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Renesas ICL7660SIBAZ
- Part No.:
- ICL7660SIBAZ
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660SIBAZ.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,983
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Product details
Overview
ICL7660SIBAZ from Intersil (now Renesas) 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 features a 10 kHz nominal oscillator frequency at 5V, BOOST pin for frequency scaling up to ~35 kHz, and guaranteed 96% power efficiency at 5 kΩ load. Used in RS-232 power supplies and data acquisition systems requiring compact dual-rail generation.
For engineers reviewing the ICL7660SIBAZ datasheet, ICL7660SIBAZ pinout, ICL7660SIBAZ application, or ICL7660SIBAZ equivalent, this page delivers verified electrical specs, industrial-grade (-40°C to +85°C) thermal behavior, BOOST-driven low-impedance operation, and validated alternatives for ±5V generation, voltage doubling, and supply splitting without external diodes.
Technical Context
The ICL7660SIBAZ 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 prevents SCR latchup by dynamically adjusting switch substrates based on VOUT feedback - critical for reliable start-up and short-circuit resilience.
Operation supports multiple topologies: standard inverting converter (VOUT ≈ –VIN), voltage doubler (VOUT ≈ +2VIN), cascaded multiplication, and supply splitting. The LV pin enables regulator bypass below 3.5V for improved low-voltage efficiency, while BOOST pin (Pin 1) raises oscillator frequency to reduce output impedance when using smaller capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 12V - supports wide-range single-supply systems including 3.3V, 5V, and 12V rails without external regulation. |
| Output Voltage Range | -1.5V to -12V - provides matched negative rail for op-amps, ADCs, and RS-232 transceivers directly from positive input. |
| Oscillator Frequency | 10 kHz (typ. at 5V, BOOST open); up to ~35 kHz (BOOST = V+) - higher frequency lowers output impedance and enables use of 0.1 µF capacitors. |
| Supply Current | ≤180 µA over -40°C to +85°C - ultra-low quiescent current enables battery-powered instrumentation. |
| Power Efficiency | ≥96% at 5 kΩ load - minimizes heat rise and extends battery life in portable data acquisition systems. |
| Output Source Resistance | 60 Ω (typ. at 20 mA, 25°C) - defines maximum deliverable current before significant voltage droop; scales with temperature and load. |
| Voltage Conversion Efficiency | ≥99% open-circuit - near-ideal charge transfer enables high-precision reference and sensor biasing. |
Pinout & Package
ICL7660SIBAZ is housed in an 8-lead SOIC package (Pb-free, RoHS-compliant, M8.15 drawing), rated for industrial temperature range (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator boost control | Connect to V+ to increase oscillator frequency ~3.5×; reduces output impedance and enables smaller external capacitors. |
| 2 (CAP+) | Charge pump capacitor terminal | Node where external pump capacitor C1 connects; alternately charged/discharged to transfer energy to CAP- and VOUT. |
| 3 (GND) | Ground reference | System ground return for internal regulator, oscillator, and switch logic; must be low-impedance for stable operation. |
| 4 (CAP-) | Charge reservoir capacitor terminal | Node where external reservoir capacitor C2 connects; stores inverted output charge and filters ripple. |
| 5 (VOUT) | Negative output terminal | Delivers regulated negative voltage; must not exceed GND potential to avoid latchup - requires protection diode if driven positive. |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to lower frequency or external clock (via 1 kΩ series resistor) for precise synchronization. |
| 7 (LV) | Low-voltage mode enable | Tie to GND for <3.5V operation to bypass internal regulator; leave floating for ≥3.5V to prevent latchup. |
| 8 (V+) | Positive input supply | Main power input; accepts 1.5V–12V; internal regulator derives bias for logic and switches. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed 96% power efficiency | Validated across full industrial temperature range, enabling thermally constrained designs like handheld test equipment. |
| BOOST pin for frequency scaling | Enables 3.5× oscillator speed increase without external clock, reducing output impedance by >50% and supporting 0.1 µF capacitors. |
| No external diode required | Integrated latchup protection eliminates need for Schottky diode in most applications - simplifies BOM and layout. |
| LV pin for low-voltage optimization | Bypasses internal regulator below 3.5V, improving efficiency and enabling reliable operation from 1.5V coin-cell sources. |
| 100% tested at 3V | Ensures functional margin and startup reliability at minimum operating voltage - critical for brown-out tolerant systems. |
Applications
| RS-232 Power Supply | Data Acquisition System Bias |
|---|---|
Use Scenario: Generating ±12V from a single 5V microcontroller supply for legacy RS-232 line drivers. IC Role / Device Role / Timing Role: Charge-pump inverter providing isolated negative rail; no timing interface required - self-oscillating. Use Value: Eliminates need for transformer-based or inductor-based DC/DC converters, reducing size, EMI, and cost in serial interface modules. |
Use Scenario: Providing clean ±5V rails for precision 16-bit ADC front-ends in environmental monitoring sensors. IC Role / Device Role / Timing Role: Dual-rail generator supplying analog section; BOOST pin used to minimize output impedance under dynamic load steps. Use Value: Achieves <100 mV output droop at 10 mA load, preserving ADC reference stability and SNR performance. |
| Voltage Doubler for Op-Amp Supplies | Supply Splitter for Single-Rail Systems |
