Product Specification
IXD2110/IXD2111
Step-Up DC/DC Converter / Controller
FEATURES
Operating Input Voltage Range:
0.9V ~ 10.0V
Output Voltage Range:
1.5V~7.0V with (0.1V
increments, accuracy ±2.5%)
Maximum Oscillation Frequency:
100 kHz
(180kHz for the IXD2111)
Built-in Switching NMOSFET (A/C/E
type) or
External Transistor (B/D/F
type)
Low Operating Supply Current:
2.0μA
Small Package:
SOT-23 & SOT89 (for IXD2111
series),SOT-25, USP-6C 8-pin 2 x 3 x 0.8 mm
TDFN package
step-up operation by using only an inductor, a
capacitor, and a diode connected externally.
The IXD2110/111B, D, and F versions can be used
with an external transistor for applications requiring
larger currents.
Output voltage is internally programmed in a range
from 1.5V to 7.0V in increments of 0.1V (accuracy
± 2.5%).
Maximum oscillation frequency is set to 100 kHz for
IXD2110/111 series. (At light loads, it is set to
180 kHz for the IXD2111 series.)
Options include products equipped with a CE pin (C
and D versions) that allows the IC to be shut down,
thereby reducing supply current, and with separated
V
DD
/V
OUT
pins (E and F versions) to separate the
power supply block and the output voltage detect
block.
With the IXD2110 series, maximum duty cycle is set
to 75% (V
DD
= 3.3 V) making it suitable for use with
large current operations. The IXD2111 series
automatically switches duty ratio between 56% &
75% (V
DD
= 3.3 V) to drop output ripple voltage, when
it senses changes in load, It can support both large
and small currents.
The external transistor types (B/D/F types) are
designed for applications that require larger currents.
APPLICATION
Mobile phones
Cameras, VCRs
Various portable equipment
DESCRIPTION
The IXD2110/IXD2111 series is a group of PFM step-
up DC/DC converter/controller ICs, designed to
generate low supply voltage. This series is ideal for
applications where a longer battery life is needed,
such as in portable communication equipment. With a
built-in 2.5 Ω N-channel driver transistor, the
IXD2110A/C/E and IXD2111A/C/E types provide a
TYPICAL APPLICATION CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTIC
PS036001-0615
PRELIMINARY
1
Product Specification
IXD2110/IXD1211
ABSOLUTE MAXIMUM RATINGS
PARAMETER
V
OUT
Voltage
Lx Pin Voltage
Lx Pin Current
EXT Pin Voltage
EXT Pin Current
CE Input Voltage
VDD Input Voltage
SOT-23, 25
Power Dissipation
SOT-89
USP-6C
Operating Temperature Range
Storage Temperature Range
T
OPR
T
STG
P
D
SYMBOL
V
OUT
V
Lx
I
Lx
V
EXT
I
EXT
V
CE
V
DD
RATINGS
– 0.3 ~ 12.0
– 0.3 ~ 12.0
400
V
SS
– 0.3 ~ V
OUT
+ 0.3
100
– 0.3 ~ 12.0
– 0.3 ~ 12.0
250
500
100
– 40 ~ + 85
– 55 ~ +125
0
0
UNITS
V
V
mA
V
mA
V
V
mW
C
C
ELECTRICAL OPERATING CHARACTERISTICS
IXD2111Axx1MR
PARAMETER
Output Voltage
Output Voltage Temperature
Characteristics
Maximum Input Voltage
Operating Start Voltage
Oscillation Start Voltage
Operating Hold Voltage
Input Current at No Load
Supply Current 1 (*2)
Supply Current 2
Lx Switch ON Resistance
Lx Leak Current
Duty Ratio
Duty Ratio 2
Maximum Oscillation
Frequency
Maximum Oscillation
Frequency 2
Lx Limit Voltage (
*
4)
Efficiency (
*
5)
SYMBOL
V
OUT
CONDITIONS
Connected to external components
Connected to external components
- 40
0
C ≤ Topr ≤ 85
0
C
I
OUT
= 1 mA,
Connected to external components
Applied 0.8 V to V
OUT
, Vpull = 1.0 V
I
OUT
= 1 mA,
Connected to external components
I
OUT
= 0 mA (
*
1)
Applied (output voltage x0.95) to V
OUT
Applied (output voltage + 0.5) to V
OUT
Same as I
D D 1
, V
Lx
= 0.4 V ( 3)
Same as I
DD2
, V
Lx
= 7 V
Same as I
DD1
, measure Lx waveform
I
OUT
= 1 mA, measure Lx ON time.
