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Renesas ICL7660CBAZ
- Part No.:
- ICL7660CBAZ
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660CBAZ.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:20,202
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Product details
Overview
ICL7660CBAZ from Intersil (now Renesas) is a monolithic CMOS charge-pump voltage converter IC that performs positive-to-negative voltage 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 in an 8-lead SOIC package. It requires only two external non-critical capacitors and supports voltage doubling up to ±22.8V with 12V input.
For engineers reviewing the ICL7660CBAZ datasheet, ICL7660CBAZ pinout, ICL7660CBAZ application, or ICL7660CBAZ equivalent, key selection criteria include its 10 kHz nominal oscillator frequency (boostable to ~35 kHz), guaranteed 96% power efficiency at 5 kΩ load, 60 Ω typical output source resistance at 20 mA, LV pin for low-voltage optimization, and industrial-grade temperature range support when paired with appropriate variants.
Technical Context
The ICL7660CBAZ implements a switched-capacitor negative voltage converter using four internal MOS switches (one P-channel, three N-channel) controlled by a divide-by-2 counter-driven oscillator. Its substrate bias logic network actively senses VOUT to dynamically adjust switch substrates and prevent latchup-critical during startup and short-circuit conditions.
It features dual operating modes: standard regulation (LV pin floating for V+ > 3.5 V) and low-voltage bypass (LV tied to GND for 1.5 V ≤ V+ ≤ 3.5 V). The BOOST pin (Pin 1) increases oscillator current to raise switching frequency, reducing output impedance and enabling smaller external capacitors without sacrificing performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5 V to 12 V - supports single-supply systems from low-power sensors to industrial rails |
| Oscillator Frequency | 10 kHz (typ.) at 5 V; up to ~35 kHz with BOOST pin high - enables lower output impedance and reduced capacitor size |
| Output Source Resistance | 60 Ω (typ.) at 20 mA, 5 V - defines maximum load regulation error and ripple under dynamic load |
| Power Efficiency | 96 % (min.) at 5 kΩ load - ensures minimal wasted power in battery- or thermally constrained designs |
| Voltage Conversion Efficiency | 99 % (min.) open-circuit - maintains near-ideal voltage inversion with negligible no-load loss |
| Supply Current | 80 µA (typ.) at 25°C - enables ultra-low-quiescent operation in always-on monitoring circuits |
| Operating Temperature | 0°C to +70°C - commercial-grade thermal envelope suitable for office, consumer, and non-harsh industrial environments |
Pinout & Package
ICL7660CBAZ is housed in an 8-lead Pb-free SOIC package (M8.15 drawing), surface-mount compatible with standard reflow profiles per J-STD-020.
| 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 use of smaller pump capacitors |
| 2 (CAP+) | Charge pump capacitor connection | Anode terminal for primary flying capacitor (C1); polarity-sensitive with polarized electrolytics |
| 3 (GND) | Ground reference | System ground return for all internal circuitry and external capacitors |
| 4 (CAP−) | Charge reservoir capacitor connection | Cathode terminal for output reservoir capacitor (C2); referenced to VOUT in negative conversion mode |
| 5 (VOUT) | Negative output terminal | Delivers inverted voltage (–VIN) or multiplied output; must not exceed GND potential to avoid latchup |
| 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 V+ ≤ 3.5 V to bypass internal regulator; leave floating for V+ > 3.5 V to prevent latchup |
| 8 (V+) | Positive supply input | Main power rail input; absolute max rating +13 V; supplies internal regulator, oscillator, and switch drivers |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) | Enables 3.5× oscillator frequency increase without external components, directly lowering output impedance and permitting 0.1 µF capacitors instead of 10 µF |
| LV pin control | Allows seamless transition between regulated (V+ > 3.5 V) and low-dropout bypass (V+ ≤ 3.5 V) operation, optimizing efficiency across full input range |
| Integrated latchup protection | Active substrate bias logic prevents destructive SCR conduction during startup, overcurrent, or transient overvoltage events |
| Guaranteed 96% power efficiency | Validated across temperature and load, ensuring predictable thermal budget and battery life in portable instrumentation |
| Pb-free SOIC packaging | RoHS-compliant M8.15 footprint with matte tin (e3) termination, compatible with SnPb and Pb-free soldering processes |
Applications
| RS232 Power Supply | Negative Supply for Data Acquisition |
|---|---|
Use Scenario: Generating ±12 V from a single 5 V microcontroller rail to drive legacy RS232 transceivers (e.g., MAX232 replacement). IC Role / Device Role / Timing Role: Charge-pump voltage inverter providing isolated negative rail; operates asynchronously with no timing constraints beyond oscillator stability. Use Value: Eliminates need for external inductors or transformers, reducing BOM count and board area while maintaining EIA-232 compliance under varying load conditions. | Use Scenario: Providing clean –5 V bias for precision op-amps and ADC reference buffers in 16-bit data acquisition front-ends. IC Role / Device Role / Timing Role: Low-noise negative voltage source; BOOST pin used to raise fOSC and suppress switching artifacts near sensitive analog inputs. Use Value: Achieves <60 Ω output impedance at 20 mA, minimizing load-induced offset drift and supporting stable 0.0015% FSR accuracy. |
| Supply Splitter (±VS) | Low-Voltage Sensor Bias |
