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XC9128/XC9129 Series
XC9128/XC9129 Series
Topr=25
o
C
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX.
UNITS CIRCUIT
Input Voltage VIN - - - 6.0 V -
FB Voltage VFB
V
OUT
=V
IN
=3.3V, V
FO
=0V
(*8)
Voltage to start oscillation during
V
FB
= 0.46V → 0.44V
0.44 0.45 0.46 V ④
Output Voltage Setting Range VOUTSET - 1.8 - 5.3 V ①
Connect to external components,
R
L
=1kΩ
- - 0.8 V ①
Operation Start Voltage VST1
Connect to external components,
R
L
=33Ω
- - 0.9
(*1)
V ①
Oscillation Start Voltage VST2
Voltage to start oscillation during
V
IN
=0V → 1V, R
L
=1kΩ
- 0.8 - V ①
Operation Hold Voltage VHLD
Connect to external components, R
L
=1kΩ
- 0.7 - V ①
Supply Current 1 IDD1 V
IN
= V
OUT
=3.3V, V
FB
=0.45V×0.9 - 3 6 mA ②
Supply Current 2 (XC9128) - 30 80
Supply Current 2 (XC9129)
IDD2
V
IN
= V
OUT
=3.3V
V
FB
=0.45V×1.1 (Oscillation stop),
V
MODE
=0V
- 28 78
μA ②
Input Pin Current I
BAT
V
IN
=3.3V, V
OUT
=1.8V, V
EN
=0V - 2 10 μA ③
Stand-by Current I
STB
V
IN
= V
OUT
=3.3V, V
EN
=0V - 2 10 μA ②
Oscillation Frequency f
OSC
V
IN
= V
OUT
=3.3V, V
FO
=0V
(*8)
,
V
FB
=0.45V
×0.9
1.02 1.20 1.38 MHz ④
Maximum Duty Cycle
MAXDTY
V
IN
= V
OUT
=3.3V, V
FO
=0V
(*8)
,
V
FB
=0.45V×0.9
85 92 96 % ④
Minimum Duty Cycle
MINDTY
V
IN
= V
OUT
=3.3V, V
FO
=0V
(*8)
,
V
FB
=0.45V×1.1
- - 0 % ④
PFM Switching Current IPFM
Connect to external components,
V
MODE
=0V, R
L
=330Ω
- 250 400 mA ①
Efficiency
(*2)
EFFI
Connect to external components,
R
L
=33Ω
- 93 - % ①
LX SW "Pch" ON Resistance RLxP
V
IN
=V
Lx
=V
OUT
+50mV,
V
FB
=0.45V×1.1
(*3)
- 0.20
0.35
(*1)
Ω ⑤
LX SW "Nch" ON Resistance RLxN V
IN
=V
OUT
=3.3V, Lx =50mV
(*4)
-
0.20
(*1)
0.35
(*1)
Ω ⑦
LX Leak Current ILXL V
IN
=V
OUT
= V
LX
, V
FB
=0V - 1 - μA ⑤
Current Limit
(*5)
ILIM V
OUT
>2.5V 1.2 1.5 2.0 A ①
Integral Latch Time (XC9128)
(*6)
Time to stop oscillation during
R
L
=33Ω → 3.3Ω, V
FO
=L → H
Integral Latch Time (XC9129)
(*6)
tLAT
Time to stop oscillation during
R
L
=33Ω → 3.3Ω
- 3.5 - ms ①
Soft-Start Time 1 tSS1
Time to start oscillation during
V
EN
=0V
→ V
IN
at V
IN
= V
OUT
=3.3V, V
FO
=0V,
V
FB
=0.45V×0.95
1.7 5.3 10.5 ms ④
Soft-Start Time 2
(*7)
tSS2
V
IN
= V
OUT
=3.3V, V
FO
=0V,
V
FB
=0.45V×0.95
Time to start oscillation during
V
AEN/
=V
IN
→0V.
- 0.02 0.04 ms ④
Soft-Start Time 3
(*7)
tSS3
V
IN
= V
OUT
=3.3V, V
FO
=0V,
V
FB
=0.45V×0.8
Time to start oscillation during
V
AEN/
=V
IN
→0V
1.7 5.3 10.5 ms ④
Thermal Shutdown
Temperature
T
TSD - - 150 -
o
C -
Hysteresis Width THYS - - 20 -
o
C -
Output Voltage Drop
Protection
(*6)
V
LVP
V
IN
=3.3V
Voltage to stop oscillation during
V
OUT
=1.56V→1.3V
1.3 1.48 1.56 V ⑥
FO Output Current
(*7)
IFO_OUT
V
IN
=V
OUT
=3.3V, V
FO
=0.25V 1.3 1.7 2.2 mA ④
FO Leakage Current
(*7)
IFO_Leak V
IN
= V
OUT
=3.3V, V
EN
=0V ,V
FO
=1V - 0 1 μA ④
■ELECTRICAL CHARACTERISTICS
