Design contains obsolete parts

NCP1522BUGEVB: 1.2V @ 600mA, 2.7 ~ 3.3V in, Buck

Summary

The NCP1522B step−down PWM DC−DC converter is optimized for portable applications powered from one cell Li−ion or three cell Alkaline/NiCd/NiMH batteries.

The part is available in adjustable output voltage versions ranging from 0.9 V to 3.3 V. It uses synchronous rectification to increase efficiency and reduce external part count. The device also has a built−in 3.0 MHz (nominal) oscillator which reduces component size by allowing smaller inductors and capacitors. Automatic switching PWM/PFM mode offers improved system efficiency.

Additional features include integrated soft−start, cycle−by−cycle current limiting and thermal shutdown protection. The NCP1522B is available in space saving, low profile TSOP−5 and UDFN−6 packages.

Specifications

Manufacturer onsemi
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Board not Stocked
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 1.2 V
Current Out 600 mA
Voltage In 2.7 ~ 5.5 V
Efficiency @ Conditions >90%, 4V in, 3.3V @ 200 ~ 600 mA
>85%, 4V in, 1.8V @ 10 ~ 400 mA
>78%, 4V in, 0.9V @ 10 ~ 300 mA
Voltage Out Range 0.9 ~ 3.3 V
Features Current Limit (Adj. or Fixed)
Short Circuit Protection
Shutdown, Enable, Standby
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 3 MHz
Standby Current [Typical] 300 nA
Quiescent Current [Typical] 2 µA
Component Count + Extras 9 + 12
Internal Switch Yes
Design Author ONSemiconductor
Application / Target Market Audio: MP3 Players
Cell Phones
Digital Cameras
Portable Devices
USB Powered Devices
Standby Current [Maximum] 1.2 µA
Quiescent Current [Maximum] - Not Given
Main I.C. Base Part NCP1522B
Date Created By Author 2012-04
Date Added To Library 2016-05

Support Documents & Media

NCP1522BUGEVB - User Guide NCP1522 - Datasheet

Media

NCP1522BUGEVB_Schematic_Full.png NCP1522BUGEVB_Board_1_Full.jpg NCP1522BUGEVB_Board_2_Full.jpg NCP1522BUGEVB_Chart_1_Full.png NCP1522BUGEVB_Chart_2_Full.png NCP1522BUGEVB_Chart_3_Full.png