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Microchip Technology TC7662BEPA
- Part No.:
- TC7662BEPA
- Manufacturer:
- Microchip Technology
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TC7662BEPA.pdf
- Description:
- IC REG CHARG PUMP INV 20MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:347
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Product details
Overview
TC7662BEPA from Microchip Technology is an 8-pin plastic DIP packaged charge pump DC-DC voltage converter that converts +1.5V to +15V input to corresponding –1.5V to –15V output using only two external capacitors, with 96% power efficiency at 5V/5kΩ load and 10kHz nominal oscillator frequency. It serves as a pin-compatible upgrade to ICL7660 in negative supply generation for RS232 interfaces and data acquisition systems.
For engineers reviewing the TC7662BEPA datasheet, TC7662BEPA pinout, TC7662BEPA application, or TC7662BEPA equivalent, this device offers verified boost-pin-enabled 35kHz operation, –40°C to +85°C extended temperature range, low 80µA typical supply current (boost open), and confirmed compatibility with polarized electrolytic capacitors in inverting configurations.
Technical Context
The TC7662BEPA integrates MOSFET-based charge pump switches (P-channel S1, N-channel S2–S4), on-chip RC oscillator with selectable frequency (10kHz default, 35kHz with BOOST pin tied to V+), and logic-controlled substrate bias network to prevent latch-up across its full operating range. Its internal voltage regulator is disabled via LV pin grounding for <3.5V inputs to optimize low-voltage performance.
Operation relies on capacitor charge-transfer cycling: C1 charges to V+ during first half-cycle (S1/S3 closed), then shifts negatively by V+ during second half-cycle (S2/S4 closed) to charge C2, achieving near-ideal voltage inversion when C1/C2 values and ESR are optimized per load and frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.5V to +15V - supports single-supply systems from low-power sensors to industrial 12V rails |
| Output Voltage Range | –1.5V to –15V - matches input magnitude with polarity inversion for bipolar rail generation |
| Oscillator Frequency | 10kHz (default), 35kHz (BOOST = V+) - enables smaller external capacitors or lower ripple |
| Power Efficiency | 96% at RL = 5kΩ - minimizes thermal load and extends battery life in portable instrumentation |
| Supply Current | 80µA typ. (BOOST open, 25°C) - ultra-low quiescent draw for always-on monitoring circuits |
| Output Source Resistance | 65Ω typ. (20mA, 0°C to +70°C) - defines voltage droop under load; reduced by paralleling devices |
| Operating Temperature | –40°C to +85°C - qualified for automotive cabin, industrial control, and outdoor embedded use |
Pinout & Package
TC7662BEPA uses an 8-pin plastic DIP package (0.300" width) with through-hole mounting, compatible with legacy ICL7660 PCB footprints and manual soldering processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency control input | Tie to V+ to raise oscillator frequency from 10kHz to 35kHz; reduces required C1/C2 size by ~3.5× |
| 2 (CAP+) | Pump capacitor positive terminal | Connects to + terminal of C1; critical path for charge transfer timing and efficiency |
| 3 (GND) | Ground reference | System return for all internal circuitry; must be low-impedance for stable oscillation |
| 4 (CAP–) | Pump capacitor negative terminal | Connects to – terminal of C1; completes charge-transfer loop with CAP+ |
| 5 (VOUT) | Negative output terminal | Delivers inverted voltage; output impedance depends on C1/C2 values, ESR, and fOSC |
| 6 (LV) | Low-voltage mode enable | Ground for V+ < 3.5V to disable internal regulator; leave open for V+ > 3.5V to prevent latch-up |
| 7 (OSC) | Oscillator timing node | External capacitor to ground lowers frequency (e.g., 100pF → 1kHz); unused in default operation |
| 8 (V+) | Positive supply input | Accepts 1.5–15V; powers internal logic and switches; absolute max 16.5V |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible ICL7660 replacement | Direct drop-in upgrade with identical footprint and function-no PCB changes required |
| Boost-pin frequency scaling | 35kHz operation enables 0.1µF capacitors instead of 10µF, reducing board area and cost in space-constrained designs |
| LV pin logic-selectable regulator | Grounding LV disables regulator for <3.5V inputs, improving efficiency and start-up reliability at low voltages |
| No-inductor architecture | Eliminates magnetic components, EMI concerns, and layout sensitivity-ideal for noise-sensitive analog signal chains |
| Latch-up protection circuitry | Active substrate bias control prevents destructive latch-up across full temperature and voltage range |
Applications
| RS232 Transceiver Power | Negative Supply for Data Acquisition |
|---|---|
Use Scenario: Generating –5V from a single +5V microcontroller supply to meet RS232 driver voltage requirements. IC Role / Device Role / Timing Role: Charge pump voltage inverter providing regulated negative rail for MAX232/MAX3232-level translation. Use Value: Eliminates need for dual-output DC-DC converters or transformer-based isolated supplies-reduces BOM count and layout complexity. |
