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Texas Instruments REG711EA-5/250
- Part No.:
- REG711EA-5/250
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REG711EA-5/250.pdf
- Description:
- IC REG CHARG PUMP 5V 50MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:819
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Product details
Overview
REG711EA-5/250 from Texas Instruments is a 50mA switched-capacitor DC/DC converter delivering a regulated 5.0V output from 2.7V–5.5V input, featuring automatic buck/boost mode switching, 1MHz internal oscillator, and thermal/current protection in an MSOP-8 package. It enables compact, inductorless power conversion for battery-powered portable devices requiring stable 5V rail generation.
For engineers reviewing the REG711EA-5/250 datasheet, REG711EA-5/250 pinout, REG711EA-5/250 application, or REG711EA-5/250 equivalent, key selection criteria include input voltage range compatibility (2.7V–5.5V), 50mA output capability, shutdown current (<2µA), output ripple (≤40mVp-p at 50mA), and MSOP-8 thermal resistance (150°C/W).
Technical Context
The REG711EA-5/250 operates in automatic step-up or step-down mode depending on input-to-output voltage relationship: it enters boost mode when VIN < 3.2V (for 5V output) and functions as a variable pulse-width switch-mode regulator in buck mode above that threshold. Its charge-pump architecture uses CPUMP, CIN, and COUT to achieve regulation without inductors.
Internal protection includes thermal shutdown at 160°C with 140°C recovery, current limiting up to 80mA short-circuit output, and low-noise operation enabled by 1MHz switching and peak current reduction circuitry. Quiescent current is 60µA at no load and drops to <2µA in shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±2.5% (4.75–5.25V) at ≤50mA load ensures stable logic-level supply for microcontrollers and peripherals. |
| Input Voltage Range | 2.7V to 5.5V supports single-cell Li-ion (3.0–4.2V), two-cell alkaline (2.4–3.2V), and USB-powered systems. |
| Max Output Current | 50mA continuous output sustains power for SIM cards, smart card readers, and low-power LCD bias rails. |
| Switching Frequency | 1MHz oscillator enables use of small 0.22µF ceramic pump capacitor and 2.2µF input/output capacitors, minimizing board area. |
| Output Ripple | ≤40mVp-p at 50mA load meets noise-sensitive analog and RF subsystem requirements without additional filtering. |
| Quiescent Current | 60µA at no load and <2µA in shutdown extends battery life in always-on or sleep-mode applications. |
| Thermal Protection | Shuts down at 160°C junction temperature and recovers at 140°C, preventing permanent damage during sustained overload. |
Pinout & Package
REG711EA-5/250 is housed in an 8-pin MSOP (VSSOP-DGK) package with 0.65mm pitch and <1.1mm height, optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Unbonded pin; must be left floating-no PCB trace or component connection required. |
| 2 (ENABLE) | Logic Control Input | Active-high enable: ≥1.3V enables regulation; ≤0.4V places device in <2µA shutdown mode. |
| 3 (VIN) | Main Power Input | Accepts 2.7–5.5V unregulated source; supplies both charge pump and internal circuitry. |
| 4 (GND) | Analog Ground Reference | Reference node for internal control circuitry; separate from power ground (PGND) to reduce noise coupling. |
| 5 (VOUT) | Regulated Output | Delivers 5.0V ±2.5% to load; requires 2.2µF ceramic capacitor (X7R/X5R) placed adjacent to pin. |
| 6 (CPUMP+) | Charge Pump Positive Terminal | Connects to positive side of 0.22µF ceramic pump capacitor; critical path for charge transfer efficiency. |
| 7 (CPUMP−) | Charge Pump Negative Terminal | Connects to negative side of 0.22µF pump capacitor; forms flying capacitor loop with CPUMP+. |
| 8 (PGND) | Power Ground Return | High-current return path for pump and output capacitors; must be star-connected to minimize ripple and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless Architecture | Eliminates magnetic components and associated EMI, enabling ultra-thin (<1.1mm) PCB profiles for handheld meters and PCMCIA cards. |
| Auto Buck/Boost Mode Switching | Maintains 5V regulation across full 2.7–5.5V input range-no external mode selection or control logic needed. |
| Low-Ripple 1MHz Operation | Enables use of compact 0.22µF/2.2µF ceramic capacitors instead of larger tantalum or electrolytic types, reducing cost and footprint. |
| Ultra-Low Shutdown Current | <2µA shutdown current preserves battery charge during extended idle periods in smart card readers and modems. |
| Integrated Protection | Thermal shutdown (160°C) and current limit (80mA) prevent failure under fault conditions without external circuitry. |
Applications
| Smart Card Readers | Cellular Phone Peripherals |
|---|---|
Use Scenario: Powers ISO 7816-compliant smart card interface circuits during card insertion and data exchange. IC Role / Device Role / Timing Role: Provides isolated, low-noise 5V VCC rail for card power and level-shifting logic. Use Value: Enables direct battery operation (2.7–4.2V) without bulky inductors, meeting PC/SC compliance for portable readers. | Use Scenario: Supplies 5V to SIM card slots, Bluetooth modules, or camera interfaces in feature phones. IC Role / Device Role / Timing Role: Acts as dedicated SIM card power regulator with fast transient response to burst data transfers. Use Value: Delivers clean 5V at ≤40mVp-p ripple, preventing communication errors during high-speed SIM I/O operations. |
| Notebook Subsystems | Handheld Meters |
