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Renesas ICL7660SIPA
- Part No.:
- ICL7660SIPA
- Manufacturer:
- Renesas
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7660SIPA.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,539
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Product details
Overview
ICL7660SIPA from Renesas Electronics is a monolithic CMOS charge-pump voltage converter IC that performs positive-to-negative supply conversion across 1.5V–12V input, delivering complementary -1.5V to -12V output with only two external capacitors. It integrates an RC oscillator (10 kHz nominal at 5V), voltage level translator, series regulator, and four power MOS switches - enabling ±5V generation from +5V logic rails in data acquisition and RS-232 systems.
For engineers reviewing the ICL7660SIPA datasheet, ICL7660SIPA pinout, ICL7660SIPA application, or ICL7660SIPA equivalent, this device supports low-quiescent-current negative rail generation, frequency boosting via Pin 1, LV-bypass for sub-3.5V operation, and cascaded/multiplied topologies - all within industrial temperature range (-40°C to +85°C) and 8-lead PDIP packaging.
Technical Context
The ICL7660SIPA implements a switched-capacitor charge-pump architecture using four internal MOS switches (one P-channel, three N-channel) controlled by a divide-by-2 counter and oscillator. Its substrate bias logic network actively monitors VOUT to dynamically adjust switch substrates and prevent SCR latchup - critical during startup and short-circuit conditions.
It features dual operating modes: standard regulation (LV pin floating for V+ > 3.5V) and low-voltage bypass (LV tied to GND for 1.5V–3.5V inputs). The BOOST pin (Pin 1) increases oscillator current to raise fOSC up to ~35 kHz, reducing output impedance without larger capacitors - a key enabler for space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V–12V: supports battery-powered sensors (1.5V) and industrial 12V rails without external regulation. |
| Output Voltage Range | -1.5V to -12V: complementary negative rail matches input magnitude, enabling true bipolar supplies. |
| Oscillator Frequency | 5–35 kHz (adjustable): default 10 kHz at 5V; boosted to ~35 kHz with Pin 1 = V+, lowering output impedance. |
| Supply Current | ≤180 µA over -40°C to +85°C: enables ultra-low-power portable instrumentation and always-on monitoring. |
| Output Source Resistance | 60–120 Ω at 20 mA: defines load regulation capability; reduced further with BOOST pin or higher fOSC. |
| Power Efficiency | ≥95% at full temperature range: minimizes thermal rise in sealed enclosures and extends battery life. |
| Voltage Conversion Efficiency | 99% open-circuit: near-ideal charge transfer enables precision analog front-ends with minimal voltage droop. |
Pinout & Package
ICL7660SIPA is housed in an 8-lead plastic dual in-line package (PDIP), RoHS-compliant, with 0.3-inch body width and through-hole mounting. Thermal resistance θJA = 110°C/W enables operation up to +85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator boost control | Connect to V+ to increase oscillator current and raise switching frequency ~3.5×, reducing output impedance. |
| 2 (CAP+) | Charge pump capacitor connection | Anode of pump capacitor C1; carries full switching current; polarity-sensitive with polarized electrolytics. |
| 3 (GND) | Ground reference | System ground return; LV pin must not exceed GND potential to avoid latchup. |
| 4 (CAP-) | Charge reservoir capacitor connection | Cathode of reservoir capacitor C2; connects to VOUT via internal switches; Schottky diode recommended if V+ > 5V. |
| 5 (VOUT) | Negative output terminal | Delivers regulated -V+; must remain ≤ GND to prevent forward-biasing internal body diodes and latchup. |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to lower fOSC or external clock (via 1 kΩ series resistor) for noise-sensitive applications. |
| 7 (LV) | Low-voltage mode enable | Tie to GND for 1.5V–3.5V operation (bypasses internal regulator); leave floating for 3.5V–12V to prevent latchup. |
| 8 (V+) | Positive input supply | Main power input; absolute max 13V; requires local 2.2 µF decoupling if source impedance >25 Ω or dV/dt >2 V/µs. |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) | Enables 3.5× oscillator frequency increase without external clock, cutting output impedance and allowing smaller 0.1 µF capacitors. |
| LV pin control | Configurable low-voltage bypass (LV = GND) or standard regulation (LV = open) ensures robust operation across 1.5V–12V input range. |
| SCR latchup protection | Active substrate bias network senses VOUT and adjusts switch substrates in real time, eliminating need for external diodes in most cases. |
| 99% open-circuit conversion efficiency | Minimizes voltage loss in high-impedance sensor biasing and reference generation where load current is microamp-level. |
| Industrial temperature range | Rated -40°C to +85°C with guaranteed specs, supporting deployment in automotive under-hood, factory automation, and outdoor instrumentation. |
Applications
| Data Acquisition Systems | RS-232 Interface Power |
|---|---|
|
Use Scenario: Providing isolated negative supply for 16-bit ADC front-ends requiring clean ±5V rails in portable test equipment. IC Role / Device Role / Timing Role: Charge-pump voltage converter generating stable -5V from +5V logic supply; operates at 10 kHz to avoid aliasing into ADC sampling band. Use Value: Eliminates need for isolated DC/DC modules, reducing BOM cost and board area while maintaining <0.01% line regulation error over temperature. |
Use Scenario: Generating -12V and +12V rails from a single +5V USB port for legacy RS-232 transceivers in embedded gateways. IC Role / Device Role / Timing Role: Dual-rail charge-pump converter; one ICL7660SIPA generates -5V, cascaded with second unit to reach -10V, then doubled via external diodes. Use Value: Achieves RS-232 compliant voltage levels with <50 mV ripple using 10 µF electrolytics, avoiding transformer-based solutions with EMI concerns. |
