XC9272
Series
■GENERAL
DESCRIPTION
ETR05057-001
Ultra Low Quiescent Current Synchronous Step-Down PFM DC/DC Converter for Low Output Voltage
☆GreenOperation
compatible
XC9272 series are Ultra Low Quiescent Current synchronous-rectification for Low Output Voltage type PFM step down DC/DC
converters with a built-in 0.4Ω (TYP.) Pch driver and 0.4Ω (TYP.) Nch synchronous switching transistor, designed to allow the
use of ceramic capacitor.
PFM control enables a low quiescent current, making these products ideal for battery operated devices that require high
efficiency and long battery life.
Only inductor, C
IN
and C
L
capacitors are needed as external parts to make a step down DC/DC circuit.
Operation voltage range is from 2.0V to 6.0V. This product has fixed output voltage from 0.6V to 0.95V(accuracy:
±20mV)
in
increments of 0.05V.
During stand-by, all circuits are shutdown to reduce consumption to as low as 0.1μA(TYP.) or less.
With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF when
input voltage gets lower than UVLO detection voltage. Besides, XC9272 series has UVLO release voltage of 1.8V (Typ.).
The product with C
L
discharge function, XC9272B type, can discharge C
L
capacitor during stand-by mode due to the internal
resistance by turning on the internal switch between V
OUT
-GND. This enables output voltage restored to GND level fast.
■APPLICATIONS
●
●
●
●
●
Electric devices with GPS
Wearable devices
Energy Harvest devices
Backup power supply circuits
Devices with 1 Lithium cell
■FEATURES
Input Voltage Range
Output Voltage Setting
Output Current
Driver Transistor
Supply Current
Control Method
High Speed Transient
PFM Switching Current
Function
:
:
:
:
:
:
:
:
:
2.0V~6.0V
0.6V~0.95V (±20mV, 0.05V step increments)
50mA
0.4Ω (Pch Driver Tr)
0.4Ω (Nch Synchronous rectifier Switch Tr)
0.50μA @ V
OUT(T)
=0.7V (TYP.)
PFM control
50mV (V
IN
=3.6V, V
OUT
=0.7V, I
OUT
=10μA→50mA)
180mA
Short Protection function
C
L
Discharge(XC9272B type)
UVLO function
Ceramic Capacitor Compatible
Operation Ambient Temperature
Package
Environmentally Friendly
:
:
:
-40½+85℃
SOT-25, USP-6EL
EU RoHS compliant, Pb Free
■TYPICAL
APPLICATION CIRCUIT
■TYPICAL
PERFORMANCE
CHARACTERISTICS
●Efficiency
vs. Output Current
XC9272A071xR-G(V
OUT
=0.7V)
L=10μH(VLF302512M-100M),C
IN
=10μF(LMK107BJ106MA),
C
L
=22μF(JMK107BJ226MA)
V
IN
L
V
IN
L
X
100
V
OUT
V
IN
=2.0V
C
IN
(Ceramic)
CE
GND
V
OUT
C
L
(Ceramic)
Ef f iciency : EFFI (%)
80
60
V
IN
=3.6V
40
20
0
0.01
0.1
1
10
100
Output Current : I
OUT
(mA)
1/23
XC9272
Series
■
BLOCK DIAGRAM
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
XC9272A type does not have C
L
Discharge function.
