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Texas Instruments REG711EA-3.3/2K5
- Part No.:
- REG711EA-3.3/2K5
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REG711EA-3.3/2K5.pdf
- Description:
- IC REG CHG PUMP 3.3V 50MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,717
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Product details
Overview
REG711EA-3.3/2K5 from Texas Instruments is a 50mA switched-capacitor DC/DC converter delivering a regulated 3.3V output from 1.8V–5.5V input, operating in automatic step-up/step-down mode without inductors, featuring 1MHz internal oscillator, thermal/current protection, and MSOP-8 package for space-constrained portable systems.
For engineers reviewing the REG711EA-3.3/2K5 datasheet, REG711EA-3.3/2K5 pinout, REG711EA-3.3/2K5 application, or REG711EA-3.3/2K5 equivalent, key selection criteria include input voltage range compatibility with single-cell Li-ion or multi-cell alkaline/Ni-based batteries, low-quiescent current (60µA no-load), shutdown mode (<2µA), ripple performance (40mVp-p at 50mA), and capacitor-only external component requirement.
Technical Context
The REG711EA-3.3/2K5 implements automatic mode switching between buck and boost operation based on input-to-output voltage relationship-buck mode when VIN > ~4.0V, boost mode below that threshold-enabling regulation across wide input ranges. Its charge-pump architecture uses internal FETs (Q1–Q4) and a 1MHz oscillator to drive CPUMP, eliminating magnetic components while maintaining low EMI.
It integrates peak current limiting to reduce input/output ripple, thermal shutdown at 160°C with 140°C recovery, and overcurrent protection. Ground current is 1mA at full load, dropping to 60µA at no load and <2µA in shutdown-critical for battery runtime in handheld meters and SIM card supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±3% (3.14–3.46V at 15mA; 2.2–5.5V input range) |
| Max Output Current | 50mA continuous; supports transient loads up to 80mA short-circuit |
| Input Voltage Range | 1.8V to 5.5V-compatible with single Li-ion (2.7–4.2V), two NiMH (2.0–2.8V), or three alkaline (3.0–4.5V) cells |
| Switching Frequency | 1MHz-enables use of small 0.22µF ceramic pump capacitor and 2.2µF input/output capacitors |
| Output Ripple | 40mVp-p at 50mA load with COUT = 2.2µF, ESR < 0.1Ω |
| 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 automatically at 140°C |
Pinout & Package
REG711EA-3.3/2K5 is housed in an 8-pin VSSOP (MSOP-8) package (DGK drawing), 3.0mm × 3.0mm × 1.05mm profile, RoHS-compliant, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must be left floating or grounded per layout guidelines |
| 2 (ENABLE) | Logic Control Input | Active-high enable: ≥1.3V enables regulation; ≤0.4V enters <2µA shutdown mode |
| 3 (VIN) | Main Power Input | Accepts 1.8–5.5V unregulated source; supplies charge pump and internal circuitry |
| 4 (GND) | Analog Ground Reference | Low-noise reference for control circuitry; separate from PGND to minimize noise coupling |
| 5 (VOUT) | Regulated Output | Delivers stable 3.3V ±3% to load; requires 2.2µF ceramic capacitor (X7R/X5R) close to pin |
| 6 (CPUMP+) | Charge Pump Positive Terminal | Connects to positive side of 0.22µF ceramic pump capacitor (CPUMP) |
| 7 (CPUMP−) | Charge Pump Negative Terminal | Connects to negative side of CPUMP; forms flying capacitor path for voltage doubling/halving |
| 8 (PGND) | Power Ground Return | High-current return path for VIN and VOUT; star-grounded at pin 5 to minimize ripple |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless Operation | Eliminates EMI-prone magnetics and saves PCB area-ideal for ultra-thin smart card readers and PCMCIA cards |
| Auto Buck/Boost Mode Switching | Maintains regulation whether VIN is above or below 3.3V (switches at ~4.0V), enabling single-supply flexibility across battery chemistries |
| Low-Ripple Output | 40mVp-p ripple at full 50mA load ensures clean power for sensitive analog circuits in handheld meters and LCD displays |
| Ultra-Low Shutdown Current | <2µA shutdown draw extends shelf life and standby time in battery-powered modems and PDAs |
| Integrated Protection | Thermal shutdown (160°C) and current limiting prevent damage during fault conditions-no external circuitry required |
| Small Footprint | VSSOP-8 (3.0×3.0mm) fits tight layouts in electronic games and SIM card modules where board space is premium |
Applications
| Smart Card Readers | Cellular Phones |
|---|---|
|
Use Scenario: Powering ISO 7816-compliant contact-based smart cards requiring stable 3.3V from variable battery sources. IC Role / Device Role / Timing Role: Regulated 3.3V supply IC managing voltage conversion and transient load response during card insertion/removal. Use Value: Maintains regulation across 1.8–5.5V input swing (e.g., aging Li-ion), eliminates need for discrete LDO + boost stages, reducing BOM count by 2–3 components. |
Use Scenario: Supplying 3.3V to baseband processors or RF front-end ICs in feature phones with dual-battery configurations. IC Role / Device Role / Timing Role: Primary DC/DC converter providing efficient, low-noise 3.3V rail during call and standby modes. Use Value: 60µA quiescent current extends standby time; 1MHz switching avoids interference with GSM/EDGE bands; MSOP-8 eases placement near antenna modules. |
| SIM Card Supplies | Handheld Meters |
|
Use Scenario: Delivering compliant 3.3V power to embedded SIM (eSIM) modules in IoT trackers and wearables. IC Role / Device Role / Timing Role: Dedicated SIM supply regulator with fast load transient response to handle SIM activation bursts. Use Value: 40mVp-p ripple meets ETSI TR 102 212 requirements; shutdown mode (<2µA) enables remote wake-up via enable pin without battery drain. |
Use Scenario: Powering precision ADCs, op-amps, and LCD drivers in portable multimeters and environmental sensors. IC Role / Device Role / Timing Role: Low-noise, high-stability 3.3V source ensuring measurement accuracy under varying battery voltage. Use Value: Output voltage drift <±0.5% over –40°C to +85°C ensures calibration stability; thermal shutdown prevents overheating during extended field use. |
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; no 3.3V variant; 100mA output; requires two 10µF pump caps | Not suitable for 3.3V systems; higher output current but larger footprint and higher ripple (60mVp-p) | Select only if 5V output and >50mA load are required; not drop-in for REG711EA-3.3/2K5 |
| TLC7660IDR | Inverting charge pump (VOUT = –VIN); no regulation; ±10% output tolerance; 20mA max | Cannot replace REG711EA-3.3/2K5 in positive 3.3V supply roles; limited to inverting bias applications | Use only for generating negative rails-not a functional alternative for regulated 3.3V generation |
Compared with MAX680ESA+ and TLC7660IDR, REG711EA-3.3/2K5 uniquely delivers tightly regulated 3.3V output across 1.8–5.5V input with integrated protection, making it the only viable choice for battery-powered 3.3V systems requiring reliability, low ripple, and minimal external components.
