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Texas Instruments REG711EA-2.7/2K5
- Part No.:
- REG711EA-2.7/2K5
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REG711EA-2.7/2K5.pdf
- Description:
- IC REG CHG PUMP 2.7V 50MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,034
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Product details
Overview
REG711EA-2.7/2K5 from Texas Instruments is a 50mA switched-capacitor DC/DC converter delivering a regulated 2.7V output from input voltages ranging 1.8V–5.5V, supporting automatic step-up/step-down operation without inductors, featuring 1MHz internal oscillator, <1µA shutdown current, and thermal/current protection - used in SIM card supplies and portable communication devices.
For engineers reviewing the REG711EA-2.7/2K5 datasheet, REG711EA-2.7/2K5 pinout, REG711EA-2.7/2K5 application, or REG711EA-2.7/2K5 equivalent, key selection criteria include input voltage range compatibility (1.8V–5.5V), 2.7V ±3% output tolerance at 50mA, MSOP-8 package footprint, enable-controlled shutdown mode, and low-noise capacitor-based topology for space-constrained battery-powered systems.
Technical Context
The REG711EA-2.7/2K5 operates as a regulated charge pump with automatic mode switching: it functions in buck mode when VIN > 3.4V and boost mode when VIN < 3.4V, maintaining regulation across both regions. Its internal 1MHz oscillator enables use of small 0.22µF pump and 2.2µF input/output ceramic capacitors.
It integrates peak current limiting to reduce EMI and input/output ripple, thermal shutdown at 160°C with 140°C recovery, and overcurrent protection delivering up to 80mA short-circuit current. Quiescent current is 60µA at no load and <2µA in shutdown, supporting ultra-low-power portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.7V ±3% (2.57V–2.83V) at 50mA load; ensures stable supply for 2.7V logic rails and SIM interfaces. |
| Input Voltage Range | 1.8V–5.5V; supports single-cell Li-ion (2.7–4.2V), two-cell NiMH (2.0–2.8V), and three-cell alkaline (3.0–4.5V) batteries. |
| Max Output Current | 50mA continuous; sufficient for smart card readers, PCMCIA peripherals, and low-power LCD bias supplies. |
| Switching Frequency | 1MHz fixed; allows compact 0.22µF CPUMP and 2.2µF CIN/COUT ceramic capacitors, minimizing board area. |
| Output Ripple | 40mVP-P at 50mA; meets noise-sensitive analog and RF subsystem requirements without additional filtering. |
| Shutdown Current | <2µA; extends battery life in standby modes of handheld meters and PDA accessories. |
| Operating Temp | –40°C to +85°C; qualified for industrial and consumer portable equipment environments. |
Pinout & Package
REG711EA-2.7/2K5 is housed in an 8-pin MSOP (VSSOP-DGK) package, 3.0mm × 3.0mm × 1.0mm profile, RoHS-compliant, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NC | No Connect | Unbonded pad; must remain floating - no PCB trace or copper pour connection. |
| 2 - ENABLE | Digital Control Input | Active-high logic control: ≥1.3V enables regulation; ≤0.4V places device in <2µA shutdown state. |
| 3 - VIN | Power Input | Accepts 1.8V–5.5V unregulated source; requires local 2.2µF ceramic decoupling within 2mm. |
| 4 - GND | Analog Ground Reference | Low-impedance return for control circuitry; separate from PGND to minimize noise coupling. |
| 5 - VOUT | Regulated Output | Delivers 2.7V ±3% at up to 50mA; requires 2.2µF ceramic output capacitor placed adjacent to pin. |
| 6 - CPUMP+ | Charge Pump Positive Terminal | Connects to positive plate of 0.22µF pump capacitor; high-frequency switching node requiring tight layout. |
| 7 - CPUMP− | Charge Pump Negative Terminal | Connects to negative plate of 0.22µF pump capacitor; returns to PGND via shortest possible path. |
| 8 - PGND | Power Ground Return | High-current return for pump and output stages; star-connected to VIN and VOUT capacitors' ground pads. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless architecture | Eliminates magnetic components and EMI filters - reduces BOM cost and PCB area by >30% vs. inductive DC/DC converters. |
| Auto step-up/step-down mode | Seamlessly transitions between buck and boost operation at VIN ≈ 3.4V, enabling single-supply operation across full battery discharge curve. |
| Low input/output ripple | Peak current limiting and 1MHz switching yield <40mVP-P output ripple at 50mA, suitable for noise-sensitive analog circuits. |
| Thermal & current protection | Shuts down at 160°C junction temperature and limits output current to 80mA during fault, preventing damage to IC or load. |
| Ultra-low quiescent current | 60µA at no load and <2µA in shutdown - extends operational time in battery-backed smart card and modem applications. |
Applications
| Smart Card Readers | SIM Card Supplies |
|---|---|
Use Scenario: Powering ISO 7816-compliant contact smart cards in point-of-sale terminals and access control readers. IC Role / Device Role / Timing Role: Provides tightly regulated 2.7V supply independent of host battery voltage decay, ensuring reliable card reset and data exchange. Use Value: Maintains 2.7V ±3% under dynamic load steps (0–50mA) and input drop to 1.8V, eliminating need for external LDO post-regulation. |
Use Scenario: Supplying 2.7V power to subscriber identity module (SIM) cards in GSM/GPRS cellular handsets and IoT modules. IC Role / Device Role / Timing Role: Acts as primary SIM interface regulator, enabled only during active communication to minimize standby current. Use Value: Delivers <2µA shutdown current and fast wake-up (<10µs), extending battery life in always-connected mobile devices. |
| Portable Communication Devices | Handheld Meters |
