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Renesas ICL7660SIPAZ
- Part No.:
- ICL7660SIPAZ
- Manufacturer:
- Renesas
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7660SIPAZ.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,308
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Product details
Overview
ICL7660SIPAZ from Renesas is a monolithic CMOS charge-pump voltage converter IC that performs positive-to-negative supply conversion (e.g., +5V → –5V) with 1.5V to 12V input range, 99% open-circuit voltage conversion efficiency, and 60Ω typical output source resistance at 20mA load. It integrates oscillator, level translator, regulator, and four MOS switches in an 8-lead PDIP package for RS-232 power, data acquisition, and dual-rail instrumentation.
For engineers reviewing the ICL7660SIPAZ datasheet, ICL7660SIPAZ pinout, ICL7660SIPAZ application, or ICL7660SIPAZ equivalent, this device supports boost-mode frequency scaling (up to ~35kHz), LV-bypass for sub-3.5V operation, external clock synchronization, and parallel/cascaded configurations - all while requiring only two non-critical 10µF electrolytic capacitors.
Technical Context
The ICL7660SIPAZ implements a switched-capacitor negative voltage converter using four internal MOS switches (one P-channel, three N-channel) controlled by a divide-by-2 oscillator. Its substrate bias logic network dynamically adjusts switch body connections to prevent latch-up across –40°C to +85°C.
It features dual operating modes: standard mode (LV pin floating for V+ > 3.5V) and low-voltage mode (LV tied to GND for 1.5V–3.5V input), with oscillator frequency adjustable via BOOST pin (×3.5 gain), external capacitor (down to 1kHz), or external TTL/CMOS clock (with 1kΩ series resistor).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 12V - supports single-cell LiFePO₄, 3.3V/5V logic rails, and industrial 12V supplies without external regulation. |
| Output Voltage | –1.5V to –12V - complementary negative rail with <±0.1V deviation under no-load conditions. |
| Oscillator Frequency | 5–35kHz - factory-trimmed 10kHz nominal (at 5V, 25°C); scalable via BOOST pin or external OSC capacitor. |
| Output Source Resistance | 60Ω typical at 20mA, 5V - defines maximum load regulation error (e.g., 1.2V drop at 20mA); degrades to 120Ω over full temperature range. |
| Power Efficiency | 96% min at 5kΩ load - enables high-efficiency rail splitting without heat sinks in space-constrained analog front-ends. |
| Voltage Conversion Efficiency | 99% min open-circuit - ensures minimal quiescent loss when driving high-impedance inputs like op-amp bias networks. |
| Supply Current | 80µA typical at 25°C - ultra-low quiescent draw suitable for battery-powered portable instrumentation. |
Pinout & Package
ICL7660SIPAZ is housed in an 8-lead plastic dual in-line package (PDIP) with Pb-free (RoHS-compliant) finish, rated for –40°C to +85°C industrial operation. Lead spacing is 0.300", body width 0.355", and thermal resistance θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency control input | Connecting to V+ increases switching frequency ~3.5×, reducing output impedance and enabling smaller external capacitors (e.g., 0.1µF instead of 10µF). |
| 2 (CAP+) | Charge pump capacitor connection | Anode terminal of primary flying capacitor (C1); polarity-sensitive - must connect + lead of polarized electrolytic to this pin. |
| 3 (GND) | Ground reference | System ground return for internal regulator, oscillator, and switch logic; serves as reference for LV and VOUT terminals. |
| 4 (CAP–) | Charge reservoir capacitor connection | Cathode terminal of output reservoir capacitor (C2); polarity-sensitive - + lead of C2 connects to GND (pin 3). |
| 5 (VOUT) | Negative output terminal | Delivers regulated negative voltage (–VIN); must not exceed GND potential to avoid latch-up; requires Schottky clamp if VIN > 5.5V with fast rise time. |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to lower frequency (e.g., 100pF → 1kHz) or external clock (TTL/CMOS, 1kΩ series resistor required). |
| 7 (LV) | Low-voltage mode enable | Tie to GND for 1.5–3.5V operation to bypass internal regulator; leave floating for 3.5–12V to prevent latch-up and ensure SCR immunity. |