Connect to external components
Same as I
D D 1
Same as I
DD1
Same as I
DD1
, V
Lx
when max oscillation
frequency is more than double
Connect to external components
*
Ta = 25
0
C
MIN.
x 0.975
TYP.
V
OUT
± 100
10
-
-
0.7
-
-
-
-
-
E7-1(
*
)
48
85
153
0.7
-
-
0.8
-
-
E1-1(
*
)
E2-1( )
E3-1( )
E4-1( )
-
E7-2(
*
)
56
100
180
-
E8(
*
)
*
*
*
MAX.
x 1.025
UNIT
V
ppm/
0
C
CIRCUIT
V
IN
V
ST1
V
ST2
V
HLD
I
IN
I
DD1
I
DD2
R
SWON
I
LxL
DTY
DTY2
MAXf
OSC
MAXf
OSC2
V
LxLMT
EFFI
-
0.9
0.8
-
E1-2(
*
)
E2-2( )
E3-2( )
E4-2( )
1
E7-3(
*
)
64
115
207
1.1
-
*
*
*
V
V
V
V
µA
µA
µA
Ω
µA
%
%
kHz
kHz
V
%
Test condition: Unless otherwise specified, V
IN
= V
OUT
× 0.6, I
OUT
≤ C1 (*), Vpull = 5.0 V
NOTE:
*1: XBS104S14R-G is used, reverse current I
R
< 1µA (when reverse voltage V
R
= 10 V is applied), in case of using selected parts.
*2: Supply Current 1 is the value when the IC is constantly switching. In actual operation, the oscillator periodically switches, resulting in lower
power consumption. Please refer to Input Current (I
IN
) under no load condition for the actual current, which is supplied from the input power
supply (V
IN
).
*3: Lx switch ON resistance can be calculated by (V
Lx
x Rp) / (Vpull - V
Lx
). * Change Vpull so that V
Lx
will become 0.4 V.
*4: The Lx limit voltage function becomes stable when V
OUT
is over 2.0 V.
*5: EFFI = {[output voltage] × (output current)} / [(input voltage) × (input current)] ×100
*6: Please be aware of the absolute maximum ratings of the external components.
(*): Please refer to the charts.
PS036001-0615
PRELIMINARY
2
Product Specification
IXD2110/IXD1211
ELECTRICAL OPERATING CHARACTERISTICS (Continued)
I X D 2 1 1 1 Bxx1MR
PARAMETER
Output Voltage
Output Voltage Temperature
Characteristics
Maximum Input Voltage
Operating Start Voltage
Oscillation Start Voltage
Operating Hold Voltage
Supply Current 1 (*1)
Supply Current 2
EXT “H” ON Resistance
EXT “L” ON Resistance
Duty Ratio
Duty Ratio 2
Maximum Oscillation
Frequency
Maximum Oscillation
Frequency 2
Lx Limit Voltage (
*
4)
Efficiency (
*
5)
SYMBOL
V
OUT
CONDITIONS
Connected to external components
Connected to external components
- 40
0
C ≤ Topr ≤ 85
0
C
I
OUT
= 1 mA,
Connected to external components
Applied 0.8 V to V
OUT
I
OUT
= 1 mA,
Connected to external components
Applied (output voltage x0.95) to V
OUT
Applied (output voltage + 0.5) to V
OUT
Same as I
D D 1
, V
EXT
= VOUT - 0.4 V (
*
2)
Same as I
DD1
, V
EXT
= 0.4 V (*3)
Same as I
DD1
, measure Lx waveform
I
OUT
= 1 mA, measure Lx ON time.
Connect to external components
Same as I
D D 1
Same as I
DD1
Same as I
DD1
, V
Lx
when max oscillation
frequency is more than double
Connect to external components
MIN.
x 0.975
TYP.
V
OUT
± 100
10
-
-
0.7
-
-
-
-
E7-1( )
48
85
153
0.7
-
*
Ta = 25
0
C
MAX.
x 1.025
UNIT
V
ppm/
0
C
-
0.9
0.8
-
E2-2(
*
)
E3-2( )
E5-2(
*
)
E6-2( )
E7-3( )
64
115
207
1.1
-
*
*
*
*
CIRCUIT
V
IN
V
ST1
V
ST2
V
HLD
I
DD1
I
DD2
R
EXTH
R
EXTL
DTY
DTY2
MAXf
OSC
MAXf
OSC2
V
LxLMT
EFFI
-
0.8
-
-
E2-1(
*
)
E3-1( )
E5-1(
*
)
E6-1( )
E7-2( )
56
100
180
-
E9(
*
)
*
*
V
V
V
V
µA
µA
Ω
Ω
%
%
kHz
kHz
V
%
Test condition: Unless otherwise specified, V
IN
= V
OUT
× 0.6, I
OUT
≤ C1 (*)
NOTE:
*1: Supply Current 1 is the value when the IC is constantly switching. In actual operation, the oscillator periodically switches, resulting in lower
power consumption.
