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Microchip Technology TC7662BCPA
- Part No.:
- TC7662BCPA
- Manufacturer:
- Microchip Technology
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TC7662BCPA.pdf
- Description:
- IC REG CHARG PUMP INV 20MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,167
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Product details
Overview
TC7662BCPA from Microchip Technology is an 8-pin DIP charge pump DC-DC voltage converter that inverts +1.5V to +15V input to –1.5V to –15V output using only two external capacitors-no inductor required. It features a nominal 10 kHz oscillator (35 kHz with BOOST pin tied to V+), 96% power efficiency at 5V/5kΩ, and operates across 0°C to +70°C. It serves as a pin-compatible upgrade to the ICL7660 in RS-232 power supplies and data acquisition systems.
For engineers reviewing the TC7662BCPA datasheet, TC7662BCPA pinout, TC7662BCPA application, or TC7662BCPA equivalent, this device offers verified inverting conversion with low quiescent current (80 µA typ.), adjustable oscillator frequency, LV pin control for low-voltage operation, and validated performance in ±5V generation and supply splitting topologies.
Technical Context
The TC7662BCPA integrates MOSFET switches (P-channel S1; N-channel S2–S4), an RC oscillator with BOOST pin frequency scaling, internal voltage regulator with LV pin disable, and logic-controlled substrate biasing to prevent latch-up. Its charge-transfer architecture eliminates magnetic components while maintaining stable inversion under load.
It supports three oscillator modes: free-running (10 kHz), BOOST-enabled (35 kHz), and externally clocked (half-frequency injection via OSC pin). Output impedance is dynamically influenced by C1/C2 values, ESR, switching frequency, and temperature-dependent switch resistance (23 Ω typ. at 25°C/5V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.5V to +15V - supports single-supply battery and logic rails without external regulation |
| Oscillator Frequency | 10 kHz (free-run) or 35 kHz (BOOST = V+) - enables smaller external capacitors (e.g., 0.1 µF) in space-constrained designs |
| Power Efficiency | 96% typical at RL = 5 kΩ - minimizes thermal rise and extends battery life in portable instrumentation |
| Supply Current | 80 µA typical (BOOST open), 300 µA max (BOOST = V+) - ultra-low quiescent draw critical for always-on sensor nodes |
| Output Source Resistance | 65 Ω typical (20 mA, 0°C to +70°C) - defines voltage droop under dynamic load; scalable via paralleling multiple units |
| Voltage Conversion Efficiency | 99.9% no-load - near-ideal charge transfer enables precision negative biasing in op-amp and ADC reference circuits |
| Operating Temperature | 0°C to +70°C - commercial-grade stability suitable for industrial control panels and test equipment |
Pinout & Package
TC7662BCPA is housed in an 8-pin plastic dual in-line package (PDIP) with 0.3-inch body width and standard through-hole footprint compatible with legacy ICL7660 layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency control input | Tying to V+ raises oscillator frequency from 10 kHz to 35 kHz, reducing required capacitor size and output impedance |
| 2 (CAP+) | Pump capacitor positive terminal | Connects to + terminal of C1; charges to V+ during first half-cycle, then transfers charge to CAP– during inversion |
| 3 (GND) | Ground reference | System ground return for internal regulator, oscillator, and switch substrates; must be low-impedance |
| 4 (CAP–) | Pump capacitor negative terminal | Connects to – terminal of C1; forms charge-transfer path with CAP+ and internal switches |
| 5 (VOUT) | Negative output terminal | Delivers inverted output (–V+) referenced to GND; output impedance depends on C1/C2, ESR, and fOSC |
| 6 (LV) | Low-voltage mode enable | Connecting to GND disables internal regulator for improved efficiency below 3.5V input; must be open above 3.5V |
| 7 (OSC) | Oscillator timing node | Accepts external capacitor to ground for <10 kHz operation or external CMOS clock (via 1 kΩ series resistor) |
| 8 (V+) | Positive supply input | Primary power rail; absolute max rating +16.5V; must be stabilized with local bypass if source impedance >25 Ω |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless charge pump topology | Eliminates EMI, cost, and board area associated with magnetic components-ideal for compact PCBs and noise-sensitive analog systems |
| Pin-compatible ICL7660 replacement | Direct drop-in upgrade with identical pinout and footprint-no layout changes required for legacy designs |
| Adjustable oscillator frequency | Three modes (10 kHz / 35 kHz / external clock) allow trade-offs between capacitor size, ripple, efficiency, and EMI profile |
| LV pin for low-voltage optimization | Disabling internal regulator below 3.5V improves conversion efficiency and extends usable range down to 1.5V input |
| Robust latch-up protection | Integrated substrate bias control and voltage regulator prevent destructive latch-up across full temp/voltage range |
Applications
| RS-232 Transceiver Power | Negative Supply for Data Acquisition |
|---|---|
|
Use Scenario: Generating –5V from a single +5V logic supply to meet RS-232 driver level requirements (±5V to ±15V). IC Role / Device Role / Timing Role: Inverting voltage converter providing isolated negative rail with no external inductor or transformer. Use Value: Enables single-rail microcontroller systems to drive RS-232 interfaces without additional DC-DC modules or split supplies. |
Use Scenario: Providing clean –5V bias for op-amps, ADC references, and sensor signal conditioning in portable test equipment. IC Role / Device Role / Timing Role: Low-noise negative voltage source with 99.9% no-load conversion efficiency and minimal ripple when paired with low-ESR capacitors. Use Value: Maintains analog accuracy by minimizing supply-induced offset drift and common-mode error in precision measurement front-ends. |
| Supply Splitting for Bipolar Op-Amps | Positive/Negative Dual-Rail Generation |
|
