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Microchip Technology TC1121EOA713
- Part No.:
- TC1121EOA713
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TC1121EOA713.pdf
- Description:
- IC REG CHARGE PUMP 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,840
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Product details
Overview
TC1121EOA713 from Microchip Technology is a 100 mA charge pump voltage inverter IC that converts 2.4V–5.5V positive input to a corresponding negative output without inductors. It features selectable oscillator frequency (10–200 kHz), 50 µA quiescent current (FC open), and shutdown control. It serves as a compact, low-EMI negative rail generator in space-constrained portable instrumentation.
For engineers reviewing the TC1121EOA713 datasheet, TC1121EOA713 pinout, TC1121EOA713 application, or TC1121EOA713 equivalent, key selection factors include its -40°C to +85°C industrial temperature rating, 8-pin SOIC package with 713 taping orientation, dual-capacitor topology, and oscillator frequency programmability via FC pin.
Technical Context
The TC1121EOA713 implements a switched-capacitor inverter architecture with internal oscillator control logic and a 4-switch matrix. Its output voltage magnitude tracks input (VOUT ≈ –VIN) with no active regulation, yielding ~11.8 Ω typical output resistance at 100 mA load.
Oscillator frequency is set by FC pin state (10 kHz typ. when open; 200 kHz typ. when tied to V+) or overridden externally via OSC pin. Ripple frequency equals half the selected oscillator frequency, enabling ripple reduction through capacitor scaling or frequency increase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 100 mA max - supports moderate-power analog rails or op-amp biasing |
| Input Voltage Range | 2.4V to 5.5V - compatible with single-cell Li-ion, 3.3V, and 5V logic supplies |
| Oscillator Frequency | 10 kHz to 200 kHz - enables trade-off between capacitor size (smaller at 200 kHz) and quiescent current (lower at 10 kHz) |
| Quiescent Current | 50 µA typ. (FC open) - minimizes standby power in battery-operated systems |
| Shutdown Current | <1 µA - ensures near-zero power draw during system sleep modes |
| Output Resistance | 12 Ω typ. - defines load-induced voltage droop (e.g., ~1.2V drop at 100 mA) |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
Pinout & Package
TC1121EOA713 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package, 3.99 mm × 4.90 mm body, 1.27 mm pitch, with standard 713 reel taping orientation (pin 1 in upper-left corner of carrier tape).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FC | Frequency control input | Open = 10 kHz oscillator; tied to V+ = 200 kHz; no effect when OSC driven externally |
| 2 CAP+ | Charge-pump capacitor positive terminal | Connects to positive plate of flying capacitor C1; switches between V+ and VOUT nodes |
| 3 GND | Power-supply ground reference | Return path for internal logic and switch matrix; must be low-impedance |
| 4 CAP– | Charge-pump capacitor negative terminal | Connects to negative plate of flying capacitor C1; switches between GND and VOUT nodes |
| 5 VOUT | Negative output voltage terminal | Delivers inverted output (≈ –VIN); source impedance ~12 Ω limits heavy-load regulation |
| 6 SHDN | Active-high shutdown control | Logic high enables operation; logic low reduces supply current to <1 µA |
| 7 OSC | Oscillator control/external clock input | Accepts external CMOS clock or external capacitor to ground for sub-10 kHz operation |
| 8 V+ | Positive input supply | Primary power input (2.4V–5.5V); powers internal logic and switch drivers |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor design | Eliminates magnetic EMI, reduces board area, and lowers BOM cost versus inductive DC/DC inverters |
| Selectable oscillator frequency | Enables optimization of external capacitor size (10–200 kHz range) without changing layout |
| Ultra-low shutdown current | <1 µA shutdown draw extends battery life in always-on or duty-cycled portable instruments |
| Industrial temperature grade | -40°C to +85°C operation supports deployment in medical, test, and industrial environments |
| Single-supply negative generation | Derives clean negative rail from single positive supply-no split-rail or transformer needed |
Applications
| Laptop Power Management | Medical Instrumentation |
|---|---|
Use Scenario: Generating -5V bias for LCD contrast control or analog front-end op-amps in ultra-thin notebooks. IC Role / Device Role / Timing Role: Charge pump inverter providing unregulated negative rail from 3.3V or 5V main supply. Use Value: Eliminates need for bulky inductors and simplifies PCB layout while meeting tight height constraints. | Use Scenario: Supplying ±5V rails for precision ADC drivers and sensor signal conditioning in portable ECG monitors. IC Role / Device Role / Timing Role: Negative voltage generator supporting rail-to-rail input op-amps requiring symmetric supply. Use Value: Delivers stable -5V output with <90 mV ripple (at 100 mA, 200 kHz mode), critical for low-noise analog acquisition. |
| Disk Drive Servo Control | μP-Based Industrial Controllers |
Use Scenario: Providing negative gate drive or bias voltage for voice coil motor (VCM) driver circuits in 2.5-inch HDDs. IC Role / Device Role / Timing Role: High-current inverter delivering up to 100 mA at -3.8V under full load. Use Value: Output resistance of 12 Ω ensures predictable voltage droop across dynamic servo loads, enabling accurate current modeling. | Use Scenario: Generating local -5V supply for RS-232 transceivers and isolated I/O buffers in PLC modules. IC Role / Device Role / Timing Role: Standalone negative rail generator interfacing with 3.3V/5V microcontroller I/O domains. Use Value: Shutdown pin allows synchronized power-down with host MCU, reducing system idle power by >99%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Fixed 10 kHz oscillator; no FC pin; 100 mA output; SOIC-8; -40°C to +85°C | Lacks frequency selectability - requires fixed 10 µF/100 µF capacitor set; no external clock option | Choose when design prioritizes simplicity over capacitor size optimization |
| LM27761DSGR | Integrated LDO post-regulator; 250 mA output; 2.7V–5.5V input; WSON-10; -40°C to +85°C | Provides regulated -5V output (±1%) vs. TC1121EOA713's unregulated inversion; higher cost and pin count | Choose when precise, load-independent negative voltage is required over raw efficiency or footprint |
Compared with MAX680ESA+ and LM27761DSGR, TC1121EOA713 offers unique frequency programmability for capacitor sizing trade-offs and delivers the lowest quiescent current (50 µA) among these three, making it optimal for battery-sensitive industrial instrumentation where unregulated but predictable inversion suffices.
