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Renesas ICL7660AIBAZA
- Part No.:
- ICL7660AIBAZA
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660AIBAZA.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,115
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Product details
Overview
ICL7660AIBAZA from 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 Boost pin (Pin 1) enabling oscillator frequency up to 35kHz, 96% minimum power efficiency, and industrial temperature range (-40°C to +85°C). It is used in RS-232 power supplies and data acquisition systems requiring compact, low-quiescent-current negative rails.
For engineers reviewing the ICL7660AIBAZA datasheet, ICL7660AIBAZA pinout, ICL7660AIBAZA application, or ICL7660AIBAZA equivalent, key selection considerations include its extended 12V max input, LV pin bypass capability for sub-3.5V operation, guaranteed 120Ω max output resistance at 20mA, RoHS-compliant 8-lead SOIC package, and compatibility with polarized electrolytic pump/reservoir capacitors.
Technical Context
The ICL7660AIBAZA integrates an internal RC oscillator (10kHz nominal at 5V), voltage level translator, series DC regulator, 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 latch-up by dynamically adjusting switch body-node potentials based on VOUT feedback.
Operation supports multiple topologies: basic inverting converter (VOUT ≈ –VIN), voltage doubler (up to 22.8V from 12V), cascaded multiplication, and supply splitting. The LV pin enables regulator bypass below 3.5V for improved low-voltage efficiency, while BOOST pin connection to V+ raises oscillator frequency ~3.5× to reduce output impedance and ripple.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 12V - supports direct use from single-cell Li-ion, 3.3V/5V logic rails, and 9V/12V industrial supplies without pre-regulation. |
| Output Voltage Range | -1.5V to -12V - provides rail-to-rail inverted supply matching input magnitude, suitable for op-amp dual-supply or RS-232 driver biasing. |
| Supply Current (TA = 25°C) | 26µA to 100µA - ultra-low quiescent draw enables battery-powered instrumentation with multi-year standby life. |
| Oscillator Frequency | 5–35kHz - adjustable via BOOST pin or external capacitor; higher frequency allows smaller 0.1µF pump capacitors without sacrificing output current. |
| Output Source Resistance | ≤120Ω at 20mA (–40°C to +85°C) - defines worst-case voltage droop under load; enables ≥40mA peak sourcing when paralleled. |
| Power Efficiency | ≥96% at 5kΩ load - minimizes thermal rise in sealed enclosures and extends battery runtime in portable test equipment. |
| Operating Temperature | -40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor sensor nodes without derating. |
Pinout & Package
ICL7660AIBAZA is housed in an 8-lead Pb-free SOIC (N) package (JEDEC MS-012, pkg drawing M8.15), 3.9mm × 4.9mm footprint, 1.75mm height, with e3 matte tin terminations compatible with SnPb and Pb-free reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator boost control | Connecting to V+ triples oscillator frequency (~35kHz), lowering output impedance and enabling smaller pump capacitors (e.g., 0.1µF). |
| 2 (CAP+) | Charge pump capacitor node | AC-coupled terminal for primary pump capacitor (C1); polarity-sensitive-positive lead connects here for polarized electrolytics. |
| 3 (GND) | Ground reference | System ground return for internal regulator, oscillator, and switch logic; must be low-impedance to prevent noise coupling into VOUT. |
| 4 (CAP–) | Charge reservoir capacitor node | AC-coupled terminal for reservoir capacitor (C2); positive lead connects to GND for standard inverting configuration. |
| 5 (VOUT) | Negative output terminal | Delivers regulated negative voltage; must not exceed GND potential-external diode required if VOUT may float above GND during startup. |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to lower frequency (e.g., 100pF → 1kHz) or external clock (via 1kΩ series resistor) for noise-sensitive applications. |
| 7 (LV) | Low-voltage regulator bypass | Tie to GND for inputs ≤3.5V to disable internal regulator and improve efficiency; leave floating for 3.5–12V to prevent latch-up. |
| 8 (V+) | Positive input supply | Main power input; accepts 1.5–12V; requires local 2.2µF decoupling if source impedance >25Ω or dV/dt >2V/µs. |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) | Enables 35kHz oscillator operation without external clock, reducing output impedance by >50% and permitting 0.1µF pump capacitors in space-constrained designs. |
| LV pin bypass | Allows regulator disable below 3.5V, improving conversion efficiency and enabling reliable start-up from single alkaline or LiFePO₄ cells. |
| Guaranteed 96% power efficiency | Validated across full industrial temperature range, minimizing self-heating in enclosed industrial sensors and medical handheld devices. |
| 100% tested at 3V | Ensures functional reliability at low-voltage brownout conditions common in battery-backed systems and energy-harvesting applications. |
| Pb-free SOIC (M8.15) | RoHS-compliant, JEDEC-standard 8-lead package with 1.27mm pitch, compatible with automated SMT assembly and IPC/JEDEC J-STD-020 reflow profiles. |
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 inverter providing isolated negative voltage; no timing synchronization required-self-oscillating architecture. Use Value: Eliminates need for external inductors or transformers, reducing BOM cost and PCB area by >40% versus inductive DC/DC solutions. |
Use Scenario: Creating clean –5V rail for precision ADC reference buffers and op-amp signal conditioning stages in portable test meters. IC Role / Device Role / Timing Role: Low-noise negative supply generator; BOOST pin used to raise frequency above audio band, minimizing audible capacitor whine. Use Value: Output source resistance ≤120Ω ensures <10mV droop at 20mA load, preserving 16-bit ADC accuracy without post-regulation. |
| Voltage Splitter for Single-Supply Op-Amps | Battery-Powered Instrumentation Bias |
|
