elm95 series

ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
■General description
ELM95xxxxE is CMOS PWM step-up DC/DC converter which consists of reference voltage source, error
amplifier, oscillation circuit, start-up circuit, PWM control circuit, switching current limit circuit, switch
transistor and output voltage setting resistor. For external parts, coil, diode and capacitor are possible choices;
with external parts, are 2.7V, 3.0V, 3.3V and 5.0V; ELM95 series can also be designed as semi-custom IC within
the range of 2.5V to 5.5V by 0.1V step. With newly-developed PWM control circuit, ELM95 series is able to
modulate switching time smoothly with constant frequency and consequently generates stable output with small
ripples.There are two switching frequency and maximum duty ratio available:(Switching frequency, Maximum
duty ratio)=(55kHz, 60%) and (100kHz, 77%).
■Features
•
•
•
•
•
•
•
•
•
Output voltage range
Low voltage operation
Low power operation
High efficiency
High output voltage accuracy
Constant switching frequency
Output current (e.g.)
Small ripples
Package
: 2.5V to 5.5V(by 0.1V step)
: Vin≥0.9V(No load)
: 35µW(ELM9530AxE)
: Typ.85%
: ±2.5%
: Typ.55kHz(Type A), Typ.100kHz(Type B)
: 100mA(Type B, Vin=1.5V, Vout=3.3V)
: Ceramic capacitor can be used for output capacitor.
: SOT-89, SOT-23
■Application
•
•
•
•
Constant voltage source for battery-operated devices
Constant voltage source for cameras
Portable communication equipments
Local regulator
■Maximum absolute ratings
Parameter
Apply voltage to LX pin
Apply voltage to VOUT pin
Output current of LX pin
Power dissipation
Operating temperature
Storage temperature
Symbol
Vlx
Vout
Ilx
Limit
Vss-0.3 to 8.0
Vss-0.3 to 8.0
500
500 (SOT-89)
250 (SOT-23)
-40 to +85
-55 to +125
Pd
Top
Tstg
Unit
V
V
mA
mW
°C
°C
Rev.1.2
15 - 1
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
■Selection guide
ELM95xxxxE-x
Symbol
a, b
e.g.:
27: Vout=2.7V,
33: Vout=3.3V,
Output voltage
30: Vout=3.0V
50: Vout=5.0V
A : Switching frequency=55kHz,
Maximum duty ratio=60%
Switching frequency
and maximum duty ratio B : Switching frequency=100kHz,
Maximum duty ratio=77%
c
d
Package
e
Product version
f
Taping direction
ELM95 x x x x E - x
↑ ↑ ↑ ↑ ↑ ↑
a b c d e f
A : SOT-89
B : SOT-23
E
S: Refer to PKG file
N: Refer to PKG file
■Pin configuration
SOT-89(TOP VIEW)
SOT-23(TOP VIEW)
Pin No.
1
2
3
Pin No.
1
2
3
Pin name
VSS
VOUT
LX
Pin name
VSS
LX
VOUT
■Standard circuit
ELM95xxAxE
ELM95xxBxE
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Ceramic capacitors are recommended.
Rev.1.2
15 - 2
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
■Block diagram
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■Electrical characteristics (ELM95xxAxE)
Vout=2.7V(ELM9527AxE)
L=220μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C
Condition
Min. Typ. Max. Unit
0.9
7.0
V
No load
0.9
V
Iout=1mA
0.7
V
Vin=1.5V, Iout=1mA
9
18
µA
Vin=1.5V, Iout=1mA
2.633 2.700 2.767
V
Vout=Vout(T)×0.95
0.65
1.20
Ω
Vout=Vlx=7.0V
1.0
µA
Vout=Vout(T)×0.95
35
55
75
kHz
Vout=Vout(T)×0.95
45
60
75
%
Vout=Vout(T)×0.95
600
mA
Parameter
Input voltage
Starting voltage
Holding voltage
Current consumption
Output voltage
On-resistance of LX switch
Leakage current of LX pin
Oscillating frequency
Maximum duty ratio
Current limit of LX switch
