XCM520AB04DR-G datasheet(6/43 Pages) TOREX

Part #	XCM520AB04DR-G

Description	600mA Synchronous Step-Down DC/DC Converter Dual LDO Regulator

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Manufacturer	TOREX [Torex Semiconductor]

Direct Link	http://www.torex.co.jp

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XCM520 Series

●XCM520AA/AC (DC/DC BLOCK)

VOUT3 = 1.8V, fOSC= 3.0MHz, Ta=25℃

Test conditions: Unless otherwise stated, VIN2 = 5.0V, VOUT3 (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 VOUT3 with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse

generating.

*7: VOUT3 (E)+1.2V<2.7V, VIN2=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"＝VIN2∼VIN2 - 1.2V, "L"＝+ 0.1V ∼ - 0.1V

*11: XCM520AA series exclude IPFM and DTYLIMIT_PFM because those are only for the PFM control’s functions.

*The electrical characteristics above are when the voltage regulator block is in stop.

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNITS CIRCUIT

Output Voltage

VOUT3

When connected to external components,

VIN2 = VEN3 = 5.0V, IOUT3 = 30mA

1.764

1.800

1.836

V

①

Operating Voltage Range

VIN2

2.7

-

6.0

V

①

Maximum Output Current

IOUT3MAX

When connected to external components,

VIN2=VOUT3(E)+2.0V, VEN3=1.0V

(*8)

600

-

mA

①

UVLO Voltage

VUVLO

VEN3 = VIN2 , VOUT3 = 0V ,

Voltage which Lx pin holding “L” level

(*1, *10)

1.00

1.40

1.78

V

②

XCM520AA

-

46

65

Supply Current

IDD

VIN2=VEN3=5.0V,

VOUT3=VOUT3(E)×1.1V

XCM520AC

21

35

μA

③

Stand-by Current

ISTB

VIN2 = 5.0V, VEN = 0V, VOUT3 = VOUT3(E) × 1.1V

-

0

1.0

μA

③

Oscillation Frequency

fOSC

When connected to external components,

VIN2 = VOUT3(E) + 2.0V , VEN3=1.0V, VOUT3 = 100mA

2550

3000

3450

kHz

①

PFM Switching Current

IPFM

When connected to external components,

VIN2 = VOUT3(E) + 2.0V, VEN3 = VIN2 , IOUT3 = 1mA

(*11)

170

220

270

mA

①

PFM Duty Limit

DTYLIMIT_PFM

VEN3 = VIN2 = (C-1) IOUT3 = 1mA

(*11)

200

300

%

②

Maximum Duty Ratio

DMAX

VIN2 = VEN3 = 5.0V, VOUT3 = VOUT3 (E) × 0.9V

100

-

%

②

Minimum Duty Ratio

DMIN

VIN2 = VEN3 = 5.0V, VOUT3 = VOUT3 (E) × 1.1V

-

0

%

②

Efficiency

(*2)

EFFI

When connected to external components,

VEN3 = VIN2 ＝ VOUT3 (E) + 1.2V, VOUT3 = 100mA

(*7)

-

86

-

%

①

Lx SW "H" ON Resistance 1

RL

ｘH

VIN2 = VEN3 = 5.0V, VOUT3 = 0V, ILX = 100mA

(*3)

-

0.35

0.55

Ω

④

Lx SW "H" ON Resistance 2

RL

ｘH

VIN2 = VEN3 = 3.6V, VOUT3 = 0V, ILX = 100mA

(*3)

-

0.42

0.67

Ω

④

Lx SW "L" ON Resistance 1

RL

ｘL

VIN2 = VEN3 =5.0V

(*4)

-

0.45

0.66

Ω

−

Lx SW "L" ON Resistance 2

RL

ｘL

VIN2 = VEN3 = 3.6V

(*4)

-

0.52

0.77

Ω

−

Lx SW "H" Leak Current

(*5)

ILEAKH

VIN2 = VOUT3 = 5.0V, VEN3 = 0V, LX= 0V

-

0.01

1.0

μA

⑤

Lx SW "L" Leak Current

(*5)

ILEAKL

VIN2 = VOUT3 = 5.0V, VEN3 = 0V, LX= 5.0V

-

0.01

1.0

μA

⑤

Current Limit

(*9)

ILIM

VIN2 = VEN3 = 5.0V, VOUT3 = VOUT3 (E) × 0.9V

900

1050

1350

mA

⑥

Output Voltage

Temperature

Characteristics

△VOUT3/

(VOUT3・△topr)

VOUT3 = 30mA

-40℃ ≦ Topr ≦ 85℃

-

±100

-

ppm/ ℃

①

EN "H" Level Voltage

VENH

VOUT3 =0V, Applied voltage to VEN3,

Voltage changes Lx to “H” level

(*10)

0.65

-

6.0

V

③

EN "L" Level Voltage

VEN3L

VOUT3 =0V, Applied voltage to VEN3,

Voltage changes Lx to “L” level

(*10)

VSS

-

0.25

V

③

EN "H" Current

IEN3H

VIN2 = VEN3 =5.0V, VOUT3 = 0V

- 0.1

0.1

μA

⑤

EN "L" Current

IEN3L

VIN2 =5.0V, VEN3 = 0V, VOUT3 = 0V

- 0.1

-

0.1

μA

⑤

Soft Start Time

tSS

When connected to external components,

VEN3 = 0V → VIN2 , VOUT3 = 1mA

0.5

0.9

2.5

ms

①

Integral Latch Time

tLAT

VIN2 = VEN3 = 5.0V, VOUT3 = 0.8 × VOUT3 (E)

Short Lx at 1Ω resistance

(*6)

1.0

-

20.0

ms

⑦

Short Protection

Threshold Voltage

VSHORT

Sweeping VOUT3, VIN2 = VEN3 = 5.0V, Short Lx at

1Ω resistance, VOUT3 voltage which Lx becomes “L”

level within 1ms

0.675

0.900

1.125

V

⑦

■ELECTRICAL CHARACTERISTICS (Continued)

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