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REV. C

Parameter

Symbol

Limit

Unit

Condition

Min.

Typ.

Max.

Standby Current

-

0

20

μA

EN=0V

Bias Current

-

500

800

μA

EN Low Voltage

-

GND

0.8

V

Standby Mode

EN High Voltage

2.0

Vcc

-

V

Active Mode

EN Input Current

-

2

10

μA

EN=2V

Oscillation Frequency

0.8

1

1.2

MHz

High-side FET ON Resistance

-

60

90

mΩ

-

170

255

mΩ

Low-side FET ON Resistance

-

55

83

mΩ

-

130

195

mΩ

FB Reference Voltage1

FB1

0.985

1.0

1.015

V

±1.5%

FB Reference Voltage2

FB2

0.985

1.0

1.015

V

±1.5%

ITH sink current 1

10

18

-

μA

VFB1=1.2V

ITH source current 1

10

18

-

μA

VFB1=0.8V

ITH sink current 2

10

18

-

μA

VFB2=1.2V

ITH source current 2

10

18

-

μA

VFB2=0.8V

UVLO Threshold Voltage

2.4

2.5

2.6

V

VCC=5→0V

UVLO Release Voltage

2.425

2.55

2.7

V

VCC=0→5V

Soft Start Time

0.5

1

2

ms

Timer Latch Time

0.5

1

2

ms

SCP/TSD ON

Output Short circuit

Threshold Voltage

-

0.5

0.7

V

FB1=1.0→0V(initial)

-

0.5

0.7

V

FB2=1.0→0V(initial)

Digital I/O (SCL,SDA)

INPUT Low Voltage

-

GND

0.2×

V

INPUT High Voltage

0.8×

-

V

Inflow current

-

0

10

μA

SCL=SDA=2.5V

Data Output Low voltage

-

-

0.6

V

FB1,FB2

0.900 V

0.925 V

0.950 V

0.975 V

1.000 V

1.025 V

1.050 V

1.075 V

PIN No

PIN NAME

PIN No

PIN NAME

1

PVCC1

13

GND

2

BST

14

ITH2

3

SW1

15

FB2

4

SW1

16

ITH1

5

SW1

17

FB1

6

PGND1

18

VCC

7

PGND1

19

SCL

8

PGND1

20

SDA

9

PGND2

21

10

SW2

22

N.C

11

PVCC2

23

PVCC1

12

EN

24

PVCC1

VQFN024V4040

(Unit:mm)

○FB Reference voltage

(initial)

*FB1,FB2 change after 10usec(max) pass

from setting the voltage by I2C interface

*The time of 1step for FB1,FB2(25mV shift)

take 5usec(max).

*The time that output voltage reaches the

setting value is 0.06msec(max).

SW

ADJ

R1

R2

○SETTING THE OUTPUT VOLTAGE

The Output Voltage is set by the external resistor divider and is calculated as：

It’ s possible to adjust the output voltage by R1 and R2.

(The Vout must be set from 1.0V to 3.3V.

To control I

Resistance R1≒10kΩ is recommended. Please confirm the ripple voltage, if you can use

the resistance more than 100kΩ.

Lot No.

9 1 3 6 2