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Microchip Technology TC682EOA713
- Part No.:
- TC682EOA713
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TC682EOA713.pdf
- Description:
- IC REG CHRG PUMP INV 10MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,134
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Product details
Overview
TC682EOA713 from Microchip Technology is a CMOS charge pump voltage inverter that generates a regulated negative doubled output (VOUT = –2 × VIN) from a single positive input supply. It operates across +2.4V to +5.5V input, delivers up to 10 mA output current with 140 Ω typical source resistance, and achieves 99.9% voltage conversion efficiency - ideal for generating –6V from a 3V lithium cell or –10V from a +5V logic rail in portable instrumentation.
For engineers reviewing the TC682EOA713 datasheet, TC682EOA713 pinout, TC682EOA713 application, or TC682EOA713 equivalent, key selection criteria include its –40°C to +85°C extended temperature rating, 8-pin SOIC package with NC pin, low 185 µA quiescent current, and compatibility with standard 3.3 µF low-ESR external capacitors for minimal BOM count.
Technical Context
The TC682EOA713 integrates a fixed-frequency 12 kHz on-chip oscillator to drive a four-switch charge pump topology, enabling phase-controlled capacitor charging and transfer without external timing components. Its internal switch architecture supports inversion and doubling simultaneously via C1/C2 pump capacitors and COUT reservoir capacitance.
Output regulation relies on passive impedance control rather than feedback loops: VOUT droop is directly determined by load current multiplied by ROUT (140–320 Ω), making output stability highly dependent on capacitor ESR and value selection per application load and ripple requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.4V to +5.5V - supports direct connection to 3V Li-cell or 5V logic rails without pre-regulation. |
| Output Voltage | VOUT = –2 × VIN - provides scalable negative bias (e.g., –6V from 3V, –10V from 5V) with no feedback loop. |
| Max Output Current | 10 mA - sufficient for LCD bias, op-amp dual supplies, and low-power analog circuitry. |
| Output Source Resistance | 140 Ω (typ) at 25°C - defines voltage droop under load: ΔV = ILOAD × ROUT. |
| Oscillator Frequency | 12 kHz (typ) - sets charge pump switching rate; determines capacitor sizing and ripple frequency. |
| Voltage Conversion Efficiency | 99.9% (typ) - minimizes input current draw for battery-sensitive applications. |
| Quiescent Supply Current | 185 µA (max) - enables ultra-low standby power in handheld devices. |
Pinout & Package
TC682EOA713 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, compliant with JEDEC MS-012. Pin 8 is NC (no connection); all other pins are electrically active and functionally assigned as shown below.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1–) | Capacitor C1 negative terminal | Switched node for charge transfer during Phase 1; connects to ground or C2– depending on clock phase. |
| 2 (C2+) | Capacitor C2 positive terminal | Node charged to VIN during Phase 2; forms inverted output path with C2–. |
| 3 (C2–) | Capacitor C2 negative terminal | Switched node tied to VOUT during Phase 2; critical for negative voltage generation. |
| 4 (VOUT) | Negative output terminal | Delivers –2×VIN; requires external reservoir capacitor (COUT) for ripple reduction. |
| 5 (GND) | Ground reference | Common return for input supply, oscillator, and internal switches; must be low-impedance. |
| 6 (VIN) | Positive input supply | Accepts unregulated 2.4–5.5V; internally clamped to 5.8V max by on-chip Zener. |
| 7 (C1+) | Capacitor C1 positive terminal | Charged to VIN during Phase 2; transfers stored charge to C2 during Phase 1. |
| 8 (NC) | No connection | Internally unconnected; must remain floating - not to be tied to GND or any signal. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting voltage doubler topology | Generates precise –2×VIN output without inductors or transformers - eliminates magnetic EMI and saves board space. |
| Integrated 12 kHz oscillator | Removes need for external clock source or crystal - reduces component count and layout complexity. |
| Only three external capacitors required | Supports full operation with C1, C2 (pump), and COUT (reservoir) - enables compact 8-pin SOIC implementation. |
| Low quiescent current (185 µA) | Extends battery life in always-on portable instruments and cellular handsets where standby power matters. |
| Extended temperature range (–40°C to +85°C) | Validated for industrial and automotive-adjacent environments - broader than commercial-grade TC682COA/CPA variants. |
Applications
| LCD Display Bias Generator | Operational Amplifier Power Supply |
|---|---|
Use Scenario: Generating negative bias voltage for segment drivers in monochrome or STN LCD panels powered from a single 3V or 5V supply. IC Role / Device Role / Timing Role: Charge pump inverter providing stable –6V or –10V rail independent of main system voltage. Use Value: Eliminates need for separate negative supply IC or transformer-based solution - reduces cost and footprint while maintaining display contrast across battery discharge. | Use Scenario: Supplying dual-rail ±V power to precision op-amps in handheld test equipment or sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Negative rail generator complementing a standard LDO or DC-DC for the positive rail. Use Value: Enables true bipolar operation (e.g., ±5V) from a single 5V input - preserves op-amp dynamic range and common-mode rejection without added noise or regulation overhead. |
| Portable Handheld Instrumentation | Cellular Phone Peripheral Power |