Symbol
Vin
Vst
Vhold
Iss
Vout
Ron
Ilxl
Fosc
Duty
llimit
Vout=3.0V(ELM9530AxE)
L=220μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C
Symbol
Condition
Min. Typ. Max. Unit
Vin
0.9
7.0
V
Vst
No load
0.9
V
Vhold Iout=1mA
0.7
V
Iss
Vin=1.5V, Iout=1mA
12
20
µA
Vout Vin=1.5V, Iout=1mA
2.925 3.000 3.075
V
Ron Vout=Vout(T)×0.95
0.6
1.1
Ω
Ilxl
Vout=Vlx=7.0V
1.0
µA
Fosc Vout=Vout(T)×0.95
35
55
75
kHz
Duty Vout=Vout(T)×0.95
45
60
75
%
llimit Vout=Vout(T)×0.95
600
mA
Parameter
Input voltage
Starting voltage
Holding voltage
Current consumption
Output voltage
On-resistance of LX switch
Leakage current of LX pin
Oscillating frequency
Maximum duty ratio
Current limit of LX switch
* Vout(T) : Typ. value of Vout
* Vout(T) : Typ. value of Vout
Rev.1.2
15 - 3
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
Vout=3.3V(ELM9533AxE)
Parameter
Input voltage
Starting voltage
Holding voltage
Current consumption
Output voltage
On-resistance of LX switch
Leakage current of LX pin
Oscillating frequency
Maximum duty ratio
Current limit of LX switch
Vout=5.0V(ELM9550AxE)
Parameter
Input voltage
Starting voltage
Holding voltage
Current consumption
Output voltage
On-resistance of LX switch
Leakage current of LX pin
Oscillating frequency
Maximum duty ratio
Current limit of LX switch
L=220μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C
Symbol
Condition
Min. Typ. Max. Unit
Vin
0.9
7.0
V
Vst
No load
0.9
V
Vhold Iout=1mA
0.7
V
Iss
Vin=1.5V, Iout=1mA
14
23
µA
Vout Vin=1.5V, Iout=1mA
3.218 3.300 3.382
V
Ron Vout=Vout(T)×0.95
0.55
1.00
Ω
Ilxl
Vout=Vlx=7.0V
1.0
µA
Fosc Vout=Vout(T)×0.95
35
55
75
kHz
Duty Vout=Vout(T)×0.95
45
60
75
%
llimit Vout=Vout(T)×0.95
600
mA
* Vout(T) : Typ. value of Vout
Symbol
Vin
Vst
Vhold
Iss
Vout
Ron
Ilxl
Fosc
Duty
llimit
L=220μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C
Condition
Min. Typ. Max. Unit
0.9
7.0
V
No load
0.9
V
Iout=1mA
0.7
V
Vin=3.0V, Iout=1mA
30
45
µA
Vin=3.0V, Iout=1mA
4.875 5.000 5.125
V
Vout=Vout(T)×0.95
0.45
0.80
Ω
Vout=Vlx=7.0V
1.0
µA
Vout=Vout(T)×0.95
35
55
75
kHz
Vout=Vout(T)×0.95
45
60
75
%
Vout=Vout(T)×0.95
600
mA
* Vout(T) : Typ. value of Vout
■Electrical characteristics (ELM95xxBxE)
Vout=2.7V(ELM9527BxE)
Parameter
Input voltage
Starting voltage
Holding voltage
Current consumption
Output voltage
On-resistance of LX switch
Leakage current of LX pin
Oscillating frequency
Maximum duty ratio
Current limit of LX switch
Symbol
Vin
Vst
Vhold
Iss
Vout
Ron
Ilxl
Fosc
Duty
llimit
L=100μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C
Condition
Min. Typ. Max. Unit
0.9
7.0
V
No load
0.9
V
Iout=1mA
0.7
V
Vin=1.5V, Iout=1mA
15
30
µA
Vin=1.5V, Iout=1mA
2.633 2.700 2.767
V
Vout=Vout(T)×0.95
0.6
1.1
Ω
Vout=Vlx=7.0V
1.0
µA
Vout=Vout(T)×0.95
80
100
120
kHz
Vout=Vout(T)×0.95
70
77
85
%
Vout=Vout(T)×0.95
600
mA
* Vout(T) : Typ. value of Vout
Rev.1.2
15 - 4
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
Vout=3.0V(ELM9530BxE)
Parameter
Input voltage
Starting voltage
Holding voltage
Current consumption
Output voltage
On-resistance of LX switch
Leakage current of LX pin
Oscillating frequency
Maximum duty ratio
Current limit of LX switch
Vout=3.3V(ELM9533BxE)
Parameter
Input voltage
Starting voltage
Holding voltage
Current consumption
Output voltage
On-resistance of LX switch
Leakage current of LX pin
Oscillating frequency
