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Texas Instruments REG711EA-2.7/250
- Part No.:
- REG711EA-2.7/250
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REG711EA-2.7/250.pdf
- Description:
- IC REG CHG PUMP 2.7V 50MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,674
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Product details
Overview
REG711EA-2.7/250 from Texas Instruments is a 50mA switched-capacitor DC/DC converter delivering a regulated 2.7V output from 1.8V–5.5V input, featuring automatic step-up/step-down operation, 1MHz internal oscillator, <40mVp-p output ripple at 50mA, and thermal/current protection in an MSOP-8 package. It enables compact, inductorless power for low-voltage portable electronics.
For engineers reviewing the REG711EA-2.7/250 datasheet, REG711EA-2.7/250 pinout, REG711EA-2.7/250 application, or REG711EA-2.7/250 equivalent, key selection criteria include input voltage range compatibility (1.8V–5.5V), 2.7V ±3% output tolerance at 50mA, shutdown current <2µA, thermal shutdown at 160°C, and MSOP-8 footprint with PGND/GND separation for low-noise layout.
Technical Context
The REG711EA-2.7/250 operates in automatic buck-boost mode: it functions as a step-down regulator when VIN > 3.4V and switches to step-up when VIN < 3.4V, maintaining regulation without external inductors. Its charge-pump architecture uses a 1MHz oscillator and internal FETs (Q1–Q4) controlled by pulse-skipping to regulate output voltage.
It integrates peak current limiting to reduce EMI and input current ripple, employs separate PGND and GND pins to isolate high-ripple pump paths from sensitive analog ground, and provides thermal shutdown recovery at 140°C after junction temperature exceeds 160°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.7V ±3% (2.57V–2.83V) at 50mA load; stable across input range 2.0V–5.5V |
| Max Output Current | 50mA continuous; short-circuit current limited to 80mA |
| Input Voltage Range | 1.8V–5.5V; guaranteed startup down to 2.0V for 2.7V version |
| Switching Frequency | 1MHz fixed oscillator; enables use of small 0.22µF ceramic CPUMP and 2.2µF CIN/COUT |
| Output Ripple | <40mVp-p at 50mA with 2.2µF X7R ceramic COUT and ESR <0.1Ω |
| Quiescent Current | 60µA typical at no load; <2µA in shutdown mode |
| Thermal Shutdown | Activates at 160°C junction temperature; recovers automatically at 140°C |
Pinout & Package
REG711EA-2.7/250 is housed in an 8-pin MSOP (VSSOP-DGK) package with 0.65mm pitch, 3mm × 3mm body, and height <1.1mm - optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No Connect | Unbonded; 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 |
| 4 GND | Analog Ground Reference | Low-noise reference for control circuitry; separate from PGND |
| 5 VOUT | Regulated Output | Delivers 2.7V ±3% to load; requires 2.2µF ceramic COUT close to pin |
| 6 CPUMP+ | Charge Pump Positive Terminal | Connects to + terminal of 0.22µF ceramic CPUMP capacitor |
| 7 CPUMP− | Charge Pump Negative Terminal | Connects to − terminal of 0.22µF ceramic CPUMP; forms flying capacitor path |
| 8 PGND | Power Ground Return | High-ripple return path for pump and output currents; star-grounded at this pin |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless Architecture | Eliminates magnetic components and EMI concerns; reduces BOM count and board area |
| Automatic Buck-Boost Mode Switching | Seamlessly transitions between step-down and step-up based on VIN vs. VOUT (switch point = 3.4V for 2.7V version) |
| Low-Noise PGND/GND Separation | Minimizes coupling of switching transients into control circuitry; improves PSRR and stability |
| Integrated Peak Current Limit | Reduces input current spikes and output ripple; lowers EMI without external compensation |
| Ultra-Low Shutdown Current | <2µA supply current in shutdown enables long battery life in standby modes |
Applications
| Smart Card Readers | Cellular Phones |
|---|---|
Use Scenario: Powering ISO 7816-compliant smart card interface circuitry from single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Provides clean, regulated 2.7V supply to card VCC pin while tolerating battery discharge from 3.0V to 2.0V. Use Value: Eliminates need for discrete LDO + boost converter combo; maintains regulation during deep battery sag without brownout. | Use Scenario: Supplying 2.7V bias to SIM card slot and baseband peripheral logic in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Acts as dedicated SIM power rail generator with fast transient response and low quiescent current. Use Value: Enables SIM hot-swap support and extends standby time via sub-2µA shutdown current. |
| PCMCIA Cards | LCD Displays |
Use Scenario: Generating 2.7V for PCMCIA Type II card logic and interface buffers in portable computing devices. IC Role / Device Role / Timing Role: Delivers stable 2.7V from variable host bus voltage (3.3V or 5V) or battery input. Use Value: Supports dual-supply PCMCIA cards without requiring external level-shifting or discrete regulators. | Use Scenario: Powering segment drivers and controller logic in monochrome or color STN/TFT LCD modules. IC Role / Device Role / Timing Role: Supplies low-noise 2.7V VDD to LCD driver ICs with minimal ripple-induced display flicker. Use Value: Achieves <40mVp-p ripple using only ceramic capacitors - avoids tantalum ESR-related brightness variation. |
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; no adjustable versions; 100mA output; requires two 10µF flying caps | Not suitable for 2.7V systems; higher output current but less flexible input range (±4.5V min) | Select only if 5V output and higher current are required; not drop-in for 2.7V rail |
| TPS60403DBVR | 2.5V fixed output; 60mA; 1.3MHz switching; integrated soft-start; same MSOP-8 package | 2.5V vs. 2.7V output; tighter initial accuracy (±1.5%) but narrower input range (1.6V–5.5V) | Valid alternative for 2.5V systems; requires validation of 0.2V output offset impact on load |
Compared with REG711EA-2.7/250, MAX680ESA+ delivers higher current but lacks 2.7V output and flexible buck-boost operation, while TPS60403DBVR offers better accuracy and soft-start but targets 2.5V systems - neither is pin-compatible, and both require schematic and layout review for substitution.
