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Renesas ICL7660SCPA
- Part No.:
- ICL7660SCPA
- Manufacturer:
- Renesas
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7660SCPA.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,954
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Product details
Overview
ICL7660SCPA from Renesas is a monolithic CMOS charge-pump voltage converter IC that performs positive-to-negative voltage conversion (e.g., +5V → −5V) with 1.5V–12V input range, 96% minimum power efficiency, 10kHz nominal oscillator frequency, and 60Ω typical output source resistance at 20mA load. It operates in commercial temperature range (0°C to +70°C) and uses only two external non-critical capacitors for basic operation.
For engineers reviewing the ICL7660SCPA datasheet, ICL7660SCPA pinout, ICL7660SCPA application, or ICL7660SCPA equivalent, this device is selected for low-cost bipolar supply generation in instrumentation, RS-232 interfaces, and data acquisition systems where minimal external components and latchup immunity are critical.
Technical Context
The ICL7660SCPA integrates an internal series regulator, RC oscillator, voltage level translator, and four MOS power switches (one P-channel, three N-channel) to implement a switched-capacitor negative voltage converter. Its substrate bias logic network actively senses VOUT to dynamically adjust switch substrates and prevent SCR latchup across temperature and load conditions.
Operation supports multiple topologies: standalone inverting converter (VOUT ≈ −VIN), voltage doubler (VOUT ≈ +2VIN), cascaded multiplication, and supply splitting. The BOOST pin (Pin 1) enables oscillator frequency scaling up to ~35kHz, reducing output impedance without increasing capacitor size - a key advantage for space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 12V - supports single-cell Li-ion, 3.3V/5V logic rails, and legacy 12V systems without external regulation. |
| Output Voltage Polarity | Negative (−VIN) - generates complementary rail for op-amp biasing, ADC reference, or RS-232 drivers. |
| Oscillator Frequency | 10kHz (typical, no external cap); up to 35kHz with BOOST pin tied to V+ - enables smaller pump capacitors (e.g., 0.1µF) while maintaining low output impedance. |
| Power Efficiency | ≥96% (min, RL = 5kΩ) - minimizes heat rise and extends battery life in portable instrumentation. |
| Output Source Resistance | 60Ω (typ, IOUT = 20mA, TA = +25°C) - defines voltage droop under load; improves with higher fOSC or larger C1/C2. |
| Supply Current | 80µA (typ, TA = +25°C) - ultra-low quiescent draw suitable for always-on sensor nodes and low-power microcontrollers. |
| Temperature Range | 0°C to +70°C - validated for commercial-grade embedded systems, not industrial or automotive. |
Pinout & Package
ICL7660SCPA is housed in an 8-lead PDIP (Plastic Dual In-line Package) per package drawing E8.3, with through-hole mounting and RoHS-compliant lead finish (Pb-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator boost control | Tying to V+ increases oscillator current and raises fOSC ~3.5×, lowering output impedance without changing external caps. |
| 2 (CAP+) | Charge pump capacitor connection | Anode of pump capacitor C1; switched between V+ and CAP− during charge-transfer cycles. |
| 3 (GND) | Ground reference | System ground return for all internal circuitry and external capacitors; must be low-impedance. |
| 4 (CAP−) | Charge reservoir capacitor connection | Cathode of reservoir capacitor C2; forms negative output node when referenced to GND. |
| 5 (VOUT) | Negative output terminal | Delivers regulated −VIN; requires external Schottky diode to CAP− if V+ > 5.5V to prevent latchup. |
| 6 (OSC) | Oscillator timing node | Connect external capacitor to lower fOSC; or drive with external clock (via 1kΩ series resistor) for precise frequency control. |
| 7 (LV) | Low-voltage mode enable | Must tie to GND for V+ < 3.5V to bypass internal regulator; leave floating for V+ ≥ 3.5V to avoid latchup. |
| 8 (V+) | Positive input supply | Main power input; absolute max rating +13V; supplies internal regulator, oscillator, and switch drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) for frequency scaling | Enables 35kHz operation to reduce output impedance by ~3×, permitting use of 0.1µF instead of 10µF pump capacitors - saves board area and cost. |
| LV pin for low-voltage optimization | Direct GND tie disables internal regulator below 3.5V, improving efficiency and enabling reliable start-up from 1.5V alkaline or NiMH cells. |
| Integrated latchup protection | Active substrate bias control prevents SCR conduction across full temp/voltage range - eliminates need for external diodes in most 5V applications. |
| Multi-topology support | Configurable as inverter, doubler, multiplier, or splitter using same pinout - reduces BOM count and simplifies design reuse. |
| Pb-free PDIP packaging | RoHS-compliant 8-lead through-hole package (E8.3) compatible with wave soldering - supports legacy assembly lines without reflow compatibility concerns. |
Applications
| RS-232 Power Supply | Negative Rail for Data Acquisition |
|---|---|
Use Scenario: Generating ±12V from a single +5V USB-powered host for legacy RS-232 transceivers. IC Role / Device Role / Timing Role: Charge-pump inverter providing isolated negative rail; no timing interface required - self-oscillating. Use Value: Eliminates need for isolated DC-DC converters or dual-output wall adapters, cutting system cost and footprint by >40%. |
Use Scenario: Biasing precision op-amps and analog front-ends in handheld multimeters and sensor loggers. IC Role / Device Role / Timing Role: Low-noise negative supply generator; BOOST pin used to raise fOSC and suppress switching ripple near sensitive analog inputs. Use Value: Achieves <10mVpp output ripple with 10µF low-ESR tantalum caps, meeting 16-bit ADC reference stability requirements. |
| Supply Splitter for Single-Rail Systems | Low-Power Instrumentation Bias |
Use Scenario: Converting +9V battery supply into ±4.5V rails for rail-to-rail op-amp circuits in portable oscilloscope probes. IC Role / Device Role / Timing Role: Bidirectional voltage splitter; LV pin tied to GND to maximize efficiency at low input voltage. Use Value: Delivers symmetrical output with <5% imbalance at 5mA load, enabling true bipolar signal swing without center-tapped transformers. |
