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Texas Instruments REG711EA-3.3/250
- Part No.:
- REG711EA-3.3/250
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REG711EA-3.3/250.pdf
- Description:
- IC REG CHG PUMP 3.3V 50MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,247
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Product details
Overview
REG711EA-3.3/250 from Texas Instruments is a 50mA switched-capacitor DC/DC converter delivering a regulated 3.3V output from 1.8V–5.5V input, supporting automatic step-up/step-down operation without inductors, featuring 1MHz internal oscillator, <40mVp-p output ripple at 50mA load, and shutdown mode with <2µA quiescent current. It serves as a compact, low-EMI power supply for SIM card interfaces in portable communication devices.
For engineers reviewing the REG711EA-3.3/250 datasheet, REG711EA-3.3/250 pinout, REG711EA-3.3/250 application, or REG711EA-3.3/250 equivalent, key selection criteria include input voltage range compatibility (1.8V–5.5V), guaranteed 3.3V ±3% regulation at 50mA, MSOP-8 thermal resistance (150°C/W), shutdown control logic levels (0.4V low / 1.3V high), and absence of magnetic components in BOM.
Technical Context
The REG711EA-3.3/250 implements dual-mode charge-pump regulation: buck mode when VIN > 4.0V (step-down), boost mode when VIN < 4.0V (step-up), with automatic transition at ~4.0V per datasheet Table II. Internal 1MHz oscillator enables use of small 0.22µF pump and 2.2µF input/output ceramic capacitors.
It integrates thermal shutdown (trip at 160°C, recover at 140°C), current limiting (80mA short-circuit capability), and peak current reduction circuitry to minimize input current ripple. Ground pin quiescent current is 60µA at no load and drops to ≤2µA in shutdown, supporting battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±3% (3.14–3.46V) at 15mA; maintains regulation across full 1.8V–5.5V input range |
| Max Output Current | 50mA continuous; supports typical SIM card and smart card reader loads |
| Input Voltage Range | 1.8V to 5.5V - compatible with single-cell Li-ion (2.7–4.2V), two-cell alkaline (2.0–3.2V), and three-cell NiMH (3.0–4.5V) |
| Oscillator Frequency | 1.0MHz - enables use of 0.22µF CPUMP and 2.2µF CIN/COUT in 1206 package, reducing board area vs. inductor-based solutions |
| Output Ripple | ≤40mVp-p at 50mA load with ESR <0.1Ω capacitors - meets noise requirements for digital baseband and RF front-end power domains |
| Quiescent Current | 60µA at no load; <2µA in shutdown - extends battery life in always-on portable devices |
| Thermal Protection | Shuts down at 160°C junction temperature; recovers autonomously at 140°C - prevents permanent damage during sustained overload |
Pinout & Package
VSSOP-8 (DGK) package, 3.0mm × 3.0mm × 1.0mm height, exposed pad not present, RoHS-compliant, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NC | No Connect | Internally unused; must be left floating or tied to GND per layout guidelines |
| 2 - ENABLE | Logic Control Input | Active-high enable: ≥1.3V = ON; ≤0.4V = shutdown (<2µA IQ) |
| 3 - VIN | Main Power Input | Accepts 1.8V–5.5V; supplies charge pump and internal circuitry; requires local 2.2µF ceramic decoupling |
| 4 - GND | Analog Ground Reference | Low-impedance return for control circuitry; star-ground point per layout recommendation |
| 5 - VOUT | Regulated Output | Stable 3.3V ±3%; drives load up to 50mA; requires 2.2µF ceramic output capacitor |
| 6 - CPUMP+ | Charge Pump Positive Terminal | Connects to positive plate of 0.22µF pump capacitor; switches between VIN and VOUT during cycle phases |
| 7 - CPUMP− | Charge Pump Negative Terminal | Connects to negative plate of 0.22µF pump capacitor; forms flying capacitor node for voltage doubling/inversion |
| 8 - PGND | Power Ground Return | High-current return path for pump and output switching; separate from analog GND to reduce noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless architecture | Eliminates magnetic components, EMI filters, and associated layout constraints - reduces BOM count and PCB area by >30% vs. buck/boost ICs |
| Auto step-up/step-down mode switching | Seamlessly transitions between buck and boost operation at VIN ≈ 4.0V - maintains regulation across battery discharge curve without external control |
| Low-noise 1MHz switching | Enables use of small, low-ESR ceramic capacitors (0.22µF/2.2µF) - achieves <40mVp-p ripple while avoiding audible switching noise |
| Ultra-low shutdown current | <2µA max shutdown IQ - extends shelf life and standby time in battery-powered card readers and modems |
| Integrated protection | Thermal shutdown + current limit (80mA short-circuit) - protects IC and downstream circuitry during fault conditions without external components |
Applications
| Smart Card Readers | Cellular Phone Baseband |
|---|---|
|
Use Scenario: Powers ISO 7816-compliant smart card interface circuitry in handheld payment terminals and secure authentication devices. IC Role / Device Role / Timing Role: Provides stable 3.3V supply to card VCC pin under varying battery voltage (2.8–4.2V), enabling hot-plug detection and protocol negotiation. Use Value: Maintains regulation during battery sag and load transients, ensuring reliable card reset and data exchange without brownout resets. |
Use Scenario: Supplies 3.3V to baseband processor I/O banks and SIM card slot in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Delivers clean, low-ripple power to digital logic domains sensitive to supply noise, synchronized to modem sleep/wake cycles via ENABLE pin. Use Value: Enables <2µA shutdown current during deep-sleep modes, extending talk time by >15% versus linear regulators with higher quiescent draw. |
| SIM Card Supplies | PCMCIA/CardBus Interfaces |
|
