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RT8249 Datasheet(PDF) 20 Page - Richtek Technology Corporation

Part # RT8249
Description  Dual-Channel Synchronous DC/DC Step-Down Controller with 5V/3.3V LDOs
PDF  23 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8249 Datasheet(HTML) 20 Page - Richtek Technology Corporation

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RT8249A/B/C
20
DS8249A/B/C-02
June 2014
www.richtek.com
©
Copyright
2014 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Table 3. Enabling/PGOOD State (RT8249B)
Table 2. Enabling/PGOOD State (RT8249A)
EN1
EN2
LDO5
LDO3
CH1 (5VOUT)
CH2 (3.3VOUT)
VCLK
PGOOD
OFF
OFF
OFF
ON
OFF
OFF
OFF
Low
ON
OFF
ON
ON
ON
OFF
ON
Low
OFF
ON
ON
ON
OFF
ON
OFF
Low
ON
ON
ON
ON
ON
ON
ON
High
EN1
EN2
LDO5
LDO3
CH1 (5VOUT)
CH2 (3.3VOUT)
VCLK
PGOOD
OFF
OFF
ON
ON
OFF
OFF
OFF
Low
ON
OFF
ON
ON
ON
OFF
ON
Low
OFF
ON
ON
ON
OFF
ON
OFF
Low
ON
ON
ON
ON
ON
ON
ON
High
Table 4. Enabling/PGOOD State (RT8249C)
EN1
EN2
LDO5
LDO3
CH1 (5VOUT)
CH2 (3.3VOUT)
VCLK
PGOOD
OFF
OFF
OFF
ON
OFF
OFF
OFF
Low
ON
OFF
ON
ON
ON
OFF
OFF
Low
OFF
ON
ON
ON
OFF
ON
OFF
Low
ON
ON
ON
ON
ON
ON
OFF
High
VIN
LDO3
EN1
LDO5
5V VOUT
EN2
3.3V VOUT
PGOOD
VIN POR threshold
EN threshold
EN threshold
VREG5 UVLO threshold
PGOOD
Delay
Soft-Start Time
Soft-Start Time
Start-Up Time
Start-Up Time
Figure 5. RT8249A/C Timing



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