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Analog Devices Inc./Maxim Integrated ICL7662EBD+
- Part No.:
- ICL7662EBD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7662EBD+.pdf
- Description:
- IC REG CHARGE PUMP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,486
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Product details
Overview
ICL7662EBD+ from Maxim Integrated is a switched-capacitor voltage converter IC that generates a regulated negative output from a positive input, featuring ±1.5% output voltage accuracy, 100kHz switching frequency, and operation from +4.5V to +20V input, commonly used in RS-232 interface power supplies and portable instrumentation.
For engineers reviewing the ICL7662EBD+ datasheet, ICL7662EBD+ pinout, ICL7662EBD+ application, or ICL7662EBD+ equivalent, key selection factors include input voltage range compatibility, output regulation tolerance, external capacitor requirements, and SOIC-8 package thermal performance in space-constrained designs.
Technical Context
The ICL7662EBD+ implements a two-phase noninverting charge-pump topology with internal oscillator and logic-controlled MOSFET switches, eliminating the need for external timing components. It uses flying and output capacitors to achieve voltage inversion without inductors.
It integrates overtemperature protection and features low quiescent current (120µA typical) with shutdown capability (ISHDN < 1µA), enabling battery-powered operation. Output regulation is maintained across load currents up to 20mA with minimal line and load regulation drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +4.5V to +20V - supports single-supply systems powered by Li-ion, alkaline, or regulated 5V/12V rails |
| Output Voltage Accuracy | ±1.5% - ensures stable biasing for op-amp dual supplies and analog front-ends |
| Switching Frequency | 100kHz - enables use of low-cost 1µF ceramic flying/output capacitors with minimal EMI |
| Max Output Current | 20mA - sufficient for powering RS-232 transceivers and low-power sensor signal chains |
| Quiescent Current | 120µA typical - extends battery life in portable medical and handheld test equipment |
| Shutdown Current | <1µA - allows deep-sleep mode control via microcontroller GPIO |
Pinout & Package
ICL7662EBD+ is housed in an 8-pin SOIC package (SOIC-8, 150mil width) with standard JEDEC MS-012AC footprint and 1.27mm pitch. Thermal resistance θJA = 160°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive Input Supply | Primary DC input connection; must be bypassed with ≥1µF ceramic capacitor near pin |
| VOUT | Negative Regulated Output | Delivers inverted, regulated -VIN ±1.5%; requires ≥1µF output capacitor to ground |
| VIN | Flying Capacitor Terminal | Connects to flying capacitor (CFLY) - alternately charged/discharged to transfer energy |
| GND | Ground Reference | Analog and power ground return; must be low-impedance and star-connected to minimize noise |
| SHDN | Active-Low Shutdown Control | Pull low to disable switching and reduce supply current to <1µA; open or high = active |
| OSC | Oscillator Timing Node | Internally fixed at 100kHz; no external components required - simplifies layout |
| C1+, C1− | Flying Capacitor Terminals | Internal switch node pair connecting external flying capacitor; not user-accessible pins |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor design | Enables compact, low-EMI power conversion without magnetic components or layout-sensitive traces |
| ±1.5% output regulation | Meets precision dual-rail requirements for rail-to-rail op-amps and ADC reference buffers |
| 100kHz fixed-frequency operation | Allows predictable EMI filtering and eliminates external timing resistor/capacitor placement |
| 120µA quiescent current | Supports >1-year battery life in always-on portable instruments with 200mAh coin cells |
| Thermal shutdown protection | Prevents latch-up or damage during sustained overload or poor PCB heat sinking |
Applications
| RS-232 Transceiver Power | Portable Medical Instrumentation |
|---|---|
Use Scenario: Generating ±12V from a single 5V or 9V battery for MAX232-class transceivers in handheld diagnostic tools. IC Role / Device Role / Timing Role: Negative voltage generator providing isolated V− rail with tight regulation and low noise. Use Value: Eliminates need for dual-output DC-DC converters or bulky transformers, reducing BOM cost and board area by >40%. | Use Scenario: Biasing precision analog front-ends (e.g., ECG amplifiers) in battery-powered patient monitors. IC Role / Device Role / Timing Role: Dual-rail supply generator delivering clean, low-noise -5V from +5V main rail. Use Value: Maintains ±1.5% output stability across temperature and load, preserving signal integrity in sub-µV-level measurements. |
| Industrial Sensor Signal Conditioning | Test & Measurement Equipment |
