CS5212D datasheet(4/16 Pages) ONSEMI

부품명	CS5212D

상세설명	Low Voltage Synchronous Buck Controller

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CS5212

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ELECTRICAL CHARACTERISTICS (continued) (–40

°C < TA < 85°C (CS5212E); 0°C < TA < 70°C (CS5212G); –40°C < TJ < 125°C;

3.1 V < VCC < 3.5 V; 3.1 V < VC < 7.0 V; 4.5 V < BST < 20 V; CGATE(H) = CGATE(L) = 3.3 nF; ROSC = 51 k; CCOMP = 0.1 µF, unless other-

wise specified.)

Characteristic

Unit

Max

Typ

Min

Test Conditions

GATE(H) and GATE(L)

Rise Time

VC = BST = 7.0 V, Measure:

0.7 V < GATE(L) < 6.3 V,

0.7 V < GATE(H) < 6.3 V

–

40

80

ns

Fall Time

VC = BST = 7.0 V, Measure:

0.7 V < GATE(L) < 6.3 V,

0.7 V < GATE(H) < 6.3 V

–

40

80

ns

GATE(H) to GATE(L) Delay

GATE(H) < 2.0 V, GATE(L) > 2.0 V

40

70

110

ns

GATE(L) to GATE(H) Delay

GATE(L) < 2.0 V, GATE(H) > 2.0 V

40

70

110

ns

GATE(H)/(L) Pull–Down

Resistance to PGND

20

50

115

K

Ω

Overcurrent Protection

OVC Comparator Offset Voltage

0 V < IS+ < VCC, 0 V < IS– < VCC

54

60

66

mV

IS+ Bias Current

0 V < IS+ < VCC

–1.0

0.1

1.0

µA

IS– Bias Current

0 V < IS– < VCC

–1.0

0.1

1.0

µA

COMP Discharge Threshold

–

0.20

0.25

0.30

V

COMP Discharge Current in OVC

Fault Mode

COMP = 1.0 V

2.0

5.0

8.0

µA

PWM Comparator

Transient Response

COMP = 0 – 1.5 V, VFFB, 20 mV overdrive

–

100

200

ns

PWM Comparator Offset

VFB = VFFB = 0 V; Increase COMP until

GATE(H) starts switching

0.35

0.40

0.45

V

Artificial Ramp

Duty Cycle = 90%

40

70

100

mV

VFFB Bias Current

VFFB = 0 V

–

0.1

1.0

µA

VFFB Input Range

Note 3.

–

1.1

V

Minimum Pulse Width

–

200

ns

Oscillator

Switching Frequency

ROSC = 18 k

600

750

900

kHz

Switching Frequency

ROSC = 51 k

240

300

360

kHz

Switching Frequency

ROSC = 115 k

120

150

180

kHz

ROSC Voltage

–

1.21

1.25

1.29

V

General Electrical Specifications

VCC Supply Current

COMP = 0 V (no switching)

–

5.0

8.0

mA

BST/VC Supply Current

COMP = 0 V (no switching)

–

2.0

3.0

mA

Start Threshold

GATE(H) Switching, COMP Charging

2.7

2.8

2.9

V

Stop Threshold

GATE(H) Not Switching, COMP Not Charging

2.6

2.7

2.8

V

Hysteresis

Start–Stop

75

100

125

mV

Sense Ground Current

Note 4.

–

0.15

1.00

mA

3. GBD.

4. Recommended maximum operating voltage between the three grounds is 200 mV.

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