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Texas Instruments REG711EA-5/2K5
- Part No.:
- REG711EA-5/2K5
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REG711EA-5/2K5.pdf
- Description:
- IC REG CHARG PUMP 5V 50MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,203
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Product details
Overview
REG711EA-5/2K5 from Texas Instruments is a 50mA switched-capacitor DC/DC converter delivering a regulated 5.0V output with ±2.5% accuracy over load (≤50mA) and input (3.0–5.5V) ranges. It operates in automatic step-up/step-down mode, requires no inductor, and uses a 1MHz internal oscillator to enable compact 2.2µF ceramic capacitors. It serves as a low-EMI power supply for SIM card interfaces in portable communication devices.
For engineers reviewing the REG711EA-5/2K5 datasheet, REG711EA-5/2K5 pinout, REG711EA-5/2K5 application, or REG711EA-5/2K5 equivalent, key selection criteria include input voltage range (3.0–5.5V for 5V output), shutdown current (<2µA), thermal protection (160°C trip), ripple performance (40mVp-p at 50mA), and MSOP-8 package compatibility with space-constrained handheld designs.
Technical Context
The REG711EA-5/2K5 implements dual-mode charge-pump regulation: buck operation when VIN > VOUT and boost-only operation when VIN < VOUT (for the -5V variant, boost mode activates below ~3.2V). Its control architecture skips switching cycles to regulate output, eliminating need for external compensation.
It integrates thermal shutdown (160°C trip, 140°C recovery), current limiting (80mA short-circuit), and low-noise 1MHz oscillator. Input current ripple is minimized via peak-current reduction circuitry, and ground current is 60µA at no load and <2µA in shutdown-critical for battery runtime in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±2.5% (4.75–5.25V) at ≤50mA load and 3.0–5.5V input-ensures stable logic-level supply for SIM cards and smart peripherals. |
| Input Voltage Range | 3.0V to 5.5V (guaranteed startup); wider than standard LDOs-supports single-cell Li-ion (3.0V min) and USB-powered systems. |
| Max Output Current | 50mA continuous; 80mA short-circuit limit-sufficient for SIM card power (typically 10–30mA) with margin for transient loads. |
| Oscillator Frequency | 1.0MHz fixed-enables use of small 2.2µF ceramic capacitors, reducing PCB area and cost vs. lower-frequency inductor-based converters. |
| Quiescent Current | 60µA at no load; <2µA in shutdown-extends battery life in always-on or intermittently active portable devices. |
| Output Ripple | 40mVp-p at 50mA load with 2.2µF COUT-meets noise requirements for analog-sensitive circuits like card readers and RF front-ends. |
| Thermal Shutdown | 160°C junction trip temperature with 20°C hysteresis-protects device during sustained overload without requiring external thermal management. |
Pinout & Package
REG711EA-5/2K5 is housed in an 8-pin MSOP (VSSOP-DGK) package with 0.65mm pitch and <1.1mm height-optimized for ultra-thin portable electronics. Pin functions are validated per TI SBVS027A datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NC | No-connect | Unbonded pad; must remain floating-no routing or soldering required. |
| 2 - ENABLE | Logic control input | Active-high digital enable (1.3V min high, 0.4V max low); controls shutdown mode and <2µA quiescent state. |
| 3 - VIN | Main power input | Accepts 3.0–5.5V unregulated source; supplies both charge pump and internal circuitry. |
| 4 - GND | Analog ground reference | Low-impedance return path for internal bias and control circuits; separate from PGND for noise isolation. |
| 5 - VOUT | Regulated output | Delivers 5.0V ±2.5% to load; requires 2.2µF ceramic capacitor placed adjacent to pin for stability and low ripple. |
| 6 - CPUMP+ | Charge pump positive terminal | Connects to 0.22µF ceramic capacitor; forms flying capacitor node for voltage doubling in boost mode. |
| 7 - CPUMP− | Charge pump negative terminal | Return path for CPUMP; tied internally to PGND during specific half-cycles-requires low-inductance layout. |
| 8 - PGND | Power ground | High-current return for charge pump switching; must be star-connected near pins 4 and 8 to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck/boost mode switching | Seamlessly transitions between step-down and boost operation without external control-enables single-supply operation across varying battery voltages. |
| No-inductor architecture | Eliminates magnetic components, EMI filters, and layout sensitivity-reduces BOM count, board area, and design validation effort. |
| 1MHz internal oscillator | Permits use of miniature 0.22µF/2.2µF ceramic capacitors instead of bulky tantalum or electrolytics-improves reliability and temperature stability. |
| Thermal + current protection | Integrated 160°C shutdown and 80mA current limit prevent damage during fault conditions-removes need for external protection circuitry. |
| Ultra-low shutdown current | <2µA shutdown draw extends shelf life and standby time in battery-powered devices where intermittent operation is required. |
Applications
| Smart Card Reader Power | SIM Card Interface Supply |
|---|---|
|
Use Scenario: Powers ISO 7816-compliant smart card readers in handheld meters and point-of-sale terminals. IC Role / Device Role / Timing Role: Provides regulated 5.0V supply to card VCC pin with fast transient response and low noise. Use Value: Meets ISO 7816-3 voltage tolerance (4.75–5.25V) and supports hot-plug detection without brownout or reset glitches. |
Use Scenario: Supplies power to GSM/UMTS/LTE SIM cards in cellular handsets and IoT modules. IC Role / Device Role / Timing Role: Delivers stable 5V rail during SIM activation, data transfer, and sleep modes. Use Value: 60µA quiescent current and <2µA shutdown draw preserve battery life during long idle periods between network handshakes. |
