CS5211 datasheet(5/13 Pages) ONSEMI

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CS5211

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ELECTRICAL CHARACTERISTICS (−40°C < TA < 85°C; −40°C < TJ < 125°C; 4.5 V < VCC, VC < 14 V; 7.0 V < BST < 20 V;

CGATE(H) = CGATE(L) = 3.3 nF; ROSC = 51 k; CCOMP = 0.1 mF, unless otherwise specified.) (Note 3)

Characteristic

Test Conditions

Min

Typ

Max

Unit

General Electrical Specifications

VCC Supply Current

COMP = 0 V (no switching)

−

5.0

8.0

BST/VC Supply Current

COMP = 0 V (no switching)

−

2.0

3.0

Start Threshold

GATE(H) Switching, COMP Charging

3.90

4.05

4.20

Stop Threshold

GATE(H) Not Switching, COMP Not Charging

3.75

3.90

4.05

Hysteresis

Start−Stop

100

150

200

Sense Ground Current

(Note 4)

−

0.15

1.00

3. Guaranteed by design. Not tested in production.

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

UVLO

Comparator

5.0 mA

GATE(L)

GATE(H)

−

PGND

ROSC

BST

Fault

PWM FF

COMP Discharge COMP

0.25 V

PWM Comparator

ART Ramp

OSC

ROSC

0.5 V

Error Amp

1.0 V

100 % DC

Comparator

VSTART

Comparator

60 mV

0.8 V

UVLO

LGND

VCC

IS−

IS+

SGND

VFB

COMP

VFFB

Figure 2. Block Diagram

Reset Dominant

Set Dominant

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