Maximum duty ratio
Current limit of LX switch
Vout=5.0V(ELM9550BxE)
Parameter
Input voltage
Starting voltage
Holding voltage
Current consumption
Output voltage
On-resistance of LX switch
Leakage current of LX pin
Oscillating frequency
Maximum duty ratio
Current limit of LX switch
L=100μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C
Symbol
Condition
Min. Typ. Max. Unit
Vin
0.9
7.0
V
Vst
No load
0.9
V
Vhold Iout=1mA
0.7
V
Iss
Vin=1.5V, Iout=1mA
18
32
µA
Vout Vin=1.5V, Iout=1mA
2.925 3.000 3.075
V
Ron Vout=Vout(T)×0.95
0.6
1.1
Ω
Ilxl
Vout=Vlx=7.0V
1.0
µA
Fosc Vout=Vout(T)×0.95
80
100
120
kHz
Duty Vout=Vout(T)×0.95
70
77
85
%
llimit Vout=Vout(T)×0.95
600
mA
* Vout(T) : Typ. value of Vout
L=100μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C
Symbol
Condition
Min. Typ. Max. Unit
Vin
0.9
7.0
V
Vst
No load
0.9
V
Vhold Iout=1mA
0.7
V
Iss
Vin=1.5V, Iout=1mA
20
35
µA
Vout Vin=1.5V, Iout=1mA
3.218 3.300 3.382
V
Ron Vout=Vout(T)×0.95
0.55
1.00
Ω
Ilxl
Vout=Vlx=7.0V
1.0
µA
Fosc Vout=Vout(T)×0.95
80
100
120
kHz
Duty Vout=Vout(T)×0.95
70
77
85
%
llimit Vout=Vout(T)×0.95
600
mA
* Vout(T) : Typ. value of Vout
Symbol
Vin
Vst
Vhold
Iss
Vout
Ron
Ilxl
Fosc
Duty
llimit
L=100μH, Cin=Cout=47μF, D=DB2J208, Vss=0V, Top=25°C
Condition
Min. Typ. Max. Unit
0.9
7.0
V
No load
0.9
V
Iout=1mA
0.7
V
Vin=3.0V, Iout=1mA
35
55
µA
Vin=3.0V, Iout=1mA
4.875 5.000 5.125
V
Vout=Vout(T)×0.95
0.45
0.80
Ω
Vout=Vlx=7.0V
1.0
µA
Vout=Vout(T)×0.95
80
100
120
kHz
Vout=Vout(T)×0.95
70
77
85
%
Vout=Vout(T)×0.95
600
mA
* Vout(T) : Typ. value of Vout
Rev.1.2
15 - 5
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
■Marking
SOT-89
SOT-23
a, b : Represents Output voltage range and Package type
and Switching frequency type
Output voltage range
Symbol
Package
Switching frequency
(V)
5P
2.5~3.0
SOT-89
55kHz
5Q
2.5~3.0
SOT-89
100kHz
5R
3.1~5.5
SOT-89
55kHz
5S
3.1~5.5
SOT-89
100kHz
5T
2.5~3.0
SOT-23
55kHz
5U
2.5~3.0
SOT-23
100kHz
5V
3.1~5.5
SOT-23
55kHz
5W
3.1~5.5
SOT-23
100kHz
c : Represents Output voltage.
Symbol
1
2
3
4
5
6
7
8
9
0
A
B
C
D
E
Output voltage(V)
Symbol
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
F
G
H
J
K
L
M
N
P
Q
R
S
T
U
V
Output voltage(V)
2.5
2.6
2.7
2.8
2.9
3.0
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
d : Represents the assembly lot number
1~0, A~Z repeated (I,O,X excepted)
Rev.1.2
15 - 6
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
■External parts
To design DC/DC converter using ELM95 series, coil, diode, and capacitor are necessary.
(Refer to the standard circuit configuration.)
1) Coil
When choosing choke coil, please select that whose core is not magnetically saturated, DC resistance is low,
and which has sufficient margin for rated current. ELM recommends to use inductance around 220µH for
ELM995xxAxE, and ELM95xxBxE. For ELM95 series, ELM recommends following coil.
• SLF7045T (TDK corporation)
2) Diode
When choosing diode, please select that whose forward voltage is small, switching speed is high and which
has sufficient margin for rated current.
For ELM95 series, ELM recommends schottky diodes.
3) Capacitor
When choosing capacitor, please select that which is generally used for smoothing power supply circuit, with
comparatively large capacity, with small equivalent series resistance, and with large rated voltage.
