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Microchip Technology TC1121COA713
- Part No.:
- TC1121COA713
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TC1121COA713.pdf
- Description:
- IC REG CHARGE PUMP 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,561
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Product details
Overview
TC1121COA713 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 voltage without inductors. It features selectable oscillator frequency (10 kHz or 200 kHz), 50 µA quiescent current (FC open), and shutdown control. It is used in laptop computers and medical instrumentation for compact dual-rail power generation.
For engineers reviewing the TC1121COA713 datasheet, TC1121COA713 pinout, TC1121COA713 application, or TC1121COA713 equivalent, key selection criteria include output current capability (100 mA), oscillator frequency configurability, shutdown functionality, and SOIC-8 package compatibility with standard PCB layouts.
Technical Context
The TC1121COA713 implements a two-phase switched-capacitor inverter topology with internal oscillator control via FC and OSC pins. Its charge-pump switching matrix operates at either 10 kHz (FC open) or 200 kHz (FC = V+), directly affecting capacitor size requirements and ripple performance.
It delivers regulated-negative output through capacitive energy transfer using only two external capacitors (CAP+ and CAP–), with no magnetic components. Output source resistance is 12 Ω typical at 60 mA load, and shutdown reduces supply current to ≤1 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 100 mA max - supports moderate-power analog rails and sensor biasing |
| Input Voltage Range | 2.4V to 5.5V - compatible with single-cell Li-ion, USB, and 3.3V/5V logic supplies |
| Oscillator Frequency | 10 kHz or 200 kHz - enables trade-off between low quiescent current and small external capacitor size |
| Quiescent Current | 50 µA typical (FC open) - suitable for battery-powered standby operation |
| Shutdown Current | <1 µA - enables deep power-down in system-level energy management |
| Output Resistance | 12 Ω typical at 60 mA - defines load regulation slope (~0.72 V drop at 60 mA) |
| Operating Temp | 0°C to +70°C - commercial-grade thermal range for non-automotive embedded systems |
Pinout & Package
TC1121COA713 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package, 3.9 mm × 4.9 mm body, 1.27 mm pitch, with standard JEDEC MS-012AC footprint and tape-and-reel packaging (713 suffix indicates 2500-unit reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FC) | Frequency Control Input | Selects oscillator mode: open = 10 kHz, tied to V+ = 200 kHz; no effect when OSC is externally driven |
| 2 (CAP+) | Charge-Pump Capacitor Positive Terminal | Connects to positive plate of flying capacitor C1; handles bidirectional high-current switching |
| 3 (GND) | Power Ground Reference | Primary return path for internal switches and logic; must be low-impedance for ripple control |
| 4 (CAP–) | Charge-Pump Capacitor Negative Terminal | Connects to negative plate of flying capacitor C1; forms charge-transfer node with CAP+ |
| 5 (VOUT) | Negative Output Terminal | Delivers inverted voltage rail; output impedance impacts load regulation under 100 mA draw |
| 6 (SHDN) | Active-Low Shutdown Input | Pulls low to disable oscillator and switches, reducing 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 Supply Input | Supplies all internal circuitry; absolute max 6V; must be decoupled near pin for stability |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor voltage inversion | Eliminates EMI-sensitive magnetics and reduces BOM cost/PCB area vs. inductive DC/DC converters |
| Configurable oscillator frequency | 10 kHz (low IQ) or 200 kHz (smaller 10 µF caps) - direct trade-off between efficiency and component size |
| Integrated shutdown control | Reduces total system standby power by enabling full device disable without external MOSFETs |
| Single-supply negative rail generation | Derives clean –VIN from +VIN using only two ceramic capacitors - simplifies dual-rail analog subsystem design |
| Low-output-impedance architecture | 12 Ω typical source resistance supports stable operation up to 100 mA without external LDO post-regulation |
Applications
| Laptop Power Management | Medical Sensor Biasing |
|---|---|
Use Scenario: Generating –5V rail from 5V USB supply for op-amp reference and ADC driver stages in portable diagnostic devices. IC Role / Device Role / Timing Role: Charge-pump inverter providing isolated negative bias without inductors or complex regulation. Use Value: Enables compact, low-EMI analog front-end design with <1 µA shutdown current extending battery life. | Use Scenario: Supplying –3.3V bias to precision instrumentation amplifiers in handheld ECG monitors. IC Role / Device Role / Timing Role: Negative voltage generator delivering stable rail under dynamic sensor load changes. Use Value: Maintains 12 Ω output impedance and 93% power efficiency across 0–100 mA loads, minimizing signal offset drift. |
| Disk Drive Servo Control | μP-Based Industrial Controller |
Use Scenario: Providing negative gate drive for H-bridge MOSFETs in 2.5-inch HDD voice coil motor drivers. IC Role / Device Role / Timing Role: High-current inverter supporting pulsed 100 mA loads during seek operations. Use Value: Delivers 100 mA peak current with <90 mV ripple (at 100 mA, 150 µF C2), ensuring accurate coil positioning. | Use Scenario: Creating –5V supply for RS-232 transceivers and analog I/O in programmable logic controllers. IC Role / Device Role / Timing Role: Standby-enabled negative rail generator interfacing with microcontroller GPIO and UART peripherals. Use Value: SHDN pin allows synchronized rail disable during sleep modes, cutting 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; ±5V output from 5V input | Lacks frequency selectability and shutdown control; higher quiescent current (120 µA) | Choose when oscillator flexibility and ultra-low shutdown current are not required |
| LM27761DSGR | Integrated LDO post-regulator; 200 mA output; 1.2 MHz switching; requires three external caps | Provides regulated –5V output; higher efficiency at light loads; larger solution size | Prefer when output voltage accuracy and ripple suppression outweigh board space constraints |
Compared with MAX680ESA+ and LM27761DSGR, TC1121COA713 offers unique frequency-selectable operation and sub-1 µA shutdown, making it optimal for space-constrained, battery-sensitive designs where moderate output regulation tolerance is acceptable.
