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onsemi NCP1521BSNT1GRoHS

Manufacturer
onsemi
MPN
NCP1521BSNT1G
LCSC Part #
C128368
Packaging
TSOP-5
Customer #
Key Attributes
High-Efficiency, Low Ripple, Adjustable Output Voltage Step-Down DC-DC Converter
Datasheetpdf icononsemi NCP1521BSNT1G
In-Stock: 57
57 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 1.3678$ 1.37
10+$ 1.1355$ 11.36
30+$ 1.0081$ 30.24
100+$ 0.8646$ 86.46
500+$ 0.8017$ 400.85
1,000+$ 0.7726$ 772.60
Standard Packaging3000/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators
Manufactureronsemi
PackagingTSOP-5
Operating Temperature-40℃~+85℃
Frequency - Switching1.5MHz
FunctionStep-down type
Number of Outputs1
FeaturesCycle-by-cycle current limiting;Light load efficient mode;Overcurrent Protection
Output TypeAdjustable
TopologyBuck
Operating Voltage2.7V~5.5V
Switch tube (built-in/external)Built-in
Output Voltage900mV~3.9V
Output Current600mA
Quiescent Current45uA
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging3000
Sales UnitPiece

Introduction

AI Translation

The NCP1521B step−down DC−DC converter is a monolithic integrated circuit optimized for portable applications powered from one cell Li−Ion or three cell Alkaline/NiCd/NiMH batteries. The part, available in adjustable output voltage versions ranging from 0.9 V to 3.9 V, is able to deliver up to 600 mA. It uses synchronous rectification to increase efficiency and reduce external part count. The device also has a built−in 1.5 MHz (nominal) oscillator which reduces component size by allowing smaller inductors and capacitors. Automatic switching PWM/PFM mode offers improved system efficiency. The NCP1521B uses a constant frequency, current mode step−down architecture. Both the main (P−Channel MOSFET) and synchronous (N−Channel MOSFET) switches are internal. It delivers a constant voltage from either a single Li−Ion or three cell NiMH/NiCd battery to portable devices such as cell phones and PDA. The output voltage is set by an external resistor divider. The NCP1521B sources at least 600 mA, depending on external components chosen. The NCP1521B works with two modes of operation; PWM/PFM depending on the current required. In PWM mode, the device can supply voltage with a tolerance of ± 3% and 90% efficiency or better. Lighter load currents cause the device to automatically switch into PFM mode for reduced current consumption and extended battery life. Additional features include soft−start, undervoltage protection, current overload protection, and thermal shutdown protection. Only six external components are required. The part uses an internal reference voltage of 0.6 V. It is recommended to keep the part in shutdown mode until the input voltage is 2.7 V or higher.

Features

AI Translation
  • Up to 96% Efficiency
  • Best−In−Class Ripple, including PFM Mode
  • Sources up to 600 mA
  • 1.5 MHz Switching Frequency
  • Adjustable Output Voltage from 0.9 V to 3.9 V
  • Synchronous Rectification for Higher Efficiency
  • 2.7 V to 5.5 V Input Voltage Range
  • Low Quiescent Current
  • Shutdown Current Consumption of 0.3 μA
  • Thermal Limit Protection
  • Short Circuit Protection
  • All Pins are Fully ESD Protected
  • This is a Pb−Free Device

Applications

AI Translation
  • Cellular Phones, Smart Phones and PDAs
  • Digital Still/Video Cameras
  • MP3 Players and Portable Audio Systems
  • Wireless and DSL Modems
  • Portable Equipment
  • USB Powered Devices