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Microchip Technology TC1240AECHTR
- Part No.:
- TC1240AECHTR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-6
- Datasheet:
-
TC1240AECHTR.pdf
- Description:
- IC REG CHARGE PUMP 2VIN SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:21,417
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Product details
Overview
TC1240AECHTR from Microchip Technology is a CMOS charge pump voltage doubler IC in a 6-pin SOT-23A package, designed for battery-powered systems requiring efficient DC-DC voltage multiplication. It accepts input voltages from +2.5V to +5.5V, delivers up to ~11V output (2×VIN), achieves >99% typical voltage conversion efficiency, features 12Ω typical output resistance at +25°C, and includes active-high shutdown consuming ≤1 µA.
For engineers reviewing the TC1240AECHTR datasheet, TC1240AECHTR pinout, TC1240AECHTR application, or TC1240AECHTR equivalent, this page provides verified functional identity, validated pin roles, confirmed efficiency and output impedance behavior, and real-world use cases in portable instrumentation and low-power handheld devices.
Technical Context
The TC1240AECHTR implements a two-phase switched-capacitor voltage doubler using integrated MOSFET switches and a fixed 160 kHz internal oscillator (80 kHz effective switching frequency). Its architecture requires only two external ceramic capacitors-C1 (commutation) and C2 (reservoir)-with no inductors or regulators.
It operates as an unregulated voltage multiplier: output voltage equals approximately 2×VIN minus ILOAD×ROUT, where ROUT is dominated by internal switch on-resistance (typ. 4 Ω) and capacitor ESR contributions. Shutdown control is fully compatible with 1.8V logic systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.5V to +5.5V - supports single-cell Li-ion, dual-cell alkaline, or regulated 3.3V/5V rails without derating. |
| Output Voltage | ~2×VIN (e.g., ~10V at VIN = 5V) - unregulated; droops linearly with load per ROUT ≈ 12Ω. |
| Voltage Conversion Efficiency | >99% typical - minimizes power loss in space-constrained battery applications. |
| Supply Current (Active) | 550 µA typical - enables ultra-low quiescent operation in always-on subsystems. |
| Shutdown Current | ≤1.0 µA - ensures negligible battery drain during system sleep modes. |
| Oscillator Frequency | 160 kHz internal - sets fixed 80 kHz charge-transfer rate; stable over -40°C to +85°C. |
| Output Current Capability | 20 mA maximum - sufficient for LCD bias, op-amp supplies, or sensor excitation. |
Pinout & Package
TC1240AECHTR is housed in a JEITA SC-74A (EIAJ) 6-pin SOT-23A surface-mount package, measuring 2.95 mm × 1.63 mm × 1.18 mm (L × W × H), with 0.95 mm lead pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Power supply input | Accepts 2.5–5.5V DC; must be bypassed with ≥3.3 µF capacitor to GND for low-noise operation. |
| 2 (GND) | Ground reference | Common return path for input, output, and internal oscillator; requires low-impedance PCB connection. |
| 3 (C−) | Commutation capacitor negative terminal | Connects to negative side of flying capacitor C1; critical node for charge transfer timing and ripple control. |
| 4 (SHDN) | Active-high shutdown input | Drives device into <1 µA standby when pulled high; compatible with 1.8V logic; must not float. |
| 5 (VOUT) | Doubled output voltage | Delivers ~2×VIN; output impedance ≈12Ω limits max load to ~20 mA before excessive droop. |
| 6 (C+) | Commutation capacitor positive terminal | Connects to positive side of flying capacitor C1; alternates between VIN and VOUT potentials during switching phases. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage doubling architecture | Eliminates need for inductors or transformers-reduces BOM count and board area in portable designs. |
| Only two external capacitors required | Enables minimal footprint implementation: C1 (flying) and C2 (reservoir) both typically 3.3 µF X5R/X7R ceramics. |
| 12Ω typical output resistance | Supports stable 5–10 mA loads at <5% voltage droop; enables direct driving of moderate-current analog circuitry. |
| 160 kHz fixed-frequency oscillator | Ensures predictable EMI profile and simplifies filtering; avoids audible noise in audio-adjacent applications. |
| 1.8V-compatible shutdown input | Allows seamless integration with modern low-voltage microcontrollers without level-shifting circuitry. |
Applications
| Portable Medical Sensors | LCD Bias Generation |
|---|---|
|
Use Scenario: Powering analog front-end amplifiers and ADC reference supplies in handheld pulse oximeters and glucose meters. IC Role / Device Role / Timing Role: Voltage doubler providing stable +5V to +10V rail from single 3.7V Li-ion cell. Use Value: Enables higher signal-to-noise ratio in sensor conditioning without adding inductor-based converters or extra cells. |
Use Scenario: Generating positive bias voltage for segment LCD displays in PDAs and industrial handheld terminals. IC Role / Device Role / Timing Role: Unregulated voltage multiplier delivering ~10V from 5V system rail to drive LCD common electrode. Use Value: Eliminates discrete transistor-based charge pumps; reduces component count and improves long-term reliability. |
| Battery-Powered Test Equipment | Low-Power RF Module Supply |
|
Use Scenario: Supplying ±5V rails (using complementary inverter) for op-amps and comparators in portable multimeters. IC Role / Device Role / Timing Role: Doubler stage feeding inverting regulator to generate negative rail; operates only during measurement bursts. Use Value: Achieves <1 µA shutdown current, extending battery life between calibrations or measurements. |
Use Scenario: Providing boosted supply for RF power amplifier bias in Bluetooth LE modules operating from coin-cell batteries. IC Role / Device Role / Timing Role: Efficient voltage booster enabling higher transmit power from 3V supply while minimizing thermal rise. Use Value: Delivers >99% conversion efficiency at light loads, preserving battery capacity during intermittent TX duty cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-doubling charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX682ESA+ | Wider input range (1.5V–6.5V); higher 250 mA output capability; requires three external capacitors. | Supports higher-current loads (e.g., flash memory programming), but larger solution size and cost. | Choose MAX682ESA+ when >20 mA output or sub-2.5V start-up is required; TC1240AECHTR remains optimal for compact, low-IQ designs. |
| TPS60205DGSR | Fixed 2.5V input minimum; 120 kHz switching; 15Ω typical ROUT; 1.2 µA shutdown current. | Slightly lower efficiency (~95%) and higher output impedance limit usable load current. | Select TPS60205DGSR if TI ecosystem alignment or tighter shutdown current spec is prioritized over efficiency and output drive. |
Compared with MAX682ESA+ and TPS60205DGSR, TC1240AECHTR offers superior voltage conversion efficiency (>99%), lowest active supply current (550 µA), and smallest external component count-making it ideal for space- and energy-constrained portable electronics where 20 mA output suffices.
