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Product Detailed Parameters
- Description：IC REG CTRLR BUCK PMBUS 44QFN
- Series：Digital-DC™
- Mfr：Renesas Electronics Corporation
- Package：Tape & Reel (TR)
- Output Type：PWM Signal
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：2
- Output Phases：2
- Voltage - Supply (Vcc/Vdd)：4.5V ~ 14V
- Frequency - Switching：200kHz ~ 1.33MHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：No
- Clock Sync：Yes
- Serial Interfaces：PMBus
- Control Features：Current Limit, Enable, Power Good, Tracking
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：44-VFQFN Exposed Pad
- Supplier Device Package：44-QFN (7x7)
- Grade：-
- Qualification：-
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Overview
The ZL8802ALAFT7A is a dual-channel digital DC/DC controller utilizing ChargeMode control. It supports output voltages from 0.54V to 5.5V and operates with input voltages between 4.5V and 14V. The device provides 1% output voltage accuracy across line, load, and temperature conditions. Switching frequencies range from 200kHz to 1.33MHz. It enables 2-, 4-, 6-, or 8-phase configurations using up to four devices.
Feature Summary
- ChargeMode control achieves fast transient response within a single switching cycle without requiring external compensation.
- Proprietary single-wire DDC serial bus enables voltage sequencing and fault spreading with other Intersil digital power ICs.
- Comprehensive protection features include inductor peak and averaged over/undercurrent protection and digital fault protection for UV/OV conditions.
Applications
- High current applications requiring independent or dual phase operation
- Systems requiring complex inter-IC phase current balancing
- Designs needing voltage sequencing and fault spreading capabilities
Procurement Notes
Verify the specific suffix 'ALAFT7A' against official Renesas documentation to confirm tape and reel quantity and package details. Ensure compatibility with PMBus interfaces and DDC bus requirements for system integration. Confirm that the operating temperature range and voltage specifications align with the target application environment before finalizing procurement.
Selection Notes
Select this component when designing systems requiring high current density with minimal output capacitance. The ChargeMode technology allows for reduced board space and cost compared to traditional compensated designs. Consider the need for multi-phase scalability and digital monitoring features when evaluating alternative controllers.
Part Context
The ZL8802 is part of the Intersil (now Renesas) digital power portfolio. It serves as a versatile controller for synchronous buck converters. The device integrates nonvolatile memory for storing operating parameters and fault events, enhancing system reliability and diagnostic capabilities.
Replacement Considerations
Consult official Renesas cross-reference guides for verified substitutes. Generic replacements may lack ChargeMode control or DDC bus compatibility.