Use Scenario: Creating symmetric ±5V rails for ADC front-end op-amps and sensor signal conditioning in portable test equipment. IC Role / Device Role / Timing Role: Negative voltage source enabling rail-to-rail input common-mode range and offset cancellation. Use Value: Achieves 96% efficiency at light loads, extending battery runtime while maintaining <120Ω output resistance up to 20mA. |
| Voltage Splitting for Single-Supply Systems | Positive Voltage Doubling |
Use Scenario: Deriving ±3.75V from a +7.5V battery supply to power op-amps in handheld medical monitors. IC Role / Device Role / Timing Role: Bidirectional charge pump configured as supply splitter to generate balanced rails without center-tapped transformers. Use Value: Enables high-current capability (lower RO than standard inverter mode) and eliminates need for precision resistive dividers or LDOs. |
Use Scenario: Generating +9V from +5V for LCD bias or op-amp headroom in compact consumer electronics. IC Role / Device Role / Timing Role: Reconfigured charge pump acting as voltage doubler using external diodes and capacitors. Use Value: Delivers ~60Ω output impedance at 10mA, supporting moderate-current analog functions without switching regulators. |
Availability
TC7662BEPA is available at Aetrix Electronics and suitable for RS232 interface design, portable data acquisition systems, and single-supply op-amp biasing requiring stable component supply across industrial temperature ranges.
Supply support for TC7662BEPA 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 global semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with emphasis on robust, low-power, and easy-to-integrate solutions for embedded applications.
The TC7662B product line was designed specifically to replace legacy ICL7660-based charge pumps with improved efficiency, wider voltage range, and enhanced latch-up immunity-targeting instrumentation, communications, and portable electronics.
FAQ
What is the maximum input voltage rating for TC7662BEPA?
The TC7662BEPA has an absolute maximum supply voltage of +16.5V. Operation above +15V is not recommended, as electrical characteristics are only specified up to +15V per the DS21469A datasheet. Exceeding +16.5V risks permanent damage due to internal junction breakdown or latch-up, regardless of duration or current limiting.
Can TC7662BEPA be used to generate positive voltage doubling?
Yes, TC7662BEPA can be configured for positive voltage doubling using external diodes and capacitors as shown in Figure 9 of DS21469A. In this mode, it delivers approximately (2 × V+) – (2 × VF), where VF is the combined forward voltage of two silicon diodes. Output impedance remains ~60Ω at 10mA with V+ = 5V.
How does the LV pin affect TC7662BEPA operation below 3.5V input?
For V+ < 3.5V, the LV pin must be grounded to disable the internal voltage regulator, which otherwise degrades low-voltage efficiency and start-up behavior. With LV = GND, TC7662BEPA achieves reliable operation down to +1.5V while maintaining 96% power efficiency and stable oscillation.
What external capacitors are required for basic TC7662BEPA operation?
TC7662BEPA requires exactly two external non-critical passive components: a pump capacitor (C1) between CAP+ and CAP– pins, and a reservoir capacitor (C2) between VOUT and GND. Typical values are 10µF polarized electrolytics; smaller values (e.g., 0.1µF) are viable when BOOST = V+ raises fOSC to 35kHz.
Is TC7662BEPA pin-compatible with ICL7660-based designs?
Yes, TC7662BEPA is fully pin-compatible with industry-standard ICL7660 devices in 8-pin DIP packages. It retains identical pinout, voltage ratings, and functional behavior while offering higher efficiency (96% vs. ~90%), wider input range (1.5–15V vs. 1.5–12V), and integrated latch-up protection-requiring no PCB modifications.
TC7662BEPA 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TC7662BEPA FAQ
1.How can I place an order for TC7662BEPA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC7662BEPA 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 TC7662BEPA reliable?
The price and inventory of TC7662BEPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC7662BEPA is usually 5 days.
3.What payment methods are accepted for TC7662BEPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC7662BEPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC7662BEPA?
TC7662BEPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC7662BEPA 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 TC7662BEPA?
For technical support, including TC7662BEPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC7662BEPA requirements.
6.How does Aetrix verify that TC7662BEPA is sourced from the original manufacturer or authorized distributors?
All TC7662BEPA 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 TC7662BEPA meets industry standards.
7.What is the process for return or replacement of TC7662BEPA?
All TC7662BEPA units undergo pre-shipment inspection (PSI). If there is an issue with TC7662BEPA, 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 TC7662BEPA part is unused and in its original packaging.
Return procedure for TC7662BEPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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