NCP5423 datasheet(6/16 Pages) ONSEMI

Part #	NCP5423

Description	Dual Out?뭥f?뭁hase Synchronous Buck Controller with Current Limit

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP5422A, NCP5423

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6

VCC

Set

Dominant

IS+1

PWM

Comparator 1

PWM

Comparator 2

Reset

Dominant

CURRENT

SOURCE

GEN

BST

FAULT

BIAS

FAULT

R

S

R

S

R

S

RAMP1

GATE(H)1

5.0

mA

0.425 V

0.25 V

COMP1

-

+

−

+

−

+

−

+

−

COMP2

VFB1

RAMP2

FAULT

Reset

Dominant

GATE(L)1

GATE(H)2

GATE(L)2

GND

VCC

BST

VCC

RAMP1

RAMP2

CLK1

CLK2

OSC

0.425 V

1.0 V

E/A2

E/A OFF

E/A1

E/A OFF

ROSC

Q

1.2 mA

VFB2

1.0 V

VCC

−

+

−

+

IS−1

IS+2

IS−2

−

8.6 V

70 mV

BST

Figure 2. Block Diagram

7.8 V

FAULT

non−overlap

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NCP5423 Datasheet(PDF) 6 Page - ON Semiconductor

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