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A4490EESTR-T Datasheet(PDF) 8 Page - Allegro MicroSystems

Part # A4490EESTR-T
Description  Triple Output Step-Down Switching Regulator
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A4490EESTR-T Datasheet(HTML) 8 Page - Allegro MicroSystems

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Triple Output Step-Down Switching Regulator
A4490
8
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
VBB
VBBUV(su)
VBBUV(por)
VBBCPUV(su)
tPOR
tSS
VBBCPUV(sd)
VBB+VCP
VREG1
VREG2
VREG3
PORZ
0V
VBB+5.5 V
85%FB1
85%FB3
85%FB2
ENB1
0V
VBB
VREG1
VREG2
VREG3
tSS
tSS
tSS
tPOR
tPOR
tPOR
PORZ
85%FB1
85%FB3
85%FB2
ENB3
ENB2
80%FB2
85%FB2
Figure 1. Timing diagram for powering up and down using the VBB pin
Figure 2. Timing diagram for powering up and down using the ENB pin


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