Use Scenario: Converting a single 9 V battery into symmetrical ±4.5 V rails for rail-to-rail op-amp signal conditioning in portable test equipment. IC Role / Device Role / Timing Role: Bidirectional voltage splitter; leverages internal switch symmetry and LV pin grounding for efficient sub-3.5 V operation. Use Value: Delivers matched positive/negative outputs with <5% imbalance across 0–10 mA load, enabling true bipolar signal swing without DC offset. | Use Scenario: Biasing MEMS accelerometers or low-power analog front-ends requiring –1.8 V from a 1.8 V system rail. IC Role / Device Role / Timing Role: Ultra-low-voltage inverter; LV pin grounded to disable regulator, enabling functional operation down to 1.5 V input. Use Value: Maintains 99% open-circuit conversion efficiency at 1.5 V, preserving battery capacity in multi-year IoT sensor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660SCBAZ | Same pinout and function; rated for 0°C to +70°C; identical electrical specs but part of S-series family with tighter supply current guarantee (≤160 µA typ.) | Preferred where lower quiescent current is critical (e.g., battery-powered meters), but otherwise interchangeable in commercial-temp designs | Select ICL7660CBAZ for cost-optimized sourcing; choose ICL7660SCBAZ if datasheet-specified 80 µA typ. I+ is required for design validation |
| MAX660CPA+ | Different pinout (8-pin PDIP); higher 80 kHz oscillator (no BOOST pin); 100 µA I+ typ.; requires different capacitor values and layout | Better suited for space-constrained PDIP sockets or where higher-frequency operation reduces ripple without BOOST configuration | Not pin-compatible; requires PCB redesign; consider only if higher fOSC and lower ESR sensitivity outweigh layout change cost |
Compared with ICL7660SCBAZ, the ICL7660CBAZ offers identical functionality and package but slightly relaxed supply current limits; versus MAX660CPA+, it provides pin compatibility with legacy ICL7660 layouts and integrated BOOST control-critical for minimizing external component count in compact SOIC designs.
Availability
ICL7660CBAZ is available at Aetrix Electronics and suitable for RS232 power supplies, data acquisition negative rails, and supply splitting applications requiring stable component supply, RoHS compliance, and commercial-temperature reliability.
Supply support for ICL7660CBAZ 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 ICL7660CBAZ belongs to the Super Voltage Converter product line, designed specifically to replace legacy ICL7660 devices with extended voltage range, lower quiescent current, and enhanced latchup immunity for robust operation in real-world embedded systems.
FAQ
What is the maximum input voltage rating for the ICL7660CBAZ?
The ICL7660CBAZ has an absolute maximum supply voltage rating of +13.0 V. However, its specified operating supply voltage range is 1.5 V to 12 V. Operation above 12 V is outside guaranteed specifications and may compromise reliability or parametric performance. Always observe the 13 V absolute maximum limit to prevent permanent damage to the ICL7660CBAZ.
Can the ICL7660CBAZ be used as a voltage doubler?
Yes, the ICL7660CBAZ can be configured as a voltage doubler to generate up to +22.8 V from a 12 V input. This requires external diodes and capacitors arranged per Figure 18 in the FN3179 datasheet. The ICL7660CBAZ itself provides the switched-capacitor pumping action; the doubling function relies on external passive components and does not alter the ICL7660CBAZ's internal operation.
How does the BOOST pin affect the ICL7660CBAZ performance?
The BOOST pin (Pin 1) on the ICL7660CBAZ increases internal oscillator current, raising the nominal 10 kHz switching frequency to approximately 35 kHz when tied to V+. This reduces output impedance and ripple, allowing smaller external capacitors (e.g., 0.1 µF instead of 10 µF) while maintaining load regulation-especially valuable in space-constrained SOIC designs.
Is an external Schottky diode required for safe operation of the ICL7660CBAZ?
An external Schottky diode from VOUT to CAP− is recommended when the input voltage exceeds 5 V and has a rise rate greater than 2 V/µs, to prevent latchup caused by forward-biasing the internal Q4 body diode. For 5 V or lower supplies with controlled slew rates, the ICL7660CBAZ operates safely without external diodes across its full temperature range.
What is the purpose of the LV pin on the ICL7660CBAZ?
The LV pin on the ICL7660CBAZ controls internal regulator bypass: tie it to GND for input voltages ≤ 3.5 V to improve low-voltage efficiency and startup; leave it floating for inputs > 3.5 V to maintain latchup immunity. Incorrect LV pin connection-e.g., grounding it at 5 V-can cause device failure. This dual-mode capability makes the ICL7660CBAZ uniquely adaptable across wide input ranges.
ICL7660CBAZ 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):
- 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
ICL7660CBAZ FAQ
1.How can I place an order for ICL7660CBAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660CBAZ 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 ICL7660CBAZ reliable?
The price and inventory of ICL7660CBAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660CBAZ is usually 5 days.
3.What payment methods are accepted for ICL7660CBAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660CBAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660CBAZ?
ICL7660CBAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660CBAZ 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 ICL7660CBAZ?
For technical support, including ICL7660CBAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660CBAZ requirements.
6.How does Aetrix verify that ICL7660CBAZ is sourced from the original manufacturer or authorized distributors?
All ICL7660CBAZ 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 ICL7660CBAZ meets industry standards.
7.What is the process for return or replacement of ICL7660CBAZ?
All ICL7660CBAZ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660CBAZ, 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 ICL7660CBAZ part is unused and in its original packaging.
Return procedure for ICL7660CBAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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