| Instrumentation Amplifier Biasing | Split-Rail Sensor Excitation |
|
Use Scenario: Supplying symmetric ±2.5V bias to rail-to-rail op-amps driving high-precision strain gauge bridges in medical diagnostics. IC Role / Device Role / Timing Role: Negative voltage generator referenced to system GND; LV pin grounded for stable 2.5V input operation. Use Value: Delivers <100 µV peak-to-peak ripple at 1 mA load, preserving 120 dB CMRR in differential amplification stages. |
Use Scenario: Creating balanced +3.3V/–3.3V excitation for MEMS accelerometers in IoT edge nodes powered by single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Voltage splitter topology (Figure 20) using shared CAP+ and dual CAP– paths to generate symmetrical rails. Use Value: Enables true differential sensor measurement with <±0.5% matching between positive and negative rails across battery discharge cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660SIPAZ | Pb-free (RoHS-compliant) revision of ICL7660SIPA; identical electrical specs and pinout; same PDIP-8 package with matte tin finish. | Required for new designs targeting RoHS compliance; compatible drop-in replacement for ICL7660SIPA in wave-soldered assemblies. | Select ICL7660SIPAZ for production builds requiring lead-free certification; no layout or firmware changes needed. |
| MAX660CPA+ | Higher quiescent current (160 µA typ vs. 80 µA typ); fixed 10 kHz oscillator (no BOOST pin); wider -40°C to +85°C rating but lower efficiency (90% min). | Suitable for cost-sensitive consumer applications where PCB space is less constrained and efficiency below 95% is acceptable. | Choose MAX660CPA+ only when ICL7660SIPA is unavailable and design can tolerate 5–10% lower efficiency and no frequency tuning. |
Compared with ICL7660SIPA, ICL7660SIPAZ offers identical functionality with RoHS compliance, while MAX660CPA+ trades BOOST flexibility and efficiency for broader distributor availability - making ICL7660SIPA optimal for industrial designs demanding low-noise, tunable, and high-efficiency negative rail generation.
Availability
ICL7660SIPA is available at Aetrix Electronics and suitable for data acquisition systems, RS-232 interface power, instrumentation amplifier biasing, and split-rail sensor excitation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ICL7660SIPA 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 specializing in microcontrollers, analog, power, and connectivity solutions for industrial, automotive, and infrastructure markets.
The ICL7660SIPA belongs to Renesas' legacy Super Voltage Converter family, designed specifically for low-power, high-efficiency charge-pump voltage inversion in space- and cost-constrained analog systems.
FAQ
What is the maximum input voltage rating for the ICL7660SIPA?
The ICL7660SIPA has an absolute maximum supply voltage of +13.0V, but its specified operating range is +1.5V to +12V. Operation above 12V risks exceeding guaranteed performance limits and may accelerate parametric drift over temperature and time. Always maintain margin below 13V in production designs to ensure reliability.
Can the ICL7660SIPA generate positive voltage doubling?
Yes, the ICL7660SIPA can be configured as a positive voltage doubler using external diodes (e.g., Figure 18), producing up to 22.8V from a 12V input. However, this requires additional passive components and reduces overall efficiency compared to native negative conversion; the device itself does not integrate diodes for this mode.
Is an external Schottky diode required for ICL7660SIPA operation?
An external Schottky diode from VOUT to CAP- is recommended when V+ exceeds 5.5V and the input dV/dt exceeds 2 V/µs, to prevent latchup caused by forward-biasing Q4's body diode. For V+ ≤ 5.5V or well-regulated supplies, the ICL7660SIPA operates reliably without external diodes across its full temperature range.
How does the BOOST pin affect ICL7660SIPA performance?
Connecting the BOOST pin (Pin 1) to V+ increases oscillator drive current, raising switching frequency from ~10 kHz to ~35 kHz. This lowers output impedance and ripple, enabling use of smaller (e.g., 0.1 µF) pump capacitors - critical for miniaturized designs where capacitor footprint dominates board area.
What is the purpose of the LV pin on the ICL7660SIPA?
When tied to GND, the LV pin disables the internal series regulator to improve efficiency and stability at low input voltages (1.5V–3.5V). For inputs above 3.5V, the LV pin must remain floating to prevent latchup - incorrect LV configuration is a leading cause of field failures in ICL7660SIPA designs.
ICL7660SIPA 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ICL7660SIPA FAQ
1.How can I place an order for ICL7660SIPA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660SIPA 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 ICL7660SIPA reliable?
The price and inventory of ICL7660SIPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660SIPA is usually 5 days.
3.What payment methods are accepted for ICL7660SIPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660SIPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660SIPA?
ICL7660SIPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660SIPA 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 ICL7660SIPA?
For technical support, including ICL7660SIPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660SIPA requirements.
6.How does Aetrix verify that ICL7660SIPA is sourced from the original manufacturer or authorized distributors?
All ICL7660SIPA 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 ICL7660SIPA meets industry standards.
7.What is the process for return or replacement of ICL7660SIPA?
All ICL7660SIPA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660SIPA, 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 ICL7660SIPA part is unused and in its original packaging.
Return procedure for ICL7660SIPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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