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Microchip Technology TC7662AEPA
- Part No.:
- TC7662AEPA
- Manufacturer:
- Microchip Technology
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TC7662AEPA.pdf
- Description:
- IC REG CHARG PUMP INV 40MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,559
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Product details
Overview
TC7662AEPA from Microchip Technology is a charge pump DC-DC voltage converter IC that inverts +3V to +18V input to produce corresponding -3V to -18V output, delivering up to 40mA output current with typical 40Ω output impedance at 20mA load and 12kHz internal oscillator frequency. It operates across -40°C to +85°C and requires only two external capacitors-no inductors or diodes-making it suitable for space-constrained portable power rails in microprocessor-based controllers and disk drives.
For engineers reviewing the TC7662AEPA datasheet, TC7662AEPA pinout, TC7662AEPA application, or TC7662AEPA equivalent, this device serves as a pin-compatible upgrade to TC7660/ICL7662 with extended input range, higher output current capability, and industrial temperature support-key selection criteria for negative rail generation in battery-powered instrumentation and embedded systems.
Technical Context
The TC7662AEPA implements a four-switch CMOS charge pump topology driven by an internal oscillator whose frequency can be reduced via external capacitor on OSC pin (Pin 7), enabling efficiency optimization at light loads. Its switching action alternates between charging CP from VDD and transferring inverted charge to CR, achieving voltage inversion without magnetic components.
Output impedance is determined by MOSFET ON-resistance (RSW), switching frequency, capacitor values, and ESR-typically 40Ω at 20mA/15V. The device supports multiple configurations including parallel operation for lower output resistance, cascading for multiplied negative outputs, and dual-mode use for simultaneous positive doubling and negative conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 18V - supports wide-range single-supply systems including 5V and 12V rails without external regulation. |
| Output Current | Up to 40mA - enables direct powering of analog circuitry, op-amp biasing, or low-power logic interfaces. |
| Oscillator Frequency | 12kHz nominal - fixed internal timing; adjustable downward with external capacitor on OSC pin for reduced quiescent current. |
| Output Impedance | 40Ω typ. @ IL = 20mA - defines voltage droop under load; critical for stable biasing in precision analog stages. |
| Voltage Efficiency | 99% typ. @ VDD = 15V, RL = ∞ - indicates minimal loss in open-circuit inversion; drops with load due to switch RDS(ON) and ESR. |
| Power Efficiency | 93–97% @ VDD = 15V, RL = 2kΩ - reflects usable energy transfer under moderate load; optimized with low-ESR capacitors. |
| Operating Temperature | -40°C to +85°C - qualified for industrial environments including process instrumentation and automotive body electronics. |
Pinout & Package
TC7662AEPA is housed in an 8-pin PDIP (Plastic Dual In-line Package) with 0.3-inch width, standard through-hole mounting, and commercial-to-industrial thermal performance (θJA = 140°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6 | NC | No internal connection; must remain unconnected to avoid parasitic coupling or latch-up risk. |
| 2 | C+ | Positive terminal of pump capacitor CP; connects to + side of polarized electrolytic used in standard inverter configuration. |
| 3 | GND | Ground reference for all internal circuitry and external capacitors; forms return path for charge transfer cycles. |
| 4 | C− | Negative terminal of pump capacitor CP; tied to GND in basic inverter mode; polarity reversal enables voltage inversion. |
| 5 | VOUT | Inverted output voltage node; delivers regulated negative rail; output impedance directly impacts load regulation. |
| 7 | OSC | Oscillator control input; bypassing to GND with external capacitor lowers switching frequency to reduce supply current at light loads. |
| 8 | VDD | Positive supply input; powers internal oscillator, level shifters, and switches; must be decoupled if source impedance >25Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Pin compatibility | Direct replacement for TC7660, ICL7662, SI7661, LTC1044 - enables drop-in upgrade without PCB revision. |
| No external diodes | Integrated CMOS switch array eliminates discrete diode losses and layout complexity in charge pump path. |
| Wide input range | 3V–18V operation supports legacy 5V systems and newer 12V/15V industrial rails without pre-regulation. |
| Adjustable oscillator | External capacitor on OSC pin allows frequency tuning from 12kHz down to ~2kHz - reduces idle current by >50%. |
| Low output impedance | 40Ω typical at 20mA enables stable ±5V or ±12V rails for op-amps, ADC references, and RS-232 drivers. |
Applications
| Laptop Power Management | Disk Drive Bias Supply |
|---|---|
Use Scenario: Generating -5V or -12V rail from main +5V or +12V battery/supply for LCD bias, op-amp offset, or interface ICs. IC Role / Device Role / Timing Role: Charge pump voltage inverter providing isolated negative rail without magnetics or high-EMI switching. Use Value: Enables compact, low-noise dual-rail operation in space-constrained clamshell designs with no inductor footprint or EMI filtering overhead. |
Use Scenario: Supplying negative voltage for head positioning servo amplifiers and spindle motor driver bias in 2.5″/3.5″ HDDs. IC Role / Device Role / Timing Role: High-efficiency DC-DC inverter delivering stable -5V at ≤30mA for analog front-end circuitry. Use Value: Eliminates need for separate negative supply transformer or linear regulator, reducing BOM cost and board area in high-volume storage modules. |
| Process Instrumentation | μP-Based Controllers |