Use Scenario: Providing −5V bias for photodiode transimpedance amplifiers in battery-operated gas sensors. IC Role / Device Role / Timing Role: Ultra-low-quiescent inverter; operates continuously from 1.5V alkaline cell with 80µA supply current. Use Value: Extends battery life to >2 years in sleep-wake cycle applications while maintaining stable offset voltage over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660SCPAZ | Pb-free version of same PDIP package; identical electrical specs; RoHS-compliant matte tin plating. | Required for new designs targeting RoHS compliance; same PCB layout and thermal profile. | Select ICL7660SCPAZ for production builds requiring Pb-free certification; ICL7660SCPA remains valid for legacy repair or non-RoHS environments. |
| MAX1044CPA | Higher max supply current (250µA typ), no BOOST pin, fixed 10kHz oscillator; requires external diode for latchup prevention above 5V. | Limited to simpler inverter use cases; lacks frequency-scaling capability for compact capacitor selection. | Choose MAX1044CPA only if existing designs mandate pin-for-pin replacement with older ICL7660 variants and no BOOST functionality is needed. |
Compared with ICL7660SCPA, ICL7660SCPAZ offers identical performance with RoHS compliance, while MAX1044CPA trades BOOST flexibility and latchup immunity for broader second-source availability - making ICL7660SCPA optimal for new cost-sensitive, space-constrained inverter designs requiring robust low-voltage operation.
Availability
ICL7660SCPA is available at Aetrix Electronics and suitable for RS-232 power supplies, portable data acquisition systems, and low-power instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for ICL7660SCPA 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
Renesas Electronics is a global semiconductor leader delivering high-performance analog, mixed-signal, and power management solutions for industrial, automotive, and communications markets.
The ICL7660S family was designed specifically for low-cost, low-power bipolar supply generation in space-constrained embedded systems - emphasizing simplicity, latchup immunity, and wide input voltage tolerance without external diodes.
FAQ
What is the maximum input voltage rating for the ICL7660SCPA?
The ICL7660SCPA has an absolute maximum supply voltage rating of +13.0V. However, its specified operating range is 1.5V to 12V. Exceeding +13.0V risks permanent damage. For reliable operation at 12V, ensure the LV pin is left floating and verify that transient spikes remain within limits per the Absolute Maximum Ratings table on page 3 of FN3179 Rev 7.01. The ICL7660SCPA must never be operated at or near +13.0V continuously.
Can the ICL7660SCPA generate a positive doubled output voltage?
Yes, the ICL7660SCPA can function as a voltage doubler to generate up to +22.8V from a 12V input using the configuration shown in Figure 18 of the datasheet. This requires external diodes D1 and D2, plus pump (C1) and reservoir (C2) capacitors. Output source resistance will be ~60Ω at 10mA load with V+ = 5V. The ICL7660SCPA does not integrate diodes - they must be added externally for doubling operation.
Is an external Schottky diode required when using the ICL7660SCPA?
An external Schottky diode from VOUT (Pin 5) to CAP− (Pin 4) is required only when V+ exceeds 5.5V and the input voltage rise rate exceeds 2V/µs - a condition that can forward-bias Q4's body diode and trigger latchup. For standard 5V operation with clean supply ramp-up, no external diode is needed. The ICL7660SCPA's integrated latchup protection eliminates diodes in most commercial applications, unlike legacy ICL7660 variants.
How does the BOOST pin affect the performance of the ICL7660SCPA?
Tying the BOOST pin (Pin 1) to V+ increases the oscillator's charge/discharge current, raising the nominal frequency from 10kHz to ~35kHz. This reduces output source resistance and ripple, enabling smaller pump capacitors (e.g., 0.1µF instead of 10µF) without sacrificing load regulation. The ICL7660SCPA's BOOST feature directly lowers design cost and board area in surface-mount applications where capacitor size is constrained.
What is the purpose of the LV pin on the ICL7660SCPA?
The LV pin (Pin 7) controls the internal series regulator. When tied to GND, it bypasses the regulator to improve efficiency and enable reliable operation down to 1.5V input - essential for single-cell battery systems. For inputs ≥3.5V, the LV pin must be left floating to prevent latchup. Misconnecting LV at high voltage is a common cause of ICL7660SCPA failure and must be verified in layout and test.
ICL7660SCPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 45mA
- 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
ICL7660SCPA FAQ
1.How can I place an order for ICL7660SCPA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660SCPA 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 ICL7660SCPA reliable?
The price and inventory of ICL7660SCPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660SCPA is usually 5 days.
3.What payment methods are accepted for ICL7660SCPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660SCPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660SCPA?
ICL7660SCPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660SCPA 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 ICL7660SCPA?
For technical support, including ICL7660SCPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660SCPA requirements.
6.How does Aetrix verify that ICL7660SCPA is sourced from the original manufacturer or authorized distributors?
All ICL7660SCPA 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 ICL7660SCPA meets industry standards.
7.What is the process for return or replacement of ICL7660SCPA?
All ICL7660SCPA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660SCPA, 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 ICL7660SCPA part is unused and in its original packaging.
Return procedure for ICL7660SCPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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