RT4722C 参数 Datasheet PDF下载

RT4722C

Absolute Maximum Ratings











(Note 1)

PVIN, AVIN, VO1, LX1, FBS, FD, ENO3, SWIRE------------------------------------------------------------

0.3V

to 6V

VO3, LX3 ---------------------------------------------------------------------------------------------------------------

0.3V

to 12V

VO2 ----------------------------------------------------------------------------------------------------------------------

6V

to 0.3V

LX2-----------------------------------------------------------------------------------------------------------------------

6V

to 6V

Power Dissipation, P

D

@ T

A

= 25C

WQFN-16L 3x3 -------------------------------------------------------------------------------------------------------

3.33W



Package Thermal Resistance

(Note 2)

WQFN-16L 3x3,



JA

-------------------------------------------------------------------------------------------------

30C/W

WQFN-16L 3x3,



JC

-------------------------------------------------------------------------------------------------

7.5C/W









Lead Temperature (Soldering, 10sec.) --------------------------------------------------------------------------

260C

Junction Temperature -----------------------------------------------------------------------------------------------

150C

Storage Temperature Range --------------------------------------------------------------------------------------

65C

to 150C

ESD Susceptibility

(Note 3)

HBM (Human Body Model) ----------------------------------------------------------------------------------------

2kV

Recommended Operating Conditions







(Note 4)

Supply Input Voltage -----------------------------------------------------------------------------------------------

2.9V

to 4.5V

Ambient Temperature Range ------------------------------------------------------------------------------------

40C

to 85C

Junction Temperature Range ------------------------------------------------------------------------------------

40C

to 125C

Electrical Characteristics

(V

IN

= 3.7V, V

O1

= 4.6V, V

O2

=

4V,

V

O3

= 6.1V, T

A

= 25C, unless otherwise specified)

Parameter

Power Supply

Input Voltage Range

Under Voltage Lockout High

Under Voltage Lockout Hys

VIN Shutdown Current

ENO3, SWIRE, FD Input High

Threshold

ENO3, SWIRE, FD Input Low

Threshold

ENO3 Pull Down Current

SWIRE Pull-down Resistor

Operation Section

Switching Frequency

VO1 Maximum Duty

VO2 Maximum Duty

VO3 Maximum Duty

Symbol

Test Conditions

Min

Typ

Max

Unit

V

IN

UVLO_H

V

IN

rising

2.9

2.3

--

--

1.2

--

--

--

3.7

2.4

0.2

--

--

--

--

150

4.5

2.5

--

1

--

0.4

10

--

V

V

V

A

V

V

A

k

UVLO_Hys V

IN

hysteresis

I

SHDN

V

IH

V

IL

I

ENO3

R

SWIRE

ENO3 = GND, SWIRE = GND

V

IN

= 2.9V to 4.5V

V

IN

= 2.9V to 4.5V

f

SW

D

MAX_N1

D

MAX_NN1

D

MAX_N3

PWM mode

No load

No load

No load

1.35

--

--

--

1.5

87

87

87

1.65

--

--

--

MHz

%

%

%

Copyright © 2017 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS4722C-00

September 2017

www.richtek.com

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