CS5124 datasheet(3/11 Pages) ONSEMI

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CS5124

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ELECTRICAL CHARACTERISTICS (−40°C ≤ TJ ≤ 125°C; −40°C ≤ TA ≤ 105°C, 7.60 V ≤ VCC ≤ 20 V, UVLO = 3.0 V,

ISENSE = 0 V, CV(CC) = 0.33 mF, CGATE = 1.0 nF (ESR = 10 W); CSS = 470 pF; CV(FB) = 100 pF, unless otherwise specified.)

Characteristic

Test Conditions

Min

Typ

Max

Unit

General

ICC Operating − VGATE not switching

−

ICC at VCC Low

VCC = 6.0 V

−

500

750

ICC Sleep

VUVL = 1.0 V

−

210

275

Low VCC Lockout

VCC Turn−on Threshold Voltage

−

7.2

7.7

8.3

VCC Turn−off Threshold Voltage

−

6.8

7.3

7.8

VCC Hysteresis

−

350

425

500

UVLO

Sleep Threshold Voltage

UVLO decreasing

1.5

1.8

2.3

Sleep Threshold Voltage

UVLO increasing

−

1.88

2.45

Sleep Hysteresis

−

150

UVLO Turn−off Threshold Voltage

(Note 2)

2.3

2.45

2.6

UVLO Turn−on Threshold Voltage

(Note 2)

2.50

2.63

2.76

UVLO Hysteresis

Turn−on − Turn−off (−40°C ≤ TJ ≤ 100°C) (Note 2)

170

185

200

UVLO Hysteresis

Turn−on − Turn−off (100°C ≤ TJ ≤ 125°C) (Note 2)

185

400

UVLO Input Bias Current

−

−1.0

−

1.0

UVLO Clamp

With UVLO sinking 1.0 mA

5.0

7.5

VCC Clamp and BIAS Pin

Connect an NFET as follows: BIAS = G, VCC = S, VIN = D.

VCC Clamp Voltage

36 V ≤ VIN ≤ 60 V, 200 nF ≤ CSS ≤ 500 nF,

R = 500 k

7.275

7.9

8.625

BIAS Minimum Voltage

Measure Voltage on BIAS with:

10 V ≤ VCC ≤ 20 V & 50 mA ≤ IBIAS ≤ 1.0 mA

1.6

2.8

4.0

BIAS Clamp

With BIAS pin sinking 1.0 mA

Difference between Regulated VCC

& VCC Turn−on Threshold Voltage

(VCC Clamp Voltage) − (VCC Turn−on Threshold)

100

−

400 kHz Oscillator

Operating Frequency

−

360

400

440

kHz

Max Duty Cycle Clamp

−

80.0

82.5

85.0

Slope Compensation

−

mV/m

2. Not tested in production. Specification is guaranteed by design.

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