ADP322ACPZ-155 Analog Devices Integrated Circuit (Other) In Stock
ADP322ACPZ-155 is a step-down DC/DC switching controller from Analog Devices with a fixed 1.55 V output voltage. It drives an external N-channel MOSFET to regulate high-current rails in communications and computing applications. Available in a compact LFCSP package for space-constrained power supply designs.
- Manufacturer
- Analog Devices
- Package
- Other
- Pin Count
- 17
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ADP322ACPZ-155?
- Fixed 1.55 V output step-down controller drives external N-channel MOSFET for high-current, low-voltage rail regulation in ASIC and processor power supplies
- Analog Devices controller architecture provides accurate output voltage regulation and fast load-transient response critical for dynamic processor power demands
- Compact LFCSP package minimizes PCB footprint while supporting high switching frequencies that reduce external inductor and capacitor size
What is ADP322ACPZ-155 used for?
ADP322ACPZ-155 targets core voltage regulation for ASICs, FPGAs, and network processors in communications infrastructure equipment that require a tightly regulated 1.55 V rail at multi-ampere load currents. It suits server motherboards and line cards where an external power MOSFET handles high current delivery and the controller provides precise voltage accuracy and protection. The device is also used in wireless base stations and storage subsystems that demand high-efficiency point-of-load conversion from a 3.3 V or 5 V intermediate bus.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for ADP322ACPZ-155?
Compatible alternatives and drop-in replacements for ADP322ACPZ-155:
Frequently Asked Questions
What output voltage does ADP322ACPZ-155 regulate to, and how is that set?
ADP322ACPZ-155 is configured for a fixed 1.55 V output voltage as indicated by the -155 suffix. Unlike adjustable versions that require an external resistor divider, the fixed output eliminates the voltage-setting components, reducing component count by 2 resistors and ensuring the correct 1.55 V core supply for compatible ASICs and FPGAs without a divider design step.
Why does ADP322ACPZ-155 use an external MOSFET rather than an integrated switch?
ADP322ACPZ-155 is a controller that drives an external N-channel MOSFET gate, allowing the designer to select a MOSFET sized for the actual load current, which may be 5 A, 10 A, or higher. An integrated-switch regulator is limited to the on-chip FET current rating, whereas the controller topology scales to multi-ampere loads with just a MOSFET swap, making it suitable for server and base-station power rails above 5 A.
Which high-current load applications are well matched to ADP322ACPZ-155?
ADP322ACPZ-155 suits point-of-load converters powering FPGA core rails at 1.55 V with load currents from 3 A to 20 A, ASIC core supplies in networking switch chips, and DDR memory termination supplies in high-density server blades. These applications demand tight 1% or better output voltage accuracy across fast load steps, which the ADP322 controller architecture supports with its fast PWM response.
What input voltage range is compatible with ADP322ACPZ-155 in a typical server board design?
Step-down controllers in the ADP322 family are designed to accept input voltages typically in the 3 V to 5.5 V range, compatible with 3.3 V and 5 V intermediate power bus voltages commonly distributed on server motherboards and telecom line cards. This input range allows the controller to step down efficiently to the 1.55 V output with a duty cycle of roughly 28% to 47%, keeping switching losses moderate at high frequencies.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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