CS5157H Просмотр технического описания (PDF) - ON Semiconductor

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производитель

CS5157H

CPU 5−Bit Synchronous Buck Controller

ON Semiconductor 

CS5157H

ELECTRICAL CHARACTERISTICS (0°C < TA < +70°C; 0°C < TJ < +125°C; 8.0 V < VCC1 < 14 V; 5.0 V < VCC2 < 20 V;DAC Code:

VID4 = VID2 = VID1 = VID0 = 1; VID3 = 0; CVGATE(L) and CVGATE(H) = 1.0 nF; COFF = 330 pF; CSS = 0.1 mF, unless otherwise specified.)

Characteristic

Test Conditions

Min

Typ

Max

Unit

Error Amplifier

VFB Bias Current

Open Loop Gain

Unity Gain Bandwidth

VFB = 0 V

1.25 V < VCOMP < 4.0 V; (Note 2)

(Note 2)

−

0.3

1.0

mA

50

60

−

dB

500

3000

−

kHz

COMP SINK Current

COMP SOURCE Current

COMP CLAMP Current

COMP High Voltage

COMP Low Voltage

PSRR

VCC1 Monitor

Start Threshold

VCOMP = 1.5 V; VFB = 3.0 V; VSS > 2.0 V

VCOMP = 1.2 V; VFB = 2.7 V; VSS = 5.0 V

VCOMP = 0 V; VFB = 2.7 V

VFB = 2.7 V; VSS = 5.0 V

VFB = 3.0 V

8.0 V < VCC1 < 14 V @ 1.0 kHz; (Note 2)

Output switching

0.4

2.5

8.0

mA

30

50

80

mA

0.4

1.0

1.6

mA

4.0

4.3

5.0

V

−

160

600

mV

60

85

−

dB

3.75

3.90

4.05

V

Stop Threshold

Output not switching

3.70

3.85

4.00

V

Hysteresis

Start−Stop

−

50

−

mV

VGATE(H) and VGATE(L)

Out SOURCE Sat at 100 mA

Out SINK Sat at 100 mA

Out Rise Time

Measure VCC1 − VGATE(L); VCC2 − VGATE(H)

−

Measure VGATE(H) − VPGND; VGATE(L) − VPGND

−

1.0 V < VGATE(H) < 9.0 V; 1.0 V < VGATE(L) < 9.0 V;

−

VCC1 = VCC2 = 12 V

1.2

2.0

V

1.0

1.5

V

30

50

ns

Out Fall Time

9.0 V > VGATE(H) > 1.0 V; 9.0 V > VGATE(L) > 1.0 V;

−

VCC1 = VCC2 = 12 V

30

50

ns

Delay VGATE(H) to VGATE(L)

VGATE(H) falling to 2.0 V; VCC1 = VCC2 = 8.0 V;

VGATE(L) rising to 2.0 V

−

25

50

ns

Delay VGATE(L) to VGATE(H)

VGATE(H), VGATE(L) Resistance

VGATE(H), VGATE(L) Schottky

VGATE(L) falling to 2.0 V; VCC1 = VCC2 = 8.0 V;

VGATE(H) rising to 2.0 V

Resistor to LGND (Note 2)

LGND to VGATE(H) @ 10 mA

LGND to VGATE(L) @ 10 mA

−

25

50

ns

20

50

100

kW

−

600

800

mV

Soft−Start (SS)

Charge Time

−

1.6

3.3

5.0

ms

Pulse Period

−

25

100

200

ms

Duty Cycle

(Charge Time /Pulse Period) × 100

1.0

3.3

6.0

%

COMP Clamp Voltage

VFFB SS Fault Disable

High Threshold

VFB = 0 V; VSS = 0

VGATE(H) = Low; VGATE(L) = Low

−

0.50

0.95

1.10

V

0.9

1.0

1.1

V

−

2.5

3.0

V

PWM Comparator

Transient Response

VFFB = 0 to 5.0 V to VGATE(H) = 9.0 V to 1.0 V;

VCC1 = VCC2 = 12 V

VFFB Bias Current

VFFB = 0 V

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

−

100

125

ns

−

0.3

−

mA

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