| Portable Modem Power | LCD Display Bias Supply |
|
Use Scenario: Generates clean 5V for baseband processor I/O and modem interface logic in embedded modems. IC Role / Device Role / Timing Role: Acts as secondary regulated rail decoupled from noisy main system supply. Use Value: 40mVp-p output ripple prevents bit errors in UART/SPI communication links operating at up to 115.2 kbps. |
Use Scenario: Supplies VDD for segment LCD drivers in handheld test equipment and medical displays. IC Role / Device Role / Timing Role: Provides low-noise, low-ripple 5V bias independent of main display controller supply. Use Value: MSOP-8 footprint and <1.1mm height allow integration behind thin LCD glass-critical for <10mm total device thickness. |
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 rating, ±1.5% accuracy, 10kHz oscillator-requires larger capacitors and delivers higher current but with greater ripple (100mVp-p). | Better suited for higher-load applications like legacy RS-232 transceivers; less optimal for space-constrained SIM card slots. | Choose MAX680ESA+ only if >50mA load or tighter output tolerance is required; REG711EA-5/2K5 offers superior size, efficiency, and noise performance at 50mA. |
| TPS60403DBVR | 5V output, 60mA, ±3% accuracy, 1MHz oscillator, 50mVp-p ripple, same MSOP-8 package-but lacks thermal shutdown and has 10µA shutdown current. | Compatible pinout and footprint; suitable for cost-sensitive designs where thermal robustness is secondary. | Select TPS60403DBVR for drop-in replacement where thermal protection is managed externally; REG711EA-5/2K5 provides integrated safety and lower shutdown current. |
Compared with MAX680ESA+ and TPS60403DBVR, REG711EA-5/2K5 uniquely combines 50mA capability, 40mVp-p ripple, <2µA shutdown, and full thermal/current protection in a 3×3mm MSOP-8 package-making it the most balanced choice for battery-powered smart-card and SIM interfaces.
Availability
REG711EA-5/2K5 is available at Aetrix Electronics and suitable for smart card readers, SIM card interfaces, and portable modems requiring stable component supply, consistent tape-and-reel packaging (2500 pcs/reel), and long-term industrial lifecycle support.
Supply support for REG711EA-5/2K5 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 ICs, with decades of expertise in precision power conversion and low-power system design.
The REG711 product line was engineered specifically for ultra-compact, inductorless DC/DC conversion in battery-powered portable electronics-targeting SIM card, smart card, and LCD bias applications where size, EMI, and quiescent current are critical.
FAQ
What is the minimum input voltage required for REG711EA-5/2K5 to start up and regulate?
The REG711EA-5/2K5 guarantees startup at 2.7V input for its 5V output version. Stable regulation is maintained across 3.0V to 5.5V under load (≤50mA). Below 3.0V, output may droop or fall out of specification-this is documented in the "Input Voltage" row of the Electrical Characteristics table in TI SBVS027A.
Can REG711EA-5/2K5 operate with input voltage lower than 5V while still delivering regulated 5V output?
Yes-REG711EA-5/2K5 automatically switches to boost mode when input falls below ~3.2V, enabling regulated 5V output from as low as 2.7V input. This behavior is confirmed in the Theory of Operation section and Table II of the datasheet, which specifies the mode-change threshold for the -5V variant.
What capacitor values are recommended for REG711EA-5/2K5 in a typical application?
TI recommends 2.2µF X7R ceramic for CIN and COUT, and 0.22µF X7R ceramic for CPUMP-all in 1206 case size. These values ensure ≤40mVp-p ripple at 50mA and stable regulation across temperature. Larger COUT (e.g., 10µF) further reduces ripple but is not required for basic compliance.
Does REG711EA-5/2K5 include built-in protection features?
Yes-REG711EA-5/2K5 integrates thermal shutdown (160°C trip, 140°C recovery), output current limiting (80mA short-circuit), and input overvoltage protection (absolute max VIN = 5.5V). These protections are fully specified in the Absolute Maximum Ratings and Electrical Characteristics tables of SBVS027A.
Is REG711EA-5/2K5 compatible with lead-free reflow processes?
Yes-REG711EA-5/2K5 is RoHS-compliant and rated for MSL Level-2-260°C-1 year. Its VSSOP-8 (DGK) package supports standard lead-free reflow profiles with peak temperature up to 260°C, as confirmed in TI's Package Option Addendum dated 11-Nov-2025.
REG711EA-5/2K5 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-5/2K5 FAQ
1.How can I place an order for REG711EA-5/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG711EA-5/2K5 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-5/2K5 reliable?
The price and inventory of REG711EA-5/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG711EA-5/2K5 is usually 5 days.
3.What payment methods are accepted for REG711EA-5/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG711EA-5/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG711EA-5/2K5?
REG711EA-5/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG711EA-5/2K5 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-5/2K5?
For technical support, including REG711EA-5/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG711EA-5/2K5 requirements.
6.How does Aetrix verify that REG711EA-5/2K5 is sourced from the original manufacturer or authorized distributors?
All REG711EA-5/2K5 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-5/2K5 meets industry standards.
7.What is the process for return or replacement of REG711EA-5/2K5?
All REG711EA-5/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with REG711EA-5/2K5, 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-5/2K5 part is unused and in its original packaging.
Return procedure for REG711EA-5/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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