| 8 (V+) | Positive input supply | Primary power input; accepts 1.5–12V DC; internal regulator drops ~0.5V in standard mode, contributing to efficiency trade-off at low VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) frequency scaling | Enables 3.5× higher oscillator frequency to reduce output impedance and allow use of 0.1µF capacitors - critical for space-constrained surface-mount designs. |
| LV pin for dual-voltage-range operation | Supports seamless transition between 1.5–3.5V (LV = GND) and 3.5–12V (LV = open) without external components or PCB changes. |
| 99% open-circuit voltage conversion efficiency | Minimizes no-load power loss in always-on instrumentation circuits, extending battery life and reducing thermal stress on passive components. |
| Integrated latch-up protection | Active substrate bias control prevents destructive SCR conduction during start-up, short-circuit, or transient overvoltage events - eliminates need for external diodes in most designs. |
| Pb-free RoHS-compliant PDIP packaging | Meets IPC/JEDEC J-STD-020 MSL requirements for wave-solder assembly; compatible with SnPb and Pb-free soldering processes. |
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 (e.g., MAX232 replacement). IC Role / Device Role / Timing Role: Charge-pump voltage inverter providing isolated negative rail; operates at 10kHz free-running frequency with no external timing components. Use Value: Eliminates need for inductive DC-DC converters - reduces EMI, BOM cost, and board area while maintaining RS-232 signal integrity over 15m cable runs. |
Use Scenario: Supplying –5V to precision ADC reference buffers and op-amp input stages in portable multimeters or sensor signal conditioners. IC Role / Device Role / Timing Role: Low-noise negative supply generator; configured with BOOST pin active to minimize output impedance (<30Ω) under dynamic load steps. Use Value: Enables true bipolar input ranges (e.g., ±2.5V) with <0.01% gain error drift, directly supporting 16-bit SAR ADC performance without external regulation. |
| Logic Supply Splitting | Portable Instrumentation Power |
|
Use Scenario: Converting a single +9V alkaline battery into ±4.5V rails for rail-to-rail op-amps and analog comparators in handheld test equipment. IC Role / Device Role / Timing Role: Bidirectional voltage splitter; LV pin left floating for optimal efficiency at 9V input, with C1/C2 = 22µF low-ESR tantalum. Use Value: Doubles usable battery energy by enabling symmetric analog circuitry - extends runtime by 35% vs. single-rail solutions with virtual ground. |
Use Scenario: Providing –3.3V bias for MEMS microphone preamplifiers and –5V for LCD contrast control in battery-powered medical monitors. IC Role / Device Role / Timing Role: Ultra-low-quiescent inverter; LV pin tied to GND to maximize efficiency at 3.3V input, with OSC pin loaded to 2kHz for lowest idle current. Use Value: Achieves 25µA total system standby current - enables >1-year shelf life on CR2032 coin cell without compromising audio fidelity or display contrast. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660SCPAZ | Same die, 0°C to +70°C commercial temp grade; identical pinout, electrical specs, and package (8-lead PDIP). | Not qualified for industrial environments; unsuitable for automotive or outdoor instrumentation where –40°C startup is required. | Select ICL7660SCPAZ only for cost-sensitive consumer electronics with ambient temperature <70°C. |
| MAX660CPA+ | Higher 80kHz max oscillator frequency; 120µA typical supply current; requires external timing resistor; different pinout (no BOOST/LV pins). | Lacks LV-bypass mode and integrated latch-up protection - mandates external Schottky diode and careful layout to avoid failure at V+ > 5.5V. | Choose MAX660CPA+ only when higher switching frequency justifies added complexity and reduced reliability margin. |
Compared with ICL7660SCPAZ, the ICL7660SIPAZ delivers guaranteed –40°C operation and identical performance at no cost premium; versus MAX660CPA+, it offers simpler design-in, lower quiescent current, and intrinsic latch-up immunity - making it the robust choice for industrial and portable analog systems.
