! Electrical Characteristics

XC9502B095

Common Characteristics

(FOSC=500kHz)

Ta=25

VOUT1

VOUT2

VOUT1

VOUT2

Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V

Output 1 Characteristics

Step-up Controller

Ta=25

Using Tr: 2SD1628,

Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V

Output 2 Characteristics

Step-down Controller

Ta=25

Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V

Notes

1)

2)

3)

4)

Although the IC's step-up operations start from a VDD of 0.8V, the output voltage and switching frequency are stabilized at VDD

≥

2.0V. Therefore, a VDD of more than 2.0V is recommended when VDD is supplied from VIN or other power sources.

Although the IC's switching operations start from a VIN of 0.9V, the IC's power supply pin (VDD) and output voltage monitor pin

(FB1) should be connected to VOUT1. With operations from VIN=0.9V, the 2nd channel's (output 2) EN2 pin should be set to chip

disable. Once ouput voltage VOUT1 is more than 2.0V, the EN2 pin should be set to chip enable.

Please be careful not to exceed the breakdown voltage level of the peripheral parts.

EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100

-

0.20

V

8

PWM2 "Low" Voltage

VPWML2

No Load

-

--

V

8

PWM2 "High" Voltage

VPWMH2

No Load

0.65

22

30

Ω

6

EXT2 "Low" ON Resistance

REXTBL2 FB2=0V, EXT2=0.4V

-

28

47

Ω

6

EXT2 "High" ON Resistance

REXTBH2 EN2=0, EXT2=VDD-0.4V

-

10.0

20.0

mS

8

Soft-Start Time2

TSS2

VOUT2

× 0.95V, EN2=0V→0.65V

5.0

91

-

%

8

Efficiency2

EFFI2

IOUT2=250mA

-

P-ch MOSFET : XP162A12A6P

30

38

%

8

PFM Duty Ratio2

PFMDTY2 No Load, VPWM2=0V

22

-0

%

3

Minimum Duty Ratio2

MINDTY2 Same as IDD2

-

--

%

3

Maximum Duty Ratio2

MAXDTY2 Same as IDD1

100

-

2.0

V

1

Minimum Operation Voltage

VINmin

-

0.900

0.918

V

7

FB2 Voltage

VFB2

VIN=3.0V, IOUT2=10mA

0.882

TYP.

MAX.

UNITS

TEST

CIRCUIT

PARAMETER

SYMBOL

CONDITIONS

MIN.

-

0.20

V

5

PWM1 "Low" Voltage

VPWML1

No Load

-

--

V

5

PWM1 "High" Voltage

VPWMH1

No Load

0.65

22

30

Ω

6

EXT1 "Low" ON Resistance

REXTBL1 EN1=FB2=0V, EXT1=0.4V

-

28

47

Ω

6

EXT1 "High" ON Resistance

REXTBH1 FB1=0, EXT1=VDD-0.4V

-

10.0

20.0

mS

5

Soft-Start Time1

TSS1

VOUT1

× 0.95V, EN1=0V→0.65V

5.0

83

-

%

5

Efficiency1 (note 4)

EFFI1

IOUT=130mA

-

N-ch MOSFET:XP161A1355P

30

38

%

5

PFM Duty Ratio1

PFMDTY1 No Load, VPWM1=0V

22

-0

%

3

Minimum Duty Ratio1

MINDTY1 Same as IDD2

-

3

Maximum Duty Ratio1

MAXDTY1 Same as IDD1

75

80

85

%

3

2.0

V

1

Oscillation Start-up Voltage1

VST2-1

FB1=0V

-

-

0.8

V

0.9

V

2

IOUT1=1.0mA, RFB11=200k

Ω, RFB12=75kΩ

Operation Start-up Voltage1

(note 2)

VST1-1

--

VDD

≠ VOUT1: IOUT1=1mA

--

0.900

0.918

V

4

FB1 Voltage

VFB1

VDD=3.0V, VIN=1.5V, IOUT1=10mA

0.882

TYP.

MAX.

UNITS

TEST

CIRCUIT

PARAMETER

SYMBOL

CONDITIONS

MIN.

-

-0.50

µA

3

FB1,2 "Low" Current

VFBL

FB1, 2=1.0V

-

-

0.50

µA

3

FB1,2 "High" Current

IFBH

FB1, 2=3.0V

-

-

-0.50

µA

3

PWM1,2 "Low" Current

IPWML

FB1, 2=3.0V, PWM=0V

-

-

0.50

µA

3

PWM1,2 "High" Current

IPWMH

FB1, 2=3.0V, PWM=3.0V

-

-

-0.50

µA

3

EN1,2 "Low" Current

IENL

EN1,2=0V, FB1,2=3.0V

-

-

0.50

µA

3

EN1,2 "High" Current

IENH

EN1,2=3.0V

-

-

0.20

V

3

EN1,2 "Low" Voltage

VENL

FB1,2=0V

-

--

V

3

EN1,2 "High" Voltage

VENH

FB1,2=0V

0.65

500

575

kHz

3

Switching Frequency

FOSC

Same as IDD1

425

1.0

3.0

µA

3

Stand-by Current

ISTB

Same as IDD1, EN1=EN2=0V

-

90

190

µA

3

Supply Current 2

IDD2

FB1, 2=1.0V

-

90

190

µA

3

Supply Current 1-4

IDD1-4

FB1=1.0V, FB2=0V

-

130

240

µA

3

Supply Current 1-3

IDD1-3

FB1=0V, FB2=1.0V

-

80

150

µA

3

Supply Current 1-2

IDD1-2

EN2=3.0V, EN1=0V, FB2=0V

-

110

220

µA

3

Supply Current 1-1

IDD1-1

EN1=3.0V, EN2=0V, FB1=0V

-

130

250

µA

3

Supply Current 1

IDD1

FB1, 2=0V

-

-

10.0

V

2

-

VIN

V

--

V

1

-

VIN

V

Output Voltage Range

(note 3)

VOUTSET

VDD

≥ 2.0V, IOUT1, 2=1mA

VDD

≠VOUT1

0.9

0.9

VIN

≥ 0.9V, IOUT1, 2=1mA

VDD=VOUT1

2.0

0.9

--

V

1

Max. Input Voltage

VIN

10.0

-

10.0

V

1

Supply Voltage (note 1)

VDD

2.0

XC9502 Series

2ch. Step-up / down DC/DC Controller ICs

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNITS

TEST

CIRCUIT

6