■PRODUCT
CLASSIFICATION
●Ordering
information
XC9272①②③④⑤⑥-⑦
DESIGNATOR
①
②③
④
⑤⑥-⑦
(*1)
(*1)
ITEM
Product Type
Output Voltage
Output Voltage Type
Packages (Order Unit)
SYMBOL
A
B
06
½
09
1
B
4R-G
MR-G
Without C
L
Discharge
With C
L
Discharge
DESCRIPTION
Output Voltage : e.g. V
OUT
=0.7V⇒②=0,
③=7
Output Voltage Range: 0.6V½0.95V (0.05V step)
Output Voltage {x.x0V} (the 2nd decimal place is “0”)
Output Voltage {x.x5V} (the 2nd decimal place is “5”)
USP-6EL (3,000pcs/Reel)
SOT-25 (3,000pcs/Reel)
The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
2/23
XC9140
(Design Target)
■PIN
CONFIGURATION
L
X
5
V
OUT
4
XC9272
Series
V
IN
6
NC 5
CE 4
1
V
IN
2
GND
3
CE
1 L
X
2 GND
3 V
OUT
SOT-25
(TOP VIEW)
USP-6EL
(BOTTOM VIEW)
* The dissipation pad for the USP-6EL package should be solder-plated in
reference mount pattern and metal masking so as to enhance mounting
strength and heat release.
The mount pattern should be connected to GND pin (No.2).
■PIN
ASSIGNMENT
PIN NUMBER
USP-6EL
1
2
3
4
5
6
SOT-25
5
2
4
3
-
1
PIN NAME
L
X
GND
V
OUT
CE
NC
V
IN
FUNCTIONS
Switching
Ground
Output Voltage
Chip Enable
No Connection
Power Input
■
CE PIN FUNCTION
PIN NAME
CE
SIGNAL
H
L
STATUS
Operation (All Series)
Standby (All Series)
* Please do not leave the CE pin open.
■ABSOLUTE
MAXIMUM RATINGS
Ta=25˚C
PARAMETER
V
IN
Pin Voltage
L
X
Pin Voltage
V
OUT
Pin Voltage
CE Pin Voltage
L
X
Pin Current
Power Dissipation
SOT-25
USP-6EL
SYMBOL
V
IN
V
LX
V
OUT
V
CE
I
LX
Pd
Topr
Tstg
RATINGS
-0.3 ~ +7.0
-0.3 ~ V
IN
+0.3 or +7.0
-0.3 ~ +7.0
1000
250
120
-40 ~ +85
-55 ~ +125
(*1)
UNITS
V
V
V
V
mA
mW
˚C
˚C
-0.3 ~ V
IN
+0.3 or +7.0
(*1)
Operating Ambient Temperature
Storage Temperature
* All voltages are described based on the GND.
(*1)
The maximum value is the lower of either V
IN
+ 0.3 or +7.0.
3/23
XC9272
Series
■ELECTRICAL
CHARACTERISTICS
●XC9272A
Type, without C
L
discharge function
PARAMETER
Input Voltage
Output Voltage
SYMBOL
V
IN
V
OUT(E) (*2)
-
Resistor connected with L
X
pin.
Voltage which L
X
pin changes “L” to “H” level
while V
OUT
is decreasing.
V
CE
=V
IN
, V
OUT
=0V. Resistor connected with L
X
pin.
UVLO Release Voltage
V
UVLO(E)
Voltage which L
X
pin changes “L” to “H” level
while V
IN
is increasing.
V
CE
=V
IN
, V
OUT
=0V. Resistor connected with L
X
pin.
UVLO Hysteresis Voltage
V
HYS(E)
V
UVLO(E)
- Voltage which L
X
pin changes “H” to “L”
level while V
IN
is decreasing.
Supply Current
Standby Current
L
X
SW “H” Leak Current
L
X
SW “L” Leak Current
PFM Switching Current
Efficiency
(*3)
LX SW “Pch”
ON Resistance
(*4)
LX SW “Nch”
ON Resistance
Output Voltage
Temperature
Characteristics
CE “High” Voltage
Iq
I
STB
I
LEAKH
I
LEAKL
I
PFM
EFFI
R
LXP
R
LXN
Δ
OUT
/
V
(V
OUT
・Δ
Topr)
V
IN
=V
CE
=2.0V, V
OUT
=V
OUT(T)
+0.5V
(*1)
, L
X
=Open.
V
IN
=5.0V, V
CE
=V
OUT
=0V, L
X
=Open.