Availability
ICL7660SIPAZ is available at Aetrix Electronics and suitable for RS-232 interface design, portable instrumentation power, and precision data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ICL7660SIPAZ 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 trusted microcontrollers, analog power, and SoC solutions for automotive, industrial, and enterprise applications.
The ICL7660SIPAZ belongs to Renesas' legacy precision analog portfolio, designed specifically for low-noise, low-power charge-pump voltage conversion in instrumentation, medical devices, and industrial control systems where reliability and temperature stability are critical.
FAQ
What is the minimum input voltage supported by the ICL7660SIPAZ?
The ICL7660SIPAZ supports a minimum input voltage of 1.5V when the LV pin is tied to GND to bypass the internal series regulator. At this setting, it maintains functional negative voltage conversion down to 1.5V input, enabling use with single-cell LiFePO₄ or NiMH batteries. Operation below 1.5V is not specified or guaranteed for the ICL7660SIPAZ.
Can the ICL7660SIPAZ be used as a voltage doubler?
Yes, the ICL7660SIPAZ can be configured as a positive voltage doubler (e.g., +5V → +10V) using external diodes per Figure 18 in the FN3179 datasheet. In this mode, it delivers up to 22.8V output from a 12V input, with output source resistance ~60Ω at 10mA load. The ICL7660SIPAZ does not integrate diodes, so external Schottky diodes are required for doubling operation.
Does the ICL7660SIPAZ require external diodes for latch-up protection?
No - the ICL7660SIPAZ incorporates active substrate bias control and improved SCR latch-up protection, eliminating the need for external diodes in standard operation. An external Schottky diode from VOUT to CAP– is only required when the input voltage exceeds 5.5V *and* has a rise rate >2V/µs, per the "Do's and Don'ts" section of the FN3179 datasheet.
How does the BOOST pin affect output performance of the ICL7660SIPAZ?
Connecting the BOOST pin (Pin 1) of the ICL7660SIPAZ to V+ increases the internal oscillator frequency by approximately 3.5× (e.g., 10kHz → 35kHz), which lowers output source resistance and ripple voltage. This allows use of smaller, lower-cost capacitors (e.g., 0.1µF instead of 10µF) while maintaining equivalent load regulation - especially valuable in compact surface-mount designs.
What is the thermal performance of the ICL7660SIPAZ in its PDIP package?
The ICL7660SIPAZ in 8-lead PDIP has a typical junction-to-ambient thermal resistance (θJA) of 110°C/W. At maximum 12V input and 20mA load, power dissipation remains below 250mW, resulting in <28°C junction rise above ambient - well within safe operating limits even at +85°C ambient. No heatsink is required for standard operation.
ICL7660SIPAZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 10kHz ~ 35kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ICL7660SIPAZ FAQ
1.How can I place an order for ICL7660SIPAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660SIPAZ 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 ICL7660SIPAZ reliable?
The price and inventory of ICL7660SIPAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660SIPAZ is usually 5 days.
3.What payment methods are accepted for ICL7660SIPAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660SIPAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660SIPAZ?
ICL7660SIPAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660SIPAZ 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 ICL7660SIPAZ?
For technical support, including ICL7660SIPAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660SIPAZ requirements.
6.How does Aetrix verify that ICL7660SIPAZ is sourced from the original manufacturer or authorized distributors?
All ICL7660SIPAZ 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 ICL7660SIPAZ meets industry standards.
7.What is the process for return or replacement of ICL7660SIPAZ?
All ICL7660SIPAZ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660SIPAZ, 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 ICL7660SIPAZ part is unused and in its original packaging.
Return procedure for ICL7660SIPAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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