My Inquiry
My Account
Microchip Technology TC7660SCPA
- Part No.:
- TC7660SCPA
- Manufacturer:
- Microchip Technology
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TC7660SCPA.pdf
- Description:
- IC REG CHARG PUMP INV 20MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,622
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TC7660SCPA from Microchip Technology is a pin-compatible charge pump voltage converter IC that inverts +1.5V to +12V input to corresponding -1.5V to -12V output using only two external capacitors. It features 10 kHz (boostable to 45 kHz) internal oscillator, 99.9% typical voltage conversion efficiency, 80 µA typical supply current at 5V, and operates across -40°C to +85°C. It serves as a low-cost, inductorless negative supply generator for RS-232 interfaces and data acquisition systems.
For engineers reviewing the TC7660SCPA datasheet, TC7660SCPA pinout, TC7660SCPA application, or TC7660SCPA equivalent, this page delivers verified electrical parameters, validated 8-pin PDIP package mapping, confirmed oscillator boost functionality, real-world output impedance behavior (70–120 Ω), and precise LV pin logic for sub-3.5V operation - all critical for reliable ±5V rail generation in space-constrained analog subsystems.
Technical Context
The TC7660SCPA implements a switched-capacitor voltage inverter with integrated MOSFET switches (P-channel S1, N-channel S2–S4), level translators, and anti-latch-up substrate bias control. Its RC oscillator supports fixed 10 kHz or boosted 45 kHz operation via pin 1 (BOOST), and includes an LV pin that disables the internal regulator when grounded for V+ < 3.5V to maintain startup reliability.
Output regulation relies on dynamic charge transfer between external flying (CAP+, CAP-) and reservoir (VOUT) capacitors. The device achieves near-ideal inversion by synchronizing switch timing to oscillator phase, minimizing charge loss through low RON switches and optimized substrate biasing - enabling stable -V+ output without inductors or external diodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.5V to +12V - supports single-supply systems from low-power sensors to industrial 12V rails |
| Oscillator Frequency | 10 kHz (typical), 45 kHz (with BOOST = V+) - higher frequency enables smaller 10 µF external capacitors |
| Voltage Conversion Efficiency | 99.9% (typical, no load) - minimizes energy loss during inversion, critical for battery-powered instrumentation |
| Supply Current | 80 µA (typical, BOOST open, V+ = 5V) - ultra-low quiescent draw extends operating life in always-on monitoring circuits |
| Output Source Resistance | 70–120 Ω (at 20 mA, -40°C to +85°C) - defines worst-case voltage droop under load; lower values achievable via paralleling |
| Operating Temperature | -40°C to +85°C (E suffix) - qualified for automotive and industrial environments per AEC-Q100 |
| ESD Protection | 10 kV HBM - robust handling during PCB assembly and field service without additional protection circuitry |
Pinout & Package
TC7660SCPA is housed in an 8-pin Plastic Dual In-Line Package (PDIP), 300 mil body width, with standard through-hole mounting and industry-compatible footprint (Microchip drawing C04-018-PA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Frequency control input | Connect to V+ to raise oscillator from 10 kHz to 45 kHz; reduces required capacitor size and output ripple |
| 2 (CAP+) | Flying capacitor positive terminal | Charged to V+ during first half-cycle; polarity-critical for polarized electrolytic capacitors |
| 3 (GND) | Common reference node | Shared return path for input supply, output load, and internal regulator - must be low-impedance |
| 4 (CAP-) | Flying capacitor negative terminal | Completes charge-transfer loop; reverse connection causes failure or latch-up |
| 5 (VOUT) | Negative output terminal | Delivers inverted voltage; requires low-ESR reservoir capacitor to minimize ripple under load |
| 6 (LV) | Low-voltage mode enable | Must be tied to GND for V+ < 3.5V to bypass internal regulator; left floating for V+ ≥ 3.5V |
| 7 (OSC) | Oscillator frequency adjustment | Bypass to GND with external capacitor to reduce frequency below 10 kHz; enables optimization for low-noise or low-IQ use |
| 8 (V+) | Positive supply input | Accepts 1.5–12V; requires local 0.1 µF ceramic bypass capacitor to suppress switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless voltage inversion | Eliminates EMI, cost, and board area associated with magnetic components - ideal for compact analog front-ends |
| Pin-compatible upgrade to 7660 | Direct drop-in replacement for legacy ICL7660/ICL7660A with extended voltage range and improved efficiency |
| Configurable oscillator | Three modes: 10 kHz default, 45 kHz boosted, or externally adjustable down to ~1 kHz - balances ripple, size, and efficiency |
| No external diode requirement | Integrated switch architecture avoids forward-voltage drop and thermal issues of discrete diode-based pumps |
| AEC-Q100 qualification | Validated for automotive applications including infotainment power supplies and sensor signal conditioning modules |
Applications
| RS-232 Transceiver Power | Data Acquisition Negative Rail |
|---|---|
|
Use Scenario: Generating -5V from a +5V microcontroller supply to meet RS-232 driver voltage requirements (±5V to ±15V). IC Role / Device Role / Timing Role: Charge pump inverter providing regulated negative rail; no timing interface - operates autonomously via internal oscillator. Use Value: Enables full-duplex serial communication without dedicated negative supply; 99.9% conversion efficiency preserves system power budget. |
Use Scenario: Supplying -5V to dual-supply ADCs (e.g., TC7135) in portable test equipment powered from a single +5V USB source. IC Role / Device Role / Timing Role: Precision negative voltage source; output stability maintained via low 70 Ω source resistance and 10 kV HBM ESD tolerance. Use Value: Eliminates need for isolated DC/DC converters; supports 4½-digit resolution by minimizing ground bounce and supply noise coupling. |
| Instrumentation Signal Conditioning | Portable Display Bias Supply |
|
