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Texas Instruments REG711EA27250G4
- Part No.:
- REG711EA27250G4
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REG711EA27250G4.pdf
- Description:
- IC REG CHG PUMP 2.7V 50MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,076
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Product details
Overview
REG711EA27250G4 from Texas Instruments is a 50mA switched-capacitor DC/DC converter delivering a regulated 2.7V output from 1.8V–5.5V input, operating in automatic step-up or step-down mode without inductors. It features 1MHz internal oscillator, <40mVp-p output ripple at 50mA load, and thermal/current protection-used in SIM card supplies and portable communication devices.
For engineers reviewing the REG711EA27250G4 datasheet, REG711EA27250G4 pinout, REG711EA27250G4 application, or REG711EA27250G4 equivalent, key selection criteria include input voltage range compatibility (1.8V–5.5V), 2.7V fixed output tolerance (±5%), MSOP-8 package footprint, shutdown current (<2µA), and absence of magnetic components for low-EMI designs.
Technical Context
The REG711EA27250G4 implements automatic mode switching between buck and boost operation based on VIN relative to VOUT: it operates in step-down mode when VIN > ~3.4V and step-up mode when VIN < ~3.4V. Internal 1MHz oscillator enables use of small 0.22µF pump and 2.2µF input/output ceramic capacitors.
It integrates thermal shutdown (trip at 160°C, recovery at 140°C) and current limiting (80mA short-circuit capability), with quiescent current of 60µA at no load and <2µA in shutdown. Ground pin current remains stable across –40°C to +85°C operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.7V ±5% (2.57V–2.83V) at 50mA load; tight regulation enables stable power for low-voltage logic and memory 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) battery sources |
| Max Output Current | 50mA continuous; sufficient for SIM cards, smart card readers, and low-power LCD bias rails |
| Oscillator Frequency | 1.0MHz; allows use of compact 0.22µF CPUMP and 2.2µF CIN/COUT ceramic capacitors, minimizing board area |
| Output Ripple | ≤40mVp-p at 50mA; achieved with low-ESR ceramic capacitors and integrated peak current reduction circuitry |
| Shutdown Current | <2µA; enables ultra-low-power sleep states in battery-operated handheld meters and PCMCIA cards |
| Operating Temperature | –40°C to +85°C; qualified for industrial and portable consumer applications including modems and PDAs |
Pinout & Package
REG711EA27250G4 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 | Unused pin; must be left floating or tied to GND per layout guidelines to avoid noise coupling |
| 2 ENABLE | Logic Control Input | Active-high enable; 1.3V min high threshold, 0.4V max low threshold; controls entry into <2µA shutdown mode |
| 3 VIN | Main Power Input | Accepts 1.8V–5.5V unregulated source; connects to 2.2µF input capacitor to suppress high-frequency ripple |
| 4 GND | Analog Ground Reference | Primary ground return for control circuitry; requires star-point connection near PGND to minimize noise |
| 5 VOUT | Regulated Output | Delivers stable 2.7V ±5%; connects to 2.2µF output capacitor; trace routing must minimize inductance |
| 6 CPUMP+ | Charge Pump Positive Terminal | Drives 0.22µF flying capacitor during boost phase; paired with CPUMP– to form charge transfer path |
| 7 CPUMP– | Charge Pump Negative Terminal | Completes flying capacitor loop; both CPUMP pins carry high-frequency switching current |
| 8 PGND | Power Ground Return | High-current ground return for switching paths; must be connected directly to GND via low-inductance route |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless Architecture | Eliminates magnetic components and associated EMI, enabling compact, low-profile layouts for handheld devices |
| Auto Buck-Boost Mode Switching | Seamlessly transitions between step-down and step-up operation without external control-ideal for varying battery voltages |
| Low Quiescent Current | 60µA at no load and <2µA in shutdown-extends battery life in always-on SIM card and modem standby modes |
| Integrated Protection | Thermal shutdown (160°C trip) and current limit (80mA short-circuit) prevent damage during fault conditions |
| Small Capacitor Support | 1MHz oscillator allows 0.22µF CPUMP and 2.2µF CIN/COUT-reducing BOM cost and PCB area vs. lower-frequency charge pumps |
Applications
| Smart Card Readers | SIM Card Supplies |
|---|---|
|
Use Scenario: Powering ISO/IEC 7816-compliant contact-based smart cards in point-of-sale terminals and access control systems. IC Role / Device Role / Timing Role: Provides regulated 2.7V supply to card interface ICs; handles input voltage sag during card insertion and transient load spikes. Use Value: Maintains stable 2.7V output across 1.8V–5.5V input range, ensuring reliable card reset and communication without external LDO post-regulation. |
Use Scenario: Supplying 2.7V to subscriber identity module (SIM) cards in cellular handsets and IoT modules. IC Role / Device Role / Timing Role: Delivers clean, low-noise 2.7V rail during RF transmission bursts and deep-sleep wake-up cycles. Use Value: <2µA shutdown current minimizes battery drain during idle periods; 40mVp-p ripple avoids data corruption on SIM I/O lines. |
| Portable Communication Devices | Handheld Meters |
|
Use Scenario: Powering baseband processors and RF front-end bias in Bluetooth headsets and DECT cordless phones. IC Role / Device Role / Timing Role: Acts as primary DC/DC converter replacing linear regulators; manages dynamic load steps up to 50mA. Use Value: 90% efficiency at 15mA load extends talk time; MSOP-8 footprint fits narrow PCBs in compact enclosures. |
