XC9206 / 9207/ 9208 Series

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

XC9206A33CMR, XC9207A33CMR, XC9208A33CMR

VOUT=3.3V, FOSC=1.2MHz, Ta=25

VOUT=0V, When CE voltage is

(XC9206, XC9207)

Test condition : Unless otherwise stated, VIN = 5.0V

*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

CE=VIN, VOUT=0V,

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

-

-

VOUT

1.40

CONDITIONS

When connected to ext. components

500

(XC9208)

2.0

100

Maximum Duty Cycle

MAXDTY

1

Efficiency (*2)

EFFI

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

-

92

Minimum Duty Cycle

MINDTY

CE=VIN, VOUT=0V

Supply Current 1

IDD1

Operating Voltage Range

VIN

U.V.L.O Voltage

VUVLO

Maximum Output Current

IOUTMAX

Output Voltage

MAX

UNIT

CIRCUIT

MIN

PARAMETER

SYMBOL

TYP

Stand-by Current

Istb

IDD2

CE=VIN, VOUT=fixed voltage x 1.1V

Supply Current 2

Oscillation Frequency

FOSC

PFM pulse width rate

PFMDTY

mA

%

4

Lx SW ON Resistance

RLx

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

-

0.4

0.9

Ω

Current Limit

ILIM

4

CE "H" Voltage

VCEH

VPWMH

CE "L" Voltage

VCEL

VOUT=0V, When CE voltage is applied

Lx determine "L"

VPWML

PWM "H" Voltage

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.

ms

1

12.0

ms

-0.1

0.8

When connected to ext. components

CE=0V

! VIN, IOUT=1mA

-0.1

1

1

-

6.0

5

5

-

5

VIN-0.3

-

-

V

VSS

-

0.3

V

PWM "L" Voltage

0.1

CE "H" Current

ICEH

TSS

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

Soft start time

CE "L" Current

ICEL

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.

Latch Time

Tlat

VIN=CE=5.0V, short VOUT by 1

Ω resistance (*5)

-

6

-

When connected to ext. components

CE=VIN=5.5V, VOUT=0V

When connected to ext. components (XC9208 only)

(XC9206, 9207)

When connected to ext. components

VIN=CE=5.0V, VOUT=0V

applied Lx determine "H"

(XC9208)

V

1

CE=VIN, IOUT=30mA

6.0

When connected to ext. components

3.234

3.300

3.366

1.8

-

-mA

1

V

1

6.0

1.78

V

2

CE=VIN, VOUT=fixed voltage x 0.9V

-

370

585

µA

3

1.00

3

CE=VSS, VOUT=fixed voltage x 1.1V

-0

1

µA

3

-

120

1.200

1.380

MHz

180

µA

1

CE=VIN, IOUT=30mA

When connected to ext. components

26

32

38

%

1

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

1.020

%

2

CE=VOUT=VIN

-

-

0

%

2

-

-

600

-

5

0.9

-

VIN

1.2

-

VIN

V

When connected to ext. components (XC9208 only)

--

IOUT=1mA (*4)

IOUT=1mA (*4)

VIN-1.0

V

µA

-

0.1

µA

Semiconductor Ltd.

Data Sheet

7