NA-3.3/3K, TPS60403DBVR offers higher current but consumes more quiescent power, while MAX680ESA+ lacks shutdown and thermal protection-making REG710NA-3.3/3K optimal for modern low-power, safety-critical portable designs.
Availability
REG710NA-3.3/3K is available at Aetrix Electronics and suitable for smart card readers, LCD display bias, battery backup supplies, and handheld device subsystem power requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for REG710NA-3.3/3K 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 decades of expertise in precision voltage regulation and low-power system solutions.
The REG710 family was designed specifically for inductorless, wide-input-range power conversion in space-constrained portable electronics-targeting applications where EMI, board area, and battery life are critical constraints.
FAQ
What is the input voltage range supported by the REG710NA-3.3/3K?
The REG710NA-3.3/3K supports an input voltage range of 1.8 V to 5.5 V. This allows it to operate directly from single-cell Li-ion batteries (2.7–4.2 V), two- or three-cell alkaline/nickel chemistries (2.0–4.5 V), and USB-powered systems. Startup is guaranteed down to 1.8 V for the REG710NA-3.3/3K variant, making it suitable for deep-discharge battery applications.
Does the REG710NA-3.3/3K require external inductors?
No, the REG710NA-3.3/3K does not require external inductors. It uses a switched-capacitor (charge-pump) architecture with internal FETs and a 0.22 μF flying capacitor (CPUMP) to achieve buck-boost conversion. This eliminates magnetic components, reduces EMI, and saves PCB area-key advantages over inductive DC-DC converters.
What is the maximum continuous output current of the REG710NA-3.3/3K?
The REG710NA-3.3/3K delivers up to 30 mA continuous output current under recommended operating conditions (TA = –40°C to +85°C, VIN ≥ 2.2 V). At higher input voltages (e.g., VIN = 3.3–4.2 V), it can sustain this current with <6.7% output voltage deviation and ≤35 mVPP ripple, as specified in the electrical characteristics table.
How does the REG710NA-3.3/3K handle thermal overload?
The REG710NA-3.3/3K incorporates thermal shutdown protection that disables the output when the junction temperature reaches approximately 160°C. Once the die cools to ~140°C, the device automatically resumes regulation. This protects both the IC and downstream circuitry during sustained overload or poor PCB thermal design.
Can the REG710NA-3.3/3K be used in shutdown mode to minimize power consumption?
Yes, the REG710NA-3.3/3K features a dedicated Enable pin that places the device into shutdown mode when pulled low. In shutdown, quiescent current drops to 0.01 μA typical, effectively disconnecting the output from the input. The Enable pin must be actively driven-not left floating-to ensure reliable low-power operation.
REG710NA-3.3/3K 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):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- 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-3.3/3K FAQ
1.How can I place an order for REG710NA-3.3/3K through Aetrix?
Please submit a Request for Quotation (RFQ) for REG710NA-3.3/3K 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-3.3/3K reliable?
The price and inventory of REG710NA-3.3/3K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG710NA-3.3/3K is usually 5 days.
3.What payment methods are accepted for REG710NA-3.3/3K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG710NA-3.3/3K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG710NA-3.3/3K?
REG710NA-3.3/3K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG710NA-3.3/3K 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-3.3/3K?
For technical support, including REG710NA-3.3/3K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG710NA-3.3/3K requirements.
6.How does Aetrix verify that REG710NA-3.3/3K is sourced from the original manufacturer or authorized distributors?
All REG710NA-3.3/3K 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-3.3/3K meets industry standards.
7.What is the process for return or replacement of REG710NA-3.3/3K?
All REG710NA-3.3/3K units undergo pre-shipment inspection (PSI). If there is an issue with REG710NA-3.3/3K, 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-3.3/3K part is unused and in its original packaging.
Return procedure for REG710NA-3.3/3K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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