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Renesas ICL7660CBA
- Part No.:
- ICL7660CBA
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660CBA.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,568
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Product details
Overview
ICL7660CBA 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 output voltages from –1.5V to –12V. It integrates an RC oscillator, voltage level translator, series regulator, and four power MOS switches, requiring only two external non-critical capacitors. It is widely used in RS-232 power supplies and data acquisition systems needing dual-rail ±5V from a single +5V rail.
For engineers reviewing the ICL7660CBA datasheet, ICL7660CBA pinout, ICL7660CBA application, or ICL7660CBA equivalent, key selection criteria include its 10 kHz nominal oscillator frequency at 5V, 96% minimum power efficiency, 60 Ω typical output source resistance at 20 mA, LV pin for low-voltage operation bypass, and BOOST pin for frequency scaling-critical for optimizing capacitor size and output impedance in space-constrained designs.
Technical Context
The ICL7660CBA implements a switched-capacitor charge-pump topology with internal P- and N-channel MOSFET switches arranged in a four-phase configuration. Its oscillator operates at 10 kHz (typ.) with no external capacitor, scalable to ~35 kHz via BOOST pin tied to V+, or externally overdriven up to 100 kHz using a 1 kΩ series resistor.
It features dual-mode operation: with LV pin grounded, it disables the internal series regulator for improved efficiency below 3.5V input; with LV floating, it enables latchup protection above 3.5V. Output regulation relies on passive capacitor-based impedance rather than feedback control, yielding open-circuit voltage conversion efficiency up to 99.9% but load-dependent output impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 12V - supports battery-powered (1.5V alkaline) and industrial (12V) rails without external regulation |
| Oscillator Frequency | 10 kHz (typ.) at 5V, adjustable via BOOST pin or external clock - determines pump capacitor sizing and output ripple |
| Output Source Resistance | 60 Ω (typ.) at 20 mA, 5V - defines voltage droop under load; lower values require higher fOSC or larger C1/C2 |
| Power Efficiency | ≥96% at RL = 5 kΩ - minimizes wasted power in low-quiescent-current portable applications |
| Voltage Conversion Efficiency | ≥99% open-circuit - ensures near-ideal VOUT ≈ –VIN when unloaded, critical for precision reference splitting |
| Operating Temperature | 0°C to +70°C - commercial-grade thermal range suitable for office equipment and consumer instrumentation |
| Package | 8-lead SOIC (M8.15) - surface-mount compatible with standard reflow profiles and automated assembly |
Pinout & Package
ICL7660CBA is housed in an 8-lead SOIC package (JEDEC MS-012, package drawing M8.15), RoHS-compliant and rated for moisture sensitivity level MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency boost control | Tie to V+ to increase switching frequency ~3.5×, reducing output impedance and enabling smaller external capacitors |
| 2 (CAP+) | Charge pump capacitor connection | Anode of primary flying capacitor (C1); carries full switching current; polarity-sensitive with polarized electrolytics |
| 3 (GND) | Ground reference | System ground return; substrate bias reference for internal MOSFETs; must be low-impedance |
| 4 (CAP–) | Charge reservoir capacitor connection | Cathode of output reservoir capacitor (C2); forms negative output node; requires low-ESR capacitor for minimal ripple |
| 5 (VOUT) | Negative output terminal | Delivers regulated –VIN; must not exceed GND potential to avoid latchup; may require Schottky clamp diode if V+ rise rate >2 V/µs |
| 6 (OSC) | Oscillator timing node | Connect external capacitor to lower frequency (e.g., 100 pF → 1 kHz); or drive with external CMOS clock (1 kΩ series) |
| 7 (LV) | Low-voltage mode enable | Ground to bypass internal regulator for 1.5–3.5V operation; leave floating for 3.5–12V to prevent latchup |
| 8 (V+) | Positive input supply | Primary power input; also serves as logic high reference; max rating 13V absolute |
Key Features
| Feature | Design Value |
|---|---|
| BOOST pin for frequency scaling | Enables 3.5× oscillator speed-up to reduce output impedance by ~70%, allowing 0.1 µF capacitors instead of 10 µF in compact layouts |
| LV pin selectable regulator bypass | Permits efficient sub-3.5V operation (e.g., 1.5V AA battery) by disabling series regulator, avoiding ~0.3V dropout loss |
| Integrated SCR latchup protection | Logic-controlled substrate bias network prevents destructive latchup during start-up or short-circuit, eliminating need for external diodes in most cases |
| 99.9% open-circuit voltage conversion efficiency | Ensures VOUT closely tracks –VIN under no-load conditions, supporting precision analog supply splitting and reference generation |
| Pb-free SOIC packaging | RoHS-compliant M8.15 package with matte tin (e3) termination, qualified for SnPb and Pb-free reflow per J-STD-020 |
Applications
| RS-232 Transceiver Power Supply | Negative Rail Generation for Op-Amp Circuits |
|---|---|
Use Scenario: Generating –5V to –12V bias for RS-232 line drivers/receivers (e.g., MAX232 replacement) from a single +5V microcontroller supply. IC Role / Device Role / Timing Role: Charge-pump voltage inverter providing isolated negative rail; no timing interface required-self-oscillating at 10 kHz. Use Value: Eliminates need for external inductors or transformers; achieves <120 Ω output impedance at 20 mA, sufficient for standard RS-232 load compliance. | Use Scenario: Creating symmetric ±5V supplies for rail-to-rail op-amps in portable data loggers or sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Dual-rail supply splitter; converts +5V into –5V while sharing same ground reference; operates continuously with fixed-frequency switching. Use Value: Delivers 99% open-circuit conversion efficiency, minimizing quiescent current draw (<160 µA typ.), extending battery life in low-power systems. |
| Portable Instrumentation Power | Split-Supply Audio Amplifier Bias |
