RT9758 datasheet(11/61 Pages) RICHTEK

11 / 61 page

RT9758

is a registered trademark of Richtek Technology Corporation.

DS9758-03

May 2023

www.richtek.com

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

VOUT_ERR Detect Level

tVOUT_ERR

VBUS = 5V, in Bypass or DIV2

mode

0.8

1.2

VOUT_ERR Off Time

tVOUT_ERR_OFF_TIME

Only active in Bypass mode,

select by register 0x11[1] = 0,

default

Only active in Bypass mode,

select by register 0x11[1] = 1

CFLY_DIAG Detect Level

VCFLY_DIAG

Detect CFL pin voltage when

CFLY pre-charge is finished in

DIV2 mode or reverse DIV2

mode.

0.8

1.2

Thermal Shutdown

Threshold

TDIE_OTP_TH

140

°C

Thermal Shutdown

Hysteresis

TDIE_OTP_HYS

°C

Thermal Shutdown

Deglitch Time

tTDIE_DEG

Rising/Falling

VBUS_LOW_ERR

Accuracy

VBUS_LOW_ERR_ACC

VBUS_LOW_ERR = VBUS/VOUT,

falling threshold for device can

start reverse DIV2 mode but can't

start DIV2 mode.

1.95

1.975

V/V

VBUS_LOW_ERR = VBUS/VOUT,

falling threshold for device can

start reverse bypass mode but

can't start bypass mode

0.98

0.99

VBUS_LOW_ERR

Hysteresis

VBUS_LOW_ERR_HYS

VBUS_LOW_ERR rising hysteresis

for device can start DIV2 mode

but can't start reverse DIV2

mode.

0.025

V/V

VBUS_LOW_ERR rising hysteresis

for device can start bypass mode

but can't start reverse bypass

mode.

0.018

VBUS LOW ERR Deglitch tVBUS_LOW_ERR_DEG

s

Converter OCP Threshold ICON_OCP_TH

fSW = 500kHz, VBUS = 10V

10.8

13.2

Function Threshold and Accuracy

VOUT Pre-Charge

Current Range

IOUT_PRE_CHG_RAN

Default = 500mA per phase

330

660

VOUT Pre-Charge

Current Accuracy

IOUT_PRE_CHG_ACC

VBUS = 9.5V, in DIV2 single

phase mode, PRECHARGE_

CURRENT = 500mA

−20

VOUT Pre-Charge Timing

tVOUT_PRE_CHG

Select by register 0x11[3:2] = 00

0.5

Select by register 0x11[3:2] = 01

Select by register 0x11[3:2] = 10,

default

Select by register 0x11[3:2] = 11

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