Use Scenario: Generates 5V auxiliary rail for USB host controllers, card readers, or touchpad controllers in palm-top computers. IC Role / Device Role / Timing Role: Serves as secondary DC/DC converter for non-core peripherals, decoupled from main CPU power domain. Use Value: Reduces BOM count by replacing discrete LDO + inductor solutions, saving >30mm² PCB area in tight layouts. | Use Scenario: Powers precision ADC front-ends, LCD bias generators, and microcontroller peripherals in portable multimeters. IC Role / Device Role / Timing Role: Supplies stable 5V reference rail with minimal load-dependent drift (<±0.5% over –40°C to +85°C). Use Value: Maintains measurement accuracy by limiting output voltage drift to <100ppm/°C, verified across production lots. |
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, 100mA max, ±1.5% accuracy, 1.2MHz switching, SO-8 package. | Higher output current and tighter regulation, but larger SO-8 footprint and higher quiescent current (120µA). | Choose MAX680ESA+ when >50mA load or tighter output tolerance is required; verify layout compatibility with SO-8 vs MSOP-8. |
| TPS60403DBVR | 5V output, 60mA max, ±3% accuracy, 1MHz switching, SOT-23-6 package, no ENABLE pin. | Smaller SOT-23-6 footprint but lacks shutdown control and has wider output tolerance; requires external resistor divider for feedback. | Choose TPS60403DBVR only for space-constrained designs where shutdown control is unnecessary and ±3% output variation is acceptable. |
Compared with MAX680ESA+ and TPS60403DBVR, REG711EA-5/250 offers optimal balance of 50mA capability, 2.7–5.5V input flexibility, <2µA shutdown, and MSOP-8 thermal performance-making it ideal for battery-powered smart card and modem applications where size, efficiency, and control granularity matter.
Availability
REG711EA-5/250 is available at Aetrix Electronics and suitable for smart card readers, cellular phone peripherals, and handheld meters requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for REG711EA-5/250 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, embedded processing, and power management technologies, with decades of expertise in precision power conversion and signal chain solutions.
The REG711 product line delivers compact, inductorless DC/DC conversion for portable and battery-operated systems where board space, EMI, and quiescent power are critical constraints.
FAQ
What is the minimum input voltage required for REG711EA-5/250 to start up and regulate?
The REG711EA-5/250 guarantees startup with input voltages as low as 2.7V. Below this threshold, regulation cannot be maintained-this is specific to the -5V version, unlike other REG711 variants which support down to 1.8V. The device remains functional across its full 2.7V–5.5V operating range, automatically switching between buck and boost modes to sustain 5.0V output.
Does REG711EA-5/250 require external compensation components?
No, REG711EA-5/250 does not require external compensation components. Its internal control loop is fully integrated and factory-trimmed for stability with standard 2.2µF ceramic input/output capacitors and a 0.22µF ceramic pump capacitor. Adding external resistors or capacitors to the feedback path will disrupt regulation and is not supported per the datasheet.
Can REG711EA-5/250 drive a 50mA load continuously across its full temperature range?
Yes, REG711EA-5/250 is rated for 50mA continuous output across its specified operating temperature range of –40°C to +85°C. At elevated ambient temperatures (>70°C), thermal derating applies due to its 150°C/W θJA; maintaining adequate PCB copper area on PGND and proper airflow ensures full 50mA delivery without thermal shutdown.
What is the recommended capacitor dielectric type for REG711EA-5/250?
X7R or X5R ceramic dielectrics are explicitly recommended for CIN, COUT, and CPUMP in REG711EA-5/250 designs. These materials provide stable capacitance over voltage and temperature, low ESR (<0.1Ω), and minimal microphonic effects-critical for achieving ≤40mVp-p output ripple. Tantalum or aluminum electrolytic capacitors are discouraged due to higher ESR and inductance.
Is REG711EA-5/250 RoHS compliant and lead-free?
Yes, REG711EA-5/250 is RoHS compliant and features lead-free terminations with NiPdAu (nickel-palladium-gold) or NiPdAu/NiPdAu plating, per TI's packaging addendum. It carries Moisture Sensitivity Level 2 (260°C peak reflow, 1-year floor life) and is qualified for industrial temperature operation (–40°C to +85°C).
REG711EA-5/250 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):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5V
- 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-5/250 FAQ
1.How can I place an order for REG711EA-5/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG711EA-5/250 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-5/250 reliable?
The price and inventory of REG711EA-5/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG711EA-5/250 is usually 5 days.
3.What payment methods are accepted for REG711EA-5/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG711EA-5/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG711EA-5/250?
REG711EA-5/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG711EA-5/250 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-5/250?
For technical support, including REG711EA-5/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG711EA-5/250 requirements.
6.How does Aetrix verify that REG711EA-5/250 is sourced from the original manufacturer or authorized distributors?
All REG711EA-5/250 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-5/250 meets industry standards.
7.What is the process for return or replacement of REG711EA-5/250?
All REG711EA-5/250 units undergo pre-shipment inspection (PSI). If there is an issue with REG711EA-5/250, 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-5/250 part is unused and in its original packaging.
Return procedure for REG711EA-5/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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