CS5155H datasheet(11/17 Pages) ONSEMI

Nome de Peças	CS5155H

Descrição Electrónicos	CPU 5?묪it Synchronous Buck Controller

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Fabricante Electrônico	ONSEMI [ON Semiconductor]

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CS5155H

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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 CS5155H

Shutdown

Input

5.0 V

MMUN2111T1 (SOT−23)

5

8 V

FFB

SS

IN4148

CS5155H

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 CS5155H

5.0 V

Power Good

10 k

VOUT

PN3904

6.2 k

R1

R2

PN3904

10 k

R3

CS5155H

Nº de peça semelhante - CS5155H

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Cherry Semiconductor Co...	CS5155H	238Kb / 14P	CPU 5-Bit Synchronous Buck Controller
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Descrição semelhante - CS5155H

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CS5155H Folha de dados(PDF) 11 Page - ON Semiconductor

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Nº de peça semelhante - CS5155H

Descrição semelhante - CS5155H

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