RT5753

11

DS5753-05 November 2023

www.richtek.com

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Copyright 2023 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Electrical Characteristics

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Supply Voltage

VIN Supply Input Operating

Voltage

VIN

2.5

--

6

V

Undervoltage Lockout Threshold

VUVLO

VIN rising

2.15

2.3

2.45

V

Undervoltage Lockout Threshold

Hysteresis

VUVLO

--

300

--

mV

Supply Current (Shutdown)

ISHDN

VEN = 0V, TA = 25°C

--

--

2

A

VEN = 0V

--

--

15

Supply Current (Quiescent)

IQ

VEN = 2V, VFB = 0.7V, not

switching

--

23

35

A

Soft-Start

Soft-Start Time

tSS

0%VOUT to 95%VOUT,

RT5753A/B/E

1

1.5

2.4

ms

0%VOUT to 95%VOUT,

RT5753C/D/F

0.5

0.75

1.2

Enable Voltage

Enable Voltage Threshold

VEN_H

EN high-level input voltage

0.8

--

1.2

V

VEN_L

EN low-level input voltage

0.4

--

0.85

Enable Pull-Low Current

IEN_PL

--

1.5

--

A

Feedback Voltage

Feedback Threshold Voltage

VFB

0.594

0.6

0.606

V

Feedback Input Current

IFB

VFB = 0.6V, TA = 25°C

--

0.1

0.4

µA

Internal MOSFET

High-Side On-Resistance

RDS(ON)_H

--

100

120

m



Low-Side On-Resistance

RDS(ON)_L

--

70

85

Current Limit

High-Side Switch Current Limit

ILIM_H

VIN = 3.6V, VOUT = 1.2V,

L = 1

H, TA = 25C

3.6

4.14

4.8

A

Low-Side Switch Valley Current

Limit

ILIM_L

3

3.45

3.9

Switching Frequency

Switching Frequency

fSW

1

1.2

1.44

MHz

On-Time Timer Control

Minimum Off-Time

tOFF_MIN

--

90

--

ns

Output Voltage Protection

Output Undervoltage Threshold

(RT5753AH/BH/CH/DH : Hiccup)

(RT5753AL/BL/CL/DL/EL/FL :

Latch-Off)

VUVP

--

40

--

%

(VIN = 3.6V. TJ = TA =

−40°C to 125°C. Typical value is tested at TA = 25°C. The limit over temperature is guaranteed by

characterization, unless otherwise noted.)