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Microchip Technology TC962EPA
- Part No.:
- TC962EPA
- Manufacturer:
- Microchip Technology
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TC962EPA.pdf
- Description:
- IC REG CHARG PUMP INV 80MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,710
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Product details
Overview
TC962EPA from Microchip Technology is a high-current CMOS charge pump DC-to-DC inverter IC capable of delivering up to 80 mA output current, operating from 3V to 18V input, with 28 Ω typical output impedance and integrated 6.4 V Zener reference on Pin 1 - used in portable instrumentation and μP-based controllers requiring compact negative voltage generation without external diodes.
For engineers reviewing the TC962EPA datasheet, TC962EPA pinout, TC962EPA application, or TC962EPA equivalent, this page delivers verified electrical parameters, thermal range validation (-40°C to +85°C), oscillator frequency control logic (FREQ×2 pin), Zener reference use case, and real-world inverter design constraints including capacitor sizing and efficiency trade-offs at varying load currents.
Technical Context
The TC962EPA implements a four-switch capacitive charge pump topology with internal level-shifted MOSFET drivers synchronized to a 12 kHz (or 24 kHz when Pin 6 is grounded) oscillator. Its CMOS architecture eliminates the need for external diodes and removes the low-voltage terminal required by legacy TC7662 designs.
Pin 1 provides a 6.4 V Zener cathode (5 mA, 12 Ω dynamic impedance) for external regulator biasing; Pin 6 enables oscillator doubling; Pin 7 accepts an external timing capacitor to reduce frequency. The device achieves 97% power conversion efficiency at 2 kΩ load and maintains stable inversion across its full -40°C to +85°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 80 mA max - supports higher load demands than TC7662 (20 mA), enabling single-chip supply for dual-rail analog circuitry. |
| Input Voltage Range | 3V to 18V - accommodates wide battery and rail voltages without external regulation. |
| Output Impedance | 28 Ω typ. at 15V/20mA - ensures low dropout under moderate loads; critical for stable feedback in op-amp bias networks. |
| Oscillator Frequency | 12 kHz (Pin 6 open) or 24 kHz (Pin 6 grounded) - higher frequency allows smaller external pump capacitors (e.g., 10 µF instead of 22 µF) for same ripple. |
| Zener Reference | 6.4 V ±0.2 V at 5 mA, 12 Ω dynamic impedance - usable as precision bias source for external LDOs or comparator references. |
| Power Efficiency | 97% typ. at RL = 2 kΩ - minimizes heat rise in enclosed portable systems; validated over full industrial temperature range. |
| Absolute Max Supply | +18 V - defines safe operating ceiling; exceeds typical 15 V rail, allowing margin for transient spikes. |
Pinout & Package
TC962EPA uses an 8-pin Plastic DIP package (0.300" width), rated for -40°C to +85°C operation. Pin layout matches industry-standard TC7662 footprint, enabling drop-in replacement in existing designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Zener Cathode | Provides 6.4 V reference; must be connected to ground through external load or regulator to sink 5 mA; dynamic impedance 12 Ω enables stable feedback. |
| 2 | C+ | Positive terminal of external pump capacitor (CP); switches between VDD and VOUT during charge-transfer cycles. |
| 3 | GND | System ground reference; all internal logic and oscillator circuits referenced here; requires low-impedance connection. |
| 4 | C− | Negative terminal of external pump capacitor (CP); alternately charged/discharged to generate inverted output. |
| 5 | VOUT | Inverted output voltage (e.g., −5 V from +5 V input); sourced up to 80 mA with 28 Ω effective impedance. |
| 6 | FREQ × 2 | Grounding enables 24 kHz oscillator mode; open-circuit defaults to 12 kHz; no pull-up required. |
| 7 | COSC | Connects external timing capacitor to GND; larger capacitance lowers oscillator frequency below 12 kHz baseline. |
| 8 | VDD | Positive input supply (3–18 V); powers internal oscillator, logic, and switch drivers; bypass capacitor recommended. |
Key Features
| Feature | Design Value |
|---|---|
| No external diodes required | Integrated CMOS switch array replaces discrete diode pumps, reducing BOM count and PCB area by >3 components per channel. |
| Pin-compatible with TC7662/ICL7662/SI7661 | Direct physical and functional replacement in legacy designs; no PCB rework needed for upgrade path. |
| On-chip 6.4 V Zener reference | Enables self-contained biasing of external linear regulators or precision comparators without adding discrete Zener or reference IC. |
| Dual-frequency oscillator (12/24 kHz) | Allows optimization between capacitor size (24 kHz → smaller CP/CR) and EMI profile (12 kHz → lower switching noise). |
| 97% power conversion efficiency | Reduces thermal load in space-constrained applications like disk drive controllers and handheld test equipment. |
Applications
| Portable Instrumentation | μP-Based Controllers |
|---|---|
Use Scenario: Battery-powered handheld multimeters and signal generators requiring clean ±5 V rails from single 9 V battery. IC Role / Device Role / Timing Role: Inverting charge pump generating negative supply for op-amp input stages and ADC reference buffers. Use Value: Eliminates need for bulky inductive DC/DC converters; 80 mA output sustains simultaneous analog front-end and display driver loads. |
Use Scenario: Industrial PLC I/O modules using 8-bit microcontrollers with analog sensor interfaces. IC Role / Device Role / Timing Role: Negative voltage source for RS-232 transceivers and op-amp level-shifting circuits. Use Value: Integrated Zener reference (Pin 1) supplies stable bias to external LDOs powering MCU core, improving supply rejection. |
| Laptop Peripherals | Disk Drive Electronics |
Use Scenario: USB-connected docking stations needing isolated analog audio paths and sensor biasing. IC Role / Device Role / Timing Role: Compact inverter supplying −3.3 V for audio codec bias and sensor excitation. Use Value: 24 kHz FREQ×2 mode enables 4.7 µF pump caps - reduces board area vs. legacy 10 µF solutions while maintaining <10 mV ripple. |
Use Scenario: 2.5-inch HDD servo control boards operating from 5 V bus with analog head positioning circuitry. IC Role / Device Role / Timing Role: High-current inverter powering voice coil motor drivers and preamplifier stages. Use Value: 28 Ω output impedance ensures minimal voltage sag during 60 mA peak servo pulses, preserving positioning accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC7662CPA | 20 mA max output current; requires external low-voltage terminal (Pin 6); no on-chip Zener; 12 kHz fixed oscillator. | Lower current capability limits use to light-load analog sections; lacks Zener reference for regulator biasing. | Select when cost sensitivity outweighs performance needs and existing layout uses TC7662 footprint. |
| LTC1044CN8#PBF | 40 mA output; 10 kHz oscillator; no Zener; requires external timing capacitor; wider supply range (1.5–20 V). | Suitable for ultra-low-voltage systems (<3 V); less efficient at 15 V input due to higher quiescent current (1.2 mA vs. TC962EPA's 510 µA). | Prefer for sub-3 V battery applications where TC962EPA's 3 V minimum is limiting. |
Compared with TC7662CPA and LTC1044CN8#PBF, the TC962EPA delivers 4× higher output current, integrated Zener reference, and selectable oscillator frequency - making it optimal for space-constrained industrial and portable systems demanding both performance headroom and design flexibility.
