XC9206 / 9207/ 9208 Series

PWM, PWM/PFM Switchable Step-Down DC/DC Converters with Driver Transistor Built-In

XC9206A18CMR, XC9207A18CMR, XC9208A18CMR

VOUT=1.8V, FOSC=1.2MHz, Ta=25

(XC9206, 9207)

(XC9208)

VOUT=0V, When CE voltage is

(XC9206, XC9207)

Test condition : Unless otherwise stated, VIN = 3.6V

*1

Including Hysteresis operating voltage range.

*2

EFFI = [ (Output Voltage x Output Current) / (Input Voltage x Input Current) ] x 100

*3

On resistance = VLx (measurement voltage) / 0.4

*4

*5

VCEL

CE "L" Voltage

Tlat

Latch Time

RLx

VCEH

ILIM

MAXDTY

MINDTY

EFFI

Supply Current 1

CE=VIN, VOUT=fixed voltage x 1.1V

CE=VSS, VOUT=fixed voltage x 1.1V

When connected to ext. components

FOSC

Istb

IDD1

IDD2

PFMDTY

SYMBOL

VUVLO

IOUTMAX

U.V.L.O Voltage

VIN

VOUT

PARAMETER

Output Voltage

Maximum Output Current

Operating Voltage Range

-0

%

-

600

-

-

0.4

0.9

%

%

1.8

-

6.0

500

-

255

413

-

V

µA

MHz

%

µA

UNIT

V

mA

1.764

1.800

1.836

-

2.0

-

6.0

CONDITIONS

1

V

VPWMH

VPWML

PWM "H" Voltage

PWM "L" Voltage

ICEL

-86

Oscillation Frequency

PFM pulse width rate

Supply Current 2

Stand-by Current

TSS

Soft start time

ICEH

Maximum Duty Cycle

Minimum Duty Cycle

CE "H" Current

CE "L" Current

Efficiency (*2)

Current Limit

CE "H" Voltage

Lx SW ON Resistance

µA

µA

Ω

mA

V

V

3

ms

ms

CIRCUIT

1

2

3

3

V

V

5

2

2

1

1

5

4

4

1

5

6

MAX

TYP

MIN

1

µA

1

1

5

1

1.00

1.40

1.78

24

30

36

1.020

1.200

1.380

1.2

-

VIN

0.9

-

VIN

VSS

-

0.3

VIN-0.3

-

-

-0.1

-

0.1

VIN-1.0

--

-

(XC9208)

VOUT=0V, When CE voltage is applied Lx determine "L"

When connected to ext. components, CE=VIN, IOUT=100mA

CE=VIN, VOUT=0V, ILx=400mA (*3)

VIN=CE=5.0V, VOUT=0V

applied Lx determine "H"

CE=VIN, IOUT=30mA

When connected to ext. components

(XC9207, XC9208 only), CE=VIN, IOUT=1mA

-

12.0

-0.1

-

0.1

0.8

-

6.0

-

98

158

1

CE=VIN, VOUT=0V

-

-0

100

-

IOUT=1mA (*4)

CE=VIN=5.5V, VOUT=0V

CE=0V, VIN=5.5V, VOUT=0V

When connected to ext. components

CE=0V

! VIN, IOUT=1mA

When connected to ext. components

VIN=CE=5.0V, short VOUT by 1

Ω resistance (*5)

CE=VOUT=VIN

When connected to ext. components (XC9208 only)

When connected to ext. components

CE=VIN, IOUT=30mA

IOUT=1mA (*4)

When connected to ext. components (XC9208 only)

When connected to ext. components

CE=VIN, VOUT=0V,

Voltage which Lx pin voltage holding "L" level (*1)

CE=VIN, VOUT=fixed voltage x 0.9V

The CE/MODE pin of the XC9208A series works also as an external PWM control and PWM/PFM control switching pin. When the IC is in

the operation, control is switched to the PWM mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3 V, and to the

automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0 V and equal to or greater

than VCEH.

Time until it short-circuits VOUT with GND through 1

Ω of resistance from a state of operation and is set to VOUT=0V from current limit pulse

generating.

Semiconductor Ltd.

Data Sheet

5