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Microchip Technology TC1044SCOA713
- Part No.:
- TC1044SCOA713
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TC1044SCOA713.pdf
- Description:
- IC REG CHARGE PUMP 20MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,005
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Product details
Overview
TC1044SCOA713 from Microchip Technology is a charge pump DC-DC voltage converter IC that inverts +1.5V to +12V input to corresponding –1.5V to –12V output using only two external capacitors. It delivers 99.9% voltage conversion efficiency, supports 10kHz/45kHz oscillator frequency selection via BOOST pin, and operates with 80µA supply current at 5V - ideal for RS-232 negative power supply generation in compact embedded systems.
For engineers reviewing the TC1044SCOA713 datasheet, TC1044SCOA713 pinout, TC1044SCOA713 application, or TC1044SCOA713 equivalent, key selection considerations include its 8-pin SOIC package, LV pin logic-dependent low-voltage operation mode, ±5V generation capability from +5V logic supply, and compatibility with polarized electrolytic capacitors (10µF) for cost-sensitive analog subsystems.
Technical Context
The TC1044SCOA713 integrates an internal RC oscillator, voltage-level translator, logic network for substrate bias control, and on-chip voltage regulator - all enabling latch-up-free charge pumping without external diodes. Its BOOST pin raises oscillator frequency from 10kHz to 45kHz, reducing required capacitor size while maintaining high conversion efficiency.
Operation relies on MOS switch topology (1 P-channel, 3 N-channel) with dynamic substrate biasing to prevent forward-biasing of parasitic junctions. The LV pin selects between regulated (LV open, V+ > 3.5V) and unregulated (LV = GND, V+ ≤ 3.5V) modes, directly affecting minimum operating voltage and start-up behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 12V - supports battery-powered and wide-rail industrial supplies without external regulation |
| Voltage Conversion Efficiency | 99.9% at no load - minimizes energy loss during inversion, critical for low-power sensor nodes |
| Oscillator Frequency | 10kHz (default) or 45kHz (BOOST = V+) - enables trade-off between capacitor size and switching loss |
| Supply Current | 80µA typical at VIN = 5V - allows direct connection to microcontroller I/O rails without loading |
| Output Source Resistance | 60Ω typical at 20mA - defines voltage droop under load; supports up to ~50mA with <10% regulation error |
| Operating Temperature | 0°C to +70°C - commercial-grade thermal range suitable for office and consumer electronics |
| Package | 8-pin SOIC (SOIC-8) - surface-mount footprint compatible with automated assembly and space-constrained PCBs |
Pinout & Package
TC1044SCOA713 is housed in an 8-pin Small Outline Integrated Circuit (SOIC-8) package with standard 1.27mm pitch, JEDEC MS-012AC compliant dimensions, and 470mW power dissipation limit at TA ≤ 70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency control input | Connect to V+ to raise oscillator frequency from 10kHz to 45kHz; improves transient response and reduces capacitor size |
| 2 (CAP+) | Charge pump capacitor positive terminal | Drives primary charge transfer capacitor (C1); polarity-sensitive when using electrolytic capacitors |
| 3 (GND) | Ground reference | System ground return path; must be low-impedance to minimize noise coupling into inverted output |
| 4 (CAP–) | Charge pump capacitor negative terminal | Completes charge transfer loop with CAP+; connects to negative terminal of C1 in inverting configuration |
| 5 (VOUT) | Inverted output voltage node | Delivers –VIN output; requires reservoir capacitor (C2) to ground for ripple suppression |
| 6 (LV) | Low-voltage operation enable | Ground to disable internal regulator for V+ ≤ 3.5V; leave open for V+ > 3.5V to prevent latch-up |
| 7 (OSC) | Oscillator timing node | Accepts external capacitor to ground for frequency reduction; optional external clock input (with series 1kΩ resistor) |
| 8 (V+) | Positive supply input | Primary power input; absolute maximum rating is +13V; must be applied before any other signal |
Key Features
| Feature | Design Value |
|---|---|
| No inductor required | Enables ultra-compact, EMI-quiet negative rail generation using only two low-cost electrolytic capacitors |
| Pin-compatible upgrade to TC7660 | Direct replacement in legacy designs without PCB modification; retains identical pinout and functional behavior |
| 10kV ESD protection | Robust handling during board assembly and field service; eliminates need for external ESD clamps in most applications |
| Frequency boost capability | 45kHz operation reduces required capacitor values by ~4.5× versus 10kHz mode, saving board area and cost |
| LV pin logic-selectable operation | Single pin configures device for low-voltage (≤3.5V) or standard (≥3.5V) supply ranges - no external components needed |
Applications
| RS-232 Transceiver Power Supply | Portable Instrumentation ADC Bias |
|---|---|
|
Use Scenario: Generating –5V rail for MAX232 or similar RS-232 level shifters from a single +5V microcontroller supply. IC Role / Device Role / Timing Role: Charge pump inverter providing isolated negative voltage with no magnetic components. Use Value: Eliminates need for dual-output DC-DC converters or transformer-based solutions, reducing BOM count and layout complexity. |
Use Scenario: Supplying –5V reference to precision 4½-digit ADCs (e.g., TC7135) in handheld multimeters powered by +5V logic rails. IC Role / Device Role / Timing Role: Low-noise negative voltage source enabling true bipolar input measurement with grounded signal references. Use Value: Achieves 99.9% voltage conversion efficiency to preserve battery life while maintaining <0.1% line regulation over load. |
| Display Driver Negative Bias | Split-Rail Op-Amp Supply |
|
Use Scenario: Providing negative gate bias for LCD segment drivers or OLED pixel control circuits requiring –3V to –10V. IC Role / Device Role / Timing Role: Inverting charge pump delivering stable negative voltage with minimal quiescent current draw. Use Value: Supports display contrast control across temperature with 80µA supply current - extends runtime in battery-operated displays. |
