ZL8802ALAFT Equivalent & Substitute Parts

Part Overview

The ZL8802ALAFT is a Buck Regulator Positive Output Step-Down PMBus DC-DC Controller IC manufactured by Renesas Electronics Corporation in the Digital-DC™ series. This 44-QFN (7x7) surface mount device integrates PWM signal output with dual-phase buck topology, supporting PMBus serial interface control with current limit, enable, power good, and tracking features. The part is designated as Last Time Buy, indicating limited availability and the necessity to identify equivalent substitute components for ongoing design requirements and production continuity.

Substiute Parts

ZL8802ALAFT

Renesas Electronics CorporationIn Stock: 855ZL8802ALAFT Datasheet

Current PartRFQ

ZL8800ALAFTK

Renesas Electronics CorporationIn Stock: 788ZL8800ALAFTK Datasheet

Parametric EquivalentRFQ

ZL8800ALBFT7A

Renesas Electronics CorporationIn Stock: 996ZL8800ALBFT7A Datasheet

Parametric EquivalentRFQ

ZL8801ALAFT7A

Renesas Electronics CorporationIn Stock: 1457ZL8801ALAFT7A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ZL8802ALAFT is determined by strict parametric equivalence across the following critical criteria:

• Topology & Function: Buck regulator with step-down positive output configuration
• Output Architecture: Dual-output, dual-phase PWM signal generation
• Supply Voltage Range: 4.5V ~ 14V input compatibility
• Switching Frequency Range: 200kHz ~ 1.33MHz operational bandwidth
• Serial Interface: PMBus protocol support
• Control Features: Current limit, enable, power good, and tracking capabilities
• Package Specification: 44-VFQFN Exposed Pad surface mount form factor
• Thermal & Environmental: -40°C ~ 85°C operating temperature range
• Compliance: ROHS3 compliance and MSL 2 (1 Year) rating

All three substitute parts—ZL8800ALAFTK, ZL8800ALBFT7A, and ZL8801ALAFT7A—meet these parametric requirements identically. Differences exist only in base product number designation, product status, and packaging format (Tape & Reel versus Cut Tape).

Parameter Comparison

Engineering Selection Recommendations

ZL8800ALAFTK is the primary recommended substitute. This part maintains Active product status, ensuring long-term availability and manufacturing support. It is supplied in Tape & Reel format, compatible with standard automated assembly processes. All electrical and thermal specifications are identical to the ZL8802ALAFT.

ZL8800ALBFT7A provides an alternative with equivalent parametric performance but carries Last Time Buy status, indicating limited future availability. Tape & Reel packaging maintains assembly compatibility.

ZL8801ALAFT7A is functionally equivalent but designated as Obsolete. While current inventory is available (1357 Pcs), this part should be considered only for legacy system maintenance or when supply constraints prevent use of active alternatives. Cut Tape packaging may require manual handling or alternative assembly procedures compared to Tape & Reel formats.

All three substitutes maintain ROHS3 compliance and MSL 2 (1 Year) certification, ensuring regulatory and environmental compatibility with the original ZL8802ALAFT specification.

Frequently Asked Questions (FAQ)

Q: Can ZL8800ALAFTK be used as a direct replacement for ZL8802ALAFT in new designs?

A: Yes. ZL8800ALAFTK is parametrically equivalent across all electrical, thermal, and functional specifications. The difference in base product number (ZL8800 versus ZL8802) does not affect circuit operation. ZL8800ALAFTK is recommended for new designs due to its Active product status.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging is supplied on continuous carrier tape suitable for automated pick-and-place assembly equipment. Cut Tape packaging consists of individual components cut from the carrier tape, typically requiring manual handling or alternative assembly processes. Both formats contain identical die and electrical performance.

Q: Why is ZL8801ALAFT7A marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production and support for this part number. While inventory may be available from distributors, future supply cannot be guaranteed. This part should not be selected for new designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. ZL8802ALAFT, ZL8800ALAFTK, ZL8800ALBFT7A, and ZL8801ALAFT7A are all ROHS3 compliant with MSL 2 (1 Year) moisture sensitivity rating.

Q: Can I mix substitute parts in the same production batch?

A: Yes. All substitute parts are parametrically equivalent and will function identically in the same circuit. However, using a single part number per production batch simplifies inventory management and traceability.

Q: What is the significance of PMBus interface compatibility?

A: PMBus is a standardized serial communication protocol for power management devices. All listed parts support identical PMBus functionality, ensuring firmware and software compatibility across substitutions.