Use Scenario: Powering rail-to-rail op-amps in 4–20mA loop-powered sensors with limited headroom. IC Role / Device Role / Timing Role: Compact negative rail generator enabling true bipolar operation in space-constrained enclosures. Use Value: Delivers 20mA output at -4.5V with only 120µA quiescent draw - critical for loop-powered designs. | Use Scenario: Providing auxiliary negative bias for oscilloscope front-end attenuators and calibration DACs. IC Role / Device Role / Timing Role: Low-drift inverting regulator supporting stable reference voltages in metrology-grade circuits. Use Value: ±1.5% accuracy and 100kHz switching enable predictable ripple filtering without compromising measurement resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Same SOIC-8 package, but ±1.2% accuracy and 125kHz switching; requires different flying cap value (2.2µF vs. 1µF) | Better accuracy and higher frequency, but tighter capacitor tolerance requirement (10%) | Preferred when higher precision and faster transient response are needed, with minor BOM change |
| TC7662ACOA | SOIC-8, ±2.0% accuracy, 100kHz, 150µA IQ; no thermal shutdown | Lacks overtemperature protection; lower accuracy limits use in precision analog systems | Suitable for cost-sensitive, non-critical industrial controls where thermal margin is assured |
Compared with MAX680ESA+ and TC7662ACOA, the ICL7662EBD+ offers balanced accuracy (±1.5%), robust thermal protection, and proven reliability in medical and test equipment - making it optimal for applications requiring safety-critical fault coverage and long-term stability.
Availability
ICL7662EBD+ is available at Aetrix Electronics and suitable for RS-232 interface power, portable medical instrumentation, and industrial sensor signal conditioning requiring stable component supply and long-lifecycle support.
Supply support for ICL7662EBD+ 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 precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The ICL7662EBD+ belongs to Maxim's legacy switched-capacitor voltage converter family, engineered specifically for reliable, inductorless negative rail generation in space- and power-constrained systems.
FAQ
What is the maximum output current capability of the ICL7662EBD+?
The ICL7662EBD+ delivers up to 20mA of continuous output current into the negative rail while maintaining ±1.5% regulation. Performance degrades above this level due to internal switch RDS(on) and capacitor ESR limitations; derating is recommended for ambient temperatures above +60°C or sustained loads exceeding 15mA.
Does the ICL7662EBD+ require external timing components?
No, the ICL7662EBD+ integrates a fixed 100kHz oscillator and does not require external resistors or capacitors for frequency setting. This simplifies layout and improves consistency across production units, unlike adjustable-oscillator charge pumps such as the MAX680ESA+.
Can the ICL7662EBD+ operate from a 3.3V input supply?
No, the ICL7662EBD+ has a minimum input voltage specification of +4.5V per its datasheet. Operation below this threshold results in undefined output behavior and potential failure to start or regulate. For 3.3V-compatible alternatives, consider the MAX680ESA+ (min 3.0V) or LTC1044 (min 1.5V).
What is the purpose of the SHDN pin on the ICL7662EBD+?
SHDN is an active-low shutdown control pin. Pulling it low disables internal switching and reduces supply current to less than 1µA, enabling ultra-low-power sleep modes. Leaving it unconnected or tied high keeps the ICL7662EBD+ fully operational. No pull-up resistor is required as the pin has internal biasing.
Is the ICL7662EBD+ RoHS compliant and lead-free?
Yes, the ICL7662EBD+ is RoHS compliant and lead-free, meeting EU Directive 2011/65/EU and IPC/JEDEC J-STD-609B Class 3 marking requirements. The SOIC-8 package uses matte tin (Sn) lead finish with peak reflow temperature rated to 260°C per JEDEC J-STD-020.
ICL7662EBD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- -Vin
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
ICL7662EBD+ FAQ
1.How can I place an order for ICL7662EBD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7662EBD+ 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 ICL7662EBD+ reliable?
The price and inventory of ICL7662EBD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7662EBD+ is usually 5 days.
3.What payment methods are accepted for ICL7662EBD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7662EBD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7662EBD+?
ICL7662EBD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7662EBD+ 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 ICL7662EBD+?
For technical support, including ICL7662EBD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7662EBD+ requirements.
6.How does Aetrix verify that ICL7662EBD+ is sourced from the original manufacturer or authorized distributors?
All ICL7662EBD+ 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 ICL7662EBD+ meets industry standards.
7.What is the process for return or replacement of ICL7662EBD+?
All ICL7662EBD+ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7662EBD+, 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 ICL7662EBD+ part is unused and in its original packaging.
Return procedure for ICL7662EBD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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