Use Scenario: Creating precision -10V reference or bipolar supply for 4–20mA transmitter analog sections operating from 24V loop power. IC Role / Device Role / Timing Role: Low-drift, low-impedance negative voltage source supporting 16-bit DACs and instrumentation amplifiers. Use Value: Maintains <1% load regulation over -40°C to +85°C, ensuring measurement accuracy in field-deployed sensors and transmitters. |
Use Scenario: Providing -5V for RS-232 line drivers, EEPROM write voltage, or op-amp signal conditioning in PLC I/O modules and industrial microcontrollers. IC Role / Device Role / Timing Role: Robust charge pump converter tolerant of supply ripple and transient load steps in noisy factory environments. Use Value: Delivers reliable negative rail with no external diodes or inductors-reducing failure modes and simplifying CE/UL compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TC7660CPA | Narrower input range (1.5V–10V); max 20mA output; no OSC pin for frequency adjustment; 0°C to +70°C rating. | Suitable only for low-voltage, low-current, commercial-temp applications-cannot replace TC7662AEPA in industrial or 12V+ systems. | Select TC7660CPA only when cost is primary constraint and operating conditions fall strictly within its limited spec limits. |
| LTC1044CS8 | Same pinout; wider temp range (-40°C to +85°C); 20mA output; requires external diodes; 12kHz fixed oscillator. | Lacks integrated diode-free architecture and 40mA capability-requires additional components and cannot match TC7662AEPA's output drive. | Choose LTC1044CS8 only if legacy design reuse mandates identical footprint with diode-based topology and lower current demand. |
Compared with TC7660CPA and LTC1044CS8, the TC7662AEPA provides superior output current, broader input voltage support, and oscillator adjustability-making it the preferred choice for new industrial and portable designs requiring robust, component-minimized negative rail generation.
Availability
TC7662AEPA is available at Aetrix Electronics and suitable for laptop computers, disk drives, process instrumentation, and μP-based controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TC7662AEPA 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 leading provider of microcontrollers, analog devices, and power management ICs, headquartered in Chandler, Arizona, with global design and manufacturing operations certified to ISO/TS-16949.
The TC7662AEPA belongs to Microchip's legacy analog power conversion product line, designed specifically for low-noise, inductorless negative voltage generation in portable, industrial, and instrumentation applications where reliability and simplicity are critical.
FAQ
What is the maximum output current specification for TC7662AEPA?
The TC7662AEPA is rated for up to 40mA of continuous output current under typical conditions (VDD = 15V, TA = +25°C). This value decreases at higher temperatures or lower input voltages due to internal power dissipation limits and switch RDS(ON) increase. Derating curves in the datasheet show 30mA sustainable at 85°C ambient with 15V input.
Does TC7662AEPA require external diodes for basic inverting operation?
No, the TC7662AEPA does not require external diodes. It integrates a fully CMOS-based four-switch charge pump architecture that replaces discrete diodes with low-RDS(ON) MOSFETs-eliminating forward voltage drop, leakage, and thermal concerns associated with external diode solutions.
Can TC7662AEPA generate positive voltage doubling as well as negative inversion?
Yes, the TC7662AEPA supports positive voltage doubling using an external diode configuration (Figure 4-6 in DS21468B). In this mode, it delivers approximately (2 × VDD) – (2 × VF) at VOUT, with output impedance around 60Ω at 10mA load and 5V input-enabling dual-rail generation from a single supply.
What is the function of the OSC pin (Pin 7) on TC7662AEPA?
The OSC pin on TC7662AEPA controls the internal oscillator frequency. Connecting an external capacitor from Pin 7 to GND lowers the nominal 12kHz frequency-e.g., 100pF reduces it to ~2kHz-reducing supply current at light loads while requiring proportionally larger CP and CR capacitors to maintain output impedance and ripple performance.
Is TC7662AEPA pin-compatible with the older TC7660 series?
Yes, TC7662AEPA is fully pin-compatible with TC7660, ICL7662, SI7661, and LTC1044 in 8-pin PDIP and CERDIP packages. All share identical pin numbering, functions, and footprint-allowing direct replacement without layout changes, provided the wider input range and higher output current of TC7662AEPA are leveraged in the design.
TC7662AEPA 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:
- 40mA
- Frequency - Switching:
- 12kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TC7662AEPA FAQ
1.How can I place an order for TC7662AEPA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC7662AEPA 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 TC7662AEPA reliable?
The price and inventory of TC7662AEPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC7662AEPA is usually 5 days.
3.What payment methods are accepted for TC7662AEPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC7662AEPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC7662AEPA?
TC7662AEPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC7662AEPA 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 TC7662AEPA?
For technical support, including TC7662AEPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC7662AEPA requirements.
6.How does Aetrix verify that TC7662AEPA is sourced from the original manufacturer or authorized distributors?
All TC7662AEPA 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 TC7662AEPA meets industry standards.
7.What is the process for return or replacement of TC7662AEPA?
All TC7662AEPA units undergo pre-shipment inspection (PSI). If there is an issue with TC7662AEPA, 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 TC7662AEPA part is unused and in its original packaging.
Return procedure for TC7662AEPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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