ICL7660AIBA Equivalent & Substitute Parts

Part Overview

The ICL7660AIBA is a charge pump switching regulator IC manufactured by Renesas Electronics Corporation, designed for power management applications requiring voltage inversion or doubling. This device generates either negative or positive fixed output voltages (-Vin or 2Vin) from a single positive input supply, with a maximum output current of 45mA. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

ICL7660AIBA

Renesas Electronics CorporationIn Stock: 20615ICL7660AIBA Datasheet

Current PartRFQ

ICL7660AIBAZA

Renesas Electronics CorporationIn Stock: 21700ICL7660AIBAZA Datasheet

DirectRFQ

TC7660EOA

Microchip TechnologyIn Stock: 28139TC7660EOA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ICL7660AIBA is determined by the following critical parameters:

Primary Compatibility Criteria:

• Charge pump topology with positive or negative fixed output configuration
• Single output, fixed voltage generation (-Vin or 2Vin)
• Input voltage range: 1.5V to 12V minimum
• Output current capability: minimum 45mA
• 8-SOIC surface mount package
• Operating temperature range: -40°C to 85°C

Substitute parts are classified into two categories:

Direct Substitutes (Identical Electrical Specifications): Parts that maintain all electrical parameters and output current rating, differing only in product status or packaging format.

Functional Equivalents (Similar Electrical Specifications): Parts that maintain core topology and package but may have reduced output current or modified input voltage limits, suitable for applications with lower current demands.

Parameter Comparison

Engineering Selection Recommendations

ICL7660AIBAZA (Direct Substitute - Recommended for Active Production)

The ICL7660AIBAZA is the primary substitute for the obsolete ICL7660AIBA. Both parts are manufactured by Renesas Electronics and share identical electrical specifications: 45mA output current, 3kHz switching frequency, and -Vin/2Vin output configuration. The ICL7660AIBAZA maintains active product status and is ROHS3 compliant, making it suitable for new designs and ongoing production. The only difference is packaging format (tube vs. standard), which does not affect electrical performance or PCB integration.

TC7660EOA (Functional Equivalent - For Current-Limited Applications)

The TC7660EOA, manufactured by Microchip Technology, is a functional equivalent suitable for applications where output current requirements do not exceed 20mA. This part maintains the same 8-SOIC package, charge pump topology, and output voltage configuration. The TC7660EOA operates at 10kHz switching frequency (compared to 3kHz) and has a maximum input voltage of 10V (compared to 12V). Both the ICL7660AIBAZA and TC7660EOA are ROHS3 compliant and carry identical MSL ratings. Selection between these two depends on specific application current and input voltage requirements.

Frequently Asked Questions (FAQ)

Q: Can ICL7660AIBAZA directly replace ICL7660AIBA without circuit modifications?

A: Yes. The ICL7660AIBAZA is a direct electrical equivalent with identical specifications for input voltage range (1.5V–12V), output current (45mA), switching frequency (3kHz), and output configuration. No circuit modifications are required. The parts are pin-compatible in the 8-SOIC package.

Q: What are the limitations of TC7660EOA as a substitute?

A: The TC7660EOA has two parameter differences: maximum output current is 20mA (versus 45mA) and maximum input voltage is 10V (versus 12V). Use TC7660EOA only in applications where load current does not exceed 20mA and input supply does not exceed 10V. The higher switching frequency (10kHz) may require different capacitor selection for optimal performance.

Q: Are all three parts compatible with the same PCB layout?

A: Yes. All three parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package with identical pinout. PCB layout and footprint remain unchanged across all three parts.

Q: What is the significance of RoHS compliance for these parts?

A: The ICL7660AIBA is RoHS non-compliant, while both ICL7660AIBAZA and TC7660EOA are ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, use ICL7660AIBAZA or TC7660EOA. The obsolete status of ICL7660AIBA further necessitates transition to compliant alternatives.

Q: How does switching frequency affect circuit design?

A: ICL7660AIBA and ICL7660AIBAZA operate at 3kHz, while TC7660EOA operates at 10kHz. Higher switching frequency reduces the size of external capacitors required for charge pump operation but may increase switching noise. Verify capacitor specifications and filtering requirements when substituting TC7660EOA.

Q: Is inventory availability a factor in part selection?

A: Yes. ICL7660AIBAZA has 21,641 units in stock and active product status, ensuring long-term availability. TC7660EOA has 28,039 units available. The original ICL7660AIBA, though 20,600 units are in stock, is obsolete and should not be selected for new designs.