RT6310CSLASHCH datasheet(17/54 Pages) RICHTEK

17 / 54 page

RT6310

is a registered trademark of Richtek Technology Corporation.

DS6310-04

August 2023

www.richtek.com

⚫

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

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

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

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