Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator In Series plus Voltage Detector

Preliminary

XC9510HxxCSx

$ Common Characteristics

$ DC/DC Converter (2.2V product)

$ Regulator (1.8V product)

-

VDD-1.2

V

3

CE 'M' Level Voltage

VCEM

-

-

±100

-

IROUT=30mA

-40

Short-Circuit Current

-

IROUT=30mA

-

-

dB

VROUT(T)+1V<VIN<6V

VROUT=VROT(E)x0.9

Connected to the external components,

VIN=CE=5.0V,

Short DCOUT by 1

Ω resistor

-8

1.800

-

1.764

IROUT=30mA

TEST CIRCUIT

UNITS

3

3

-

Temperature Characteristics

Output Voltage

! VOUT

-

±100

IDOUT=30mA

-40

Efficiency (note 4)

Stand-by Current (note 1)

ISTB

Supply Current 2

Supply Current 1

PARAMETER

SYMBOL

CE 'H' Level Voltage

VCEH

VIN

VUVLO

U.V.L.O. Voltage (note 2)

CE 'H' Level Current

ICEH

! VOUT

PARAMETER

Output Voltage

SYMBOL

CE 'L' Level Current

ICEL

ILIM1

Current Limit

Current Limit

Line Regulation

ILIM2

Output Voltage

VROUT(E)

Maximum Output Current

IMAX2

Dropout Voltage 2

Vdif 2

DCOUT

XC9510 Series

VIN=6.5V, CE=0V

TEST CIRCUIT

2.156

30

-

-

0.6

1.78

1.00

85

-

mV

2

15

50

mV

2

-mA

600

-

0.2

-

%/V

2

-

Load Regulation

! VROUT

Dropout Voltage 1 (note 6)

Vdif 1

-

1mA<IROUT<100mA

IROUT=30mA

IROUT=100mA

Soft Start Time

TSS

-

PARAMETER

SYMBOL

MIN.

Connected to the external components,

CE=0V

"VIN, IDOUT=1mA

Latch Time (note 5)

Tlat

CONDITIONS

EFFI

3

Maximum Output Current

IMAX1

800

%

Connected to the external components,

IDOUT=100mA

6

A

LX SW 'Low' On Resistance

RLXL

-

LX SW 'High' On Resistance

(note 3)

RLXH

-

Ω

DCOUT=0V, LX=VIN-0.05V

0.5

3

1.20

1.38

MHz

-

-

4

3

4

0

3

MAXDUTY

1.02

FOSC

DCOUT=0V

100

PFM Duty Ratio

CONDITIONS

Minimum Duty Ratio

MINDUTY

Oscillation Frequency

Maximum Duty Ratio

PFMDUTY

Input Voltage Range

VIN=CE=DCOUT=5.0V

%

-

Connected to the external components,

No Load

DCOUT=VIN

-

-

0.5

-

-

--

1.2

-

-

TYP.

MAX.

-90-

-

5

1.836

200

2

Output Voltage

5

3

ppm

/

ISHORT

-

30

VROUT=VSS

-60

ppm

/

Temperature Characteristics

PSRR

! VOUT

-

VIN={VOUT(T) + 1.0} VDC + 0.5Vp-pAC

IROUT=30mA, f=1kHz

Ripple Rejection Rate

MAX.

V

3

mA

2

mS

Ta=25

-

300

-

µΑ

1

V

6.0

1

2.4

TYP.

IDD2

µΑ

-

0.6

2.5

VIN=CE=5.0V, DCOUT=0V

MIN.

IDD1

-

240

--

-

µΑ

1

3

V

1.40

V

3

VDD

-

CE 'L' Level Voltage

VCEL

VSS

-

0.25

µΑ

1

- 0.1

-

0.1

21

- 0.1

-

0.1

38

30

MIN.

2

Ta=25

mA

3

mV

7

7

2

2

mS

CONDITIONS

Connected to the external components,

IDOUT=10mA

TYP.

MAX.

2.200

2.244

UNITS

-%

V

V

mA

%

Ω

µΑ

Ta=25

Connected to the external components,

IDOUT=30mA

1

Semiconductor Ltd.

Data Sheet

4