Availability
TC1121COA713 is available at Aetrix Electronics and suitable for laptop computers, medical instruments, and disk drives requiring stable component supply with long-term industrial availability.
Supply support for TC1121COA713 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 ISO/TS-16949 certified manufacturing.
The TC1121COA713 belongs to Microchip's legacy charge pump converter product line, designed specifically for compact, inductorless negative voltage generation in portable and instrumentation applications.
FAQ
What is the maximum input voltage rating for TC1121COA713?
The TC1121COA713 has an absolute maximum input voltage (V+) rating of 6V. Operation above this level risks permanent damage. The recommended operating range is 2.4V to 5.5V per the datasheet, with typical use at 3.3V or 5V. Exceeding 6V violates Absolute Maximum Ratings and may trigger latch-up or junction breakdown. Always ensure proper decoupling and transient protection on the V+ line when using TC1121COA713 in real-world systems.
Can TC1121COA713 generate regulated output voltage?
No, TC1121COA713 provides unregulated negative output - its VOUT magnitude is approximately –VIN, with load-dependent droop due to 12 Ω typical output resistance. At 100 mA, output drops to ~–3.8V from a 5V input. Regulation depends entirely on external capacitor selection and load stability. For regulated outputs, a low-dropout linear regulator must be added downstream of TC1121COA713, or an alternative like LM27761DSGR should be considered.
How does the FC pin affect TC1121COA713 performance?
The FC pin on TC1121COA713 selects internal oscillator frequency: open = 10 kHz (50 µA IQ), tied to V+ = 200 kHz (higher IQ but enables smaller 10 µF external capacitors). FC has no effect when OSC is driven externally. This pin directly determines ripple frequency (fRIPPLE = fOSC/2) and capacitor sizing - critical for EMI-sensitive or space-constrained designs using TC1121COA713.
Is TC1121COA713 pin-compatible with other variants in the TC1121 family?
Yes, TC1121COA713 shares identical 8-pin SOIC pinout and electrical behavior with TC1121EOA, TC1121CPA, and TC1121EPA. Differences are limited to temperature grade (C = 0°C to +70°C) and packaging - all variants use the same FC/SHDN/OSC/CAP+/CAP–/VOUT/GND/V+ pin mapping. No PCB redesign is needed when substituting within the same package type.
What is the recommended capacitor type and value for TC1121COA713?
For TC1121COA713, use X5R or X7R ceramic capacitors: C1 (CAP+/CAP–) and C2 (VOUT/GND) both rated ≥10 µF at 10V. At 200 kHz (FC = V+), 10 µF suffices; at 10 kHz (FC open), 150–390 µF reduces ripple to 45–90 mV at 100 mA. Low-ESR (<0.2 Ω) is critical - especially for C1, where losses scale with 4× load current × ESR. Avoid electrolytics due to aging and ESR drift.
TC1121COA713 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TC1121COA713 FAQ
1.How can I place an order for TC1121COA713 through Aetrix?
Please submit a Request for Quotation (RFQ) for TC1121COA713 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 TC1121COA713 reliable?
The price and inventory of TC1121COA713 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC1121COA713 is usually 5 days.
3.What payment methods are accepted for TC1121COA713?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC1121COA713 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC1121COA713?
TC1121COA713 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC1121COA713 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 TC1121COA713?
For technical support, including TC1121COA713 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC1121COA713 requirements.
6.How does Aetrix verify that TC1121COA713 is sourced from the original manufacturer or authorized distributors?
All TC1121COA713 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 TC1121COA713 meets industry standards.
7.What is the process for return or replacement of TC1121COA713?
All TC1121COA713 units undergo pre-shipment inspection (PSI). If there is an issue with TC1121COA713, 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 TC1121COA713 part is unused and in its original packaging.
Return procedure for TC1121COA713:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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