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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 ZL8802ALAFTK is a dual-channel digital DC/DC controller manufactured by Renesas Electronics. It supports independent dual outputs or combined dual-phase configurations for high-current applications, scalable to 2-, 4-, 6-, and 8-phase operation using up to four devices. The device operates from an input voltage range of 4.5V to 14V and provides output voltages between 0.54V and 5.5V with 1% accuracy. It utilizes ChargeMode control for fast transient response within a single switching cycle and features a proprietary DDC serial bus for inter-IC communication.
Feature Summary
- ChargeMode control enables compensation-free stability and rapid transient response within a single switching cycle.
- Proprietary Digital-DC (DDC) serial bus facilitates complex functions like voltage sequencing and fault spreading.
- Supports flexible multi-phase expansion, allowing two to four controllers to operate in 2-, 4-, 6-, or 8-phase configurations.
Applications
- High-current server power supplies
- Telecommunications infrastructure
- Industrial equipment power systems
Procurement Notes
Verify the specific suffix ALAFTK against official Renesas documentation to confirm package type and moisture sensitivity level. Confirm current lifecycle status as components may be subject to end-of-life notices. Ensure compatibility with existing PCB footprints and thermal management requirements before procurement.
Selection Notes
Select this component when designing systems requiring precise digital control and fast transient response without traditional analog compensation. It is suitable for applications needing scalable phase counts and integrated fault protection features such as overcurrent and UV/OV monitoring via PMBus or DDC interfaces.
Part Context
The ZL8802 belongs to the Intersil/Renesas family of digital power management ICs. It shares architectural similarities with the ZL8800 but offers specific configuration options for dual-channel operations. These controllers are designed to replace complex analog PWM designs with flexible, programmable digital solutions.
Replacement Considerations
Public confirmed substitute part numbers: ZL8800ALAFTK.
