ICL7660CSA Charge Pump Switching Regulator IC Equivalent & Substitute Parts

Part Overview

The ICL7660CSA is a charge pump switching regulator IC manufactured by Analog Devices Inc./Maxim Integrated, designed for power management applications requiring voltage inversion or multiplication. This 8-SOIC surface mount device generates positive or negative fixed output voltages (-Vin, nVin, or Vin/2) from a single 1.5V to 10V input supply, delivering up to 20mA output current at a 10kHz switching frequency.

The ICL7660CSA is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing status and current compliance certifications.

Substiute Parts

ICL7660CSA

Analog Devices Inc./Maxim IntegratedIn Stock: 9571ICL7660CSA Datasheet

Current PartRFQ

ICL7660CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1386ICL7660CSA+ Datasheet

DirectRFQ

TC7660COA

Microchip TechnologyIn Stock: 16818TC7660COA Datasheet

DirectRFQ

ICL7660CBAZ

Renesas Electronics CorporationIn Stock: 1754ICL7660CBAZ Datasheet

MFR RecommendedRFQ

ICL7660CBAZ-T

Renesas Electronics CorporationIn Stock: 30358ICL7660CBAZ-T Datasheet

MFR RecommendedRFQ

ICL7660CBAZA

Renesas Electronics CorporationIn Stock: 1128ICL7660CBAZA Datasheet

MFR RecommendedRFQ

ICL7660CBAZA-T

Renesas Electronics CorporationIn Stock: 7236ICL7660CBAZA-T Datasheet

MFR RecommendedRFQ

LMC7660IM/NOPB

Texas InstrumentsIn Stock: 366686LMC7660IM/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ICL7660CSA is determined by the following critical parameters:

• Package / Case: 8-SOIC (0.154", 3.90mm Width) — mechanical and electrical compatibility requirement
• Mounting Type: Surface Mount — assembly process compatibility
• Topology: Charge Pump — functional architecture requirement
• Voltage - Input Range: 1.5V to 10V — power supply compatibility
• Frequency - Switching: 10kHz — operational frequency alignment
• Synchronous Rectifier: No — internal circuit architecture
• Moisture Sensitivity Level (MSL): 1 (Unlimited) — storage and handling compatibility

Substitute parts are grouped into two categories:

Category 1: Direct Electrical Equivalents (20mA Output Current) Parts with identical output current rating (20mA) and matching output voltage configurations. These provide one-to-one functional replacement with no design modifications required.

Category 2: Enhanced Performance Substitutes (45mA Output Current) Parts with increased output current capability (45mA) while maintaining all other critical parameters. These provide functional replacement with improved current delivery capacity, suitable for applications requiring higher load current within the same voltage and frequency specifications.

Category 3: Functional Substitutes (Negative Output Only) Parts with restricted output configuration (negative output only, -Vin) and unspecified output current. These provide functional replacement for applications requiring only negative voltage inversion.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (20mA Output Current Requirement)

ICL7660CSA+ is the primary direct substitute. It maintains identical electrical specifications (20mA output current, -Vin/nVin/Vin/2 output configuration) and identical package form factor. The part is manufactured by the same original manufacturer (Analog Devices Inc./Maxim Integrated) and holds active product status with ROHS3 compliance, addressing the RoHS non-compliance limitation of the obsolete ICL7660CSA.

TC7660COA from Microchip Technology provides an alternative direct substitute with 20mA output current. Output voltage configuration differs slightly (-Vin, 2Vin instead of -Vin, nVin, Vin/2), which may affect applications requiring Vin/2 output. The part is active and ROHS3 compliant.

For Enhanced Performance (45mA Output Current Requirement)

ICL7660CBAZ, ICL7660CBAZ-T, ICL7660CBAZA, and ICL7660CBAZA-T are manufacturer-recommended substitutes offering increased output current (45mA) while maintaining all other critical parameters. These parts are manufactured by Renesas Electronics Corporation and hold active product status with ROHS3 compliance. Output voltage configuration is -Vin, 2Vin. Selection between these variants depends on packaging requirements: tube packaging (ICL7660CBAZ, ICL7660CBAZA) or cut tape with Digi-Reel (ICL7660CBAZ-T, ICL7660CBAZA-T).

For Negative Output Only Applications

LMC7660IM/NOPB from Texas Instruments provides functional substitution for applications requiring only negative voltage inversion (-Vin output). This part is active and ROHS3 compliant. Output current specification is not provided in available documentation. This substitute is suitable only when positive or multiplied output configurations are not required.

Frequently Asked Questions (FAQ)

Q: Can ICL7660CSA+ be used as a direct replacement for ICL7660CSA without circuit modifications?

A: Yes. ICL7660CSA+ maintains identical electrical specifications (1.5V to 10V input, 20mA output current, -Vin/nVin/Vin/2 output configuration, 10kHz switching frequency) and identical 8-SOIC package form factor. No circuit modifications are required. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between ICL7660CBAZ and ICL7660CBAZ-T?

A: Both parts are electrically identical with 45mA output current and -Vin, 2Vin output configuration. The difference is packaging format: ICL7660CBAZ is supplied in tube packaging, while ICL7660CBAZ-T is supplied in cut tape with Digi-Reel. Selection depends on assembly process requirements and tape reel compatibility with pick-and-place equipment.

Q: Can TC7660COA replace ICL7660CSA in all applications?

A: TC7660COA provides functional substitution with identical 20mA output current and 8-SOIC package. However, output voltage configuration differs: TC7660COA provides -Vin and 2Vin outputs, while ICL7660CSA provides -Vin, nVin, and Vin/2 outputs. Applications requiring Vin/2 output cannot use TC7660COA without circuit redesign.

Q: Why do the ICL7660CBAZ variants have higher output current (45mA) than the original ICL7660CSA (20mA)?

A: The ICL7660CBAZ series represents an enhanced version of the ICL7660 base product with improved current delivery capability. Higher output current allows the same device to support higher load currents while maintaining all other operational parameters. This is a performance enhancement, not a limitation.

Q: Is LMC7660IM/NOPB suitable for applications requiring both positive and negative outputs?

A: No. LMC7660IM/NOPB provides only negative output (-Vin). Applications requiring positive, multiplied, or divided output voltages must use ICL7660CSA+, TC7660COA, or the ICL7660CBAZ variants, which support multiple output configurations.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (ICL7660CSA+, TC7660COA, ICL7660CBAZ, ICL7660CBAZ-T, ICL7660CBAZA, ICL7660CBAZA-T, LMC7660IM/NOPB) hold ROHS3 compliance status. The original ICL7660CSA is RoHS non-compliant, making substitution necessary for applications requiring RoHS compliance.

Q: What is the moisture sensitivity level for all parts?

A: All parts, including the original ICL7660CSA and all substitutes, have Moisture Sensitivity Level (MSL) 1 (Unlimited). This indicates no moisture sensitivity restrictions for storage, handling, or assembly processes.