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CS5422 Datasheet(PDF) 6 Page - ON Semiconductor

Part No. CS5422
Description  Dual Out−of−Phase Synchronous Buck Controller with Current Limit
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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CS5422 Datasheet(HTML) 6 Page - ON Semiconductor

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CS5422
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6
PACKAGE PIN DESCRIPTION
PACKAGE PIN #
PIN SYMBOL
FUNCTION
SO−16
SO−24L
1
1
GATE(H)1
High Side Switch FET driver pin for channel 1.
2
2
GATE(L)1
Low Side Synchronous FET driver pin for channel 1.
3
GND
Ground pin for all circuitry contained in the IC. This pin is internally
bonded to the substrate of the IC.
3
PGND
Ground pin for the FET drivers.
4
4
BST
Power input for GATE(H)1 and GATE(H)2 pins.
5−8, 17−20
LGND
Ground pin for the internal control circuitry. The pin is internally
bonded to the substrate of the IC.
5
9
IS+1
Positive input for channel 1 overcurrent comparator.
6
10
IS−1
Negative input for channel 1 overcurrent comparator.
7
11
VFB1
Error amplifier inverting input for channel 1.
8
12
COMP1
Channel 1 Error Amp output. PWM Comparator reference input. A
capacitor to LGND provides Error Amp compensation. The same
capacitor provides Soft Start timing for channel 1. This pin also
disables the channel 1 output when pulled below 0.3 V.
9
13
COMP2
Channel 2 Error Amp output. PWM Comparator reference input. A
capacitor to LGND provides Error Amp compensation and Soft
Start timing for channel 2. Channel 2 output is disabled when this
pin is pulled below 0.3 V.
10
14
VFB2
Error amplifier inverting input for channel 2.
11
15
IS−2
Negative input for channel 2 overcurrent comparator.
12
16
IS+2
Positive input for channel 2 overcurrent comparator.
13
21
ROSC
Oscillator frequency pin. A resistor from this pin to ground sets the
oscillator frequency.
14
22
VCC
Input Power supply pin.
15
23
GATE(L)2
Low Side Synchronous FET driver pin for channel 2.
16
24
GATE(H)2
High Side Switch FET driver pin for channel 2.


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