Use Scenario: Deriving ±V+/2 from a single higher-voltage supply (e.g., +12V → ±6V) to power rail-to-rail op-amps in audio or signal processing circuits. IC Role / Device Role / Timing Role: Bidirectional charge pump configured as a virtual ground splitter with matched load sharing across both halves. Use Value: Achieves lower output impedance than standard inverter configurations-supports higher load currents (e.g., >20 mA per rail) without external regulators. |
Use Scenario: Simultaneously generating –5V and +10V from a +5V input for mixed-signal systems requiring asymmetric dual supplies (e.g., +9V/–5V). IC Role / Device Role / Timing Role: Dual-function implementation using shared pump node (CAP+) and separate reservoir paths for independent positive doubling and negative inversion. Use Value: Reduces component count versus discrete solutions-only four external capacitors needed for two regulated rails with predictable source impedances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660CPA | Legacy 8-pin DIP; 10 kHz fixed oscillator; no BOOST pin; 90% typical efficiency; higher quiescent current (120 µA typ.) | Lacks frequency scaling and LV control-unsuitable for low-voltage (<3.5V) or low-ripple designs requiring 35 kHz operation | Select ICL7660CPA only for cost-sensitive, non-upgradable legacy replacements where BOOST and LV features are unused. |
| MAX680CPA | 8-pin DIP; 100 kHz oscillator; requires no BOOST pin; 95% efficiency; integrated oscillator capacitor; higher supply current (250 µA typ.) | Higher switching frequency enables smaller capacitors but increases EMI sensitivity; no LV pin for sub-3.5V operation | Choose MAX680CPA when ultra-compact capacitor footprints are prioritized over low-quiescent-current operation or wide input range. |
Compared with ICL7660CPA and MAX680CPA, TC7662BCPA uniquely balances low quiescent current (80 µA), adjustable frequency (10/35 kHz), and LV-enabled 1.5V operation-making it optimal for battery-powered instrumentation requiring flexible, efficient dual-rail generation.
Availability
TC7662BCPA is available at Aetrix Electronics and suitable for RS-232 interface design, portable data acquisition systems, and bipolar op-amp supply splitting requiring stable component supply and long-term obsolescence management.
Supply support for TC7662BCPA 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 broad industrial and automotive qualification.
The TC7662B product line was designed specifically for inductorless voltage inversion in space-constrained, low-power analog and interface applications-targeting RS-232, sensor signal chains, and portable instrumentation.
FAQ
What is the maximum input voltage supported by the TC7662BCPA?
The TC7662BCPA has an absolute maximum supply voltage rating of +16.5V. Its specified operating input range is +1.5V to +15V. Operation above +15V risks exceeding safe operating limits and may cause permanent damage. The device includes internal protection against latch-up, but sustained overvoltage beyond +16.5V violates Absolute Maximum Ratings and voids reliability guarantees for TC7662BCPA.
Can the TC7662BCPA generate voltages other than –VIN?
Yes, the TC7662BCPA supports multiple configurations beyond basic inversion. When cascaded, it achieves –nVIN (e.g., –2VIN with two units). In positive-doubling mode (using external diodes), it delivers +(2VIN – 2VF). In voltage-splitting mode, it produces ±VIN/2. All variants rely on the same internal charge-pump core and require appropriate external passive networks-TC7662BCPA remains the central active element in each case.
How does the LV pin affect TC7662BCPA performance below 3.5V input?
Connecting the LV pin to GND disables the internal voltage regulator in TC7662BCPA, reducing power loss and enabling reliable operation down to +1.5V input. Above +3.5V, leaving LV open ensures latch-up immunity by maintaining proper substrate bias. This dual-mode behavior makes TC7662BCPA uniquely capable across the full 1.5V–15V range-unlike fixed-regulator alternatives.
Is the TC7662BCPA pin-compatible with the ICL7660CPA?
Yes, TC7662BCPA is fully pin-compatible with ICL7660CPA in the 8-pin DIP package: identical pin numbering, function mapping, and footprint. It requires no PCB modifications for drop-in replacement. Key enhancements-including BOOST pin functionality, LV control, and improved efficiency-are implemented without altering mechanical or electrical interface compatibility for TC7662BCPA.
What external components are mandatory for basic TC7662BCPA operation?
Two external capacitors are mandatory: a pump capacitor (C1) between CAP+ (pin 2) and CAP– (pin 4), and a reservoir capacitor (C2) between VOUT (pin 5) and GND (pin 3). Typical values are 10 µF polarized electrolytics. No diodes, inductors, or resistors are required for standard inverting operation-TC7662BCPA integrates all active circuitry needed for charge transfer and regulation.
TC7662BCPA 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):
- 1.5V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 20mA
- Frequency - Switching:
- 10kHz ~ 35kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TC7662BCPA FAQ
1.How can I place an order for TC7662BCPA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC7662BCPA 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 TC7662BCPA reliable?
The price and inventory of TC7662BCPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC7662BCPA is usually 5 days.
3.What payment methods are accepted for TC7662BCPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC7662BCPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC7662BCPA?
TC7662BCPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC7662BCPA 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 TC7662BCPA?
For technical support, including TC7662BCPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC7662BCPA requirements.
6.How does Aetrix verify that TC7662BCPA is sourced from the original manufacturer or authorized distributors?
All TC7662BCPA 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 TC7662BCPA meets industry standards.
7.What is the process for return or replacement of TC7662BCPA?
All TC7662BCPA units undergo pre-shipment inspection (PSI). If there is an issue with TC7662BCPA, 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 TC7662BCPA part is unused and in its original packaging.
Return procedure for TC7662BCPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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