XCM520 Datasheet, PDF (6/43 Pages) Torex Semiconductor – 600mA Synchronous Step-Down DC/DC Converter + Dual LDO Regulator

XCM520 Series
ç_{˙ELECTRICAL CHARACTERISTICS (Continued)}
˔XCM520AA/AC (DC/DC BLOCK)
V_OUT3 = 1.8V, f_OSC= 3.0MHz, Ta=25℃
PARAMETER
SYMBOL
CONDITIONS
MIN. TYP. MAX. UNITS CIRCUIT
Output Voltage
Operating Voltage Range
V_OUT3
V_IN2
When connected to external components,
V_IN2 = V_EN3 = 5.0V, I_OUT3 = 30mA
1.764 1.800 1.836 V
ᶃ
2.7
-
6.0
V
ᶃ
Maximum Output Current
UVLO Voltage
I_OUT3MAX
V_UVLO
When connected to external components,
V_IN2=V_OUT3(E)+2.0V, V_EN3=1.0V ^(*8)
V_EN3 = V_IN2 , V_OUT3 = 0V ,
Voltage which Lx pin holding “L” level ^{(*1, *10)}
600
-
-
mA
ᶃ
1.00 1.40 1.78
V
ᶄ
Supply Current
I_DD
V_IN2=V_EN3=5.0V,
V_OUT3=V_OUT3(E)Ê·1.1V
XCM520AA -
XCM520AC
46
65
ЖA
ᶅ
21
35
Stand-by Current
I_STB
V_IN2 = 5.0V, V_EN = 0V, V_OUT3 = V_OUT3(E) Ê· 1.1V
-
0
1.0 ЖA
ᶅ
Oscillation Frequency
f_OSC
When connected to external components,
V_IN2 = V_OUT3(E) + 2.0V , V_EN3=1.0V, V_OUT3 = 100mA
2550 3000 3450 kHz
ᶃ
PFM Switching Current
PFM Duty Limit
I_PFM
DTY_{LIMIT_PFM}
When connected to external components,
V_IN2 = V_OUT3(E) + 2.0V, V_EN3 = V_IN2 , I_OUT3 = 1mA ^(*11)
V_EN3 = V_IN2 = (C-1) I_OUT3 = 1mA ^(*11)
170 220 270 mA
ᶃ
200 300
%
ᶄ
Maximum Duty Ratio
D_MAX
V_IN2 = V_EN3 = 5.0V, V_OUT3 = V_{OUT3 (E)} Ê· 0.9V
100
-
-
%
ᶄ
Minimum Duty Ratio
Efficiency ^(*2)
D_MIN
EFFI
Lx SW "H" ON Resistance 1
Lx SW "H" ON Resistance 2
Lx SW "L" ON Resistance 1
Lx SW "L" ON Resistance 2
Lx SW "H" Leak Current ^(*5)
Lx SW "L" Leak Current ^(*5)
Current Limit ^(*9)
Output Voltage
Temperature
Characteristics
R_L͇H
R_L͇H
R_L͇L
R_L͇L
I_LEAKH
I_LEAKL
I_LIM
˚V_OUT3/
(V_OUT3ɾ˚topr)
EN "H" Level Voltage
V_ENH
EN "L" Level Voltage
V_EN3L
V_IN2 = V_EN3 = 5.0V, V_OUT3 = V_{OUT3 (E)} Ê· 1.1V
When connected to external components,
V_EN3 = V_IN2 ʹ V_{OUT3 (E)} + 1.2V, V_OUT3 = 100mA ^(*7)
V_IN2 = V_EN3 = 5.0V, V_OUT3 = 0V, IL_X = 100mA ^(*3)
V_IN2 = V_EN3 = 3.6V, V_OUT3 = 0V, IL_X = 100mA ^(*3)
V_IN2 = V_EN3 =5.0V ^(*4)
V_IN2 = V_EN3 = 3.6V ^(*4)
V_IN2 = V_OUT3 = 5.0V, V_EN3 = 0V, L_X= 0V
V_IN2 = V_OUT3 = 5.0V, V_EN3 = 0V, L_X= 5.0V
V_IN2 = V_EN3 = 5.0V, V_OUT3 = V_{OUT3 (E)} Ê· 0.9V
V_OUT3 = 30mA
-40ˆ ʽ Topr ʽ 85ˆ
V_OUT3 =0V, Applied voltage to V_EN3,
Voltage changes Lx to “H” level ^(*10)
V_OUT3 =0V, Applied voltage to V_EN3,
Voltage changes Lx to “L” level ^(*10)
-
-
0
%
ᶄ
-
86
-
%
ᶃ
-
0.35 0.55
Њ
ᶆ
-
0.42 0.67
Њ
ᶆ
-
0.45 0.66
Њ
ʵ
-
0.52 0.77
Њ
ʵ
-
0.01 1.0 ЖA
ᶇ
-
0.01 1.0 ЖA
ᶇ
900 1050 1350 mA
ᶈ
- ʶ100 - ppm/ ˆ ᶃ
0.65
-
6.0
V
ᶅ
V_SS
-
0.25
V
ᶅ
EN "H" Current
I_EN3H
V_IN2 = V_EN3 =5.0V, V_OUT3 = 0V
- 0.1
0.1 ЖA
ᶇ
EN "L" Current
Soft Start Time
Integral Latch Time
Short Protection
Threshold Voltage
I_EN3L
V_IN2 =5.0V, V_EN3 = 0V, V_OUT3 = 0V
- 0.1
-
0.1 ЖA
ᶇ
t_SS
When connected to external components,
V_EN3 = 0V Ë  V_IN2 , V_OUT3 = 1mA
0.5
0.9
2.5
ms
ᶃ
t_LAT
V_IN2 = V_EN3 = 5.0V, V_OUT3 = 0.8 Ê· V_{OUT3 (E)}
Short Lx at 1Ω resistance ^(*6)
1.0
-
20.0 ms
ᶉ
Sweeping V_OUT3, V_IN2 = V_EN3 = 5.0V, Short Lx at
V_SHORT
1Ω resistance, V_OUT3 voltage which Lx becomes “L” 0.675 0.900 1.125 V
ᶉ
level within 1ms
Test conditions: Unless otherwise stated, V_IN2 = 5.0V, V_{OUT3 (E)} = Nominal voltage
NOTE:
*1: Including hysteresis width of operating voltage.
*2: EFFI = { ( output voltageʷoutput current ) öç( input voltageʷinput current) }ʷ100
*3: ON resistance (Њ)= (V_IN - Lx pin measurement voltage) öç100mA
*4: Design value
*5: When temperature is high, a current of approximately 10ЖA (maximum) may leak.
*6: Time until it short-circuits V_OUT3 with GND via 1Њof resistor from an operational state and is set to Lx=0V from current limit pulse
generating.
*7: V_{OUT3 (E)}+1.2V<2.7V, V_IN2=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"ʹV_IN2ʙV_IN2 - 1.2V, "L"ʹ+ 0.1V ʙ - 0.1V
*11: XCM520AA series exclude I_PFM and DTY_{LIMIT_PFM} because those are only for the PFM control’s functions.
*The electrical characteristics above are when the voltage regulator block is in stop.
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