Availability
TC962EPA is available at Aetrix Electronics and suitable for portable instrumentation, μP-based controllers, and disk drive electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TC962EPA 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 interface ICs, with ISO/TS-16949 certified manufacturing and global technical support infrastructure.
The TC962EPA belongs to Microchip's high-efficiency charge pump converter product line, designed specifically for compact, diodeless negative voltage generation in battery-powered and industrial control systems where reliability and thermal robustness are critical.
FAQ
What is the maximum output current specification for the TC962EPA?
The TC962EPA is rated for up to 80 mA of continuous output current when operating within its specified input voltage (3–18 V) and temperature (-40°C to +85°C) ranges. This value is confirmed in the Electrical Characteristics table on DS21484D-page 3, where RO (output source resistance) is characterized at 80 mA load. It significantly exceeds the 20 mA capability of the legacy TC7662, enabling more demanding analog circuitry to be powered directly from the TC962EPA without additional regulation stages.
Does the TC962EPA require external diodes for operation?
No, the TC962EPA does not require external diodes. Its internal CMOS switch architecture replaces traditional diode-capacitor charge pump topologies. As stated in the Features section of DS21484D-page 1, "No External Diodes Required" is a key differentiator. The four internal MOSFET switches (SW1–SW4) handle charge transfer between the external pump (CP) and reservoir (CR) capacitors, eliminating conduction losses and layout complexity associated with discrete diodes.
How does the FREQ × 2 pin (Pin 6) affect TC962EPA operation?
Grounding Pin 6 of the TC962EPA doubles the internal oscillator frequency from 12 kHz to 24 kHz, as documented in Table 2-1 (DS21484D-page 4) and Section 3.1. This higher frequency allows smaller external pump and reservoir capacitors to achieve the same output ripple and current delivery - for example, halving capacitor values while maintaining performance. Leaving Pin 6 open retains the default 12 kHz mode, which may be preferred for lower EMI in noise-sensitive applications.
What is the purpose and specification of the Zener cathode on Pin 1 of the TC962EPA?
Pin 1 of the TC962EPA is the cathode of an integrated 6.4 V Zener diode, specified at 5 mA with a dynamic impedance of 12 Ω (DS21484D-page 3, VZ and ZZT parameters). It is intended to provide a stable reference voltage for external regulator circuitry - such as biasing the error amplifier in a discrete LDO - without requiring a separate reference IC. The Zener operates only when current is sunk through Pin 1 to ground, and its low impedance ensures minimal drift under varying load conditions.
Is the TC962EPA pin-compatible with the TC7662CPA?
Yes, the TC962EPA is fully pin-compatible with the TC7662CPA in the 8-pin DIP package, as confirmed in the Features section ("Pin Compatible With TC7662/ICL7662/SI7661") and Pin Descriptions table (DS21484D-page 4). Both share identical pin numbering, function mapping, and mechanical footprint. However, the TC962EPA improves upon the TC7662CPA by removing the requirement for a low-voltage terminal (Pin 6 repurposed as FREQ×2), integrating the Zener reference (Pin 1), and quadrupling output current capability - enabling direct drop-in upgrades in most legacy designs.
TC962EPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 80mA
- Frequency - Switching:
- 12kHz ~ 24kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TC962EPA FAQ
1.How can I place an order for TC962EPA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC962EPA 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 TC962EPA reliable?
The price and inventory of TC962EPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC962EPA is usually 5 days.
3.What payment methods are accepted for TC962EPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC962EPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC962EPA?
TC962EPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC962EPA 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 TC962EPA?
For technical support, including TC962EPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC962EPA requirements.
6.How does Aetrix verify that TC962EPA is sourced from the original manufacturer or authorized distributors?
All TC962EPA 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 TC962EPA meets industry standards.
7.What is the process for return or replacement of TC962EPA?
All TC962EPA units undergo pre-shipment inspection (PSI). If there is an issue with TC962EPA, 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 TC962EPA part is unused and in its original packaging.
Return procedure for TC962EPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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