My Inquiry
My Account
Texas Instruments REG711EA-2.5/2K5
- Part No.:
- REG711EA-2.5/2K5
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
REG711EA-2.5/2K5.pdf
- Description:
- IC REG CHG PUMP 2.5V 50MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,300
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
REG711EA-2.5/2K5 from Texas Instruments is a 50mA switched-capacitor DC/DC converter delivering a regulated 2.5V output with ±0.12V tolerance at 50mA load, operating from 1.8V–5.5V input, featuring automatic buck/boost mode switching and 1MHz internal oscillator. It serves as a compact, inductorless power supply for low-power portable systems requiring stable rail generation from single-cell batteries.
For engineers reviewing the REG711EA-2.5/2K5 datasheet, REG711EA-2.5/2K5 pinout, REG711EA-2.5/2K5 application, or REG711EA-2.5/2K5 equivalent, key selection criteria include input voltage range compatibility (1.8V–5.5V), 2.5V output accuracy (±4.8% over full load/temperature), shutdown current (<2µA), thermal protection (160°C trip), and MSOP-8 package footprint constraints.
Technical Context
The REG711EA-2.5/2K5 implements an auto-switching charge-pump architecture that dynamically selects buck or boost operation based on input-to-output voltage relationship-switching to boost mode when VIN < 3.2V and buck mode above that threshold. Its internal 1MHz oscillator enables use of small 0.22µF pump and 2.2µF input/output ceramic capacitors.
It integrates cycle-skipping regulation, peak current limiting to reduce EMI, thermal shutdown (160°C trip / 140°C recovery), and overcurrent protection. Quiescent current is 60µA at no load and drops to <2µA in shutdown, supporting battery-sensitive applications like SIM card supplies and handheld meters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V ±0.12V (±4.8%) at IOUT ≤ 50mA, VIN ≥ 2.0V - ensures stable logic-level rail for 2.5V I/O interfaces |
| Input Voltage Range | 1.8V to 5.5V - supports single Li-ion (2.7–4.2V), two alkaline (2.4–3.2V), or three NiMH (3.0–4.2V) cells without external adjustment |
| Max Output Current | 50mA continuous - sufficient for powering low-power microcontrollers, smart card ICs, or LCD bias circuits |
| Oscillator Frequency | 1.0MHz - enables use of 0201/0402-size ceramic capacitors, reducing board area vs. lower-frequency inductor-based solutions |
| Output Ripple | 40mVP-P at 50mA load with COUT = 2.2µF - meets noise requirements for analog sensors and RF front-end bias rails |
| Shutdown Current | <2µA - extends battery life in standby modes of portable communication devices and PCMCIA cards |
| Thermal Shutdown | 160°C junction temperature - protects device during sustained overload or poor PCB thermal design |
Pinout & Package
REG711EA-2.5/2K5 is housed in an 8-pin VSSOP (DGK) package, 3.0mm × 3.0mm × 1.0mm, with 0.65mm pitch and exposed thermal pad (PGND-connected). This thin, surface-mount package supports high-density portable designs and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NC | No Connect | Unbonded pin; must be left floating or grounded per layout guidelines - no electrical function |
| 2 - ENABLE | Logic Control Input | Active-high enable: >1.3V = ON, <0.4V = shutdown; draws <100nA - compatible with GPIOs of ultra-low-power MCUs |
| 3 - VIN | Main Power Input | Accepts 1.8V–5.5V unregulated source; supplies both charge pump and internal circuitry - requires local 2.2µF ceramic decoupling |
| 4 - GND | Analog Ground Reference | Reference node for internal control circuitry; must be star-connected to PGND near device to minimize noise coupling |
| 5 - VOUT | Regulated Output | Delivers 2.5V ±4.8% at up to 50mA; requires 2.2µF ceramic output capacitor - feeds downstream 2.5V logic or analog circuitry |
| 6 - CPUMP+ | Charge Pump Positive Terminal | Connects to positive plate of 0.22µF pump capacitor - forms flying capacitor network enabling voltage doubling/halving |
| 7 - CPUMP− | Charge Pump Negative Terminal | Connects to negative plate of 0.22µF pump capacitor - completes charge transfer path during switching cycles |
| 8 - PGND | Power Ground Return | High-current return path for pump and output stages; must be low-inductance connection to PCB ground plane or star point |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Buck/Boost Mode Switching | Seamlessly transitions between step-down and step-up operation at VIN ≈ 3.2V - eliminates need for external mode selection logic |
| No Inductor Required | Uses only ceramic capacitors (CIN, COUT, CPUMP) - reduces EMI, simplifies layout, and avoids inductor saturation risks |
| Low Quiescent Current | 60µA at no load and <2µA in shutdown - preserves battery capacity in always-on or intermittently active portable devices |
| Integrated Protection | Thermal shutdown (160°C) and current limiting (80mA short-circuit) - prevents damage during fault conditions without external components |
| Small MSOP-8 Footprint | 3.0mm × 3.0mm × 1.0mm body with 0.65mm pitch - fits space-constrained applications such as smart card readers and PCMCIA modules |
Applications
| Smart Card Readers | Portable Communication Devices |
|---|---|
|
Use Scenario: Powering ISO 7816-compliant smart card interface circuitry in handheld POS terminals and access control units. IC Role / Device Role / Timing Role: Provides clean, regulated 2.5V supply to card VCC pin under variable battery input (2.4–4.2V). Use Value: Eliminates need for discrete LDO + inductor-based DC/DC, reducing BOM count by 3–4 components while maintaining <40mV ripple. |
Use Scenario: Generating auxiliary 2.5V rail for Bluetooth/Wi-Fi baseband ICs and RF front-end bias in feature phones and IoT modems. IC Role / Device Role / Timing Role: Acts as primary DC/DC converter supplying power to 2.5V-tolerant transceivers during transmit bursts. Use Value: Delivers 50mA peak current with <2µA shutdown draw, extending talk time by 12–18% versus fixed-output LDO solutions. |
