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NCP1589B 데이터시트 PDF




ON Semiconductor에서 제조한 전자 부품 NCP1589B은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 NCP1589B 자료 제공

부품번호 NCP1589B 기능
기능 Low Voltage Synchronous Buck Controller
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NCP1589B 데이터시트, 핀배열, 회로
NCP1589A, NCP1589B
Low Voltage Synchronous
Buck Controller
The NCP1589A/B 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
300 kHz or 600 kHz 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 NCP1589A/B also
incorporates an externally compensated error amplifier. Protection
features include programmable short circuit protection and
undervoltage lockout (UVLO).
Features
VCC Range from 4.5 V to 13.2 V
300 kHz and 600 kHz Internal Oscillator
Boost Pin Operates to 30 V
Voltage Mode PWM 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
This is a Pb−Free Device
Applications
Graphics Cards
Desktop Computers
Servers / Networking
DSP & FPGA Power Supply
DC−DC Regulator Modules
www.onsemi.com
MARKING DIAGRAM
DFN10
CASE 485C
1589x
ALYWG
G
1589x
A
L
Y
W
G
= Specific Device Code
x = A or B
= 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
NCP1589AMNTWG
NCP1589BMNTWG DFN10
NCP1589AMNTXG (Pb−Free)
3000 /
Tape & Reel
NCP1589BMNTXG
†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, 2015
December, 2015 − Rev. 1
1
Publication Order Number:
NCP1589A/D




NCP1589B pdf, 반도체, 판매, 대치품
NCP1589A, NCP1589B
ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 4.5 V < [BST−PHASE] < 13.2 V, 4.5 V < BST < 30 V, 0 V < PHASE < 21 V,
CTG = CBG = 1.0 nF, for min/max values unless otherwise noted.)
Characteristic
Conditions
Min Typ Max Unit
VCC Voltage Range
4.5 13.2 V
Boost Voltage Range
Supply Current
13.2 V wrt LX
4.5
30 V
Quiescent Supply Current (NCP1589A)
Boost Quiescent Current
Undervoltage Lockout
VFB = 1.0 V, No Switching, VCC = 13.2 V
VFB = 1.0 V, No Switching
1.0
0.1
8.0 mA
mA
UVLO Threshold
UVLO Threshold
UVLO Hysteresis
Switching Regulator
VCC Rising
VCC Falling
VCC Rising or VCC Falling
3.8 4.0 4.2 V
3.4 3.6 3.8 V
0.4 V
VFB Feedback Voltage
(FB Tied to Comp. Measure FB Pin.)
0.7936
0.8
0.8064
V
Oscillator Frequency (NCP1589A)
270 300 330 kHz
Oscillator Frequency (NCP1589B)
540 600 660 kHz
Ramp−Amplitude Voltage
1.1 V
Minimum Duty Cycle
0%
Maximum Duty Cycle
70 75 80 %
LG Minimum on Time
Error Amplifier
500 ns
Open Loop DC Gain (Note 1)
70 80
dB
Output Source Current
Output Sink Current
Input Offset Voltage (Note 1)
Vfb < 0.8 V
Vfb > 0.8 V
2.0
2.0
−2.0 0
mA
2.0 mV
Input Bias Current
0.1 1.0 mA
Unity Gain Bandwidth (Note 1)
15 Mhz
Disable Threshold
0.6 0.8
V
Output Source Current During Disable
Gate Drivers
10 40 mA
Upper Gate Source
Upper Gate Sink
VCC = 5 V, VUG − VLX = 2.5 V
1.5
1.4
A
W
Lower Gate Source
1.5 A
Lower Gate Sink
UG Falling to LG Rising Delay
LG Falling to UG Rising Delay
Soft−Start
VCC = 12 V
VCC = 12 V, UG−LX < 2.0 V, LG > 2.0 V
VCC = 12 V, LG < 2.0 V, UG > 2.0 V
12.4
12.4
1.0
18
18
W
ns
ns
Soft−Start time
Power Good
3.0 7.0 ms
Output Voltage
Logic Low, Sinking 4 mA
0.4 V
OVP Threshold to PGOOD Output Low
Ramp VOS from 0.7 to 1.2.
Monitor when PGOOD goes Low
0.88 1.0 V
OVP Threshold to Part Disable
Ramp VOS from 0.8 to 1.2.
Monitor when outputs disable
1.0 1.2 V
UVP Threshold to PGOOD Output Low
Ramp VOS from 800 mV to 500 mV.
Monitor when PGOOD goes Low
0.65 0.72
V
UVP Threshold to Part Disable
Ramp VOS from 800 mV to 500 mV. 0.5 0.6
Monitor when utputs stop switching
V
Overcurrent Protection
OC Current Source (Note 1)
Sourced from LG pin, before SS
9.0 10
11 mA
1. Guaranteed by design but not tested in production.
www.onsemi.com
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NCP1589B 전자부품, 판매, 대치품
4.0 V
VCC
NCP1589A, NCP1589B
Internal
UVLO
Fault
COMP
−0.7 V
LG
UG
VOUT
1.45 V
700 mV
50 mV
OCP
Program-
mable
0.8 V
FB
PGOOD
POR
UVLO
SS NORMAL
Figure 7. Typical Startup Sequence
3.6 V
www.onsemi.com
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Low Voltage Synchronous Buck Controller

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