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CS51031GDR8G датащи(PDF) 4 Page - ON Semiconductor

номер детали CS51031GDR8G
подробное описание детали  Fast P?묬h FET Buck Controller
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производитель  ONSEMI [ON Semiconductor]
домашняя страница  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS51031GDR8G датащи(HTML) 4 Page - ON Semiconductor

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CS51031
http://onsemi.com
4
Q
Q
Q
Q
RG
VC
VGATE
PGND
R
S
F2
VGATE
Flip−Flop
G2
+
VFB
Comparator
A6
VFB
1.25 V
G1
0.7 V
Hold Off
Comp
Fault
Comp
1.15 V
A4
CS Charge
Sense
Comparator
R
S
F1
Slow Discharge
Flip−Flop
GND
G4
G5
+
A3
Slow Discharge
Comparator
2.3 V
2.4 V
+
A2
CS
Comparator
2.5 V
1.5 V
IT
55
IT
5
IT
CS
G3
VREF = 3.3 V
COSC
2.5 V
1.5 V
A1
VREF
3.3 V
VCCOK
VCC
Oscillator
Comparator
VCC
VREF
IC
7IC
Figure 2. Block Diagram
CIRCUIT DESCRIPTION
THEORY OF OPERATION
Control Scheme
The CS51031 monitors the output voltage to determine
when to turn on the P−Ch FET. If VFB falls below the internal
reference voltage of 1.25 V during the oscillator’s charge
cycle, the P−Ch FET is turned on and remains on for the
duration of the charge time. The P−Ch FET gets turned off
and remains off during the oscillator’s discharge time with
the maximum duty cycle to 80%. It requires 7.0 mV typical,
and 20 mV maximum ripple on the VFB pin is required to
operate. This method of control does not require any loop
stability compensation.


Аналогичный номер детали - CS51031GDR8G

производительномер деталидатащиподробное описание детали
logo
ON Semiconductor
CS51031GDR8G ONSEMI-CS51031GDR8G Datasheet
100Kb / 10P
   Fast P?묬h FET Buck Controller
October, 2005 ??Rev. 11
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Аналогичное описание - CS51031GDR8G

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