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NX9548

Synchronous Buck Regulator

Status: In Production

Features:

  • Adaptive COT Control
  • Adjustable, Constant Switching Frequency up to 1 MHz
  • Extremely Low-RDSON N-MOSFETs
  • Bus Voltage 4.5 V to 24 V
  • Selectable Diode Emulation Mode (PSM Mode)
  • Current Limit, UVLO, OVP
  • Gate Resistor Provision for EMI Reduction
  • -40°C to +85°C Ambient Temperature
  • -40°C to +150°C Junction Temperature
  • RoHS Compliant
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The NX9548 is a synchronous buck switching regulator with 21 mΩ internal N-channel MOSFETs, primarily intended for portable (mobile) applications. The NX9548 operates from 4.5 V to 24 V, and the output voltage range is from 0.75 V to 5 V, with output currents as high as 8 A. It can be selected to operate in synchronous mode, or non-synchronous (diode emulation or PSM) mode at light loads, to improve efficiency. Adaptive constant on time (COT) control provides extremely fast transient response to line and load steps, while at the same time providing near-constant switching frequency over a wide input voltage range. The frequency is also externally adjustable. The NX9548 features overcurrent protection (OCP), feedback under-voltage lockout (FB UVLO), and overvoltage protection (OVP). It also includes an integrated bootstrap Schottky diode and provides lowvoltage (5 V) gate-drive capability. In addition, it provides a Power Good indicator and has adaptive dead time.

Additional Features
  • Adaptive COT Control
  • Adjustable, Constant Switching Frequency up to 1 MHz
  • Extremely Low-RDSON N-MOSFETs
  • Bus Voltage 4.5 V to 24 V
  • Selectable Diode Emulation Mode (PSM Mode)
  • Current Limit, UVLO, OVP
  • Gate Resistor Provision for EMI Reduction
  • -40°C to +85°C Ambient Temperature
  • -40°C to +150°C Junction Temperature
  • RoHS Compliant
Parametrics
Name
Value
# of Outputs
1
Input Voltage Range Min (V)
4.5-24V
Input Voltage Range Max (V)
24
Output Voltage Range Min (V)
0.75V
Output Voltage Range Max (V)
5V
Output Current (mA) max
8
Quiescent Current (mA) typ
1.5mA
Switching Frequency (kHz)
up to 1MHz
Operating Temp Range
-40 to 150
Light Load Efficiency Mode
Y
Automotive Qual
N

Documents

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Data Sheets

  
897KB

Development tools data is currently unavailable.

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Dimension
Solder Composition
JEDEC Indicator
RoHS
China EFUP
NX9548ILQ-TR
0.000000
0.000000
32
VQFN
5x5x1.0mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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