SMH4803A View Datasheet(PDF) - Summit Microelectronics

Part Name

Description

MFG CO.

SMH4803A

Distributed Power Hot Swap Controller

Summit Microelectronics 

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SMH4803A

Preliminary

VDD

UV

OV

11 ≤ VDD ≤ 13

2.5VREF

<tPUVF

PD1#/

PD2#

VGATE

tPDD

VDD – VGT

VDD

DRAIN

SENSE

CBSENSE

PG1#

ENPGA

PG2#

ENPGB

PG3#

5V

50mVREF

2.5VREF

tPGD

<tCBD

tPGD

Figure 1. Complete Power On Timing Sequence

2051 Fig01 1.1

TIMING RELATIONSHIPS

Figure 1 illustrates some of the power on sequences,

including the UV and OV differentials to their reference,

and Power Good cascading.

Figures 2, 3, and 4 indicate the affect on the VGATE

signal caused by different Circuit Breaker inputs. In

Figure 2 RESET# and MODE are high; in Figure 3

MODE is low. Figure 4 shows the Quick Trip mode.

2051 4.4 3/15/01

SUMMIT MICROELECTRONICS, Inc.

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