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Texas Instruments REG711EA-3/250
- Part No.:
- REG711EA-3/250
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REG711EA-3/250.pdf
- Description:
- IC REG CHARG PUMP 3V 50MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:113
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Product details
Overview
REG711EA-3/250 from Texas Instruments is a 3.0V fixed-output, 50mA switched-capacitor DC/DC converter in MSOP-8 package, supporting automatic step-up/step-down operation across 1.8V–5.5V input range, delivering low-ripple regulated output without inductors for SIM card supplies and portable communication devices.
For engineers reviewing the REG711EA-3/250 datasheet, REG711EA-3/250 pinout, REG711EA-3/250 application, or REG711EA-3/250 equivalent, key selection criteria include input voltage flexibility (1.8V–5.5V), 3.0V ±5% output accuracy at 50mA, 1MHz switching frequency enabling 2.2µF ceramic capacitors, shutdown current <2µA, and thermal/current protection in a 3mm × 3mm thin VSSOP package.
Technical Context
The REG711EA-3/250 operates in automatic buck-boost mode: when VIN > 3.7V, it functions as a step-down regulator using pulse-width modulation; when VIN < 3.7V, it switches to charge-pump boost mode with 50% duty-cycle oscillator. Internal FETs Q1–Q4 reconfigure dynamically between buck and boost topologies without external control.
It integrates peak current limiting to suppress input ripple, thermal shutdown at 160°C with 140°C hysteresis, and overcurrent protection limiting short-circuit output to 80mA. Ground current is 60µA at no load and drops to ≤2µA in shutdown, enabling battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0V ±5% (2.85V–3.15V) at 50mA load; maintains regulation across full 1.8V–5.5V input range |
| Max Output Current | 50mA continuous; 80mA short-circuit current limit protects device and load |
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, dual/triple alkaline/Ni-based batteries |
| Switching Frequency | 1MHz - enables use of compact 2.2µF X7R ceramic capacitors (CIN/COUT) and 0.22µF CPUMP |
| Output Ripple | 40mVP-P at 50mA - achieved with ESR <0.1Ω capacitors; reduced further with 10µF COUT |
| Quiescent Current | 60µA at no load; ≤2µA in shutdown - extends battery life in always-on portable systems |
| Thermal Protection | Shuts down at 160°C junction temperature; recovers automatically at 140°C |
Pinout & Package
VSSOP-8 (DGK) package: 3.0mm × 3.0mm body, 0.65mm pitch, 1.1mm max height, RoHS-compliant, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Unbonded pad; must be left floating or grounded per layout guidelines |
| 2 (ENABLE) | Logic Control Input | Active-high enable: ≥1.3V = ON (60µA IQ); ≤0.4V = shutdown (<2µA IQ) |
| 3 (VIN) | Main Power Input | Accepts 1.8V–5.5V; supplies internal circuitry and charge pump; requires 2.2µF ceramic capacitor |
| 4 (GND) | Analog Ground Reference | Low-noise return path for control circuitry; star-grounded at Pin 5 (PGND) per layout recommendation |
| 5 (PGND) | Power Ground Return | High-current return for charge pump and output stage; designated PCB star ground point |
| 6 (VOUT) | Regulated Output | 3.0V ±5% at up to 50mA; requires 2.2µF ceramic capacitor (10µF reduces ripple further) |
| 7 (CPUMP+) | Charge Pump Positive Terminal | Connects to 0.22µF ceramic capacitor anode; switches between VIN and VOUT during cycle phases |
| 8 (CPUMP−) | Charge Pump Negative Terminal | Connects to 0.22µF ceramic capacitor cathode; completes flying capacitor path for voltage doubling |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless architecture | Eliminates magnetic components and EMI concerns - ideal for space-constrained portable designs |
| Auto buck-boost topology | Seamlessly transitions between step-down and step-up modes at VIN ≈ 3.7V without external configuration |
| Low-noise 1MHz oscillator | Enables small 0.22µF CPUMP and 2.2µF CIN/COUT - saves board area vs. lower-frequency alternatives |
| Ultra-low shutdown current | <2µA supply current in shutdown - preserves battery charge during system sleep states |
| Integrated protection suite | Thermal shutdown (160°C), current limiting (80mA), and ESD-hardened inputs (±2kV HBM) |
Applications
| Smart Card Readers | Cellular Phone Peripherals |
|---|---|
|
Use Scenario: Powering ISO 7816-compliant smart card interfaces in handheld readers and POS terminals. IC Role / Device Role / Timing Role: Provides stable 3.0V supply to card VCC pin under varying battery voltage (2.5V–4.2V) and transient loads. Use Value: Maintains card communication integrity during battery discharge without requiring separate LDO or inductor-based DC/DC. |
Use Scenario: Supplying 3.0V to SIM card slots and Bluetooth/Wi-Fi companion ICs in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Delivers regulated rail independent of main PMIC output, enabling hot-swap-safe SIM power control via ENABLE pin. Use Value: Enables zero-power SIM retention during phone standby using <2µA shutdown current. |
| PCMCIA/CardBus Interfaces | Handheld Meters |
|
Use Scenario: Generating 3.0V for legacy PCMCIA Type II cards in industrial data loggers and test equipment. IC Role / Device Role / Timing Role: Supplies compliant VCC to card socket while tolerating host battery sag below 3.0V during high-current operations. Use Value: Eliminates need for dual-rail power design - single 1.8V–5.5V source powers both host MCU and PCMCIA slot. |
Use Scenario: Powering 3.0V LCD displays, microcontrollers, and sensor signal chains in portable multimeters and clamp meters. IC Role / Device Role / Timing Role: Regulates output from two AA/AAA cells (1.8V–3.2V) to meet display contrast and ADC reference stability requirements. Use Value: Achieves 90% efficiency at 15mA load with 2.7V input - maximizes runtime on primary cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Fixed 5V output only; 100mA output; requires external timing capacitor; no ENABLE pin | Lacks adjustable shutdown and 3.0V output - unsuitable for SIM card or low-voltage logic rails | Select MAX680ESA+ only if 5V output and higher current are required and shutdown control is unnecessary |
| TPS60403DBVR | 3.3V output; 60mA output; 1.2MHz switching; integrated soft-start; same VSSOP-8 footprint | Slightly higher output voltage and current - may require level-shifting for 3.0V logic interfaces | Choose TPS60403DBVR when 3.3V rail is acceptable and soft-start is needed to prevent inrush into large capacitive loads |
Compared with MAX680ESA+ and TPS60403DBVR, REG711EA-3/250 uniquely delivers precise 3.0V output with ultra-low shutdown current (<2µA), automatic buck-boost operation across widest input range (1.8V–5.5V), and integrated ENABLE control - making it optimal for battery-powered 3.0V peripherals where voltage accuracy and quiescent power are critical.