Availability
REG711EA-2.7/250 is available at Aetrix Electronics and suitable for smart card readers, cellular phone SIM supplies, and portable communication devices requiring stable component supply, RoHS-compliant packaging, and tape-and-reel delivery for automated assembly.
Supply support for REG711EA-2.7/250 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 battery-operated system design.
The REG711 product line was engineered specifically for ultra-compact, inductorless DC/DC conversion in space- and power-sensitive portable electronics - targeting applications where battery voltage varies across the output rail and EMI must be minimized.
FAQ
What is the minimum input voltage required for REG711EA-2.7/250 to start up and regulate?
The REG711EA-2.7/250 guarantees startup with input voltages as low as 2.0V when supplying up to 50mA. This is specified in the "INPUT VOLTAGE" table under "All Other Models" with conditions of IOUT ≤ 50mA and VIN > 2.0V. Below 2.0V, regulation cannot be assured even at light loads.
Does REG11EA-2.7/250 require external compensation components?
No, the REG711EA-2.7/250 is fully internally compensated. It requires only three external ceramic capacitors: 2.2µF CIN, 2.2µF COUT, and 0.22µF CPUMP - all placed close to their respective pins. No resistors, feedback dividers, or compensation networks are needed.
Can REG711EA-2.7/250 operate with input voltage equal to its 2.7V output?
Yes, the REG711EA-2.7/250 supports VIN = VOUT operation. Its automatic buck-boost architecture seamlessly handles input voltages both above and below 2.7V - including exactly 2.7V - while maintaining regulation and efficiency, as confirmed in the "MAXIMUM LOAD CURRENT vs INPUT VOLTAGE" curve.
What is the thermal resistance (θJA) of the REG711EA-2.7/250 in its MSOP-8 package?
The REG711EA-2.7/250 has a junction-to-ambient thermal resistance (θJA) of 150°C/W when mounted on a standard JEDEC 2-layer PCB with no copper pour. This value assumes the recommended layout with short traces and proper PGND star grounding at pin 8.
Is REG711EA-2.7/250 compatible with ceramic capacitors only, or can tantalum be used?
The REG711EA-2.7/250 is optimized for ceramic capacitors (X7R/X5R dielectric). Tantalum capacitors are discouraged for COUT due to higher ESR (>0.1Ω), which increases output ripple beyond the specified 40mVp-p. Ceramic types ensure stable regulation and meet the ESR requirement stated in Note (1) of the datasheet.
REG711EA-2.7/250 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:
- 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):
- 2.7V
- 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-2.7/250 FAQ
1.How can I place an order for REG711EA-2.7/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG711EA-2.7/250 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-2.7/250 reliable?
The price and inventory of REG711EA-2.7/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG711EA-2.7/250 is usually 5 days.
3.What payment methods are accepted for REG711EA-2.7/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG711EA-2.7/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG711EA-2.7/250?
REG711EA-2.7/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG711EA-2.7/250 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-2.7/250?
For technical support, including REG711EA-2.7/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG711EA-2.7/250 requirements.
6.How does Aetrix verify that REG711EA-2.7/250 is sourced from the original manufacturer or authorized distributors?
All REG711EA-2.7/250 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-2.7/250 meets industry standards.
7.What is the process for return or replacement of REG711EA-2.7/250?
All REG711EA-2.7/250 units undergo pre-shipment inspection (PSI). If there is an issue with REG711EA-2.7/250, 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-2.7/250 part is unused and in its original packaging.
Return procedure for REG711EA-2.7/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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