Use Scenario: Generates 3.3V for 3V-class SIM cards in feature phones and IoT modules where main rail is 2.8V or 4.2V. IC Role / Device Role / Timing Role: Acts as dedicated SIM power manager, handling voltage translation and transient response during card insertion/removal events. Use Value: Guarantees 3.3V ±3% over full temperature range (–40°C to +85°C), meeting ETSI TS 102 221 SIM electrical requirements. |
Use Scenario: Powers 3.3V logic in PCMCIA Type II/III and CardBus peripherals such as wireless LAN adapters and serial port cards. IC Role / Device Role / Timing Role: Replaces discrete LDO+inductor solutions in space-constrained add-in cards, providing fast turn-on for hot-plug enumeration. Use Value: Achieves full 50mA output within 100µs of ENABLE assertion, satisfying PCMCIA power sequencing timing windows. |
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 |
|---|---|---|---|
| MAX881R–3.3 | 30mA output, 2.7V–5.5V input, fixed 3.3V, 1.2MHz switching, no shutdown pin | Lacks ENABLE control; lower current rating limits use in multi-card or high-speed SIM interfaces | Select when board space is critical and shutdown functionality is unnecessary |
| TPS60230RGTR | 60mA output, 1.8V–5.5V input, adjustable output (via resistor divider), 1.1MHz, integrated soft-start | Requires external feedback resistors; higher pin count (16-pin QFN); no thermal shutdown | Choose for designs needing programmable voltage or higher current, accepting added complexity and footprint |
Compared with MAX881R–3.3 and TPS60230RGTR, REG711EA-3.3/250 uniquely combines 50mA capability, true shutdown control, thermal protection, and MSOP-8 compactness - making it optimal for cost- and space-sensitive portable card interfaces requiring robust fault handling.
Availability
REG711EA-3.3/250 is available at Aetrix Electronics and suitable for smart card readers, cellular phone baseband subsystems, and SIM card power management requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for REG711EA-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 company specializing in analog and embedded processing technologies, with leadership in power management ICs since the 1980s.
The REG711 family was designed specifically for low-power, inductorless DC/DC conversion in portable and battery-operated systems - targeting SIM card, smart card, and peripheral interface applications where size, EMI, and quiescent current are critical.
FAQ
What is the minimum input voltage required for REG711EA-3.3/250 to start regulation?
The REG711EA-3.3/250 guarantees startup and regulation down to 1.8V input across its full operating temperature range (–40°C to +85°C). At 1.8V input, it operates in boost mode to deliver 3.3V output up to 50mA, as confirmed in the "INPUT VOLTAGE" specification table under "All Other Models" condition.
Does REG711EA-3.3/250 require external compensation components?
No, REG711EA-3.3/250 is internally compensated and requires only three external capacitors: 2.2µF input (CIN), 2.2µF output (COUT), and 0.22µF pump (CPUMP), all ceramic X7R/X5R types in 1206 package. No resistors, inductors, or compensation networks are needed - simplifying design and validation.
How does REG711EA-3.3/250 behave when input voltage crosses the 4.0V threshold?
At approximately VIN = 4.0V, REG711EA-3.3/250 automatically transitions between boost mode (VIN < 4.0V) and buck mode (VIN > 4.0V) without interruption or output dropout. This seamless mode switching is intrinsic to its charge-pump architecture and requires no external control or configuration - maintaining continuous 3.3V regulation across battery discharge.
Can REG711EA-3.3/250 drive a 50mA load continuously at 85°C ambient temperature?
Yes, REG711EA-3.3/250 delivers full 50mA output continuously at TA = +85°C, as validated by the "MAXIMUM LOAD CURRENT vs INPUT VOLTAGE" curve (Figure 5) and thermal resistance θJA = 150°C/W. With proper PCB copper area on PGND/GND pins, junction temperature remains within safe limits under worst-case 5.5V input and 50mA load.
What is the recommended capacitor dielectric and case size for REG711EA-3.3/250?
Texas Instruments specifies X7R or X5R ceramic dielectrics in 1206 case size for CIN, COUT, and CPUMP. Recommended values are 2.2µF (CIN, COUT) and 0.22µF (CPUMP), all rated ≥10V. Leaded or tantalum capacitors are discouraged due to higher ESR and inductance, which increase output ripple beyond the specified 40mVp-p.
REG711EA-3.3/250 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):
- 3.3V
- 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-3.3/250 FAQ
1.How can I place an order for REG711EA-3.3/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG711EA-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 REG711EA-3.3/250 reliable?
The price and inventory of REG711EA-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 REG711EA-3.3/250 is usually 5 days.
3.What payment methods are accepted for REG711EA-3.3/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG711EA-3.3/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG711EA-3.3/250?
REG711EA-3.3/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG711EA-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 REG711EA-3.3/250?
For technical support, including REG711EA-3.3/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG711EA-3.3/250 requirements.
6.How does Aetrix verify that REG711EA-3.3/250 is sourced from the original manufacturer or authorized distributors?
All REG711EA-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 REG711EA-3.3/250 meets industry standards.
7.What is the process for return or replacement of REG711EA-3.3/250?
All REG711EA-3.3/250 units undergo pre-shipment inspection (PSI). If there is an issue with REG711EA-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 REG711EA-3.3/250 part is unused and in its original packaging.
Return procedure for REG711EA-3.3/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REG711EA-3.3/250 Tags
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