CS5305 datasheet(7/33 Pages) ONSEMI

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CS5305

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ELECTRICAL CHARACTERISTICS (continued) (0°C < TA < 70°C; 0°C < TJ < 125°C; 9.5 V < VCC < 14 V; CGATEX = 100 pF,

CCOMP = 0.01μF, CSCOMP = 0.01μF, CVCC = 0.1μF, RROSC = 32.4 kΩ, RSHARE = 60.4 kΩ, V(OCSET) = 0.54 V, DAC Code 01110; unless

otherwise stated.)

Parameter

Unit

Max

Typ

Min

Test Conditions

Voltage Feedback Error Amplifier

SHARE Fault Discharge Current

SHARE = 3.5 V,

COMP = 0.5 V,

CSx = CSREF = 0 V,

OCSET = 0.5 V

0.3

2.5

5.0

Enable Input

Threshold Voltage

Monitor DRVON

1.12

1.25

1.38

Pull−up Voltage

1 MΩ to GND

2.5

2.7

3.0

Input Pull−up Resistance

−

100

kΩ

PWM Comparators

Minimum Pulse Width

Measured from CSx to GATEx,

VFB = CSREF = 0.5 V,

COMP = 0.5 V,

60 mV step on CSx;

measure at GATEx = 1.0 V

−

220

Transient Response Time

Measured from CSREF to GATEx,

COMP = 2.1 V,

CSx = CSREF = 0.5 V,

CSREF stepped

from 1.2 V − 2.0 V

−

100

150

Channel Start−up Offset

CSx = CSREF = VFB = 0 V,

measure V(COMP) when

GATEx switch high

0.34

0.6

0.75

Channel Start−up Offset

Mismatch

CSx = CSREF = VFB = 0 V,

measure V(COMP) when

GATEx switch high, Note 4.

−5.0

−

5.0

Gates

High Voltage

IGATEx = 1.0 mA

2.25

2.5

3.0

Low Voltage

IGATEx = 1.0 mA

−

0.2

0.4

Rise Time GATE

0.8 V < GATE < 2.0 V,

VCC = 10 V

−

Fall Time GATE

2.0 V > GATE > 0.8 V,

VCC = 10 V

−

Oscillator

Switching Frequency

ROSC = 32.4 kΩ

300

400

500

kHz

Switching Frequency

ROSC = 63.4 kΩ, Note 4.

150

200

250

kHz

Switching Frequency

ROSC = 16.2 kΩ, Note 4.

600

800

1000

kHz

ROSC Voltage

Note 4.

0.90

1.00

1.10

Phase Delay

−

120

150

deg

4. Guaranteed by design. Not tested in production.

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