Availability
TC1121EOA713 is available at Aetrix Electronics and suitable for laptop computers, medical instrumentation, disk drives, and μP-based controllers requiring stable component supply across industrial temperature ranges.
Supply support for TC1121EOA713 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 global manufacturing.
The TC1121 product line was designed specifically for compact, inductorless negative voltage generation in portable and industrial electronics where EMI, size, and standby power are critical constraints.
FAQ
What is the operating temperature range of the TC1121EOA713?
The TC1121EOA713 is rated for -40°C to +85°C operation, confirmed by Microchip's DS20001358D datasheet Section 1.0 (Absolute Maximum Ratings) and Device Selection Table. This E-suffix grade makes TC1121EOA713 suitable for industrial and extended-temperature applications where commercial-grade variants (C-suffix) would fail.
Does the TC1121EOA713 require external inductors?
No, the TC1121EOA713 uses a switched-capacitor (charge pump) architecture and requires only two external capacitors - no inductors. As stated in the General Description on DS20001358D-page 1, this eliminates EMI concerns and reduces board area, distinguishing TC1121EOA713 from inductive DC/DC inverters.
How does the FC pin affect TC1121EOA713 performance?
The FC pin on TC1121EOA713 selects internal oscillator frequency: open circuit yields ~10 kHz (minimizing quiescent current), while connection to V+ raises it to ~200 kHz (enabling smaller external capacitors). Per DS20001358D-page 3 Electrical Specifications, FOSC ranges from 5–10 kHz to 100–200 kHz depending on FC state - a key design lever in TC1121EOA713 layout optimization.
What is the typical output resistance of the TC1121EOA713?
The TC1121EOA713 has a typical output source resistance (ROUT) of 12 Ω, with a maximum of 20 Ω, as specified in the Electrical Specifications table (DS20001358D-page 3). This value directly determines load-induced voltage droop - e.g., a 100 mA load causes ~1.2 V drop from ideal -5V, making TC1121EOA713 appropriate for moderate-precision applications.
Can TC1121EOA713 be used in shutdown mode to reduce power consumption?
Yes, TC1121EOA713 features an active-high SHDN pin. When pulled low, shutdown current drops to less than 1 µA (typ. 0.2 µA), as verified in the Electrical Specifications table (DS20001358D-page 3). This ultra-low shutdown draw makes TC1121EOA713 ideal for battery-powered systems requiring long idle periods without compromising wake-up responsiveness.
TC1121EOA713 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- -Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 100mA
- Frequency - Switching:
- 10kHz ~ 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TC1121EOA713 FAQ
1.How can I place an order for TC1121EOA713 through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1121EOA713 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 TC1121EOA713 reliable?
The price and inventory of TC1121EOA713 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1121EOA713 is usually 5 days.
3.What payment methods are accepted for TC1121EOA713?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1121EOA713 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1121EOA713?
TC1121EOA713 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1121EOA713 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 TC1121EOA713?
For technical support, including TC1121EOA713 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1121EOA713 requirements.
6.How does Aetrix verify that TC1121EOA713 is sourced from the original manufacturer or authorized distributors?
All TC1121EOA713 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 TC1121EOA713 meets industry standards.
7.What is the process for return or replacement of TC1121EOA713?
All TC1121EOA713 units undergo pre-shipment inspection (PSI). If there is an issue with TC1121EOA713, 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 TC1121EOA713 part is unused and in its original packaging.
Return procedure for TC1121EOA713:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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