Use Scenario: Powering baseband processors and RF front-ends in Bluetooth headsets, DECT phones, and wireless audio transceivers. IC Role / Device Role / Timing Role: Generates clean 2.7V rail from varying single-cell Li-ion input (3.0–4.2V), rejecting ripple from digital switching noise. Use Value: 1MHz operation and ceramic capacitor compatibility suppress conducted EMI, easing EMC certification for Class 1 devices. |
Use Scenario: Supplying precision analog front-end (AFE) and microcontroller in portable multimeters and environmental sensors. IC Role / Device Role / Timing Role: Serves as low-noise, low-drift 2.7V reference source for ADC bias and sensor excitation. Use Value: Output voltage drift <±0.5% over –40°C to +85°C ensures measurement accuracy without calibration compensation. |
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; requires dual-polarity pump caps; no enable pin; ±1.5% initial accuracy. | Limited to 5V-only systems; lacks shutdown control and wide-input flexibility of REG711EA-2.7/2K5. | Select when 5V rail and higher current are required, and input voltage remains >3.0V. |
| TPS60403DBVR | 2.5V output; 60mA; integrated soft-start; 1.2MHz switching; same MSOP-8 package; 92% peak efficiency. | Optimized for 2.5V logic; slightly higher efficiency but narrower input range (1.6–5.5V) and no thermal shutdown. | Prefer for new 2.5V designs where soft-start and marginally better efficiency outweigh missing thermal protection. |
Compared with MAX680ESA+ and TPS60403DBVR, REG711EA-2.7/2K5 uniquely combines 2.7V output, 1.8V minimum input, integrated thermal/current protection, and sub-2µA shutdown - making it optimal for battery-powered 2.7V SIM and smart card applications demanding robustness and ultra-low standby power.
Availability
REG711EA-2.7/2K5 is available at Aetrix Electronics and suitable for smart card readers, SIM card supplies, and handheld meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for REG711EA-2.7/2K5 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 technologies, with over 90 years of innovation in high-reliability electronic components.
The REG711 family was designed specifically for low-noise, inductorless DC/DC conversion in space-constrained portable electronics - targeting battery-powered applications needing regulated outputs from highly variable input sources.
FAQ
What is the minimum input voltage required for REG711EA-2.7/2K5 to start regulation?
The REG711EA-2.7/2K5 guarantees startup at 1.8V input across the full operating temperature range. It maintains regulation down to 2.0V input at 50mA load, as specified in the "OUTPUT VOLTAGE" table under IOUT ≤ 50mA conditions. Below 2.0V, output voltage drops out of regulation, but the device remains functional and resumes regulation once VIN rises above threshold.
Can REG711EA-2.7/2K5 be used with tantalum capacitors instead of ceramic?
No - REG711EA-2.7/2K5 requires low-ESR ceramic capacitors (X7R/X5R dielectric) for CIN, COUT, and CPUMP. Tantalum capacitors exhibit higher ESR, which increases output voltage ripple beyond the specified 40mVP-P and may cause instability or reduced efficiency. The datasheet explicitly recommends ceramic types and warns against leaded or high-inductance packages.
Does REG711EA-2.7/2K5 support true shutdown disconnect between VIN and VOUT?
Yes - when the ENABLE pin is pulled low (≤0.4V), REG711EA-2.7/2K5 enters shutdown mode with <2µA supply current and physically disconnects VOUT from VIN. The output is actively clamped to near-zero voltage, preventing backfeed and ensuring zero-load leakage - critical for battery isolation in always-on portable systems.
What is the thermal resistance θJA for REG711EA-2.7/2K5 in its MSOP-8 package?
The junction-to-ambient thermal resistance (θJA) for REG711EA-2.7/2K5 in the MSOP-8 (DGK) package is 150°C/W, measured under standard JEDEC test conditions (single-layer 1-in² copper pad). This value assumes minimal PCB copper; adding thermal vias and extended ground planes can reduce effective θJA by up to 40%, improving power handling at elevated ambient temperatures.
How does REG711EA-2.7/2K5 switch between buck and boost modes?
REG711EA-2.7/2K5 automatically switches modes based on input voltage: it operates in buck (step-down) mode when VIN > 3.4V and boost (step-up) mode when VIN < 3.4V. Internal control logic monitors VIN relative to VOUT and reconfigures FET switching states (Q1–Q4) without external intervention - ensuring seamless regulation across the entire 1.8V–5.5V input range.
REG711EA-2.7/2K5 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):
- 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-2.7/2K5 FAQ
1.How can I place an order for REG711EA-2.7/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG711EA-2.7/2K5 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-2.7/2K5 reliable?
The price and inventory of REG711EA-2.7/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG711EA-2.7/2K5 is usually 5 days.
3.What payment methods are accepted for REG711EA-2.7/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG711EA-2.7/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG711EA-2.7/2K5?
REG711EA-2.7/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG711EA-2.7/2K5 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-2.7/2K5?
For technical support, including REG711EA-2.7/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG711EA-2.7/2K5 requirements.
6.How does Aetrix verify that REG711EA-2.7/2K5 is sourced from the original manufacturer or authorized distributors?
All REG711EA-2.7/2K5 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-2.7/2K5 meets industry standards.
7.What is the process for return or replacement of REG711EA-2.7/2K5?
All REG711EA-2.7/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with REG711EA-2.7/2K5, 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-2.7/2K5 part is unused and in its original packaging.
Return procedure for REG711EA-2.7/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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