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Analog Devices Inc./Maxim Integrated ICL7660ESA+T
- Part No.:
- ICL7660ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660ESA+T.pdf
- Description:
- IC REG CHARGE PUMP 20MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,479
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Product details
Overview
ICL7660ESA+T from Maxim Integrated is a monolithic CMOS switched-capacitor voltage converter that inverts +5V to -5V with 50Ω typical output resistance, 98% power-conversion efficiency, and 200μA max no-load supply current at 5V - designed for generating negative supplies in op-amp and RS-232E power rails.
For engineers reviewing the ICL7660ESA+T datasheet, ICL7660ESA+T pinout, ICL7660ESA+T application, or ICL7660ESA+T equivalent, this page delivers verified electrical specs, SO-8 package mapping, real-world load behavior (e.g., -4.5V @ 10mA), and validated alternatives for low-power analog supply generation.
Technical Context
The ICL7660ESA+T implements a two-phase charge-pump topology using on-chip MOSFET switches and an internal oscillator (typ. 10kHz at V+=5V) to invert input voltage without external diodes. It operates across 1.5V–10V supply range and supports LV pin grounding for stable operation down to 1.5V.
Its output voltage is unregulated and load-dependent: output resistance (50Ω typ. at 5V/10μF) directly determines voltage drop (e.g., 0.5V at 10mA). Ripple and impedance scale inversely with oscillator frequency and capacitor values - adjustable via OSC pin capacitance or external clocking up to 400kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 10.0V - enables direct use with single-cell Li-ion, 3.3V logic, or 5V systems without pre-regulation. |
| No-Load Supply Current | 200μA max at 5V - ensures ultra-low quiescent power in battery-powered handheld instruments. |
| Output Resistance | 55Ω typ. at +25°C, 100Ω max over full temp range - defines voltage droop under load (e.g., -4.5V at 10mA from +5V). |
| Power Conversion Efficiency | 95% min, 98% typ. at RL=5kΩ - minimizes heat rise and extends battery life in portable telephones and data-acquisition systems. |
| Oscillator Frequency | Typ. 10kHz at V+=5V, 2.7kHz at V+=2V - sets ripple frequency and capacitor sizing; adjustable via OSC pin capacitance or external clock. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded applications including panel meters and EIA/TIA-232E interfaces. |
| Output Short-Circuit Duration | Continuous at V+ ≤ 5.5V - provides inherent robustness against transient faults in op-amp supply rails. |
Pinout & Package
ICL7660ESA+T is housed in an 8-pin SO (Small Outline) package with standard 1.27mm pitch, JEDEC MS-012AC compliant footprint, and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (N.C.) | No Connection | Unused pin; must be left floating - not bonded internally and has no electrical function. |
| 2 (CAP+) | Charge-pump capacitor positive terminal | Connects to + terminal of bucket capacitor C1; critical path for charge transfer timing and EMI control. |
| 3 (GND) | Ground reference | Substrate and signal ground; reservoir capacitor C2 positive terminal ties here in inverter configuration. |
| 4 (CAP-) | Charge-pump capacitor negative terminal | Connects to – terminal of bucket capacitor C1; forms switching node with CAP+ during charge phase. |
| 5 (VOUT) | Negative voltage output | Delivers inverted output (e.g., -5V from +5V); reservoir capacitor C2 negative terminal connects here. |
| 6 (LV) | Low-voltage operation control | Ground for V+ < 3.5V to enable regulator bypass; leave open for V+ > 5V per ICL7660 spec. |
| 7 (OSC) | Oscillator frequency control | Accepts external capacitor (1pF–100pF) to reduce frequency or external HCMOS clock up to 400kHz. |
| 8 (V+) | Positive supply input | Input voltage source (1.5V–10V); also serves as substrate connection - requires local 0.1μF bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage inversion without external diodes | Enables compact, low-BOM-cost -5V generation from +5V logic supply - eliminates Schottky diode losses and layout complexity. |
| 1.5V minimum operating voltage | Supports direct interface with low-voltage microcontrollers and single-cell battery systems without boost pre-regulators. |
| 98% typical power-conversion efficiency | Reduces thermal load in space-constrained handheld instruments and portable telephones where heatsinking is impractical. |
| Adjustable oscillator frequency (1kHz–400kHz) | Allows trade-off between low-noise/low-ripple (high-freq) and ultra-low-quiescent-current (low-freq) operation via OSC pin. |
| SO-8 package with industrial temperature range | Provides surface-mount compatibility, reflow-solderability, and reliability across -40°C to +85°C ambient conditions. |
Applications
| Op-Amp Power Supplies | EIA/TIA-232E Power Supplies |
|---|---|
Use Scenario: Dual-supply op-amps (e.g., TL072, OPA234) require ±5V rails in portable test equipment. IC Role / Device Role / Timing Role: ICL7660ESA+T generates clean -5V rail from existing +5V logic supply using only two 10μF capacitors. Use Value: Eliminates need for isolated DC/DC or dual-output LDO, reducing BOM count and PCB area by >40% vs. inductive solutions. |
Use Scenario: RS-232 transceivers (e.g., MAX232) demand ±5V to drive legacy serial interfaces in industrial gateways. IC Role / Device Role / Timing Role: ICL7660ESA+T provides regulated-negative rail with <50mVpp ripple at 10mA load when paired with low-ESR ceramics. Use Value: Meets EIA/TIA-232E voltage compliance (-3V to -15V) while maintaining <200μA quiescent draw during idle bus states. |
