CS5421 datasheet(3/14 Pages) ONSEMI | Dual Out?뭥f?뭁hase Synchronous Buck Controller with Remote Sense

Part No.	CS5421

Description	Dual Out?뭥f?뭁hase Synchronous Buck Controller with Remote Sense

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Manufacturer	ONSEMI [ON Semiconductor]

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CS5421

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ABSOLUTE MAXIMUM RATINGS (continued)

Pin Symbol

ISINK

ISOURCE

VMIN

VMAX

Pin Name

ROSC

Oscillator Resistor

4.0 V

−0.3 V

1.0 mA

GATE(H)1, GATE(H)2

High−Side FET Driver

for Channel 1 or 2

16 V

−0.3 V

1.5 A peak

200 mA DC

1.5 A peak

200 mA DC

GATE(L)1, GATE(L)2

Low−Side FET Driver for

Channel 1 or 2

16 V

−0.3 V

1.5 A peak

200 mA DC

1.5 A peak

200 mA DC

PGND1

Power Ground for Channel 1

0 V

1.5 A peak

200 mA DC

N/A

PGND2

Power Ground for Channel 2

0 V

1.5 A peak

200 mA DC

N/A

SGND

Ground for Internal Reference

150 mV

0 V

1.0 mA

N/A

LGND

Logic Ground

0 V

50 mA

N/A

ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; ROSC = 30.9 k, CCOMP1,2 = 0.1 μF,

10.8 V < VCC < 13.2 V; CGATE(H)1,2 = CGATE(L)1,2 = 1.0 nF, unless otherwise specified.)

Characteristic

Test Conditions

Min

Typ

Max

Unit

Error Amplifier

VFB1(2) Bias Current

VFB1(2) = 0 V

−

0.1

1.0

μA

COMP1,2 Source Current

COMP1,2 = 1.2 V to 2.5 V; VFB1(2) = 0.8 V

15

30

60

μA

COMP1,2 Sink Current

COMP1,2 = 1.2 V; VFB1(2) = 1.2 V

15

30

60

μA

Reference Voltage 1

COMP1 = VFB1; 25°C < TJ < 125°C

0.992

1.000

1.008

V

Reference Voltage 2

COMP2 = VFB2

0.980

1.000

1.020

V

COMP1,2 Max Voltage

VFB1(2) = 0.8 V

3.0

3.3

−

V

COMP1,2 Min Voltage

VFB1(2) = 1.2 V

−

0.25

0.35

V

Open Loop Gain

−

95

−

dB

Unity Gain Band Width

−

40

−

kHz

PSRR @ 1.0 kHz

−

70

−

dB

Transconductance

−

32

−

mmho

Output Impedance

−

2.5

−

MΩ

GATE(H) and GATE(L)

High Voltage (AC)

Measure: VCC − GATE(L)1,2;

VCC − GATE(H)1,2; Note 2

−

0

0.5

V

Low Voltage (AC)

Measure:GATE(L)1,2 or GATE(H)1,2; Note 2

−

0

0.5

V

Rise Time

1.5 V < GATE(L)1,2 < VCC − 1.5 V

1.5 V < GATE(H)1,2 < VCC − 1.5 V

−

25

60

ns

Fall Time

VCC − 1.5 > GATE(L)1,2 > 1.5 V

VCC − 1.5 > GATE(H)1,2 > 1.5 V

−

20

60

ns

GATE(H) to GATE(L) Delay

GATE(H)1,2 < 1.0 V, GATE(L)1,2 > 1.0 V

40

70

100

ns

GATE(L) to GATE(H) Delay

GATE(L)1,2 < 1.0 V, GATE(H)1,2 > 1.0 V

40

70

100

ns

GATE(H)1(2) and GATE(L)1(2)

pull−down

Resistance to PGND

Note 2

50

125

280

kΩ

2. Guaranteed by design, not 100% tested in production.

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