Availability
TC1240AECHTR is available at Aetrix Electronics and suitable for portable medical sensors, LCD bias generation, battery-powered test equipment, and low-power RF module supply requiring stable component supply and long-lifecycle support.
Supply support for TC1240AECHTR 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
Microchip Technology Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs, with ISO/TS-16949 certified fabrication and design facilities.
TC1240AECHTR belongs to Microchip's legacy charge pump product line, engineered specifically for compact, high-efficiency voltage multiplication in battery-operated consumer and industrial portable equipment.
FAQ
What is the maximum continuous output current of the TC1240AECHTR?
The TC1240AECHTR is rated for up to 20 mA continuous output current under specified conditions (TA = –40°C to +85°C, VIN = +5.0V). Exceeding this current causes increased voltage droop due to its 12Ω typical output resistance and may reduce conversion efficiency below 94%. For sustained 20 mA loads, ensure adequate PCB copper area for thermal dissipation and use low-ESR ceramic capacitors.
Does the TC1240AECHTR provide regulated output voltage?
No, the TC1240AECHTR is an unregulated voltage doubler. Its output voltage approximates 2×VIN but drops linearly with load current per VDROOP = IOUT × ROUT. At 10 mA load, expect ~0.12V drop from ideal 2×VIN. For regulated outputs, pair TC1240AECHTR with a low-dropout linear regulator or use a dedicated regulated charge pump like the MCP1252.
Can the TC1240AECHTR operate from a 2.5V input supply?
Yes, TC1240AECHTR supports a minimum input voltage of +2.5V across its full operating temperature range (–40°C to +85°C). At 2.5V input, it delivers ~5.0V output with typical efficiency of 99% and output resistance near 12Ω. Ensure input bypass capacitance ≥3.3 µF and use low-ESR capacitors to maintain stability at light loads.
What is the recommended capacitor value for C1 and C2 in a TC1240AECHTR design?
Microchip recommends 3.3 µF X5R or X7R ceramic capacitors for both C1 (commutation) and C2 (reservoir) in standard TC1240AECHTR applications. This selection balances output resistance (~12Ω), ripple (<20 mV at 5 mA), and board area. Larger C1 values (e.g., 10 µF) further reduce ROUT, while larger C2 values (e.g., 10 µF) suppress ripple but increase startup time.
Is the TC1240AECHTR pin-compatible with the TC1240ECHTR?
Yes, TC1240AECHTR and TC1240ECHTR share identical 6-pin SOT-23A pinout, package dimensions, and terminal functions. However, TC1240AECHTR supports a wider input range (+2.5V to +5.5V) versus TC1240ECHTR (+2.5V to +4.0V), and exhibits lower output resistance (12Ω vs. 17Ω) and higher supply current (550 µA vs. 180 µA). System-level validation is required when substituting.
TC1240AECHTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 40mA
- Frequency - Switching:
- 80kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TC1240AECHTR FAQ
1.How can I place an order for TC1240AECHTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1240AECHTR 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 TC1240AECHTR reliable?
The price and inventory of TC1240AECHTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1240AECHTR is usually 5 days.
3.What payment methods are accepted for TC1240AECHTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1240AECHTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1240AECHTR?
TC1240AECHTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1240AECHTR 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 TC1240AECHTR?
For technical support, including TC1240AECHTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1240AECHTR requirements.
6.How does Aetrix verify that TC1240AECHTR is sourced from the original manufacturer or authorized distributors?
All TC1240AECHTR 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 TC1240AECHTR meets industry standards.
7.What is the process for return or replacement of TC1240AECHTR?
All TC1240AECHTR units undergo pre-shipment inspection (PSI). If there is an issue with TC1240AECHTR, 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 TC1240AECHTR part is unused and in its original packaging.
Return procedure for TC1240AECHTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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