| Handheld Instruments | Panel Meters |
Use Scenario: Battery-powered multimeters and oscilloscope probes require precision analog front-end biasing. IC Role / Device Role / Timing Role: ICL7660ESA+T supplies stable -5V for ADC reference buffers and programmable-gain amplifiers. Use Value: Delivers <0.5% line regulation error over 3.0V–5.5V battery discharge curve, preserving measurement accuracy. |
Use Scenario: Industrial digital panel meters use 4–20mA loops and LCD displays requiring split supplies. IC Role / Device Role / Timing Role: ICL7660ESA+T powers LCD contrast circuitry and op-amp signal conditioning stages from 5V system rail. Use Value: Maintains consistent display contrast and sensor signal integrity across wide temperature (-40°C to +85°C) and load variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1044ESA+ | Includes BOOST pin (raises oscillator freq ×6), higher quiescent current (225μA max), same SO-8 package and -40°C to +85°C rating. | Better suited for audio-band noise-sensitive designs needing lower output impedance and reduced ripple at 10mA loads. | Select MAX1044ESA+ when ripple reduction or higher-frequency operation (>50kHz) is required; otherwise ICL7660ESA+T offers lower IQ. |
| ICL7660CUA+ | μMAX-8 package (3mm × 3mm), identical electrical specs, same -40°C to +85°C rating but different footprint and thermal resistance. | Preferred for ultra-compact portable devices where board area is constrained and thermal dissipation is managed via copper pour. | Choose ICL7660CUA+ only if μMAX footprint is already committed; SO-8 ICL7660ESA+T offers better manufacturability and thermal margin. |
Compared with MAX1044ESA+, the ICL7660ESA+T delivers lower quiescent current and simpler biasing (no BOOST pin), while ICL7660CUA+ trades SO-8 solderability and thermal performance for size - making ICL7660ESA+T optimal for cost-sensitive industrial designs requiring proven assembly yield and thermal headroom.
Availability
ICL7660ESA+T is available at Aetrix Electronics and suitable for op-amp power supplies, EIA/TIA-232E interfaces, and handheld instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ICL7660ESA+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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The ICL7660ESA+T belongs to Maxim's legacy switched-capacitor voltage converter product line, engineered specifically for low-noise, low-quiescent-current DC voltage inversion in space- and power-constrained analog subsystems.
FAQ
What is the maximum output current capability of the ICL7660ESA+T?
The ICL7660ESA+T delivers 10mA continuous output current with a 0.5V output drop at +5V input. At higher loads, voltage droop increases linearly per its 55Ω typical output resistance - e.g., -4.0V at 20mA. For >20mA, consider the MAX660 or cascaded ICL7660ESA+T units.
Does the ICL7660ESA+T require external diodes for operation?
No. The ICL7660ESA+T integrates all necessary MOSFET switches and requires no external diodes across its full 1.5V–10V supply range and -40°C to +85°C temperature range - a key differentiator from earlier charge-pump ICs like the Intersil ICL7660.
How does the LV pin affect ICL7660ESA+T performance?
Grounding the LV pin enables stable operation down to 1.5V input and improves low-voltage efficiency, but increases quiescent current. For V+ > 5V, the LV pin must remain open per ICL7660ESA+T specifications - incorrect LV biasing causes output instability or failure to start.
Can the ICL7660ESA+T generate voltages other than inverted outputs?
Yes. With appropriate external capacitor configurations, the ICL7660ESA+T can double (+2×V+), halve (½×V+), or multiply input voltage - though inversion is its most common and best-characterized mode. Voltage doubling requires Schottky diodes and yields ~2×V+ − 2VD output.
What is the recommended capacitor type and value for ICL7660ESA+T in inverter mode?
Use 10μF ceramic or tantalum capacitors (X5R/X7R dielectric, ≤100mΩ ESR) for both CAP+ and CAP− terminals. Ceramic capacitors minimize size and ESR-related losses; avoid electrolytics due to high ESR and aging effects that degrade ripple and efficiency.
ICL7660ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 10V
- Voltage - Output (Min/Fixed):
- -Vin, nVin, Vin/2
- Voltage - Output (Max):
- -
- Current - Output:
- 20mA
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660ESA+T FAQ
1.How can I place an order for ICL7660ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660ESA+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 ICL7660ESA+T reliable?
The price and inventory of ICL7660ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660ESA+T is usually 5 days.
3.What payment methods are accepted for ICL7660ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660ESA+T?
ICL7660ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660ESA+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 ICL7660ESA+T?
For technical support, including ICL7660ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660ESA+T requirements.
6.How does Aetrix verify that ICL7660ESA+T is sourced from the original manufacturer or authorized distributors?
All ICL7660ESA+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 ICL7660ESA+T meets industry standards.
7.What is the process for return or replacement of ICL7660ESA+T?
All ICL7660ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660ESA+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 ICL7660ESA+T part is unused and in its original packaging.
Return procedure for ICL7660ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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