NCP1589LMNTWG
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onsemi NCP1589LMNTWG

Manufacturer No:
NCP1589LMNTWG
Manufacturer:
onsemi
Package:
Tape & Reel (TR)
Description:
IC REG CTRLR BUCK 10DFN
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The NCP1589L, produced by onsemi, is a low-cost PWM (Pulse Width Modulation) controller designed for synchronous buck converter applications. It operates from a 5 V or 12 V supply and can produce output voltages as low as 0.8 V, making it versatile for various power supply needs. The device is optimized for high efficiency, especially in light load conditions, and features advanced transient response and protection mechanisms.

Key Specifications

Parameter Min Max Unit
VCC Input Voltage Range 4.5 13.2 V
BOOT Voltage Range 4.5 30 V
Output Voltage Range 0.8 5 V
Operating Frequency Range 200 500 kHz
Gate Driver Current 1.5 A
Maximum Duty Cycle 80 %
Operating Junction Temperature Range 0 150 °C
Operating Ambient Temperature Range 0 95 °C

Key Features

  • Ramp Pulse Modulation Control: Provides superior load step and release response.
  • Precision 0.8 V Internal Reference: Allows for adjustable output voltage.
  • Internal 1.5 A Gate Drivers: Supports high-side and low-side MOSFETs.
  • Light Load Efficiency: Features adaptive non-overlap circuitry and diode emulation.
  • Programmable Overcurrent Protection: Adjustable via an external resistor.
  • Output Overvoltage and Undervoltage Protection: Ensures safe operation by latching faults and disabling the device if necessary.
  • Input Undervoltage Lockout (UVLO): Prevents operation below a safe input voltage threshold.
  • Internal Soft-Start: Reduces inrush current during startup.
  • Power Good Signal: Indicates the status of the converter output voltage.

Applications

  • Graphics Cards
  • Desktop Computers
  • Servers and Networking Equipment
  • DSP & FPGA Power Supply
  • DC-DC Regulator Modules

Q & A

  1. What is the input voltage range for the NCP1589L?

    The input voltage range for the NCP1589L is from 4.5 V to 13.2 V.

  2. What is the minimum output voltage that the NCP1589L can produce?

    The minimum output voltage that the NCP1589L can produce is 0.8 V.

  3. How does the NCP1589L handle overcurrent protection?

    The NCP1589L monitors the voltage across the low-side MOSFET and triggers an overcurrent protection fault if the voltage exceeds a set threshold. This threshold can be adjusted using an external resistor.

  4. What protection mechanisms does the NCP1589L include?

    The NCP1589L includes programmable overcurrent protection, output overvoltage and undervoltage protection, and input undervoltage lockout (UVLO).

  5. How does the NCP1589L manage light load conditions?

    In light load conditions, the NCP1589L operates in discontinuous current mode with a scaled-down frequency to reduce power consumption. It also features adaptive zero current detection to minimize diode conduction period.

  6. What is the purpose of the Power Good (PGOOD) signal?

    The Power Good (PGOOD) signal indicates the status of the converter output voltage, going low during soft-start, overvoltage, or undervoltage faults.

  7. How is the output voltage adjusted in the NCP1589L?

    The output voltage is adjusted using an external resistor divider network connected to the feedback pin, maintaining 0.8 V at the FB pin.

  8. What is the operating frequency range of the NCP1589L?

    The operating frequency range of the NCP1589L is from 200 kHz to 500 kHz in continuous current conduction mode.

  9. Does the NCP1589L have internal soft-start capabilities?

    Yes, the NCP1589L includes an internal soft-start mechanism to prevent excess inrush current during startup.

  10. What is the maximum duty cycle of the NCP1589L?

    The maximum duty cycle of the NCP1589L is 80%.

Product Attributes

Output Type:Transistor Driver
Function:Step-Down
Output Configuration:Positive
Topology:Buck
Number of Outputs:1
Output Phases:1
Voltage - Supply (Vcc/Vdd):4.5V ~ 13.2V
Frequency - Switching:- 
Duty Cycle (Max):83%
Synchronous Rectifier:Yes
Clock Sync:No
Serial Interfaces:- 
Control Features:Enable, Power Good
Operating Temperature:0°C ~ 95°C (TA)
Mounting Type:Surface Mount
Package / Case:10-VFDFN Exposed Pad
Supplier Device Package:10-DFN (3x3)
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In Stock

$0.37
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Similar Products

Part Number NCP1589LMNTWG NCP1589MNTWG NCP1589AMNTWG NCP1589BMNTWG NCP1589CMNTWG NCP1589DMNTWG
Manufacturer onsemi onsemi onsemi onsemi onsemi onsemi
Product Status Active Obsolete Active Obsolete Active Active
Output Type Transistor Driver Transistor Driver Transistor Driver Transistor Driver Transistor Driver Transistor Driver
Function Step-Down Step-Down Step-Down Step-Down Step-Down Step-Down
Output Configuration Positive Positive Positive Positive Positive Positive
Topology Buck Buck Buck Buck Buck Buck
Number of Outputs 1 1 1 1 1 1
Output Phases 1 1 1 1 1 1
Voltage - Supply (Vcc/Vdd) 4.5V ~ 13.2V 4.5V ~ 13.2V 4.5V ~ 13.2V 4.5V ~ 13.2V 4.5V ~ 13.2V 4.5V ~ 13.2V
Frequency - Switching - 300kHz 300kHz 600kHz 300kHz -
Duty Cycle (Max) 83% 75% 75% 75% 75% 83%
Synchronous Rectifier Yes Yes Yes Yes Yes Yes
Clock Sync No No No No No No
Serial Interfaces - - - - - -
Control Features Enable, Power Good Enable, Power Good Enable, Power Good Enable, Power Good Enable, Power Good Enable, Power Good
Operating Temperature 0°C ~ 95°C (TA) -40°C ~ 85°C (TA) 0°C ~ 70°C (TA) 0°C ~ 70°C (TA) -20°C ~ 70°C (TA) 0°C ~ 95°C (TA)
Mounting Type Surface Mount Surface Mount, Wettable Flank Surface Mount, Wettable Flank Surface Mount, Wettable Flank Surface Mount, Wettable Flank Surface Mount, Wettable Flank
Package / Case 10-VFDFN Exposed Pad 10-VFDFN Exposed Pad 10-VFDFN Exposed Pad 10-VFDFN Exposed Pad 10-VFDFN Exposed Pad 10-VFDFN Exposed Pad
Supplier Device Package 10-DFN (3x3) 10-DFN (3x3) 10-DFN (3x3) 10-DFN (3x3) 10-DFN (3x3) 10-DFN (3x3)

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