V
IN
=5.0V, V
CE
=V
OUT
=0V, V
LX
=0V.
V
IN
=5.0V, V
CE
=V
OUT
=0V, V
LX
=5.0V.
V
IN
=V
CE
=V
OUT(T)
+2.0V
(*1)
, I
OUT
=10mA.
V
IN
=V
CE
=3.6V,
V
OUT(T)
=0.7V
(*1)
, I
OUT
=30mA.
V
IN
=V
CE
=5.0V, V
OUT
=0V, I
LX
=50mA.
V
IN
=V
CE
=5.0V.
-
-
-
-
115
-
-
-
0.5
0.1
0.1
0.1
180
85
0.4
0.4
(*5)
0.8
1.0
1.0
1.0
250
-
0.65
-
μA
μA
μA
μA
mA
%
Ω
Ω
③
③
③
③
①
①
④
-
0.1
0.15
0.23
V
②
1.65
1.8
1.95
V
②
E1
V
②
CONDITIONS
MIN.
2.0
TYP.
-
MAX.
6.0
UNITS
V
Ta=25˚C
CIRCUIT
①
-40℃≦Topr≦85℃.
V
OUT
=0V. Resistor connected with L
X
pin.
-
±100
-
ppm/℃
②
V
CEH
Voltage which L
X
pin changes “L” to “H” level while
V
CE
=0.2→1.5V.
V
OUT
=0V. Resistor connected with L
X
pin.
1.2
-
6.0
V
⑤
CE “Low” Voltage
CE “High” Current
CE “Low” Current
Short Protection
Threshold Voltage
V
CEL
I
CEH
I
CEL
V
SHORT
Voltage which L
X
pin changes “H” to “L” level while
V
CE
=1.5→0.2V.
V
IN
=V
CE
=5.0V, V
OUT
=0V, L
X
=Open.
V
IN
=5.0V, V
CE
=V
OUT
=0V, L
X
=Open.
Resistor connected with L
X
pin.
Voltage which L
X
pin changes “H” to “L” level while
V
OUT
= V
OUT(T)
+0.1V→0V
(*1)
.
GND
-0.1
-0.1
0.14
-
-
-
0.3
0.3
0.1
0.1
0.48
V
μA
μA
V
⑤
⑤
⑤
②
Unless otherwise stated, V
IN
=V
CE
=5.0V
(*1)
(*2)
V
OUT(T)
=Nominal Output Voltage
V
OUT(E)
=Effective Output Voltage
The actual output voltage value V
OUT(E)
is the PFM comparator threshold voltage in the IC.
Therefore, the DC/DC circuit output voltage, including the peripheral components, is boosted by the ripple voltage average value.
Please refer to the characteristic example.
(*3)
EFFI=[{ (Output Voltage)×(Output Current)] / [(Input Voltage)×(Input Current)}]×100
(*4)
LX SW “Pch” ON resistance = (V
IN
– V
LX
pin measurement voltage) / 50mA
(*5) )
Designed value
4/23
XC9140
(Design Target)
■ELECTRICAL
CHARACTERISTICS (Continued)
●XC9272B
Type, with C
L
discharge function
PARAMETER
Input Voltage
Output Voltage
SYMBOL
V
IN
V
OUT(E) (*2)
-
Resistor connected with L
X
pin.
Voltage which L
X
pin changes “L” to “H” level
while V
OUT
is decreasing.
V
CE
=V
IN
, V
OUT
=0V. Resistor connected with L
X
pin.
UVLO Release Voltage
V
UVLO(E)
Voltage which L
X
pin changes “L” to “H” level
while V
IN
is increasing.
V
CE
=V
IN
, V
OUT
=0V. Resistor connected with L
X
pin.
UVLO Hysteresis Voltage
V
HYS(E)
V
UVLO(E)
- Voltage which L
X
pin changes “H” to “L”
level while V
IN
is decreasing.
