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Renesas ICL7660ACBA-T
- Part No.:
- ICL7660ACBA-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660ACBA-T.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,821
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Product details
Overview
ICL7660ACBA-T from Renesas Electronics is a monolithic CMOS charge-pump voltage converter IC that performs positive-to-negative voltage conversion across 1.5V–12V input, delivering complementary -1.5V to -12V output with only two external capacitors. It features a Boost pin (Pin 1) enabling oscillator frequency up to 35kHz, 96% minimum power efficiency, and guaranteed operation over 0°C to +70°C commercial temperature range in 8-lead SOIC package.
For engineers reviewing the ICL7660ACBA-T datasheet, ICL7660ACBA-T pinout, ICL7660ACBA-T application, or ICL7660ACBA-T equivalent, this device serves as an enhanced drop-in replacement for legacy ICL7660 designs requiring improved low-current operation, extended supply range, and latchup immunity in RS-232 power supplies, data acquisition rails, and ±5V logic splitting.
Technical Context
The ICL7660ACBA-T integrates a regulated DC supply, 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 internal substrate bias logic dynamically adjusts switch body-node voltages to prevent latchup during startup and short-circuit conditions.
Oscillator frequency is factory trimmed to 10kHz at 5V (typical), adjustable via external capacitor on OSC pin or by driving BOOST pin high to increase frequency ~3.5×. The LV pin enables bypass of the internal series regulator for improved low-voltage operation below 3.5V, while floating it above 3.5V ensures latchup-free performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 12V - supports single-supply systems from low-power sensors to industrial 12V rails |
| Output Voltage | -1.5V to -12V - complementary negative rail without inductors or transformers |
| Supply Current (25°C) | 26µA to 100µA - enables ultra-low-quiescent operation in battery-powered instrumentation |
| Oscillator Frequency | 5kHz–35kHz - adjustable via BOOST pin or external capacitor for ripple/impedance tradeoffs |
| Power Efficiency | ≥96% at 5kΩ load - minimizes heat generation and input power draw in compact layouts |
| Output Source Resistance | 97Ω (typ) at 10mA, 3V - defines maximum deliverable current before regulation collapse |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control and interface modules |
Pinout & Package
ICL7660ACBA-T is housed in an 8-lead SOIC (Small Outline Integrated Circuit) package with standard 1.27mm pitch, RoHS-compliant matte tin plating, and M8.15 package drawing. Thermal resistance θJA = 160°C/W (typ).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator boost control | Connect to V+ to raise internal oscillator frequency ~3.5×, reducing output impedance and ripple |
| 2 (CAP+) | Charge pump capacitor connection | Node where external pump capacitor C1 connects; polarity-sensitive for electrolytic types |
| 3 (GND) | Ground reference | System ground return for all internal circuitry and external capacitors |
| 4 (CAP-) | Charge reservoir capacitor connection | Node where external reservoir capacitor C2 connects; cathode tied to GND for polarized caps |
| 5 (VOUT) | Negative output terminal | Delivers regulated negative voltage; must not exceed GND potential to avoid latchup |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to lower frequency or external clock (via 1kΩ series resistor) |
| 7 (LV) | Low-voltage mode enable | Tie to GND for <3.5V operation; leave open for ≥3.5V to prevent latchup |
| 8 (V+) | Positive input supply | Primary power input; absolute max 13V; requires local decoupling for fast-rising supplies |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) | Enables 35kHz oscillator operation, allowing use of smaller 0.1µF external capacitors while maintaining low output impedance |
| LV pin control | Allows regulator bypass below 3.5V, improving efficiency and start-up reliability in low-voltage sensor interfaces |
| Guaranteed 99% open-circuit conversion efficiency | Minimizes no-load power loss in always-on monitoring circuits and standby power domains |
| SCR latchup protection | Integrated substrate bias network prevents destructive latchup during output shorts or transient overvoltage events |
| Pb-free SOIC packaging | RoHS-compliant M8.15 package compatible with SnPb and Pb-free reflow processes per J-STD-020 |
Applications
| RS-232 Power Generation | Negative Rail for Data Acquisition |
|---|---|
Use Scenario: Generating ±12V from a single 5V microcontroller supply to drive legacy RS-232 transceivers. IC Role / Device Role / Timing Role: Charge-pump voltage converter providing isolated negative supply without inductors or transformers. Use Value: Eliminates need for external DC-DC converters, reducing BOM cost and board area while meeting TIA-232E voltage compliance. | Use Scenario: Supplying clean -5V bias to precision op-amps and ADC reference buffers in portable test equipment. IC Role / Device Role / Timing Role: Low-noise negative voltage source with <100Ω output impedance at 10mA load. Use Value: Enables true bipolar analog signal conditioning with minimal PSRR degradation and no magnetic coupling noise. |
| ±5V Logic Supply Splitting | Low-Power Sensor Biasing |
Use Scenario: Deriving symmetrical ±5V rails from a single 5V USB port for mixed-signal FPGA I/O banks. IC Role / Device Role / Timing Role: Bidirectional voltage splitter operating in dual-mode (inverter + doubler) configuration. Use Value: Provides matched positive and negative rails with shared pump driver, simplifying layout and reducing component count. | Use Scenario: Providing -3.3V bias to MEMS microphone preamplifiers in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Ultra-low-quiescent (26µA typ) negative supply generator supporting 1.5V–3.3V input range. Use Value: Extends battery life in always-listening audio applications while maintaining SNR integrity through low-ripple output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660SCBAZ-T | Same architecture but rated for 0°C to +70°C; slightly higher quiescent current (80µA typ at 5V) | Identical pinout and function; optimized for cost-sensitive commercial designs with marginally relaxed efficiency | Select when sourcing new production lots-ICL7660SCBAZ-T is active and widely stocked, whereas ICL7660ACBA-T is legacy-marked |
| MAX1044CSA+ | Higher max input (16V), wider temp range (-40°C to +85°C), but 120µA typical supply current at 5V | Better suited for industrial environments; requires different capacitor sizing due to 25kHz base oscillator | Choose for extended temperature operation or higher input voltage headroom; verify layout compatibility due to different pin 1 (COMP) function |
Compared with ICL7660ACBA-T, ICL7660SCBAZ-T offers identical functionality with updated Pb-free packaging and broader distributor availability, while MAX1044CSA+ trades lower quiescent current for wider voltage/temperature coverage and different oscillator control-making it suitable for ruggedized designs where efficiency is secondary to environmental robustness.
