ncp5372 ON Semiconductor, ncp5372 Datasheet - Page 21

• Manufacturer Part Number: ncp5372
• Description: High Efficiency Two-phase Step-down Power Controller For Imvp-6.5 Mobile Cpu Core Power Supplies
• Manufacturer: ON Semiconductor

CONTROL LOGIC
POWER DOWN
CS1N
CS2N
The control logic will provide timing and sequencing for Startup, Soft start, and Power Down.
CS1
CS2
CS Buffer/Level Shift
Rev0.3
Av=1
Av=1
Av=1
Av=1
Figure 5. Thermally Compensated Vdroop and Imon Circuit Diagram
Confidential and Proprietary – Not for Public Release
R
R
R
R
CSSUM=-6*(CS1+CS2)
CSSUM Amplifer
Figure 6. Power Off Sequencing Timing Diagram
6R
-
+
6R
ON Semiconductor CONFIDENTIAL
CSSUM
Mar 19, 2008 - Page 19
Rexternal
Rexternal
Vdroop Amplifier
Rexternal
U7
-
+
RNTC
0
Voffset
VDRP
R
R
Output internally limited to less than 1.15V
with respect to VSN.
full load current and sat low must be less
than 50mV..
500uA source/sink
Imon Amplifier
+
-
4R
4R
Must produce 1V at
U7
VSN
IMON