MAX8505
PRODUCTION3A, 1MHz, 1% Accurate, Internal Switch Step-Down Regulator with Power-OK
- Part Models
- 2
- 1ku List Price
- Starting From $6.11
Overview
- Saves Space—4.9mm x 6mm Footprint, 1µH Inductor, 47µF Ceramic Output Capacitor
- Input Voltage Range
- 2.6V to 5.5V
- Down to 2.25V with Bias Supply
- 0.8V to 0.85 x VIN, 3A Output
- Ceramic or Polymer Capacitors
- ±1% Output Accuracy over Load, Line, and Temperature
- Fast Transient Response
- Adjustable Soft-Start
- In-Regulation Soft-Start Limits Output-Voltage Dips at Power-On
- POK Monitors Output Voltage
The MAX8505 step-down regulator operates from a 2.6V to 5.5V input and generates an adjustable output voltage from 0.8V to 0.85 x VIN at up to 3A. With a 2.6V to 5.5V bias supply, the input voltage can be as low as 2.25V.
The MAX8505 integrates power MOSFETs and operates at 1MHz/500kHz switching frequency to provide a compact design. Current-mode pulse-width-modulated (PWM) control simplifies compensation with ceramic or polymer output capacitors and provides excellent transient response.
The MAX8505 features 1% accurate output over load, line, and temperature variations. Adjustable soft-start is achieved with an external capacitor. During the soft-start period, the voltage-regulation loop is active. This limits the voltage dip when the active devices, such as microprocessors or ASICs connected to the MAX8505's output, apply a sudden load current step upon passing their undervoltage thresholds.
The MAX8505 features current-limit, short-circuit, and thermal-overload protection and enables a rugged design. Open-drain power-OK (POK) monitors the output voltage.
Applications
- µP/ASIC/DSP/FPGA Core and I/O Supplies
- Chipset Supplies
- Network and Telecom Equipment
- Server, RAID, and Storage Systems
Documentation
Data Sheet 1
Design Note 1
Technical Articles 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX8505EEE+ | QSOP | ||
| MAX8505EEE+T | QSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571B PIN/ERRATA |
||
| MAX8505EEE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Evaluation Kit for the MAX8505
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