NCP1589 Buck Controller Datasheet

NCP1589 Datasheet, PDF, Equivalent


Part Number

NCP1589

Description

Low Voltage Synchronous Buck Controller

Manufacture

ON Semiconductor

Total Page 11 Pages
Datasheet
Download NCP1589 Datasheet


NCP1589
NCP1588, NCP1589
Low Voltage Synchronous
Buck Controller
The NCP158x 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. This device is capable of converting
voltage from as low as 2.5 V. This 10-pin device provides an optimal
level of integration to reduce size and cost of the power supply.
Features include a 1.5 A gate driver design and an internally set
300ĂkHz oscillator. In addition to the 1.5 A gate drive capability, other
efficiency enhancing features of the gate driver include adaptive
non-overlap circuitry. The NCP158x also incorporates an externally
compensated error amplifier. Protection features include
programmable short circuit protection and undervoltage lockout
(UVLO).
Features
ăVCC Range from 4.5 to 13.2 V
ă300 kHz Internal Oscillator
ăBoost Pin Operates to 26.4 V
ăVoltage Mode PWM Control
ăPrecision 0.8 V Internal Reference
ăAdjustable Output Voltage
ăInternal 1.5 A Gate Drivers
ă80% Max Duty Cycle
ăInput Under Voltage Lockout
ăProgrammable Current Limit
ăThis is a Pb-Free Device
Applications
ăGraphics Cards
ăDesktop Computers
ăServers / Networking
ăDSP & FPGA Power Supply
ăDC-DC Regulator Modules
http://onsemi.com
MARKING DIAGRAMS
DFN10
CASE 485C
158x
ALYWG
G
158x
x
A
L
Y
W
G
= Specific Device Code
= 8 or 9
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb-Free Device
(Note: Microdot may be in either location)
PIN CONNECTIONS
BOOT
LX
UG
LG
GND
1
2
3
4
5
10 PGOOD
9 VOS
8 FB
7 COMP/EN
6 VCC
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
NCP1588MTR2G DFN10 3000/Tape & Reel
(Pb-Free)
NCP1589MNTZG DFN10 3000/Tape & Reel
(Pb-Free)
†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.
©Ă Semiconductor Components Industries, LLC, 2008
January, 2008 - Rev. 4
1
Publication Order Number:
NCP1588/D

NCP1589
NCP1588, NCP1589
VCC = 4.5 V - 13.2 V
VBST = 4.5 V - 15 V
VIN = 2.5 V - 13.2 V
1mF
C1
0.0015mF
R4
3.878kW
R1
4.12kW
VCC
PGOOD
BOOT
R2
17.08kW
C2
0.007mF
C3
0.014mF
R3
74.2W
COMP/EN
UG
LX
FB LG
GND VOS
R9 R10
0.1mF
1500mF
1mH
4.7nF
2x0.22mF
VOUT
1.65 V
2x1800mF
GND
Figure 1. Typical Application Diagram
PGOOD
10
VOS 9
0.8 V
(Vref)
PGOOD
MONITOR
OV and UV
±10% of Vref
±25% of Vref
POR
UVLO
6 VCC
FB 8
-
+
0.8 V
(Vref)
COMP/EN 7
FAULT
+
-
CLOCK
RAMP
OSC
OSC
LATCH
R
PWM Q
OUT
S
FAULT
SOFT
START
+ VOCP
-
1 BOOT
3 UG
+
-
2V
+
-
2 LX
VCC
4 LG
FAULT
5 GND
Figure 2. Detailed Block Diagram
http://onsemi.com
2


Features NCP1588, NCP1589 Low Voltage Synchronou s Buck Controller The NCP158x 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 volt age as low as 0.8 V. This device is cap able of converting voltage from as low as 2.5 V. This 10-pin device provides a n optimal level of integration to reduc e size and cost of the power supply. Fe atures include a 1.5 A gate driver desi gn and an internally set 300ĂkHz oscil lator. In addition to the 1.5 A gate dr ive capability, other efficiency enhanc ing features of the gate driver include adaptive non-overlap circuitry. The NC P158x also incorporates an externally c ompensated error amplifier. Protection features include programmable short cir cuit protection and undervoltage lockou t (UVLO). Features •ăVCC Range from 4.5 to 13.2 V •ă300 kHz Internal Osc illator •ăBoost Pin Operates to 26.4 V •ăVoltage Mode PWM Control •ăP recision 0.8 V Internal Reference •ăAdjustable Output Voltage •ăInternal 1.5 A .
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