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Renesas ICL7660CBA-T
- Part No.:
- ICL7660CBA-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660CBA-T.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,715
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Product details
Overview
ICL7660CBA-T 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 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 - widely used in RS-232 power supplies and data acquisition systems.
For engineers reviewing the ICL7660CBA-T datasheet, ICL7660CBA-T pinout, ICL7660CBA-T application, or ICL7660CBA-T equivalent, key selection considerations 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 (0°C to +70°C).
Technical Context
The ICL7660CBA-T implements a switched-capacitor charge-pump topology 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 monitors VOUT to dynamically adjust switch substrates and prevent latch-up - critical during start-up and short-circuit conditions.
It features dual-mode operation: internal oscillator (free-running or capacitor-tuned) or external clock drive (via OSC pin with 1 kΩ series resistor), with pump frequency always half the oscillator frequency. The LV pin bypasses the internal series regulator when tied to GND, enabling stable operation down to 1.5V input; left floating above 3.5V to maintain latch-up immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 12V - supports single-cell Li-ion, 3.3V/5V logic rails, and legacy 12V systems without external regulation. |
| Oscillator Frequency | 10 kHz nominal (5–35 kHz adjustable) - determines charge-transfer rate and directly impacts output impedance and ripple. |
| Output Source Resistance | 60 Ω typical at 20 mA, 5V input - defines maximum deliverable current before significant voltage droop under load. |
| Power Efficiency | ≥96% at 5 kΩ load - minimizes heat generation and extends battery life in portable instrumentation. |
| Voltage Conversion Efficiency | ≥99% open-circuit - ensures near-ideal negative rail generation with minimal quiescent loss. |
| Supply Current | 80 µA typical at 5V, 25°C - enables ultra-low-power operation in always-on sensor interfaces. |
| Operating Temperature | 0°C to +70°C - qualified for commercial and industrial control applications with ambient thermal cycling. |
Pinout & Package
ICL7660CBA-T is housed in an 8-lead SOIC (Small Outline Integrated Circuit) package per JEDEC MS-012, 1.27 mm pitch, RoHS-compliant matte tin finish (e3). Thermal resistance θJA = 160°C/W, θJC = 48°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator boost control | Connecting to V+ increases oscillator current and raises frequency ~3.5×, lowering output impedance for compact capacitor designs. |
| 2 (CAP+) | Charge pump capacitor connection | Anode of external pump capacitor C1; switched between V+ and CAP− to transfer charge into reservoir. |
| 3 (GND) | Ground reference | Primary return path for internal logic, oscillator, and switch drivers; must be low-impedance for stable operation. |
| 4 (CAP−) | Charge reservoir capacitor connection | Cathode of external reservoir capacitor C2; forms negative output node with VOUT via internal switching. |
| 5 (VOUT) | Negative output terminal | Delivers regulated negative voltage; must not exceed GND potential to avoid latch-up (requires protection diode in high-dV/dt applications). |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to lower frequency or external TTL clock (with 1 kΩ series resistor) for precise synchronization. |
| 7 (LV) | Low-voltage mode enable | Tie to GND for 1.5–3.5V operation to bypass internal regulator; leave floating for >3.5V to prevent latch-up. |
| 8 (V+) | Positive supply input | Primary power input; feeds internal regulator, oscillator, and switch drivers; max rating 13V absolute. |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) | Enables 3.5× oscillator frequency increase without external components - reduces required capacitor size by ~10× for same output impedance. |
| LV pin logic | Hardware-selectable low-voltage mode eliminates regulator dropout, enabling reliable –1.5V output from 1.5V input. |
| Integrated latch-up protection | Active substrate bias control prevents destructive SCR conduction during start-up, overloads, or transients - no external Schottky diode required in most cases. |
| Wide input compatibility | Operates from 1.5V to 12V without external regulators - supports direct integration into mixed-voltage systems (e.g., 3.3V MCU + ±5V analog front-end). |
| Pb-free SOIC packaging | RoHS-compliant e3 matte tin termination - compatible with both SnPb and Pb-free reflow profiles per J-STD-020 MSL3. |
Applications
| RS-232 Power Supply | Negative Rail for Data Acquisition |
|---|---|
Use Scenario: Generating ±12V from a single 5V microcontroller supply to drive legacy RS-232 transceivers (e.g., MAX232 replacement). IC Role / Device Role / Timing Role: Charge-pump voltage converter providing isolated negative rail; no timing interface required - operates autonomously via internal oscillator. Use Value: Eliminates need for external inductors or transformers, reducing BOM cost and PCB area while meeting TIA-232-E voltage compliance. | Use Scenario: Supplying –5V to precision op-amps and ADC references in portable multimeters or sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Low-noise negative voltage source; LV pin configured for 3.3V input to maximize efficiency at battery-limited loads. Use Value: Delivers stable –5V with <120 Ω output resistance at 20 mA, enabling 16-bit ADC performance without dedicated DC/DC converters. |
| Voltage Splitter for Bipolar Op-Amps | Low-Power Instrumentation Bias |
