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CS5150HGDR16 数据表(PDF) 11 Page - ON Semiconductor

部件名 CS5150HGDR16
功能描述  CPU 4?묪it Synchronous Buck Controller
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

CS5150HGDR16 数据表(HTML) 11 Page - ON Semiconductor

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CS5150H
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11
condition ceases or the input voltage is pulled low. The
bottom FET and board trace must be properly designed to
implement the OVP function.
Figure 14. OVP Response to an Input−to−Output
Short Circuit by Immediately Providing 0% Duty
Cycle, Crow−Barring the Input Voltage to Ground
M 10.0 μs
Trace 1− Regulator Output Voltage (1.0 V/div.)
Trace 2− Inductor Switching Node 5.0 V/div.)
Trace 4− 5.0 V from PC Power Supply (5.0 V/div.)
Figure 15. OVP Response to an Input−to−Output Short
Circuit by Pulling the Input Voltage to Ground
M 5.00 ms
Trace 1− Regulator Output Voltage (1.0 V/div.)
Trace 4− 5.0 V from PC Power Supply (2.0 V/div.)
External Output Enable Circuit
On/off control of the regulator can be implemented
through the addition of two additional discrete components
(see Figure 16). This circuit operates by pulling the Soft
Start pin high, and the VFFB pin low, emulating a short
circuit condition.
Figure 16. Implementing Shutdown with the CS5150H
Shutdown
Input
5.0 V
MMUN2111T1 (SOT−23)
5
8 V
FFB
SS
IN4148
CS5150H
External Power Good Circuit
An optional Power Good signal can be generated through
the use of four additional external components (see Figure
17). The threshold voltage of the Power Good signal can be
adjusted per the following equation:
VPower Good +
(R1 ) R2)
0.65 V
R2
This circuit provides an open collector output that drives
the Power Good output to ground for regulator voltages less
than VPower Good.
Figure 17. Implementing Power Good with the CS5150H
5.0 V
Power Good
10 k
VOUT
PN3904
6.2 k
R1
R2
PN3904
10 k
R3
CS5150H


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