Datasheet SRK1001 (STMicroelectronics) - 24

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SRK1001 Contents Contents 1 Block diagram and pin connection . .2 2 Maximum ratings . .4 3 Typical application schematic . .5 4 Electrical characteristics . .6 5 Operation description . .9 5.1
Drain voltage sensing . 10
5.2
Turn-on . 10
5.3
Minimum TON programming. 10
5.4
Adaptive turn-off and TIMER . 10
5.4.1
Fixed frequency mixed DCM/CCM operation . 11
5.4.2
QR operation (with valley skipping) . 12
5.4.3
Fixed frequency DCM operation . 12
5.4.4
Variable frequency CCM operation . 13
5.5
Minimum TOFF programming . 13
5.6
Start-up phase . 14
5.7
Low consumption mode operation: sleep-mode, burst mode, disable state . 14
5.8
DIS/SYNC pin functions . 15
5.9
VAUX pin operation in CC regulation . 15
5.9.1
Example for parameter calculations . 16
5.10
Operation in CC regulation and short circuit . 18
5.11
Adaptive gate drive . 18
6 Layout guidelines . .20 7 Package mechanical data . .21 Revision history . .23 DS13155
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Rev 1 page 24/27
Document Outline 1 Block diagram and pin connection 2 Maximum ratings 3 Typical application schematic 4 Electrical characteristics 5 Operation description 5.1 Drain voltage sensing 5.2 Turn-on 5.3 Minimum TON programming 5.4 Adaptive turn-off and TIMER 5.4.1 Fixed frequency mixed DCM/CCM operation 5.4.2 QR operation (with valley skipping) 5.4.3 Fixed frequency DCM operation 5.4.4 Variable frequency CCM operation 5.5 Minimum TOFF programming 5.6 Start-up phase 5.7 Low consumption mode operation: sleep-mode, burst mode, disable state 5.8 DIS/SYNC pin functions 5.9 VAUX pin operation in CC regulation 5.9.1 Example for parameter calculations 5.10 Operation in CC regulation and short circuit 5.11 Adaptive gate drive 6 Layout guidelines 7 Package mechanical data Revision history