Use Scenario: Providing isolated negative voltage for analog front-end ICs, ADC references, or RF biasing in battery-powered multimeters or data loggers. IC Role / Device Role / Timing Role: Low-noise, low-quiescent inverter supporting intermittent high-current bursts during measurement cycles. Use Value: Delivers 10 mA peak current with <60 mV ripple (using 10 µF COUT) - ensures measurement accuracy and avoids digital coupling into sensitive analog sections. | Use Scenario: Powering SIM card interface circuitry, audio codec bias, or backlight driver ICs requiring negative voltage in slim-profile mobile handsets. IC Role / Device Role / Timing Role: Compact, capacitor-only voltage inverter integrated near point-of-load to minimize trace inductance. Use Value: SOIC-8 footprint and 185 µA quiescent current enable integration into space-constrained PCBs while preserving battery runtime during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC682COA | Same electrical specs but 0°C to +70°C operating range; identical SOIC-8 pinout and functionality. | Not rated for industrial ambient conditions; unsuitable where extended temperature validation is required. | Select TC682COA only for commercial-grade applications with controlled thermal environments. |
| MAX680ESA+ | Higher 100 kHz oscillator frequency; lower 100 Ω typical ROUT; requires different capacitor values (1 µF vs. 3.3 µF). | Better suited for higher-frequency, lower-ripple designs; not drop-in due to differing layout and capacitor recommendations. | Choose MAX680ESA+ when tighter output regulation and reduced capacitor size are prioritized over quiescent current. |
Compared with TC682COA, TC682EOA713 adds guaranteed operation down to –40°C - critical for outdoor or automotive-adjacent use. Against MAX680ESA+, it trades higher ripple and larger capacitors for significantly lower supply current and simpler design validation across temperature.
Availability
TC682EOA713 is available at Aetrix Electronics and suitable for portable handheld instruments, LCD display bias generation, and operational amplifier dual-supply systems requiring stable component supply across extended temperature ranges.
Supply support for TC682EOA713 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 is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs with global manufacturing and support infrastructure.
The TC682 product line was designed specifically for low-power, capacitor-based negative voltage generation in space-constrained portable electronics - emphasizing minimal external parts, wide input range, and robust efficiency across temperature.
FAQ
What is the maximum input voltage rating for the TC682EOA713?
The TC682EOA713 has an absolute maximum input voltage of +5.8V, enforced by internal Zener clamping. Operation above +5.5V is outside the recommended range and risks excessive current shunting through protection diodes, potentially degrading long-term reliability. For sustained use, keep VIN ≤ +5.5V as specified in the Electrical Characteristics table.
Can the TC682EOA713 generate regulated output voltage?
No, the TC682EOA713 is an unregulated charge pump inverter - its output voltage follows VOUT ≈ –2 × VIN minus droop (ILOAD × ROUT). Regulation requires an external LDO or feedback circuit, as demonstrated in Figure 4-3 of the datasheet using a TC54 negative LDO. The TC682EOA713 itself provides no closed-loop voltage control.
What capacitor values are recommended for optimal performance with the TC682EOA713?
Microchip specifies 3.3 µF low-ESR ceramic or tantalum capacitors for C1 and C2, and ≥10 µF for COUT (reservoir). Table 4-1 shows ROUT drops from 145 Ω to 87 Ω when increasing C1/C2 from 3.3 µF to 100 µF; Table 4-2 confirms COUT ≥22 µF reduces ripple to <43 mV at 10 mA. Use 12V-rated capacitors for C2 and COUT per Section 4.2.
Is pin 8 (NC) on the TC682EOA713 safe to connect to ground?
No - pin 8 is explicitly designated NC (no connection) in the Pin Function Table (DS21453D-page 4). Connecting it to ground, VIN, or any signal violates the device's internal layout and may cause unpredictable behavior or damage. It must remain electrically floating and unpopulated on the PCB - consistent with Microchip's package marking and functional block diagram.
How does temperature affect the output source resistance of the TC682EOA713?
According to Figure 7-6 (DS21453D-page 7), ROUT increases with temperature: from ~140 Ω at –40°C to ~200 Ω at +100°C under 10 mA load and VIN = 5V. This rise directly impacts output voltage droop (ΔV = ILOAD × ROUT), so designs requiring tight regulation across –40°C to +85°C must account for worst-case ROUT = 320 Ω (max spec) in calculations.
TC682EOA713 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 10mA
- Frequency - Switching:
- 12kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TC682EOA713 FAQ
1.How can I place an order for TC682EOA713 through Aetrix?
Please submit a Request for Quotation (RFQ) for TC682EOA713 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 TC682EOA713 reliable?
The price and inventory of TC682EOA713 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC682EOA713 is usually 5 days.
3.What payment methods are accepted for TC682EOA713?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC682EOA713 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC682EOA713?
TC682EOA713 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC682EOA713 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 TC682EOA713?
For technical support, including TC682EOA713 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC682EOA713 requirements.
6.How does Aetrix verify that TC682EOA713 is sourced from the original manufacturer or authorized distributors?
All TC682EOA713 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 TC682EOA713 meets industry standards.
7.What is the process for return or replacement of TC682EOA713?
All TC682EOA713 units undergo pre-shipment inspection (PSI). If there is an issue with TC682EOA713, 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 TC682EOA713 part is unused and in its original packaging.
Return procedure for TC682EOA713:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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