Availability
ICL7660ACBA-T is available at Aetrix Electronics and suitable for RS-232 power generation, data acquisition negative rails, and ±5V logic splitting requiring stable component supply across commercial temperature grades.
Supply support for ICL7660ACBA-T 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 microcontrollers, analog power, and connectivity solutions for automotive, industrial, and enterprise applications.
The ICL7660A product line was designed specifically to upgrade legacy ICL7660-based systems with extended voltage range, lower supply current, and enhanced latchup immunity-targeting interface power, sensor biasing, and portable instrumentation.
FAQ
What is the maximum input voltage rating for the ICL7660ACBA-T?
The ICL7660ACBA-T has an absolute maximum supply voltage rating of +13.0V. Continuous operation is specified up to +12V across the full 0°C to +70°C temperature range. Exceeding 13V risks permanent damage due to internal junction breakdown or SCR latchup, especially if the LV pin is incorrectly tied to ground above 3.5V. Always observe derating guidelines in the Absolute Maximum Ratings table on page 3 of FN3179 Rev 7.01 when designing for long-term reliability.
Can the ICL7660ACBA-T generate positive voltage doubling?
Yes, the ICL7660ACBA-T can be configured as a positive voltage doubler using external diodes and capacitors per Figure 18 in FN3179 Rev 7.01. With a 5V input, it delivers approximately 9.4V output (2×VIN minus two diode forward drops). This mode uses the same internal charge-pump switches but reorients external components to stack voltage rather than invert it. Output source resistance remains ~60Ω at 10mA, and efficiency drops slightly versus inverting mode due to added diode losses.
How does the BOOST pin affect output performance of the ICL7660ACBA-T?
Connecting the BOOST pin (Pin 1) of the ICL7660ACBA-T to V+ increases the internal oscillator frequency from ~10kHz to ~35kHz. This reduces output impedance and ripple by enabling faster capacitor charging cycles, permitting use of smaller 0.1µF external capacitors instead of 10µF while maintaining comparable load capability. However, higher frequency increases switching losses slightly, so efficiency may dip ~0.5–1% under heavy loads compared to free-running mode.
Is an external Schottky diode required for safe operation of the ICL7660ACBA-T?
An external Schottky diode from VOUT (Pin 5) to CAP- (Pin 4) is required only when the input voltage exceeds 5V *and* has a rise rate greater than 2V/µs, as stated in the "Do's and Don'ts" section (page 8 of FN3179 Rev 7.01). This prevents latchup caused by forward-biasing the Q4 body diode during fast transients. For standard 5V logic supplies with proper decoupling, no external diode is needed-the ICL7660ACBA-T operates safely without one across its full rated voltage and temperature range.
What is the purpose of the LV pin on the ICL7660ACBA-T?
The LV (Low-Voltage) pin on the ICL7660ACBA-T controls the internal series regulator. When tied to GND, it bypasses the regulator to improve efficiency and start-up behavior for inputs below 3.5V-critical for 1.5V–3.3V battery-powered systems. When left floating, the regulator engages for inputs ≥3.5V to provide latchup immunity. Incorrect LV pin connection (e.g., grounding it at 5V) causes destructive latchup, so adherence to the voltage threshold rule is mandatory for reliable ICL7660ACBA-T operation.
ICL7660ACBA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 3kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660ACBA-T FAQ
1.How can I place an order for ICL7660ACBA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660ACBA-T 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 ICL7660ACBA-T reliable?
The price and inventory of ICL7660ACBA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660ACBA-T is usually 5 days.
3.What payment methods are accepted for ICL7660ACBA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660ACBA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660ACBA-T?
ICL7660ACBA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660ACBA-T 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 ICL7660ACBA-T?
For technical support, including ICL7660ACBA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660ACBA-T requirements.
6.How does Aetrix verify that ICL7660ACBA-T is sourced from the original manufacturer or authorized distributors?
All ICL7660ACBA-T 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 ICL7660ACBA-T meets industry standards.
7.What is the process for return or replacement of ICL7660ACBA-T?
All ICL7660ACBA-T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660ACBA-T, 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 ICL7660ACBA-T part is unused and in its original packaging.
Return procedure for ICL7660ACBA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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