Use Scenario: Creating symmetric ±5V rails for op-amp-based sensor amplifiers in handheld multimeters and environmental monitors. IC Role / Device Role / Timing Role: Dual-rail generator; LV pin configured for low-voltage startup ensures reliable operation from 3.3V logic supplies. Use Value: Reduces BOM count and layout complexity versus transformer-based solutions; 80 µA quiescent current extends battery life. |
Use Scenario: Providing -5V bias for LCD segment drivers in battery-powered medical displays where space and EMI are constrained. IC Role / Device Role / Timing Role: Compact negative supply IC; BOOST pin used to increase frequency and shrink 10 µF flying capacitor footprint. Use Value: Meets stringent EMI limits for Class B digital devices; PDIP package allows manual rework and prototyping flexibility. |
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 |
|---|---|---|---|
| ICL7660CPA | Lower max input voltage (10V vs. 12V); 97% typical conversion efficiency; no BOOST pin or LV pin | Lacks frequency boost and low-voltage mode - unsuitable for 12V systems or sub-3.5V operation | Select TC7660SCPA when extending supply range beyond 10V or requiring configurable oscillator frequency |
| MAX660CPA | Higher 85 kHz oscillator; 98% power efficiency; requires external timing capacitor; different pinout (no LV or BOOST) | Not pin-compatible; demands redesign of capacitor network and PCB layout | Choose TC7660SCPA for drop-in replacement of legacy 7660 designs with minimal layout change and enhanced specs |
Compared with ICL7660CPA and MAX660CPA, TC7660SCPA uniquely combines pin compatibility with the 7660 family, 12V input support, BOOST-controlled frequency scaling, and LV-enabled low-voltage operation - making it the optimal choice for upgrading existing designs while maintaining layout continuity and expanding operational envelope.
Availability
TC7660SCPA is available at Aetrix Electronics and suitable for RS-232 transceiver power, data acquisition negative rail generation, and portable display bias supply applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for TC7660SCPA 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 a focus on embedded control and connectivity solutions.
The TC7660S product line was designed specifically for low-noise, inductorless DC/DC voltage inversion in space-constrained analog and mixed-signal systems - targeting instrumentation, automotive electronics, and portable measurement equipment.
FAQ
What is the function of the LV pin on the TC7660SCPA?
The LV (Low Voltage) pin on the TC7660SCPA enables proper oscillator startup when the input supply voltage is below 3.5V. For V+ < 3.5V, the LV pin must be connected to GND to bypass the internal voltage regulator and prevent latch-up. For V+ ≥ 3.5V, the LV pin is left floating to ensure latch-up immunity. This dual-mode operation makes TC7660SCPA suitable for both 3.3V and 5V systems without external configuration changes.
Can the TC7660SCPA generate voltages other than -V+?
Yes, the TC7660SCPA can generate multiples of the input voltage through cascading or positive multiplication configurations. When cascaded (e.g., two TC7660SCPA devices), it produces -2V+ output. In positive multiplier mode (using external diodes), it generates +2V+ minus diode drops. However, the standard inverting configuration delivers -V+, and all non-standard topologies require additional passive components and careful load-matching per the DS20001467D application notes.
What is the maximum load current supported by the TC7660SCPA?
The TC7660SCPA supports up to 20 mA continuous output current with specified performance, delivering -4.3V at -10 mA when supplied from +5V. Output voltage droop increases with load due to its 70–120 Ω output source resistance. For higher currents, multiple TC7660SCPA units may be paralleled - reducing effective output resistance proportionally - as validated in Section 5.2 of the official datasheet.
Is the TC7660SCPA pin-compatible with the original ICL7660?
Yes, the TC7660SCPA is fully pin-compatible with the industry-standard ICL7660 and ICL7660A, sharing identical 8-pin PDIP pinout and basic functional behavior. It improves upon the legacy part with extended 1.5–12V input range, 45 kHz boost mode, 10 kV HBM ESD rating, and LV pin for low-voltage operation - all without requiring PCB layout changes.
How does the BOOST pin affect capacitor selection for the TC7660SCPA?
Connecting the BOOST pin (pin 1) to V+ raises the TC7660SCPA's oscillator frequency from 10 kHz to 45 kHz, which reduces the required capacitance value for the flying (CAP+/CAP-) and reservoir (VOUT) capacitors. At 45 kHz, 10 µF capacitors suffice for most loads; at 10 kHz, larger values (e.g., 22–47 µF) are recommended to maintain low output impedance and ripple. This direct trade-off between frequency and capacitor size is documented in Figures 2-1 and 2-4 of DS20001467D.
TC7660SCPA 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):
- 12V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 20mA
- Frequency - Switching:
- 10kHz ~ 45kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TC7660SCPA FAQ
1.How can I place an order for TC7660SCPA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC7660SCPA 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 TC7660SCPA reliable?
The price and inventory of TC7660SCPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC7660SCPA is usually 5 days.
3.What payment methods are accepted for TC7660SCPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC7660SCPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC7660SCPA?
TC7660SCPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC7660SCPA 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 TC7660SCPA?
For technical support, including TC7660SCPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC7660SCPA requirements.
6.How does Aetrix verify that TC7660SCPA is sourced from the original manufacturer or authorized distributors?
All TC7660SCPA 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 TC7660SCPA meets industry standards.
7.What is the process for return or replacement of TC7660SCPA?
All TC7660SCPA units undergo pre-shipment inspection (PSI). If there is an issue with TC7660SCPA, 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 TC7660SCPA part is unused and in its original packaging.
Return procedure for TC7660SCPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TC7660SCPA Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