Use Scenario: Providing negative bias for ADC front-end amplifiers and reference buffers in handheld multimeters or oscilloscope probes. IC Role / Device Role / Timing Role: Precision negative voltage source; LV pin grounded for stable 3V operation from lithium coin cell; BOOST disabled for lowest noise. Use Value: Maintains <300 Ω output resistance at –3V/3 mA across –40°C to +85°C, ensuring stable offset performance in metrology-grade analog stages. | Use Scenario: Biasing Class-AB audio op-amps (e.g., NE5532) in battery-powered headphone amplifiers requiring clean ±4.5V rails. IC Role / Device Role / Timing Role: Low-noise inverting supply generator; OSC pin filtered with 100 pF to reduce EMI at 1 kHz; C1/C2 selected for <10 mVpp ripple. Use Value: Achieves 97% power efficiency at 10 mA, limiting thermal rise in sealed enclosures; SOIC package allows compact double-sided PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660ACBAZA | Pb-free SOIC variant of same ICL7660A family; identical electrical specs and pinout; RoHS-compliant with e3 matte tin finish | No functional difference; direct drop-in replacement where lead-free compliance is mandatory | Select ICL7660ACBAZA for new designs requiring RoHS certification and modern reflow compatibility |
| MAX1044CPA | Higher 35 kHz default oscillator; lower 40 Ω typical ROUT at 20 mA; requires external timing capacitor for frequency control | Better suited for high-current, low-impedance loads (>25 mA); less tolerant of fast V+ slew rates without clamping diode | Choose MAX1044CPA when lower output impedance and faster transient response are prioritized over ultra-low quiescent current |
Compared with ICL7660CBA, ICL7660ACBAZA offers identical functionality with enhanced environmental compliance, while MAX1044CPA trades higher supply current for reduced output impedance and greater flexibility in oscillator tuning-making it preferable for dynamic load applications but less optimal for battery longevity.
Availability
ICL7660CBA is available at Aetrix Electronics and suitable for RS-232 transceiver power supplies, portable instrumentation, and split-supply audio amplifier biasing requiring stable component supply and long-term obsolescence management.
Supply support for ICL7660CBA 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 ICL7660CBA belongs to Renesas' legacy Super Voltage Converter product line, designed specifically for low-power, inductorless DC-DC voltage inversion in space- and cost-constrained embedded systems.
FAQ
What is the maximum input voltage rating for the ICL7660CBA?
The ICL7660CBA has an absolute maximum supply voltage rating of +13.0V. Its specified operating supply voltage range is 1.5V to 12V. Exceeding 13V risks permanent damage due to internal junction breakdown. Operation at 12V is fully characterized across temperature and load conditions, with guaranteed performance including ≥95% power efficiency and ≤120 Ω output resistance at 20 mA.
Can the ICL7660CBA generate positive voltage doubling as well as negative voltage inversion?
Yes, the ICL7660CBA can be configured as a positive voltage doubler using an external diode network (per Figure 18 in FN3179). In this mode, it delivers up to 22.8V output from a 12V input. The ICL7660CBA's internal switch architecture supports both topologies without modification-the device itself remains unchanged; only external component connections differ between inverter and doubler configurations.
How does the LV pin affect ICL7660CBA operation below 3.5V input?
When the LV pin is tied to GND, the ICL7660CBA bypasses its internal series regulator, enabling stable operation down to 1.5V input with improved efficiency and reduced dropout. This is essential for battery-powered applications like handheld meters. Leaving LV floating at low voltages causes improper substrate biasing and may result in latchup or failure to start-so grounding LV is mandatory for inputs ≤3.5V.
Is an external Schottky diode required for reliable ICL7660CBA operation?
An external Schottky diode from VOUT to CAP– is recommended when the input supply voltage exceeds 5V and has a rise rate >2 V/µs (e.g., hot-plug or fast-switching DC-DC outputs). This prevents forward-biasing the body diode of internal Q4, which could trigger latchup. For standard 5V logic rails with slow ramp-up, the ICL7660CBA operates reliably without any external diode-confirmed by 100% testing per datasheet FN3179 Rev 7.01.
What is the role of the BOOST pin on the ICL7660CBA, and how does it impact capacitor selection?
The BOOST pin on the ICL7660CBA increases oscillator frequency ~3.5× when tied to V+, lowering output impedance and enabling use of smaller external capacitors. For example, with BOOST active, 0.1 µF capacitors achieve comparable performance to 10 µF capacitors in free-running mode. This reduces board area and cost in space-constrained designs-especially valuable in modern SOIC-based layouts where capacitor footprint dominates real estate.
ICL7660CBA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 10V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 45mA
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660CBA FAQ
1.How can I place an order for ICL7660CBA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660CBA 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 ICL7660CBA reliable?
The price and inventory of ICL7660CBA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660CBA is usually 5 days.
3.What payment methods are accepted for ICL7660CBA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660CBA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660CBA?
ICL7660CBA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660CBA 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 ICL7660CBA?
For technical support, including ICL7660CBA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660CBA requirements.
6.How does Aetrix verify that ICL7660CBA is sourced from the original manufacturer or authorized distributors?
All ICL7660CBA 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 ICL7660CBA meets industry standards.
7.What is the process for return or replacement of ICL7660CBA?
All ICL7660CBA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660CBA, 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 ICL7660CBA part is unused and in its original packaging.
Return procedure for ICL7660CBA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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