Availability
REG711EA-3.3/2K5 is available at Aetrix Electronics and suitable for smart card readers, cellular phone subsystems, and handheld meter designs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for REG711EA-3.3/2K5 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 digital signal solutions, with decades of expertise in power management ICs for portable and industrial applications.
The REG711 family was designed specifically for low-power, inductorless DC/DC conversion in space-constrained battery-operated devices-including smart cards, SIM modules, and handheld instrumentation-prioritizing efficiency, small size, and robust protection.
FAQ
What is the minimum input voltage required for REG711EA-3.3/2K5 to start up and regulate?
The REG711EA-3.3/2K5 guarantees startup and regulation down to 1.8V input across its full operating temperature range (–40°C to +85°C). At light loads, it can maintain regulation even below 1.8V, but 1.8V is the specified minimum for guaranteed 3.3V output at up to 50mA. This makes REG711EA-3.3/2K5 compatible with deeply discharged single-cell Li-ion batteries and two-cell NiMH packs.
Can REG711EA-3.3/2K5 be used in place of an LDO for better efficiency?
Yes-REG711EA-3.3/2K5 achieves up to 90% efficiency at 15mA load with VIN = 2.7V, far exceeding typical LDO efficiency (e.g., ~55% for 2.7V→3.3V). Unlike LDOs, it operates in boost mode when VIN < 3.3V and buck mode when VIN > 3.3V. However, it requires two external capacitors (CIN, CPUMP) and generates switching noise, so REG711EA-3.3/2K5 is best where efficiency and input range outweigh strict noise requirements.
What capacitor types and values are mandatory for stable operation of REG711EA-3.3/2K5?
For stable, low-ripple operation, REG711EA-3.3/2K5 requires ceramic capacitors with X7R or X5R dielectric: CIN = 2.2µF, COUT = 2.2µF, and CPUMP = 0.22µF-all in 1206 case size. Tantalum or electrolytic capacitors are not recommended due to higher ESR, which increases output ripple beyond the specified 40mVp-p. All capacitors must be placed within 2mm of their respective pins per TI layout guidelines.
Does REG711EA-3.3/2K5 support automatic mode switching between buck and boost?
Yes-REG711EA-3.3/2K5 automatically switches between step-down (buck) and step-up (boost) modes based on input voltage. For the 3.3V version, it transitions from boost to buck mode at approximately VIN = 4.0V. This seamless transition maintains regulation without external control, enabling single-supply operation across diverse battery chemistries-from 1.8V (nearly depleted alkaline) to 5.5V (fresh Li-ion).
What is the thermal resistance (θJA) and maximum junction temperature for REG711EA-3.3/2K5?
The REG711EA-3.3/2K5 in VSSOP-8 package has a thermal resistance θJA of 150°C/W. Its absolute maximum junction temperature is +150°C, with thermal shutdown activating at +160°C and automatic recovery at +140°C. To stay within safe operating limits at 50mA load, ensure adequate copper pour on PGND and avoid enclosing the device in sealed enclosures without airflow-especially in handheld meters operating at +85°C ambient.
REG711EA-3.3/2K5 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:
- Obsolete
- 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-3.3/2K5 FAQ
1.How can I place an order for REG711EA-3.3/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG711EA-3.3/2K5 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-3.3/2K5 reliable?
The price and inventory of REG711EA-3.3/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG711EA-3.3/2K5 is usually 5 days.
3.What payment methods are accepted for REG711EA-3.3/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG711EA-3.3/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG711EA-3.3/2K5?
REG711EA-3.3/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG711EA-3.3/2K5 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-3.3/2K5?
For technical support, including REG711EA-3.3/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG711EA-3.3/2K5 requirements.
6.How does Aetrix verify that REG711EA-3.3/2K5 is sourced from the original manufacturer or authorized distributors?
All REG711EA-3.3/2K5 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-3.3/2K5 meets industry standards.
7.What is the process for return or replacement of REG711EA-3.3/2K5?
All REG711EA-3.3/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with REG711EA-3.3/2K5, 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-3.3/2K5 part is unused and in its original packaging.
Return procedure for REG711EA-3.3/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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