Availability
REG711EA-3/250 is available at Aetrix Electronics and suitable for smart card readers, cellular phone peripherals, and handheld meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for REG711EA-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 company specializing in analog and embedded processing technologies, with leadership in power management ICs and precision analog solutions.
The REG711 family was designed specifically for low-noise, inductorless DC/DC conversion in battery-powered portable electronics - targeting SIM card, smart card, and peripheral rail generation where board space and EMI are constrained.
FAQ
What is the guaranteed output voltage tolerance for REG711EA-3/250 across its operating conditions?
The REG711EA-3/250 delivers 3.0V output with ±5% tolerance (2.85V to 3.15V) under all specified conditions: at 50mA load, input voltage between 2.2V and 5.5V, and ambient temperature from –40°C to +85°C. This is confirmed in the Electrical Characteristics table of the SBVS027A datasheet, where typical output is 3.0V and min/max limits are explicitly defined for full-load operation.
Can REG711EA-3/250 operate with input voltage below 2.2V, and what are the limitations?
Yes, REG711EA-3/250 supports input voltages as low as 1.8V, but output current capability degrades below 2.2V. At 1.8V input, maximum continuous output current is limited to 15mA (per datasheet conditions), and efficiency drops significantly. For full 50mA operation, input must remain above 2.2V - verified in the "OUTPUT VOLTAGE" specification table and MAXIMUM LOAD CURRENT vs INPUT VOLTAGE curve.
What capacitor types and values are mandatory for stable operation of REG711EA-3/250?
REG711EA-3/250 requires three ceramic capacitors: 2.2µF X7R/X5R for CIN and COUT (1206 size), and 0.22µF X7R/X5R for CPUMP (1206 size). Tantalum or electrolytic capacitors are not recommended due to higher ESR, which increases output ripple beyond the specified 40mVP-P. These values and dielectric requirements are validated in the Capacitor Selection section and Typical Operating Circuit (Figure 3) of SBVS027A.
How does the ENABLE pin function, and what are its voltage thresholds for REG711EA-3/250?
The ENABLE pin on REG711EA-3/250 is active-high with logic thresholds defined as: ≥1.3V (relative to GND) enables normal operation (60µA quiescent current), and ≤0.4V places REG711EA-3/250 into shutdown mode (<2µA quiescent current). Input leakage is ±100nA across the full input range. These parameters are specified in the Electrical Characteristics table under "ENABLE CONTROL".
Is REG711EA-3/250 pin-compatible with other variants in the REG711 family, such as REG711EA-5/250 or REG711EA-2.5/250?
Yes, all REG711EA-x/250 variants share identical VSSOP-8 (DGK) packaging, pinout, and footprint - including REG711EA-3/250, REG711EA-5/250, and REG711EA-2.5/250. The only differences are output voltage setting and device marking (C11D vs C11B vs C11G); no PCB redesign is needed when substituting between these versions for voltage-scaling evaluation or design reuse.
REG711EA-3/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 50mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
REG711EA-3/250 FAQ
1.How can I place an order for REG711EA-3/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG711EA-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 REG711EA-3/250 reliable?
The price and inventory of REG711EA-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 REG711EA-3/250 is usually 5 days.
3.What payment methods are accepted for REG711EA-3/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG711EA-3/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG711EA-3/250?
REG711EA-3/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG711EA-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 REG711EA-3/250?
For technical support, including REG711EA-3/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG711EA-3/250 requirements.
6.How does Aetrix verify that REG711EA-3/250 is sourced from the original manufacturer or authorized distributors?
All REG711EA-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 REG711EA-3/250 meets industry standards.
7.What is the process for return or replacement of REG711EA-3/250?
All REG711EA-3/250 units undergo pre-shipment inspection (PSI). If there is an issue with REG711EA-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 REG711EA-3/250 part is unused and in its original packaging.
Return procedure for REG711EA-3/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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