Supply Current
Standby Current
L
X
SW “H” Leak Current
L
X
SW “L” Leak Current
PFM Switching Current
Efficiency
(*3)
LX SW “Pch”
ON Resistance
(*4)
LX SW “Nch”
ON Resistance
Output Voltage
Temperature
Characteristics
CE “High” Voltage
Iq
I
STB
I
LEAKH
I
LEAKL
I
PFM
EFFI
R
LXP
R
LXN
Δ
OUT
/
V
(V
OUT
・Δ
Topr)
V
IN
=V
CE
=2.0V, V
OUT
=V
OUT(T)
+0.5V
(*1)
, L
X
=Open.
V
IN
=5.0V, V
CE
=V
OUT
=0V, L
X
=Open.
V
IN
=5.0V, V
CE
=V
OUT
=0V, V
LX
=0V.
V
IN
=5.0V, V
CE
=V
OUT
=0V, V
LX
=5.0V.
V
IN
=V
CE
=V
OUT(T)
+2.0V
(*1)
, I
OUT
=10mA.
V
IN
=V
CE
=3.6V,
V
OUT(T)
=0.7V
(*1)
, I
OUT
=30mA.
V
IN
=V
CE
=5.0V, V
OUT
=0V, I
LX
=50mA.
V
IN
=V
CE
=5.0V.
-
-
-
-
115
-
-
-
0.5
0.1
0.1
0.1
180
85
0.4
0.4
(*5)
0.8
1.0
1.0
1.0
250
-
0.65
-
0.1
0.15
0.23
1.65
1.8
1.95
E1
CONDITIONS
MIN.
2.0
TYP.
-
MAX.
6.0
XC9272
Series
UNITS
V
V
CIRCUIT
①
②
V
②
V
②
μA
μA
μA
μA
mA
%
Ω
Ω
③
③
③
③
①
①
④
-
-40℃≦Topr≦85℃.
V
OUT
=0V. Resistor connected with L
X
pin.
-
±100
-
ppm/℃
②
V
CEH
Voltage which L
X
pin changes “L” to “H” level while
V
CE
=0.2→1.5V.
V
OUT
=0V. Resistor connected with L
X
pin.
1.2
-
6.0
V
⑤
CE “Low” Voltage
CE “High” Current
CE “Low” Current
Short Protection
Threshold Voltage
C
L
Discharge
(*1)
(*2)
V
CEL
I
CEH
I
CEL
V
SHORT
R
DCHG
Voltage which L
X
pin changes “H” to “L” level while
V
CE
=1.5→0.2V.
V
IN
=V
CE
=5.0V, V
OUT
=0V, L
X
=Open.
V
IN
=5.0V, V
CE
=V
OUT
=0V, L
X
=Open.
Resistor connected with L
X
pin.
Voltage which L
X
pin changes “H” to “L” level while
V
OUT
= V
OUT(T)
+0.1V→0V
(*1)
.
V
IN
=V
OUT
=5.0V, V
CE
=0V, L
X
=Open.
GND
-0.1
-0.1
0.14
55
-
-
-
0.3
80
0.3
0.1
0.1
0.48
105
V
μA
μA
V
Ω
⑤
⑤
⑤
②
③
Unless otherwise stated, V
IN
=V
CE
=5.0V
V
OUT(T)
=Nominal Output Voltage
V
OUT(E)
=Effective Output Voltage
The actual output voltage value V
OUT(E)
is the PFM comparator threshold voltage in the IC.
Therefore, the DC/DC circuit output voltage, including the peripheral components, is boosted by the ripple voltage average value.
Please refer to the characteristic example.
(*3)
(*4)
(*5)
EFFI=[{ (Output Voltage)×(Output Current)] / [(Input Voltage)×(Input Current)}]×100
LX SW “Pch” ON resistance = (V
IN
– V
LX
pin measurement voltage) / 50mA
Designed value
5/23
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