XCM519AB03DR datasheet(8/49 Pages) TOREX

Part #	XCM519AB03DR

Description	600mA Synchronous Step-Down DC/DC Converter Low Voltage Input LDO

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Manufacturer	TOREX [Torex Semiconductor]

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XCM519 Series

■ELECTRICAL CHARACTERISTICS (Continued)

●

XCM519xD 1ch (DC/DC BLOCK)

DCOUT=1.8V, f

OSC=3.0MHz, Ta=25℃

Test conditions: Unless otherwise stated, VIN1=5.0V, VDCOUT(E)= Nominal voltage

NOTE:

*1: Including hysteresis width of operating voltage.

*2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100

*3: ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA

*4: Design value

*5: When temperature is high, a current of approximately 10μA (maximum) may leak.

*6: Time until it short-circuits DCOUT with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse

generating.

*7: VDCOUT (E)+1.2V<2.7V, VIN=2.7V.

*8: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

*9: Current limit denotes the level of detection at peak of coil current.

*10: "H"＝VIN∼VIN - 1.2V, "L"＝+ 0.1V ∼ - 0.1V

*11: XCM519A series exclude IPFM and DLIMT_PFM because those are only for the PFM control’s functions.

* The electrical characteristics above are when the other channel is in stop mode.

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNITS CIRCUIT

Output Voltage

VDCOUT

When connected to external components,

VIN1=VEN1=5.0V, IOUT1=30mA

1.764

1.800

1.836

V

①

Operating Voltage Range

VIN1

2.7

-

6.0

V

①

Maximum Output Current

IOUT1MAX

When connected to external components,

VIN1=DCOUT(E)V+2.0V,VEN1=1.0V

(*8)

600

-

mA

①

UVLO Voltage

VUVLO

VEN1=VIN1

，DCOUT=0V,

Voltage which Lx pin holding “L” level

(*1, *10)

1.00

1.40

1.78

V

②

(XCM519AD)

-

46

65

Supply Current

IDD

VIN1=VEN1=5.0V,DCOUT=DCOUT(E)×1.1V

(XCM519BD)

-

21

35

μA

③

Stand-by Current

ISTB

VIN1=5.0V,VEN1=0V, DCOUT=DCOUT(E)×1.1V

-

0

1.0

μA

③

Oscillation Frequency

fOSC

When connected to external components,

VIN1=DCOUT(E)V+2.0V, VEN1=1.0V, IOUT1=100mA

2550

3000

3450

kHz

①

PFM Switching Current

IPFM

When connected to external components,

VIN1=DCOUT(E)V+2.0V, VEN1=VIN1, IOUT1=1mA

(*11)

170

220

270

mA

①

PFM Duty Limit

DLIMIT_PFM

VEN1=VIN1=(C-1)IOUT1=1mA

(*11)

-

200

300

%

②

Maximum Duty Ratio

DMAX

VIN1=VEN1=5.0V, DCOUT=DCOUT(E)×0.9V

100

-

%

②

Minimum Duty Ratio

DMIN

VIN1=VEN1=5.0V, DCOUT=DCOUT(E)×1.1V

-

0

%

②

Efficiency

EFFI

When connected to external components,

VEN1=VIN1＝DCOUT(E)+1.2V

(*7),IOUT1=100mA

-

86

-

%

①

Lx SW "H" ON Resistance 1

RLXH

VIN1=VEN1=5.0V, DCOUT=0V, ILX=100mA

(*3)

-

0.35

0.55

Ω

④

Lx SW "H" ON Resistance 2

RLXH

VIN1=VEN1=3.6V, DCOUT=0V, ILX=100mA

(*3)

-

0.42

0.67

Ω

④

Lx SW "L" ON Resistance 1

RLXL

VIN1=VEN1=5.0V

(*4)

-

0.45

0.66

Ω

−

Lx SW "L" ON Resistance 2

RLXL

VIN1=VEN1=3.6V

(*4)

-

0.52

0.77

Ω

−

Lx SW "H" Leak Current

(*5)

ILEAKH

VIN1=DCOUT=5.0V,VEN1=0V, LX=0V

-

0.01

1.0

μA

⑨

Current Limit

(*9)

ILIM

VIN1=VEN1=5.0V, DCOUT=DCOUT(E)×0.9V

900

1050

1350

mA

⑥

Output Voltage

Temperature

Characteristics

△DCOUT /

(DCOUT・△topr)

IOUT1=30mA

-40℃≦Topr≦85℃

-

±100

-

ppm/℃

①

EN1 "H" Level Voltage

VEN1H

DCOUT=0V, Applied voltage to VEN1,

Voltage changes Lx to “H” level

(*10)

0.65

-

6.0

V

③

EN1 "L" Level Voltage

VEN1L

DCOUT=0V, Applied voltage to VEN1,

Voltage changes Lx to “L” level

(*10)

VSS

-

0.25

V

③

EN1 "H" Current

IEN1H

VIN1=VEN1=5.0V, DCOUT=0V

- 0.1

-

0.1

μA

⑤

EN1 "L" Current

IEN1L

VIN1=5.0V,VEN1=0V, DCOUT=0V

- 0.1

-

0.1

μA

⑤

Soft Start Time

tSS

When connected to external components,

VEN1=0V→VIN1, IOUT1=1mA

-

0.32

0.50

ms

①

Latch Time

tLAT

VIN1=VEN1=5.0V, DCOUT=0.8×DCOUT(E)

Short Lx at 1Ω resistance

(*6)

1.0

-

20

ms

⑦

Short Protection

Threshold Voltage

VSHORT

Sweeping DCOUT, VIN1=VEN1=5.0V, Short Lx at

1Ω resistance, DCOUT voltage which Lx becomes

“L” level within 1ms

0.675

0.900

1.150

V

⑦

CL Discharge

RDCHG

VIN1=5.0V, LX=5.0V, VEN1=0V, DCOUT=Open

200

300

450

Ω

⑧

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