CS51221 datasheet(3/12 Pages) CHERRY

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PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Electrical Characteristics: -40˚C < TA < 85˚C; -40˚C < TJ < 125˚C; 3V < VC < 15V; 4.7V < VCC < 15V; Rt=12K, Ct=390pF

Unless otherwise stated.

Start/Stop Voltages

Start Threshold

4.4

4.6

4.7

Stop Threshold

3.2

3.8

4.1

Hysteresis

Start - Stop

400

850

1400

ICC @ Startup

VCC < UVL Start Threshold

µA

Supply Current

ICC Operating

9.5

IC Operating

1nF Load on GATE

IC Operating

No switching

Reference Voltage

Total Accuracy

0mA < IREF < 2mA

3.2

3.3

3.4

Line Regulation

Load Regulation

0mA < IREF < 2mA

Noise Voltage

10Hz < F < 10kHz (Note 1)

µV

Op Life Shift

T = 1000Hrs. (Note 1)

Fault Voltage

2.8

2.95

3.1

VREF(OK) Voltage

2.9

3.05

3.2

VREF(OK) Hysteresis

100

150

Current Limit

100

Error Amp

Reference Voltage

VFB = COMP

1.234

1.263

1.285

VFB Input Current

VFB = 1.2V

1.3

µA

Open Loop Gain

(Note 1)

Unity Gain Bandwidth

(Note 1)

1.5

MHz

COMP Sink Current

COMP = 1.4V, VFB = 1.45V

COMP Source Current

COMP = 1.4V, VFB = 1.15V

1.6

2.0

COMP High Voltage

VFB = 1.15V

2.8

3.1

3.4

COMP Low Voltage

VFB = 1.45V

125

300

PSRR

Freq = 120Hz (Note 1)

SS Clamp, VCOMP

SS = 1.4V, VFB = 0V, ISET = 2V

1.3

1.4

1.5

COMP Max Clamp

Note 1

1.7

1.8

1.9

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