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Analog Devices Inc./Maxim Integrated ICL7660C/D
- Part No.:
- ICL7660C/D
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- Die
- Datasheet:
-
ICL7660C/D.pdf
- Description:
- IC REG CHARGE PUMP 20MA DIE
- Quantity:
- Payment:
- Shipping:
Inventory:2,872
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Product details
Overview
ICL7660C/D from Maxim Integrated is a monolithic CMOS switched-capacitor voltage converter designed for inverting +5V logic supplies to generate regulated -5V analog rails. It operates from 1.5V to 10V input, delivers 10mA output with ≤0.5V drop at 5V input, and achieves 98% typical power-conversion efficiency. Its pin-compatible replacement for industry-standard ICL7660 enables compact op-amp power supply design in handheld instruments.
For engineers reviewing the ICL7660C/D datasheet, ICL7660C/D pinout, ICL7660C/D application, or ICL7660C/D equivalent, key selection criteria include guaranteed 1.5–10V operation without external diodes, no-load supply current ≤200μA at 5V, oscillator frequency of ~10kHz (typ), 55Ω typical output resistance at 25°C, and compatibility with μMAX, SO, DIP, and TO-99 packages across commercial temperature range (0°C to +70°C).
Technical Context
The ICL7660C/D implements a two-phase charge-pump architecture using on-chip MOSFET switches and an internal oscillator to invert input voltage without inductors. It synthesizes an equivalent output resistance inversely proportional to oscillator frequency and capacitor value (REQ ≈ 1/(fOSC × C1)).
Unlike the MAX1044 variant, the ICL7660C/D lacks a BOOST pin and has NC on Pin 1; its oscillator frequency is fixed at ~10kHz (typ) with no user-adjustable boost function. The LV pin must remain open for V+ > 5V and is unused for standard operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 10.0V - supports direct use from single-cell Li-ion (3.0V) up to 9V battery rails without external regulation. |
| No-Load Supply Current | ≤200μA at 5V - enables ultra-low quiescent power in always-on portable instrumentation. |
| Oscillator Frequency | ~10kHz (typ) - sets base switching frequency; determines output ripple, impedance, and minimum capacitor sizing. |
| Output Resistance | 55Ω (typ) at 25°C - defines load regulation: e.g., 10mA load causes ~0.55V drop from ideal -5V. |
| Power Conversion Efficiency | 95–98% (typ) - minimizes thermal rise and extends battery life in low-power analog subsystems. |
| Output Current Capability | 10mA at ≤0.5V drop - sufficient for biasing dual op-amps, RS-232 transceivers, or sensor signal conditioning ICs. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded systems and consumer electronics. |
Pinout & Package
Dice form factor (ICL7660C/D) - bare die intended for hybrid module integration or custom packaging; no leadframe or molded body. Requires wire bonding to substrate with standard 8-pin layout matching plastic DIP/SO/μMAX footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No connection - must be left floating; not bonded or used in ICL7660C/D die. |
| 2 | CAP+ | Positive terminal of charge-pump capacitor C1 - connects to V+ during phase 1 to charge C1. |
| 3 | GND | Circuit ground reference - substrate connection and reservoir capacitor positive terminal anchor point. |
| 4 | CAP- | Negative terminal of charge-pump capacitor C1 - connects to VOUT during phase 2 to transfer charge. |
| 5 | VOUT | Negative output voltage node - delivers inverted voltage (e.g., -5V from +5V); connects to reservoir capacitor negative terminal. |
| 6 | LV | Low-voltage enable - must be left open for V+ > 5V; irrelevant for standard 5V operation. |
| 7 | OSC | Oscillator control - internal timing node; leave open for nominal 10kHz operation; sensitive to stray capacitance. |
| 8 | V+ | Positive supply input - also serves as substrate connection; absolute max 10.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting voltage conversion | Generates precise negative rail (e.g., -5V) from single positive source without inductors or external diodes. |
| Wide input voltage range | Operates down to 1.5V - enables direct use with alkaline or NiMH cells without pre-regulation. |
| High power-conversion efficiency | 98% typical efficiency reduces heat generation and extends battery runtime in portable designs. |
| No external diode required | On-chip MOSFET switches eliminate need for discrete diodes - simplifies BOM and improves reliability. |
| PIN-compatible with legacy ICL7660 | Direct drop-in replacement for existing designs using Intersil or Renesas ICL7660 variants. |
Applications
| Op-Amp Power Supplies | EIA/TIA-232E Power Supplies |
|---|---|
Use Scenario: Dual-supply operational amplifiers in portable data loggers require symmetric ±5V rails from a single 5V USB source. IC Role / Device Role / Timing Role: ICL7660C/D generates the -5V rail via charge-pump inversion while the +5V rail is sourced directly from USB. Use Value: Eliminates need for bulky inductive DC/DC converters; maintains <10mA output capability with <0.5V regulation error under full load. | Use Scenario: RS-232 line drivers in handheld test equipment must generate ±12V from a 3.3V microcontroller supply. IC Role / Device Role / Timing Role: ICL7660C/D provides the negative voltage rail (-12V) in a multi-stage charge-pump chain, paired with a voltage doubler stage. Use Value: Achieves EIA/TIA-232E-compliant voltage levels using only ceramic capacitors and no magnetics. |
| Handheld Instruments | Panel Meters |