*2: EXT ‘H’ ON resistance can be calculated by (0.4 x Rp) / (VEXT – Vpull). * Change Vpull so that V
EXT
will become V
OUT
- 0.4 V.
*3: EXT ‘L’ ON resistance can be calculated by (V
EXT
x Rp) / (Vpull - V
EXT
). * Change Vpull so that V
EXT
will become 0.4 V.
*4: EFFI = {[output voltage] × (output current)} / [(input voltage) × (input current)] ×100
*5: Please be aware of the absolute maximum ratings of the external components.
(*): Please refer to the charts.
PS036001-0615
PRELIMINARY
3
Product Specification
IXD2110/IXD1211
ELECTRICAL OPERATING CHARACTERISTICS (Continued)
I X D 2 1 1 0 Cxx1MR, I X D2 1 1 1 Cxx1MR
PARAMETER
Output Voltage
Output Voltage Temperature
Characteristics
Maximum Input Voltage
Operating Start Voltage
Oscillation Start Voltage
Operating Hold Voltage
Input Current at No Load
Supply Current 1 (*2)
Supply Current 2
Lx Switch ON Resistance
Lx Leak Current
Duty Ratio
Duty Ratio 2
Maximum Oscillation
Frequency
Maximum Oscillation
Frequency 2
Lx Limit Voltage (
*
4)
Efficiency (
*
5)
Standby Current
CE “High” Voltage
CE “Low” Voltage
CE “High” Current
CE “Low” Current
SYMBOL
V
OUT
CONDITIONS
Connected to external components
Connected to external components
- 40
0
C ≤ Topr ≤ 85
0
C
I
OUT
= 1 mA,
Connected to external components
Applied 0.8 V to V
OUT
, Vpull = 1.0 V
I
OUT
= 1 mA,
Connected to external components
I
OUT
= 0 mA (
*
1)
Applied (output voltage x0.95) to V
OUT
Applied (output voltage + 0.5) to V
OUT
Same as I
D D 1
, V
Lx
= 0.4 V ( 3)
Same as I
DD2
, V
Lx
= 7 V
Same as I
DD1
, measure Lx waveform
I
OUT
= 1 mA, measure Lx ON time.
Connect to external components
Same as I
D D 1
Same as I
DD1
Same as I
DD1
, V
Lx
when max oscillation
frequency is more than double
Connect to external components
Same as I
DD1
, V
CE
= 0 V
Same as I
DD1
, determine Lx oscillation
Same as I
DD1
, determine Lx shutdown
Same as I
DD1
, V
CE
= V
OUT
x 0.95
Same as I
DD1
, V
CE
= 0 V
0.75
0.20
0.25
-0.25
*
Ta = 25
0
C
MIN.
x 0.975
TYP.
V
OUT
± 100
10
-
-
0.7
-
-
-
-
-
E7-1( )
48
85
153
0.7
-
*
MAX.
x 1.025
UNIT
V
ppm/
0
C
CIRCUIT
V
IN
V
ST1
V
ST2
V
HLD
I
IN
I
DD1
I
DD2
R
SWON
I
LxL
DTY
DTY2
MAXf
OSC
MAXf
OSC2
V
LxLMT
EFFI
I
STB
V
CEH
V
CEL
I
CEH
I
CEL
-
0.8
-
-
E1-1(
*
)
E2-1( )
E3-1( )
E4-1( )
-
E7-2( )
56
100
180
-
E8(
*
)
*
*
*
*
-
0.9
0.8
-
E1-2(
*
)
E2-2( )
E3-2( )
E4-2( )
1
E7-3( )
64
115
207
1.1
-
0.50
*
*
*
*
V
V
V
V
µA
µA
µA
Ω
µA
%
%
kHz
kHz
V
%
µA
V
V
µA
µA
Test condition: Unless otherwise specified, connect CE to V
OUT
, V
IN
=V
OUT
× 0.6, I
OUT
≤ C1 (*), Vpull = 5.0 V
NOTE:
*1: XBS104S14R-G is used, reverse current I
R
< 1 µA (when reverse voltage V
R
= 10 V is applied), in case of using selected parts.