Use Scenario: Creating symmetrical ±5V supplies for rail-to-rail op-amps in audio preamplifiers or sensor signal conditioning stages. IC Role / Device Role / Timing Role: Dual-rail generator where one TC1044SCOA713 inverts +5V to –5V while main supply provides +5V. Use Value: Enables zero-input-offset operation and full-scale swing without external regulators or discrete transistor networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC1044SEOA | Extended temperature range (–40°C to +85°C) vs. TC1044SCOA713's 0°C to +70°C; otherwise identical electrical specs and pinout | Suitable for industrial or automotive under-hood environments where ambient exceeds 70°C | Select TC1044SEOA when operating temperature exceeds +70°C; same PCB layout and bill-of-materials |
| MAX680CPA+ | Higher 120kHz oscillator frequency, 125µA supply current, and 100kΩ output impedance spec - not pin-compatible; requires different capacitor values | Better suited for high-frequency, low-ripple applications but demands redesign of external components and layout | Choose MAX680CPA+ only when higher switching frequency justifies full schematic and layout revision |
Compared with TC1044SEOA, TC1044SCOA713 offers lower cost and sufficient thermal margin for commercial equipment, while MAX680CPA+ trades pin compatibility for higher frequency - making TC1044SCOA713 optimal for drop-in upgrades and cost-sensitive volume production.
Availability
TC1044SCOA713 is available at Aetrix Electronics and suitable for RS-232 interface design, portable instrumentation power management, and LCD display bias generation requiring stable component supply and long-term obsolescence planning.
Supply support for TC1044SCOA713 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 emphasis on reliability and long product lifecycles.
The TC1044S family was designed specifically for low-cost, inductorless voltage inversion in space-constrained and battery-powered systems - targeting RS-232, data acquisition, and display subsystems.
FAQ
What is the function of the LV pin on the TC1044SCOA713?
The LV pin on the TC1044SCOA713 controls internal voltage regulator activation. When LV is grounded, the regulator is disabled - enabling operation down to 1.5V input, essential for low-voltage battery systems. When LV is left open, the regulator remains active, protecting against latch-up for inputs above 3.5V. This dual-mode operation makes TC1044SCOA713 adaptable across wide input ranges without external circuitry.
Can the TC1044SCOA713 generate voltages other than –VIN?
Yes, the TC1044SCOA713 can generate non-inverted outputs including positive voltage multiplication (e.g., +10V from +5V) and split-rail supplies (e.g., ±2.5V from +5V) using modified external capacitor and diode configurations per Figures 8–11 in DS21348A. However, these modes require additional passive components and alter efficiency and output impedance - the core specification of TC1044SCOA713 remains optimized for standard inverting operation.
What capacitor types and values are recommended for the TC1044SCOA713?
For standard inverting operation, the TC1044SCOA713 recommends 10µF polarized aluminum or tantalum electrolytic capacitors for both C1 (CAP+/CAP–) and C2 (VOUT/GND), with 16V or higher voltage rating. Ceramic capacitors may be used if low-ESR and sufficient capacitance (≥10µF) are maintained. Larger values (e.g., 100µF) are advised when lowering oscillator frequency to maintain output regulation and ripple performance.
Is the TC1044SCOA713 pin-compatible with the TC7660?
Yes, the TC1044SCOA713 is explicitly designed as a pin-compatible upgrade to the TC7660, sharing identical pinout, package dimensions, and functional behavior. It adds extended input voltage range (up to 12V), improved ESD protection (10kV), and BOOST pin functionality - all without requiring PCB changes or firmware updates when replacing TC7660 in existing designs.
How does the BOOST pin affect TC1044SCOA713 performance?
Connecting the BOOST pin of the TC1044SCOA713 to V+ increases oscillator frequency from 10kHz to 45kHz, reducing required external capacitor values by ~4.5× and improving transient response. However, supply current rises to ~300µA (vs. 80µA nominal), and power efficiency drops slightly to ~88% - a deliberate trade-off favoring size and dynamic performance over quiescent power in applications like portable instruments.
TC1044SCOA713 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):
- 1.5V
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- -Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 20mA
- Frequency - Switching:
- 10kHz, 45kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TC1044SCOA713 FAQ
1.How can I place an order for TC1044SCOA713 through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1044SCOA713 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 TC1044SCOA713 reliable?
The price and inventory of TC1044SCOA713 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1044SCOA713 is usually 5 days.
3.What payment methods are accepted for TC1044SCOA713?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1044SCOA713 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1044SCOA713?
TC1044SCOA713 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1044SCOA713 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 TC1044SCOA713?
For technical support, including TC1044SCOA713 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1044SCOA713 requirements.
6.How does Aetrix verify that TC1044SCOA713 is sourced from the original manufacturer or authorized distributors?
All TC1044SCOA713 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 TC1044SCOA713 meets industry standards.
7.What is the process for return or replacement of TC1044SCOA713?
All TC1044SCOA713 units undergo pre-shipment inspection (PSI). If there is an issue with TC1044SCOA713, 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 TC1044SCOA713 part is unused and in its original packaging.
Return procedure for TC1044SCOA713:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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