Use Scenario: Converting a 10V single-ended supply into ±5V rails for rail-to-rail op-amp stages in handheld test equipment. IC Role / Device Role / Timing Role: Bidirectional charge-pump acting as supply splitter; uses internal switches in symmetric configuration to balance loading on both rails. Use Value: Achieves matched ±5V outputs with <5% imbalance under 10 mA load - avoids costly dual-output isolated DC/DC modules. | Use Scenario: Providing –3.3V bias to photodiode transimpedance amplifiers in optical smoke detectors with 10-year battery life requirements. IC Role / Device Role / Timing Role: Ultra-low-quiescent-current voltage inverter; operates at 1.5V input with LV pin grounded to minimize supply current. Use Value: Draws only 26 µA typical at 3V, extending CR2032 battery life beyond 8 years in standby mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660ACBAZA-T | Pb-free SOIC variant with identical electrical specs and pinout; replaces obsolete ICL7660ACBA-T per Renesas ordering guide. | No functional difference; fully interchangeable in new designs requiring RoHS compliance. | Select ICL7660ACBAZA-T for new production to ensure long-term availability and Pb-free manufacturing alignment. |
| MAX1044CPA+ | Higher 45 kHz max oscillator frequency; 100 µA typical supply current; requires external timing capacitor for frequency control. | Better high-frequency ripple suppression but higher quiescent draw - preferred in noise-sensitive audio biasing. | Choose MAX1044CPA+ when lower output impedance at light loads is critical and board space allows larger timing capacitor. |
Compared with ICL7660CBA-T, ICL7660ACBAZA-T offers identical functionality with updated RoHS compliance, while MAX1044CPA+ trades higher supply current for greater oscillator flexibility and lower output impedance - making it suitable for high-precision analog bias where ripple matters more than battery life.
Availability
ICL7660CBA-T is available at Aetrix Electronics and suitable for RS-232 power supplies, data acquisition system biasing, and portable instrumentation requiring stable component supply with commercial-temperature reliability and RoHS-compliant packaging.
Supply support for ICL7660CBA-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 (formerly Intersil) is a global semiconductor leader specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and communications infrastructure.
The ICL7660 product line was designed to replace legacy ICL7660 devices with enhanced efficiency, wider voltage range, and robust latch-up immunity - targeting cost-sensitive, space-constrained analog power applications.
FAQ
What is the maximum input voltage rating for the ICL7660CBA-T?
The ICL7660CBA-T has an absolute maximum supply voltage rating of +13.0V. Continuous operation is specified up to +12V across the full commercial temperature range (0°C to +70°C). Exceeding 13V risks permanent damage due to internal junction breakdown or latch-up, as confirmed in the Absolute Maximum Ratings table on page 3 of FN3179 Rev 7.01. Always observe derating guidelines for long-term reliability.
Can the ICL7660CBA-T generate positive voltage doubling?
Yes, the ICL7660CBA-T can be configured as a voltage doubler to generate up to +22.8V from a +12V input, as documented in Figure 18 of the datasheet. This requires external diodes (D1, D2) and capacitors (C1, C2) in a charge-pump doubler topology. Output source impedance remains ~60 Ω at 10 mA with 5V input, making it suitable for low-current biasing applications like op-amp rails.
How does the LV pin affect ICL7660CBA-T operation below 3.5V input?
When the LV pin is tied to GND, the internal series regulator is bypassed, allowing the ICL7660CBA-T to operate down to 1.5V input while maintaining stable –1.5V output. This configuration reduces dropout and improves efficiency at low voltages. Leaving LV floating above 3.5V activates the regulator to prevent latch-up - a hardware-enforced safety mechanism verified across temperature ranges.
Is an external Schottky diode required for ICL7660CBA-T reliability?
An external Schottky diode from VOUT to CAP− is recommended only when the input voltage exceeds 5V and has a rise rate >2 V/µs, per the "Do's and Don'ts" section (page 8). This prevents forward-biasing Q4's body diode and subsequent latch-up. For standard 5V applications with controlled slew rates, the ICL7660CBA-T operates reliably without external diodes, as confirmed by latch-up testing in FN3179.
What is the typical oscillator frequency of the ICL7660CBA-T at 5V supply?
The ICL7660CBA-T oscillates at a nominal frequency of 10 kHz when the BOOST pin is open or grounded and no external capacitor is connected to the OSC pin, as specified in the Electrical Specifications table (page 3). This frequency increases to ~35 kHz when BOOST is tied to V+, and decreases with added capacitance on OSC - all values are production-tested and guaranteed across temperature.
ICL7660CBA-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):
- 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-T FAQ
1.How can I place an order for ICL7660CBA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660CBA-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 ICL7660CBA-T reliable?
The price and inventory of ICL7660CBA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660CBA-T is usually 5 days.
3.What payment methods are accepted for ICL7660CBA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660CBA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660CBA-T?
ICL7660CBA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660CBA-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 ICL7660CBA-T?
For technical support, including ICL7660CBA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660CBA-T requirements.
6.How does Aetrix verify that ICL7660CBA-T is sourced from the original manufacturer or authorized distributors?
All ICL7660CBA-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 ICL7660CBA-T meets industry standards.
7.What is the process for return or replacement of ICL7660CBA-T?
All ICL7660CBA-T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660CBA-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 ICL7660CBA-T part is unused and in its original packaging.
Return procedure for ICL7660CBA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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