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CS5212ED14 Scheda tecnica(PDF) 5 Page - ON Semiconductor

Il numero della parte CS5212ED14
Spiegazioni elettronici  Low Voltage Synchronous Buck Controller
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Produttore elettronici  ONSEMI [ON Semiconductor]
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CS5212
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5
PACKAGE PIN DESCRIPTION
PIN NO.
PIN SYMBOL
FUNCTION
1
GATE(H)
High Side Switch FET driver pin. Capable of delivering peak currents of 1.0 A.
2
BST
Power supply input for the high side driver.
3
LGND
Reference ground. All control circuits are referenced to this pin. IC substrate connection.
4
VFFB
Input for the PWM comparator.
5
VFB
Error amplifier input.
6
COMP
Error Amp output. PWM Comparator reference input. A capacitor to LGND provides error amp
compensation.
7
SGND
Internal reference is connected to this ground. Connect directly at the load for ground remote
sensing.
8
ROSC
A resistor from this pin to SGND sets switching frequency.
9
VCC
Input Power Supply Pin. It supplies power to control circuitry. A 0.1
µF Decoupling cap is
recommended.
10
IS–
Negative input for overcurrent comparator.
11
IS+
Positive input for overcurrent comparator.
12
VC
Power supply input for the low side driver.
13
GATE(L)
Low Side Synchronous FET driver pin. Capable of delivering peak currents of 1.0 A.
14
PGND
High Current ground for the GATE(H) and GATE(L) pins.
UVLO
Comparator
5.0
µA
GATE(L)
GATE(H)
+
+
+
Σ
PGND
ROSC
VC
BST
R
S
Q
Q
S
R
Q
Q
Fault
Fault
PWM FF
COMP Discharge COMP
0.25 V
PWM Comparator
ART Ramp
OSC
ROSC
0.5 V
Error Amp
1.0 V
100 % DC
Comparator
VSTART
OC
Comparator
60 mV
0.8 V
UVLO
LGND
VCC
IS–
IS+
SGND
VFB
COMP
VFFB
Figure 2. Block Diagram
Reset Dominant
Set Dominant


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