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  ON Semiconductor Electronic Components Datasheet  

NCP1589L Datasheet

Low Voltage Synchronous Buck Controller

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NCP1589L pdf
NCP1589L
Low Voltage Synchronous
Buck Controller with Light
Load Efficiency and
Transient Enhancement
The NCP1589L is a low cost PWM controller designed to operate
from a 5 V or 12 V supply. This device is capable of producing an
output voltage as low as 0.8 V and converting voltage from as low as
2.5 V. It is easy to operate and provides an optimal level of integration
to reduce size and cost of the power supply. It operates in Ramp Pulse
Modulation mode for superior load step and release response. In
addition to fast transient response, it also includes a 1.5 A gate driver
design and light load efficiency features such as adaptive nonoverlap
circuitry and diode emulation. It normally operates at a range of
200500 kHz in continuous current conduction mode, which reduces
with current at light load for further power saving. Protection features
include programmable overcurrent protection, output overvoltage and
undervoltage protection and input undervoltage lockout (UVLO).
Features
VCC Range from 4.5 V to 13.2 V
Adjustable Operating frequency
Boost Pin Operates to 35 V
Ramp Pulse Modulation Control
Precision 0.8 V Internal Reference
Adjustable Output Voltage
Internal 1.5 A Gate Drivers
80% Max Duty Cycle
Input Under Voltage Lockout
Programmable Current Limit
Adaptive Diode Mode Emulation in Light Load
This is a PbFree Device
Applications
Graphics Cards
Desktop Computers
Servers / Networking
DSP & FPGA Power Supply
DCDC Regulator Modules
http://onsemi.com
MARKING
DIAGRAM
DFN10
CASE 485C
1589L
ALYWG
G
1589L
A
L
Y
W
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= PbFree Device
(Note: Microdot may be in either location)
PIN CONNECTIONS
BOOT
LX
UG
LG
GND
1
2
3
4
5
Flag
10 PGOOD
9 VORPM
8 FB
7 COMP/DIS
6 VCC
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
NCP1589LMNTWG DFN10
3000 /
(PbFree) Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2013
August, 2013 Rev. 2
1
Publication Order Number:
NCP1589L/D


  ON Semiconductor Electronic Components Datasheet  

NCP1589L Datasheet

Low Voltage Synchronous Buck Controller

No Preview Available !

NCP1589L pdf
NCP1589L
VCC = 4.5 V 13.2 V
VBST = 4.5 V 15 V
VIN = 2.5 V 19 V
C1
R4 R1
VCC
PGOOD
BOOT
COMP/DIS
R2
C2
UG
LX
FB LG
FLAG GND VORPM
C3
R3 R9 R10
VOUT
GND
Figure 1. Typical Application Diagram
PGOOD 10
VORPM 9
0.8 V
(Vref)
FB 8
+
0.8 V
(Vref)
COMP/DIS 7
PGOOD
MONITOR
OV and UV
±10% of Vref
±25% of Vref
POR
UVLO
6 VCC
FAULT
+
RPMSET
RAMP
COMP VPRM
LATCH
R
PWM Q
OUT
S
FAULT
LX
VORPM
+ VOCP
1 BOOT
3 UG
+
2V
+
2 LX
VCC
4 LG
FAULT
LX
AZCD logic
5 GND
Figure 2. Detailed Block Diagram
http://onsemi.com
2


Part Number NCP1589L
Description Low Voltage Synchronous Buck Controller
Maker ON Semiconductor
Total Page 8 Pages
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