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Texas Instruments REG710NA-3.3/250
- Part No.:
- REG710NA-3.3/250
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
REG710NA-3.3/250.pdf
- Description:
- IC REG CHARGE PUMP 3.3V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,404
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Product details
Overview
REG710NA-3.3/250 from Texas Instruments is a buck-boost switched-capacitor voltage regulator delivering a fixed 3.3 V output with up to 30 mA nominal load current, operating across 1.8 V–5.5 V input, and featuring automatic step-up/step-down mode switching without inductors. It serves as a compact, low-EMI power supply for space-constrained battery-powered systems such as SIM card interfaces and handheld displays.
For engineers reviewing the REG710NA-3.3/250 datasheet, REG710NA-3.3/250 pinout, REG710NA-3.3/250 application, or REG710NA-3.3/250 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 quiescent current (<1 μA), thermal protection (160°C trip), and SOT-23-6 package footprint constraints.
Technical Context
The REG710NA-3.3/250 implements a 1 MHz internal oscillator-driven charge pump architecture with automatic mode transition: it operates in step-down (buck) mode when VIN > ~4.0 V and switches to step-up (boost) mode below that threshold. Internal FETs (Q1–Q4) reconfigure dynamically to charge CPUMP and transfer energy to COUT, enabling regulation despite VIN crossing VOUT.
Control logic includes hardware enable/disable via the EN pin (1.3 V logic high threshold), thermal shutdown with hysteresis (160°C trip / 140°C recovery), and cycle-skipping for light-load efficiency. Input current ripple is minimized by peak-current limiting circuitry, and output ripple remains ≤35 mVPP at 30 mA with 2.2 μF ceramic capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±6.7% (3.1–3.5 V) over –40°C to +85°C, ensuring stable rail for 3.3 V logic and analog peripherals. |
| 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-supplied systems. |
| Max Output Current | 30 mA continuous - sufficient for low-power microcontrollers, smart card ICs, and LCD bias rails. |
| Quiescent Current | 65 μA typical - enables multi-year battery life in always-on sensor nodes or backup supplies. |
| Shutdown Current | 0.01 μA typical - reduces system standby drain to negligible levels during deep sleep modes. |
| Switching Frequency | 1 MHz - permits use of small 0.22 μF flying and 2.2 μF input/output ceramic capacitors, minimizing PCB area. |
| Thermal Shutdown | 160°C junction temperature - protects device and board under sustained overload or poor heatsinking. |
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 in DDC variant). Pin spacing: 0.95 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 5) | Power input | Accepts 1.8–5.5 V unregulated source; requires local 2.2 μF ceramic decoupling to suppress high-frequency ripple. |
| VOUT (Pin 1) | Regulated output | Delivers fixed 3.3 V; connects to 2.2 μF ceramic capacitor and load; output impedance <1 Ω ensures stability under dynamic loads. |
| GND (Pin 2) | Ground reference | Common return for input, output, and control circuits; must be low-impedance path to minimize noise coupling. |
| Enable (Pin 3) | Digital control input | Active-high logic (1.3 V min); pulls low to reduce IQ to 0.01 μA; must not float - tie to GND or MCU GPIO. |
| Cpump+ (Pin 6) | Flying capacitor terminal | Connects to positive side of 0.22 μF ceramic flying capacitor; carries high dv/dt switching current. |
| Cpump− (Pin 4) | Flying capacitor terminal | Connects to negative side of 0.22 μF ceramic flying capacitor; forms charge-transfer loop with Cpump+ and internal FETs. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck-boost operation | Seamlessly transitions between step-up and step-down modes at VIN ≈ 4.0 V, eliminating need for external mode selection logic. |
| No inductor required | Uses only ceramic capacitors (CIN, COUT, CPUMP), reducing EMI, board area, and BOM cost versus inductive DC-DC solutions. |
| Low output voltage ripple | ≤35 mVPP at 30 mA load ensures clean supply for noise-sensitive analog circuits and RF front-ends. |
| Thermal and current limit protection | Integrates foldback current limiting and 160°C thermal shutdown with 20°C hysteresis, preventing damage during short-circuit or overload events. |
| Minimal external components | Only three 0603/0805 ceramic capacitors needed - no diodes, resistors, or feedback networks - simplifying layout and qualification. |
Applications
| Smart Card Readers | LCD Displays |
|---|---|
Use Scenario: Powering ISO 7816-compliant smart card interface ICs requiring stable 3.3 V from variable battery sources (e.g., 2xAA or coin cell). IC Role / Device Role / Timing Role: Provides regulated 3.3 V rail with fast transient response to handle card insertion/removal surges and protocol handshaking bursts. Use Value: Eliminates need for separate LDO or inductor-based converter, reducing solution size by >40% while maintaining <1% VOUT deviation during 10–100 mA load steps. | Use Scenario: Supplying bias voltage for segment or character LCD modules in portable medical devices and industrial HMIs. IC Role / Device Role / Timing Role: Delivers low-noise 3.3 V for LCD driver ICs and controller logic, supporting wide input voltage range as batteries discharge from 4.2 V to 2.0 V. Use Value: Maintains display contrast and readability across full battery life due to tight output regulation (±6.7%) and <35 mVPP ripple, avoiding flicker or ghosting. |
| Handheld Devices | Battery Backup Supplies |
