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Product Detailed Parameters
- Description：IC REG CTRLR BUCK PMBUS 44QFN
- Series：-
- 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
- Mounting Type：Surface Mount
- Package / Case：44-VFQFN Exposed Pad
- Supplier Device Package：44-QFN (7x7)
- Grade：-
- Qualification：-
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Overview
The ZL8802 is a dual output or dual phase digital DC/DC controller manufactured by Renesas Electronics. It supports independent operation of each output or combined dual-phase configuration for high current applications, accommodating 2-, 4-, 6-, and 8-phase operations with up to four controllers. The device operates from input voltages between 4.5V and 14V, supporting output voltages from 0.54V to 5.5V. It features proprietary single-wire Digital-DC serial bus communication for voltage sequencing and fault spreading.
Feature Summary
- Proprietary single-wire Digital-DC serial bus enables voltage sequencing and fault spreading with other digital power ICs
- Fully digital ChargeMode control responds to transient load steps within a single switching cycle without compensation
- Accurate average output current measurement with adjustable gain settings for sensing with SPS current monitor outputs or low DCR inductors
- Monitor ADC measures input voltage, input current, output voltage, driver voltage, and internal and external temperature
Applications
- High current applications requiring multiple phases
- Systems needing complex power supply management via inter-IC phase current balancing
- Applications requiring voltage sequencing and fault spreading among digital power ICs
Procurement Notes
Verify the specific suffix ALAFTR5959 against official Renesas documentation to confirm exact packaging, tape-and-reel specifications, and environmental compliance status. Ensure compatibility with existing board designs regarding the Digital-DC interface requirements and thermal management for high-current configurations.
Selection Notes
Select this component when designing systems that require flexible multi-phase configurations up to eight phases using multiple controllers. It is suitable for applications demanding fast transient response with minimal output capacitance and precise current monitoring capabilities integrated into a digital control loop.
Part Context
The ZL8802 belongs to the family of digital DC/DC controllers designed to eliminate complicated power supply managers with numerous external discrete components. It utilizes a unique compensation-free modulation technique to meet transient specifications efficiently while providing comprehensive protection features including overcurrent, undervoltage, and overvoltage protection.
Replacement Considerations
The ZL8801 is a related dual phase PMBus ChargeMode Control DC/DC Digital Controller. Verify functional equivalence and interface compatibility before substitution.