| LCD Displays | Handheld Meters |
|
Use Scenario: Biasing segment drivers and controller ICs in monochrome STN/TN LCD modules used in industrial test equipment. IC Role / Device Role / Timing Role: Supplies stable 2.5V reference for LCD contrast control and digital logic, rejecting input ripple from shared battery rail. Use Value: Maintains display contrast stability across 1.8–5.5V input range, eliminating visible flicker during battery discharge. |
Use Scenario: Powering precision ADCs, op-amps, and microcontroller peripherals in battery-operated multimeters and environmental sensors. IC Role / Device Role / Timing Role: Generates low-noise 2.5V reference rail for 12-bit SAR ADCs and analog front-end signal conditioning. Use Value: 40mVP-P output ripple and <0.1% output drift over temperature ensure <0.5 LSB measurement error in 2.5V full-scale conversions. |
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 flying capacitors; no shutdown pin | Not suitable for 2.5V rail generation; limited to higher-voltage systems | Select only if 5V output and higher current are required, and shutdown control is unnecessary |
| TPS60403DBVR | 2.5V output; 60mA max; 1.2MHz switching; integrated soft-start; same VSSOP-8 package | Offers tighter output tolerance (±1.5%) and lower quiescent current (25µA), but lacks thermal shutdown | Prefer for noise-sensitive applications where thermal margin is controlled externally; verify thermal design before substitution |
Compared with MAX680ESA+ and TPS60403DBVR, REG711EA-2.5/2K5 uniquely combines 2.5V output accuracy, integrated thermal protection, and sub-2µA shutdown current in a proven MSOP-8 footprint - making it optimal for thermally constrained, battery-powered 2.5V systems where reliability and ultra-low standby draw are critical.
Availability
REG711EA-2.5/2K5 is available at Aetrix Electronics and suitable for smart card readers, handheld meters, and portable communication devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for REG711EA-2.5/2K5 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 technologies, with decades of expertise in precision DC/DC conversion and battery-powered system design.
The REG711 family was engineered specifically for space- and power-constrained portable electronics, delivering regulated output voltages without inductors - targeting applications like SIM card supplies, LCD bias, and low-power MCU rails.
FAQ
What is the minimum input voltage required for REG711EA-2.5/2K5 to start up and regulate?
The REG711EA-2.5/2K5 guarantees startup at VIN ≥ 1.8V when loaded ≤50mA and operating within –40°C to +85°C. Startup is functional down to 1.8V, but full regulation (2.5V ±4.8%) is specified for VIN ≥ 2.0V at 50mA load. Below 2.0V, output may drop out of regulation during heavy load transients.
Can REG711EA-2.5/2K5 be used with tantalum output capacitors?
No - REG711EA-2.5/2K5 requires low-ESR ceramic capacitors (X7R/X5R dielectric) for COUT to meet its 40mVP-P ripple specification. Tantalum capacitors exhibit higher ESR (typically >100mΩ), which increases output ripple beyond 60mVP-P and may cause instability or excessive heating under 50mA load.
Does REG711EA-2.5/2K5 require external compensation components?
No - REG711EA-2.5/2K5 is internally compensated and operates stably with the recommended 2.2µF CIN, 2.2µF COUT, and 0.22µF CPUMP ceramic capacitors. No external resistors, capacitors, or feedback networks are needed - simplifying design and reducing bill-of-materials cost.
What is the thermal resistance (θJA) of REG711EA-2.5/2K5 in its VSSOP-8 package?
The REG711EA-2.5/2K5 has a junction-to-ambient thermal resistance (θJA) of 150°C/W in the standard VSSOP-8 (DGK) package with typical PCB layout (2-layer board, 1-in² copper pour on top layer only). Adding thermal vias to an internal ground plane can reduce θJA to ~65°C/W, enabling full 50mA output at +85°C ambient.
Is REG711EA-2.5/2K5 pin-compatible with other output voltage variants in the REG711EA family?
Yes - all REG711EA-x.x variants (including REG711EA-2.5/2K5, REG711EA-3.3/2K5, and REG711EA-5/2K5) share identical VSSOP-8 (DGK) pinout, package dimensions, and terminal functions. Only the output voltage and device marking differ; PCB layouts are fully interchangeable across the family.
REG711EA-2.5/2K5 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):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- 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-2.5/2K5 FAQ
1.How can I place an order for REG711EA-2.5/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG711EA-2.5/2K5 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-2.5/2K5 reliable?
The price and inventory of REG711EA-2.5/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG711EA-2.5/2K5 is usually 5 days.
3.What payment methods are accepted for REG711EA-2.5/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG711EA-2.5/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG711EA-2.5/2K5?
REG711EA-2.5/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG711EA-2.5/2K5 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-2.5/2K5?
For technical support, including REG711EA-2.5/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG711EA-2.5/2K5 requirements.
6.How does Aetrix verify that REG711EA-2.5/2K5 is sourced from the original manufacturer or authorized distributors?
All REG711EA-2.5/2K5 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-2.5/2K5 meets industry standards.
7.What is the process for return or replacement of REG711EA-2.5/2K5?
All REG711EA-2.5/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with REG711EA-2.5/2K5, 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-2.5/2K5 part is unused and in its original packaging.
Return procedure for REG711EA-2.5/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REG711EA-2.5/2K5 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
