NCP5425DBR2G datasheet(7/22 Pages) ONSEMI

Part #	NCP5425DBR2G

Description	Dual Synchronous Buck Controller

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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NCP5425

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7

GATE(H)2

GATE(L)2

VCC

Figure 2. Block Diagram

LNDM

BST

LNDM

R

S

Reset

Dominant

Q

CLK2

+

−

IS+2

IS−2

−

+

70 mV

OC2

+

−

+

70 mV

OC1

+

−

PWM

COMP2

EA2

3.1 V

+

RAMP2

0.3 V

VCC

LNDM

R

S

Reset

Dominant

Q

CLK1

+

−

+

−

PWM

COMP1

−

EA1

+

−

3.1 V

+

RAMP1

0.3 V

UVLO

BST

GATE(L)1

COMP1 CLAMP

REFERENCE

UVLO

0.8 V

COMP2

VREF2

VFB2

COMP1

VFB1

+

−

UVLO

4.2 V

4.0 V

VCC

OSCILLATOR

AND

RAMP

CURRENT

GENERATOR

IRAMP1

IRAMP2

CLK1

CLK2

LNDM

Low noise disable mode

(pull ROSC high to activate)

REFERENCE

AND BIAS

3.1 V

0.8 V

ROSC

3.1 V

IRAMP1

RAMP1

3.1 V

IRAMP2

RAMP2

S/D

3.1 V

COMP2

CLAMP

REFERENCE

3.1 V

MODE

Single

or dual

output

mode

GND

GATE(H)1

IS+1

IS−1

+

−−

+

−

+

−

+

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