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Part Name
Description
CS51033 View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
CS51033
Fast P−Ch FET Buck Controller
ON Semiconductor
CS51033 Datasheet PDF : 10 Pages
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7
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10
PACKAGE PIN DESCRIPTION
Pin Number
Pin Symbol
1
V
GATE
2
PGND
3
C
OSC
4
GND
5
V
FB
6
V
CC
7
CS
8
V
C
CS51033
Function
Driver pin to gate of external P−Ch FET.
Output power stage ground connection.
Oscillator frequency programming capacitor.
Logic ground.
Feedback voltage input.
Logic supply voltage.
Soft−Start and fault timing capacitor.
Driver supply voltage.
C
OSC
V
CC
I
C
7I
C
1.5 V
V
CC
V
CC
I
T
CS
I
T
55
G3
I
T
5
1.5 V
Oscillator
+
Comparator
A1
−
G1
2.5 V
V
C
RG
V
GATE
Flip−Flop
RQ
F2
G2
S Q
V
FB
Comparator
A6
1.25 V
V
GATE
PGND
V
FB
0.7 V
Hold Off
Comp
Fault
Comp
1.15 V
G4
CS
+
Comparator
A2
−
RQ
F1
2.5 V
2.4 V
G5
SQ
Slow Discharge
Flip−Flop
−
A3
+
Slow Discharge
Comparator
CS Charge
Sense
Comparator
A4
2.3 V
GND
Figure 2. Block Diagram
http://onsemi.com
4
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