*2: Supply Current 1 is the value when the IC is constantly switching. In actual operation, the oscillator periodically switches, resulting in lower
power consumption. Please refer to Input Current (I
IN
) under no load condition for the actual current, which is supplied from the input power
supply (V
IN
).
*3: Lx switch ON resistance can be calculated by (V
Lx
x Rp) / (Vpull - VLx). * Change Vpull so that V
Lx
will become 0.4 V.
*4: The Lx. limit voltage function becomes stable when V
OUT
of the IXD2110/111 series is over 2.0 V.
*5: EFFI = {[output voltage] × (output current)} / [(input voltage) × (input current)] ×100
*6: Please be aware of the absolute maximum ratings of the external components.
(*): Please refer to the charts.
PS036001-0615
PRELIMINARY
4
Product Specification
IXD2110/IXD1211
ELECTRICAL OPERATING CHARACTERISTICS (Continued)
I X D 2 1 1 0 Dxx1MR, I X D2 1 1 1 Dxx1MR
PARAMETER
Output Voltage
Output Voltage Temperature
Characteristics
Maximum Input Voltage
Operating Start Voltage
Oscillation Start Voltage
Operating Hold Voltage
Supply Current 1 (*1)
Supply Current 2
EXT “H” ON Resistance
EXT “L” ON Resistance
Duty Ratio
Duty Ratio 2
Maximum Oscillation
Frequency
Maximum Oscillation
Frequency 2
Efficiency (
*
5)
Standby Current
CE “High” Voltage
CE “Low” Voltage
CE “High” Current
CE “Low” Current
SYMBOL
V
OUT
CONDITIONS
Connected to external components
Connected to external components
- 40
0
C ≤ Topr ≤ 85
0
C
I
OUT
= 1 mA,
Connected to external components
Applied 0.8 V to V
OUT
I
OUT
= 1 mA,
Connected to external components
Applied (output voltage x0.95) to V
OUT
Applied (output voltage + 0.5) to V
OUT
Same as I
D D 1
, V
EXT
= VOUT - 0.4 V (
*
2)
Same as I
DD1
, V
EXT
= 0.4 V (*3)
Same as I
DD1
, measure Lx waveform
I
OUT
= 1 mA, measure Lx ON time.
Connect to external components
Same as I
D D 1
Same as I
DD1
Connect to external components
Same as I
DD1
, V
CE
= 0 V
Same as I
DD1
, determine Lx oscillation
Same as I
DD1
, determine Lx shutdown
Same as I
DD1
, V
CE
= V
OUT
x 0.95
Same as I
DD1
, V
CE
= 0 V
0.75
0.20
0.25
-0.25
MIN.
x 0.975
TYP.
V
OUT
± 100
10
-
-
0.7
-
-
-
-
E7-1( )
48
85
153
-
*
Ta = 25
0
C
MAX.
x 1.025
UNIT
V
ppm/
0
C
-
0.9
0.8
-
E2-2(
*
)
E3-2( )
E5-2(
*
)
E6-2( )
E7-3( )
64
115
207
-
0.50
*
*
*
*
CIRCUIT
V
IN
V
ST1
V
ST2
V
HLD
I
DD1
I
DD2
R
EXTH
R
EXTL
DTY
DTY2
MAXf
OSC
MAXf
OSC2
EFFI
I
STB
V
CEH
V
CEL
I
CEH
I
CEL
-
0.8
-
-
E2-1(
*
)
E3-1( )
E5-1(
*
)
E6-1( )
E7-2( )
56
100
180
E9(
*
)
*
*
V
V
V
V
µA
µA
Ω
Ω
%
%
kHz
kHz
%
µA
V
V
µA
µA
Test condition: Unless otherwise specified, connect CE to V
OUT
, V
IN
=V
OUT
× 0.6, I
OUT
≤ C1 (*)
NOTE:
*1: "Supply Current 1" is the value when the IC is constantly switching. In actual operation, the oscillator periodically switches, resulting in lower
power consumption.
*2: EXT “H” ON resistance can be calculated by (0.4 x Rp) / (V
EXT
- Vpull). * Change Vpull so that V
EXT
will become V
OUT
- 0.4 V.
*3: EXT “L” ON resistance can be calculated by (V
EXT
x Rp) / (Vpull - V
EXT
). * Change Vpull so that V
EXT
will become 0.4 V.
*4: EFFI = {[output voltage] × (output current)} / [(input voltage) × (input current)] ×100
*5: Please be aware of the absolute maximum ratings of the external components.
(*): Please refer to the charts.
PS036001-0615
PRELIMINARY
5
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