Use Scenario: Deriving ±3.75V from a 7.5V Li-ion cell to power rail-to-rail op-amps in handheld oscilloscope front-ends. IC Role / Device Role / Timing Role: Bidirectional supply splitter; LV pin tied to GND to optimize efficiency at 3.75V per rail. Use Value: Enables true bipolar operation from single-cell battery, extending runtime by avoiding linear regulators' dropout losses. |
Use Scenario: Providing –2.5V bias for pH sensor amplifiers and thermocouple cold-junction compensation in field-deployed environmental monitors. IC Role / Device Role / Timing Role: Ultra-low-IQ (26µA typ.) negative supply generator; operates continuously during sleep mode to maintain sensor bias. Use Value: Supports >5-year battery life on two AA cells while maintaining sensor offset stability within ±50µV over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660SIBAZ | Wider temperature range (–40°C to +85°C same), but lower max input (10V vs. 12V) and higher typical supply current (80µA vs. 26µA at 3V). | Preferred where absolute max 12V input is not required and legacy ICL7660S footprint compatibility is critical. | Select ICL7660AIBAZA when operating up to 12V or requiring lowest quiescent current; choose ICL7660SIBAZ for drop-in replacement in existing ICL7660S designs. |
| MAX1044CSA+ | Same 8-pin SOIC package and inverting function, but fixed 10kHz oscillator (no BOOST pin), higher 120µA IQ, and narrower 1.5V–6V input range. | Suitable for cost-sensitive consumer applications where 6V max input suffices and frequency flexibility is unnecessary. | Choose ICL7660AIBAZA for industrial-grade 12V tolerance, BOOST-driven ripple reduction, and extended battery life; select MAX1044CSA+ only for legacy MAX1044-based designs. |
Compared with ICL7660SIBAZ and MAX1044CSA+, the ICL7660AIBAZA delivers superior 12V input headroom, lowest 26µA supply current at 3V, and unique BOOST pin control-making it optimal for high-reliability, long-life, and space-constrained industrial and portable instrumentation.
Availability
ICL7660AIBAZA is available at Aetrix Electronics and suitable for RS-232 interface design, portable data acquisition systems, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ICL7660AIBAZA 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 SoC solutions for automotive, industrial, and IoT applications with emphasis on reliability and long-term support.
The ICL7660A belongs to Renesas' legacy precision analog portfolio, designed specifically for low-power, capacitor-based voltage conversion in space- and cost-constrained embedded systems where inductorless operation is mandatory.
FAQ
What is the maximum input voltage rating for the ICL7660AIBAZA?
The ICL7660AIBAZA has an absolute maximum supply voltage of +13.0V, with guaranteed operation up to +12V across its full industrial temperature range (–40°C to +85°C). Exceeding 12V risks violating the specified electrical limits and may cause latch-up or parametric shift. Always observe the 13.0V absolute maximum rating to ensure long-term reliability of the ICL7660AIBAZA.
How does the BOOST pin (Pin 1) affect the performance of the ICL7660AIBAZA?
Connecting the BOOST pin of the ICL7660AIBAZA to V+ increases the internal oscillator frequency from ~10kHz to ~35kHz. This reduces output impedance and ripple, enabling smaller pump capacitors (e.g., 0.1µF instead of 10µF) without sacrificing output current capability. The ICL7660AIBAZA's BOOST functionality is unique among pin-compatible charge pumps and directly improves dynamic response in varying-load applications.
Can the ICL7660AIBAZA operate from a 1.5V supply, and what configuration is required?
Yes, the ICL7660AIBAZA supports 1.5V minimum input. To ensure reliable start-up and efficiency at this voltage, the LV pin (Pin 7) must be tied to GND to bypass the internal series regulator. This configuration is validated in the datasheet and guarantees operation down to 1.5V. The ICL7660AIBAZA remains fully functional across the entire 1.5V–12V range with appropriate LV pin handling.
What is the guaranteed output source resistance of the ICL7660AIBAZA at 20mA load?
The ICL7660AIBAZA guarantees ≤120Ω output source resistance at 20mA load across the full industrial temperature range (–40°C to +85°C), as specified in the Electrical Specifications table on page 3 of FN3179 Rev 7.01. This value includes worst-case process, voltage, and temperature variation and defines the maximum voltage droop (≤2.4V) under 20mA load-critical for precision analog rail generation.
Is an external Schottky diode required for safe operation of the ICL7660AIBAZA?
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 >2V/µs, or when transient conditions could cause VOUT to exceed CAP– potential-conditions that risk forward-biasing Q4's body diode and triggering latch-up. For stable 3.3V or 5V supplies with controlled ramp rates, the ICL7660AIBAZA operates safely without external diodes.
ICL7660AIBAZA 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:
- 3kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660AIBAZA FAQ
1.How can I place an order for ICL7660AIBAZA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660AIBAZA 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 ICL7660AIBAZA reliable?
The price and inventory of ICL7660AIBAZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660AIBAZA is usually 5 days.
3.What payment methods are accepted for ICL7660AIBAZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660AIBAZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660AIBAZA?
ICL7660AIBAZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660AIBAZA 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 ICL7660AIBAZA?
For technical support, including ICL7660AIBAZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660AIBAZA requirements.
6.How does Aetrix verify that ICL7660AIBAZA is sourced from the original manufacturer or authorized distributors?
All ICL7660AIBAZA 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 ICL7660AIBAZA meets industry standards.
7.What is the process for return or replacement of ICL7660AIBAZA?
All ICL7660AIBAZA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660AIBAZA, 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 ICL7660AIBAZA part is unused and in its original packaging.
Return procedure for ICL7660AIBAZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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