Use Scenario: Battery-powered multimeters require isolated analog supply rails to prevent digital noise coupling into measurement circuits. IC Role / Device Role / Timing Role: ICL7660C/D isolates the analog front-end by generating clean -5V from the main 9V battery, decoupled via local 0.1μF bypass. Use Value: Delivers 98% efficiency and <200μA quiescent current - critical for multi-year battery life in low-duty-cycle instruments. | Use Scenario: Industrial panel meters with LCD displays and analog inputs need stable ±5V for signal conditioning and display bias. IC Role / Device Role / Timing Role: ICL7660C/D supplies the negative rail to precision ADC references and op-amp buffers, operating from a 5V system rail. Use Value: Maintains 55Ω output resistance and <10mVpp ripple at 1kHz - ensures reference stability within 0.1% accuracy limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660CSA | Same die, SO-8 package with gull-wing leads - includes bond wires and molded body; ICL7660C/D is bare die. | SO-8 version requires PCB footprint and reflow assembly; dice version enables hermetic hybrid modules or chip-on-board integration. | Select ICL7660CSA for standard SMT production; choose ICL7660C/D only when custom packaging, thermal optimization, or space-constrained hybrid assembly is required. |
| MAX1044CPA | Includes BOOST pin (Pin 1) enabling 6× oscillator frequency increase; higher quiescent current (≤80μA vs. ≤200μA) at 5V. | Enables lower-output-impedance operation and reduced capacitor size; unsuitable where strict ICL7660 pinout compliance is mandatory. | Choose MAX1044CPA if audio-band noise reduction or <50Ω output resistance is needed; retain ICL7660C/D for legacy pinout fidelity and minimal quiescent current. |
Compared with ICL7660CSA, the ICL7660C/D offers identical electrical performance but requires custom die attach and wire bonding, while MAX1044CPA trades pin compatibility for higher-frequency operation and improved dynamic response - making ICL7660C/D optimal for cost-sensitive, space-constrained commercial instrumentation where legacy footprint alignment is essential.
Availability
ICL7660C/D is available at Aetrix Electronics and suitable for handheld instruments, panel meters, and RS-232 interface circuits requiring stable component supply with long-term commercial-temperature support.
Supply support for ICL7660C/D 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
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for power management, sensing, and communication applications.
The ICL7660 product line delivers compact, inductorless voltage inversion for low-power analog subsystems - targeting portable instrumentation, industrial interfaces, and space-constrained embedded systems.
FAQ
What is the maximum input voltage rating for the ICL7660C/D?
The ICL7660C/D has an absolute maximum supply voltage rating of 10.5V between V+ and GND. Operation is specified over 1.5V to 10.0V, with guaranteed performance across the full commercial temperature range (0°C to +70°C). Exceeding 10.5V risks permanent damage per Absolute Maximum Ratings.
Does the ICL7660C/D require external diodes for operation?
No, the ICL7660C/D does not require external diodes. Its on-chip CMOS power MOSFET switches replace discrete diodes, enabling full 1.5V–10V operation without external components. This eliminates forward-voltage drop and thermal concerns associated with Schottky diodes in traditional charge-pump designs.
What is the function of Pin 6 (LV) on the ICL7660C/D?
Pin 6 (LV) on the ICL7660C/D is the Low-Voltage Enable input. For V+ > 5V, it must be left open; connecting it to GND is unnecessary and may degrade efficiency. Unlike the MAX1044, the ICL7660C/D does not use LV for oscillator control or low-voltage optimization.
Can the ICL7660C/D generate voltages other than inverted outputs?
Yes, the ICL7660C/D supports multiple configurations: inversion (VOUT = –V+), voltage doubling (VOUT = 2×V+ – 2×VD), and voltage division (VOUT = V+/2), using different external capacitor topologies. All modes rely on the same internal charge-pump core and require no additional ICs or control signals.
What package form does the ICL7660C/D ship in?
The ICL7660C/D is supplied as bare die (dice) in wafer form, intended for hybrid module integration, chip-on-board assembly, or custom packaging. It matches the 8-pin layout of DIP, SO, μMAX, and TO-99 packages but lacks leads, molding compound, or bond wires - requiring wire bonding to substrate.
ICL7660C/D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tube
- 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, nVin, Vin/2
- Voltage - Output (Max):
- -
- Current - Output:
- 20mA
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
ICL7660C/D FAQ
1.How can I place an order for ICL7660C/D through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660C/D 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 ICL7660C/D reliable?
The price and inventory of ICL7660C/D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660C/D is usually 5 days.
3.What payment methods are accepted for ICL7660C/D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660C/D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660C/D?
ICL7660C/D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660C/D 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 ICL7660C/D?
For technical support, including ICL7660C/D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660C/D requirements.
6.How does Aetrix verify that ICL7660C/D is sourced from the original manufacturer or authorized distributors?
All ICL7660C/D 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 ICL7660C/D meets industry standards.
7.What is the process for return or replacement of ICL7660C/D?
All ICL7660C/D units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660C/D, 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 ICL7660C/D part is unused and in its original packaging.
Return procedure for ICL7660C/D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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