参数资料
型号: NCP5380AMNR2G
厂商: ON Semiconductor
文件页数: 11/28页
文件大小: 0K
描述: IC CTLR SYNC BUCK SGL 32QFN
标准包装: 5,000
应用: 控制器,Intel VR11
输入电压: 5V
输出数: 1
输出电压: 0.5 V ~ 1.6 V
工作温度: -40°C ~ 100°C
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘
供应商设备封装: 32-QFN(5x5)
包装: 带卷 (TR)
NCP5380, NCP5380A
Theory of Operation
The NCP5380/A is a ramp ? pulse ? modulated (RPM)
controller for synchronous buck power supply. The internal
7 ? bit VID DAC conforms to the Intel VR11 specifications.
The NCP5380/A is a stable, high performance architecture
that includes
? High speed response at the lowest possible switching
frequency and minimal count of output decoupling
capacitors
? Minimized thermal switching losses due to lower
frequency operation
? High accuracy load line regulation
? High power conversion efficiency with a light load by
automatically switching to DCM operation
Operation Modes
The NCP5380/A runs in RPM mode for the purpose of fast
transient response and high light load efficiency. During the
following transients, the NCP5380/A runs in PWM mode:
? Soft ? Start
? Soft transient: the period of 100 m s following any VID
change
? Current overload
SW
I R = A R X I RAMP
C R
1.0 V
VRMP
-
+
-
+
400 ns
Q
Q
Flip ? Flop
S Q
RD
Flip ? Flop
S
Q
Gate
Driver
BST
DRVH
IN
DCM
DRVL
BST
DRVH
SW
DRVL
5 .0 V
V CC
R I
L
LOAD
RD
-
+
R2
-
+
R1
30 mV ?
+ V CS
+
-
S
+
+ ?
+ V DC
R2
1.0 V
?
S
+
R1
CSREF
+
-
CSFB
COMP
FB
FBRTN
LLINE
CSCOMP
R A
C A
C B
C CS
R CS
R PH
C FB
R FB
Figure 10. RPM Mode Operation
http://onsemi.com
11
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