Use Scenario: Powering Bluetooth LE SoCs and sensors in compact wearables where PCB real estate is constrained and input voltage varies widely. IC Role / Device Role / Timing Role: Acts as primary 3.3 V supply for ultra-low-power microcontrollers, enabling operation down to 1.8 V input while delivering 30 mA peak current. Use Value: Extends usable battery capacity by 15–20% versus linear regulators through 90% peak efficiency in buck mode and 75% in boost mode at 10 mA. | Use Scenario: Providing fail-safe 3.3 V rail for RTC and SRAM retention during main power loss in industrial controllers and data loggers. IC Role / Device Role / Timing Role: Regulates backup power from supercapacitors or coin cells (1.8–3.0 V) to maintain 3.3 V for critical memory and timekeeping functions. Use Value: Enables >72-hour backup runtime using 0.1 F supercapacitor due to 0.01 μA shutdown current and guaranteed start-up at 1.8 V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60403DBVR | Fixed 3.3 V output, 60 mA max, 1.6–5.5 V input, but uses different charge-pump topology with higher 50 mVPP ripple and no thermal shutdown. | Higher output current suits heavier loads, but lacks integrated thermal protection - requires external thermal management in enclosed designs. | Select TPS60403DBVR only if >30 mA output is mandatory and thermal derating can be guaranteed externally. |
| MAX680ESA+ | Fixed 5 V output, 20 mA max, 4.5–6.2 V input - incompatible output voltage and narrower input range; no enable pin or shutdown mode. | Not suitable for 3.3 V systems; limited to legacy 5 V logic rails and lacks modern low-IQ features. | MAX680ESA+ is not a functional substitute for REG710NA-3.3/250 due to mismatched output voltage and missing enable/shutdown functionality. |
Compared with TPS60403DBVR and MAX680ESA+, the REG710NA-3.3/250 uniquely combines 3.3 V regulation, 30 mA capability, thermal protection, sub-1 μA shutdown, and true 1.8–5.5 V operation - making it the only drop-in solution for battery-powered 3.3 V systems requiring robustness and minimal footprint.
Availability
REG710NA-3.3/250 is available at Aetrix Electronics and suitable for smart card readers, LCD displays, handheld devices, battery backup supplies, and SIM card interfaces requiring stable component supply across long production lifecycles.
Supply support for REG710NA-3.3/250 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 leader specializing in analog and embedded processing technologies, with decades of expertise in power management ICs for industrial, automotive, and consumer applications.
The REG710 family was designed specifically for ultra-compact, inductorless DC-DC conversion in battery-powered portable electronics - prioritizing low quiescent current, wide input range, and seamless buck-boost operation without external mode control.
FAQ
What is the minimum input voltage required for REG710NA-3.3/250 to start regulating?
The REG710NA-3.3/250 starts regulating at 1.8 V input across its full operating temperature range (–40°C to +85°C). Startup is guaranteed per TI's recommended operating conditions, and the device maintains regulation even as VIN drops below 3.3 V into boost mode. This makes REG710NA-3.3/250 ideal for single-cell Li-ion and alkaline systems where voltage declines during discharge.
Can REG710NA-3.3/250 operate with input voltage equal to output voltage (VIN = VOUT = 3.3 V)?
Yes, REG710NA-3.3/250 operates continuously at VIN = 3.3 V. Its automatic mode-switching logic detects this condition and enters a pass-through-like state with minimal switching activity, achieving high efficiency (~85%) and low noise. The device does not require external configuration to handle VIN = VOUT - this behavior is intrinsic to its charge-pump architecture and is verified in the datasheet's efficiency curves.
What is the maximum allowable output capacitance for REG710NA-3.3/250?
The REG710NA-3.3/250 supports output capacitances up to 10 μF ceramic without stability issues. Increasing COUT beyond 2.2 μF (e.g., to 10 μF) further reduces output ripple to <15 mVPP at 30 mA, as confirmed in Figure 17 of the SBAS221H datasheet. Larger values do not degrade performance but offer diminishing returns on ripple reduction.
Does REG710NA-3.3/250 require a specific dielectric type for external capacitors?
Yes - X7R or X5R ceramic dielectrics are explicitly recommended for CIN, COUT, and CPUMP in the REG710NA-3.3/250 datasheet. These materials provide stable capacitance over voltage and temperature, low ESR (<0.1 Ω), and minimal microphonic effects. Tantalum or electrolytic capacitors are discouraged due to higher ESR, which increases output ripple and reduces efficiency.
How does the Enable pin behave during power-up of REG710NA-3.3/250?
The Enable pin of REG710NA-3.3/250 is active-high with a 1.3 V threshold and exhibits no power-on reset delay or glitch suppression. When VIN rises above 1.8 V, the device remains disabled until EN exceeds 1.3 V; pulling EN low before VIN stabilizes prevents unintended startup. TI recommends tying EN to a controlled GPIO or RC network to ensure synchronized enable timing - a floating EN pin may cause erratic behavior.
REG710NA-3.3/250 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):
- 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-3.3/250 FAQ
1.How can I place an order for REG710NA-3.3/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG710NA-3.3/250 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-3.3/250 reliable?
The price and inventory of REG710NA-3.3/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG710NA-3.3/250 is usually 5 days.
3.What payment methods are accepted for REG710NA-3.3/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG710NA-3.3/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG710NA-3.3/250?
REG710NA-3.3/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG710NA-3.3/250 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-3.3/250?
For technical support, including REG710NA-3.3/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG710NA-3.3/250 requirements.
6.How does Aetrix verify that REG710NA-3.3/250 is sourced from the original manufacturer or authorized distributors?
All REG710NA-3.3/250 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-3.3/250 meets industry standards.
7.What is the process for return or replacement of REG710NA-3.3/250?
All REG710NA-3.3/250 units undergo pre-shipment inspection (PSI). If there is an issue with REG710NA-3.3/250, 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-3.3/250 part is unused and in its original packaging.
Return procedure for REG710NA-3.3/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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