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RT6310C/CH Datasheet(PDF) 17 Page - Richtek Technology Corporation

Part # RT6310C/CH
Description  10A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
PDF  54 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT6310C/CH Datasheet(HTML) 17 Page - Richtek Technology Corporation

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RT6310
Copyright © 2023 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6310-04
August 2023
www.richtek.com
17
⚫
Soft-start is not completed
⚫
The FB/FF/VOUT pin voltage is lower than PGOOD
falling threshold (PGOOD rising threshold minus
PGOOD hysteresis voltage) of the target voltage
Power Sequence
The power sequence of RT6310 includes VIN pin power
on/off and EN/MODE pin power on/off. The detailed
sequence information is shown in Figure 4 to Figure 12.
VIN_UVLO_ON = 4.1V
UVLO OK
PGOOD high
SS OK
VIN
VEN/MODE
VOUT
VPGOOD
VEN/MODE_H = 0.635V
EN/MODE OK
tR = 0.45ms
tSS = 2.4ms
tENDLY
RT6310A/AH
DEM: VEN/MODE
2.3V
USM: VEN/MODE = 0.88V~1.7V
VIN_ULVO_ON AND VEN/MODE_H
Enable SS counter
VCC
100%VOUT
10%VOUT
90%VOUT
VCC_EXT = 5V
(External)
VCC = 5V
VCC Bypass Switch
(VCC_EXT to VCC)
VCC_EXT
4.7V AND SS OK AND UVLO OK AND
EN/MODE OK
VCC Bypass Switch on
VIN to VCC
VCC_EXT to VCC
Note
1. SS (soft-start): soft-start with ramp
RT6310D/DH
DEM: VEN/MODE
0.88V
Figure 4. Power On Sequence of RT6310A/AH/D/DH : Ramping Up VIN Followed by VEN/MODE



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