Use Scenario: Supplying precision analog front-end and microcontroller in battery-powered multimeters and environmental sensors. IC Role / Device Role / Timing Role: Generates stable 2.7V reference rail for ADCs and op-amps; maintains regulation during cold-temperature battery discharge. Use Value: ±5% output tolerance and <0.6% output drift over –40°C to +85°C ensure measurement accuracy without calibration drift. |
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 |
|---|---|---|---|
| MAX881REUA+T | 2.7V output, 50mA, µMAX-8 package; requires external resistors for feedback; higher 100µA quiescent current | Lacks auto buck-boost; limited to step-down only below 3.6V input; less suitable for wide-input battery systems | Prefer REG711EA27250G4 when input voltage may fall below 2.7V or when ultra-low IQ is critical |
| TPS60403DBVR | 2.5V output, 60mA, SOT-23-6; fixed 2.5V (not 2.7V); 1.2MHz switching; 2.7V–6.0V input range | Higher minimum input (2.7V) prevents operation from partially discharged batteries; different pinout and footprint | Choose REG711EA27250G4 for true 2.7V output, wider 1.8V startup, and MSOP-8 compatibility with existing layouts |
Compared with MAX881REUA+T and TPS60403DBVR, REG711EA27250G4 uniquely combines 2.7V fixed output, 1.8V startup capability, auto buck-boost operation, and <2µA shutdown current in an industry-standard MSOP-8 package-making it optimal for SIM card and smart card power where input voltage varies widely and space is constrained.
Availability
REG711EA27250G4 is available at Aetrix Electronics and suitable for SIM card supplies, smart card readers, and handheld meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for REG711EA27250G4 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 company specializing in analog and embedded processing technologies, with decades of leadership in power management ICs.
The REG711 family was designed specifically for low-noise, inductorless DC/DC conversion in battery-powered portable electronics-targeting applications where board space, EMI, and battery life are critical constraints.
FAQ
What is the exact output voltage tolerance of REG711EA27250G4 under full load?
The REG711EA27250G4 delivers 2.7V output with ±5% tolerance (2.57V to 2.83V) at 50mA load and input voltage between 2.0V and 5.5V. This specification is guaranteed across the full –40°C to +85°C operating temperature range and ensures compatibility with 2.7V-tolerant logic and memory interfaces used in SIM cards and smart card readers.
Does REG711EA27250G4 require external feedback resistors to set its output voltage?
No, REG711EA27250G4 is a fixed-output device with factory-trimmed 2.7V regulation-no external resistors or compensation components are needed. Its internal feedback network eliminates design complexity and layout sensitivity, distinguishing it from adjustable charge pumps like the TPS60403 series.
Can REG711EA27250G4 operate with input voltage below its output voltage?
Yes, REG711EA27250G4 automatically switches to boost mode when input voltage falls below approximately 3.4V, enabling regulation down to 1.8V input. This buck-boost capability ensures uninterrupted 2.7V output during battery discharge in handheld meters and portable modems.
What is the recommended capacitor type and value for CPUMP in REG711EA27250G4?
Texas Instruments specifies a 0.22µF X7R or X5R ceramic capacitor for CPUMP in REG711EA27250G4, mounted as close as possible to pins 6 (CPUMP+) and 7 (CPUMP–). Leaded or tantalum capacitors are not recommended due to higher ESR and inductance, which increase output ripple and reduce efficiency.
Is REG711EA27250G4 pin-compatible with other variants in the REG711 family?
Yes, all REG711 variants-including REG711EA-2.5, REG711EA-3.3, and REG711EA-5.0-share identical MSOP-8 (DGK) pinout and package dimensions. This allows drop-in replacement across output voltages without PCB redesign, provided external capacitors are verified for each VOUT variant's ripple and stability requirements.
REG711EA27250G4 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
REG711EA27250G4 FAQ
1.How can I place an order for REG711EA27250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG711EA27250G4 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 REG711EA27250G4 reliable?
The price and inventory of REG711EA27250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG711EA27250G4 is usually 5 days.
3.What payment methods are accepted for REG711EA27250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG711EA27250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG711EA27250G4?
REG711EA27250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG711EA27250G4 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 REG711EA27250G4?
For technical support, including REG711EA27250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG711EA27250G4 requirements.
6.How does Aetrix verify that REG711EA27250G4 is sourced from the original manufacturer or authorized distributors?
All REG711EA27250G4 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 REG711EA27250G4 meets industry standards.
7.What is the process for return or replacement of REG711EA27250G4?
All REG711EA27250G4 units undergo pre-shipment inspection (PSI). If there is an issue with REG711EA27250G4, 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 REG711EA27250G4 part is unused and in its original packaging.
Return procedure for REG711EA27250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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