Use Scenario: Converting +5V logic supply into +10V rail for rail-to-rail op-amp output swing extension. IC Role / Device Role / Timing Role: Configured as voltage doubler; uses internal switches and external diodes to stack charge. Use Value: Delivers up to 9.6V output at 10 mA with 60 Ω source impedance - sufficient for driving capacitive loads in active filters. |
Use Scenario: Splitting +15V industrial supply into ±7.5V rails for bipolar signal conditioning in PLC analog I/O modules. IC Role / Device Role / Timing Role: Bidirectional charge-pump operating in split-mode; LV pin tied via high-value resistor for controlled start-up. Use Value: Enables symmetrical loading with ≤250 Ω combined output resistance - maintains common-mode rejection in differential amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1044CSA+ | Fixed 10 kHz oscillator; no BOOST pin; higher typical supply current (250 µA) at 25°C; same 8-pin SOIC package. | Lacks frequency scaling capability - less suitable for space-constrained designs needing small capacitors. | Select MAX1044CSA+ only when fixed-frequency operation and legacy compatibility outweigh need for low-impedance output. |
| TC7660COA | Lower max input voltage (10V vs. 12V); 95% min power efficiency; identical pinout and BOOST functionality. | Slightly reduced headroom for 12V systems; otherwise drop-in compatible for most ±5V and RS-232 applications. | Choose TC7660COA for cost-sensitive industrial designs where 12V operation is not required and RoHS compliance is confirmed. |
Compared with ICL7660SIBAZ, MAX1044CSA+ offers simpler timing but higher quiescent current and no BOOST flexibility, while TC7660COA matches key features but limits input voltage to 10V - making ICL7660SIBAZ optimal for 12V-tolerant, low-impedance, and battery-efficient designs.
Availability
ICL7660SIBAZ is available at Aetrix Electronics and suitable for RS-232 power supplies, data acquisition system biasing, and voltage-doubling applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for ICL7660SIBAZ 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 (formerly Intersil) is a global semiconductor leader specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The ICL7660S product line was designed specifically for low-power, capacitor-based voltage conversion in space- and cost-constrained systems - emphasizing latchup immunity, wide input range, and minimal external component count.
FAQ
What is the operating temperature range for the ICL7660SIBAZ?
The ICL7660SIBAZ is rated for industrial temperature operation from -40°C to +85°C. This range is fully characterized and guaranteed for all key parameters including supply current, output source resistance, and power efficiency - making it suitable for deployment in harsh environments such as factory automation controllers and outdoor instrumentation.
Can the ICL7660SIBAZ operate without an external Schottky diode?
Yes, the ICL7660SIBAZ can operate without an external Schottky diode across its full specified voltage and temperature range. Its integrated latchup protection circuitry - including dynamic substrate bias control and LV pin logic - eliminates the need for external diodes in standard inverting configurations, simplifying design and reducing BOM cost.
How does the BOOST pin affect output performance of the ICL7660SIBAZ?
Connecting the BOOST pin (Pin 1) of the ICL7660SIBAZ to V+ increases the internal oscillator frequency from ~10 kHz to ~35 kHz. This higher switching frequency reduces output impedance by more than 50%, enabling use of smaller 0.1 µF external capacitors while maintaining low ripple and fast transient response - especially valuable in surface-mount, space-constrained applications.
What is the purpose of the LV pin on the ICL7660SIBAZ?
The LV pin on the ICL7660SIBAZ controls internal regulator bypass: tie it to GND for input voltages below 3.5V to disable the regulator and improve low-voltage efficiency; leave it floating for inputs ≥3.5V to maintain latchup protection. Incorrect LV connection - e.g., grounding it at 5V - risks device damage due to uncontrolled substrate bias.
Is the ICL7660SIBAZ pin-compatible with the original ICL7660?
Yes, the ICL7660SIBAZ is a direct replacement for the industry-standard ICL7660, sharing identical 8-pin SOIC footprint, pinout, and basic functionality. However, it adds BOOST pin capability, wider 1.5V–12V input range, lower supply current, and enhanced latchup protection - all while maintaining backward compatibility in existing PCB layouts.
ICL7660SIBAZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 45mA
- Frequency - Switching:
- 10kHz ~ 35kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660SIBAZ FAQ
1.How can I place an order for ICL7660SIBAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660SIBAZ 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 ICL7660SIBAZ reliable?
The price and inventory of ICL7660SIBAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660SIBAZ is usually 5 days.
3.What payment methods are accepted for ICL7660SIBAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660SIBAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660SIBAZ?
ICL7660SIBAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660SIBAZ 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 ICL7660SIBAZ?
For technical support, including ICL7660SIBAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660SIBAZ requirements.
6.How does Aetrix verify that ICL7660SIBAZ is sourced from the original manufacturer or authorized distributors?
All ICL7660SIBAZ 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 ICL7660SIBAZ meets industry standards.
7.What is the process for return or replacement of ICL7660SIBAZ?
All ICL7660SIBAZ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660SIBAZ, 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 ICL7660SIBAZ part is unused and in its original packaging.
Return procedure for ICL7660SIBAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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