For ELM95 series, ELM recommends ceramic capacitor, although Aluminum electrolytic and Tantalum capacitors also can be used. Under heavier load condition using small output capacitor, there might be cases that
few hundred hertz wave motion will happen in output voltage waveform. Under such cases, ELM recommends
to use capacitor with larger capacity. Examples are shown as follows. ELM recommends 47µF or larger for Cout
and 47µF for Cin. On the other hand, under light load use (Iout<20mA) only, it is possible to use smaller capacitors
such as Cin=Cout=22µF.
One of example of solution for large amplitude waveform with lower frequency are shown as follows:
ELM9550AxE Vout waveform
5.25 5.25
5.25 5.25
Vin=3.0V,
Vin=3.0V,
Iout=100mA
Iout=100mA
5.20 5.20
5.10 5.10
5.05 5.05
5.00 5.00
4.95 4.95
using Cout=47µF
Vin=3.0V,
Vin=3.0V,
Iout=100mA
Iout=100mA
Vout (V)
5.15 5.15
Vout (V)
5.15 5.15
5.10 5.10
Vout (V)
Vout (V)
5.20 5.20
ELM9550AxE Vout waveform
using Cout=22µF
5.05 5.05
5.00 5.00
4.95 4.95
4.90 4.90
4.90 4.90
4.85 4.85
4.85 4.85
4.80 4.80
4.80 4.80
4.75 4.75
400360 400
360
320
320
280
280
240
240
200160
200
120
0 40 0 804012080160
4.75 4.75
400360 400
360
320
320
280
280
240
240
200160
200
120
0 40 0 804012080160
Time Time
( �s) ( �s)
Time Time
( �s) ( �s)
4) Remedies for noise
The DC/DC converter may cause electromagnetic noise due to switching of coil under large current. Solution
is necessary especially when the IC is used in wireless devices. To reduce noise, this IC is designed in consideration of coil switching characteristics. The following methods are also effective to reduce noise.
• Use shield-type, or magnetic shield coil.
• Locate coil and diode to the LX terminal of IC as close as possible.
• Select ground wire as thick and short as possible.
• Connect ground wire of circuit to one point.
Rev.1.2
15 - 7
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
■Typical characteristics
�ELM9527AxE (VOUT=2.7V, Fosc=55kHz, Duty=60%) L=220�H, CIN=COUT=47�F, D=DB2J208, Top=25�
• ELM9527AxE(Vout=2.7V, Fosc=55kHz, Duty=60%) L=220µH, Cin=Cout=47µF, D=DB2J208, Top=25°C
Vout-Vin
3.0
Iout=1mA
2.8
2.8
2.7
2.4
2.2
Iout=10mA
2.0
Iout=60mA
0.5
1.0
1.5
2.0
Vin (V)
Efficiency-Iout
100
Iout (mA)
100
Vout, Frequency-Top
Vin=1.5V, Iout=10mA
50
0.1
1
10
Iout (mA)
100
Vst, Vhold-Iout
1.6
Vout
65
60
2.68
2.66
50
0
-20
20
40
Top (�)
Vout (V)
2.8
0.8
2.7
2.6
2.5
100
Iout
Vhold
50mA
50
0.2
1mA
20
30
Iout (mA)
40
50
45
Vout
2.4
0.6
80
Vin=1.5V
2.9
1.0
60
Load transient response
3.0
Vst
10
55
Frequency
2.62
-40
1000
75
70
2.64
Vin=1.8V
0
0
1000
Frequency (kHz)
Vout (V)
Efficiency (%)
Vin=1.5V
60
Vst, Vhold (V)
10
2.70
Vin=0.9V
70
0.4
1
2.72
Vin=1.1V
1.2
Vin=1.8V
2.74
90
1.4
Vin=1.1V
2.3
0.1
2.5
Vin=1.5V
Vin=0.9V
2.5
2.4
1.8
80
2.6
0
2
4
1mA
6
0
8 10 12 14 16 18 20
Iout (mA)
Vout (V)
Vout (V)
2.6
1.6
0.0
Vout-Iout
2.9
Time (ms)
Rev.1.2
15 - 8
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
�ELM9530AxE (VOUT=3.0V, Fosc=55kHz, Duty=60%) L=220�H, CIN=Cout=47�F, D=DB2J208, Top=25�
• ELM9530AxE(Vout=3.0V, Fosc=55kHz, Duty=60%) L=220µH, Cin=Cout=47µF, D=DB2J208, Top=25°C
Vout-Vin
3.2
Iout=1mA
3.0
3.1
Iout=10mA
Iout=60mA
2.7
1.8
0.0
2.6
0.1
0.5
1.0
1.5
Vin (V)
2.0
2.5
3.0
Efficiency-Iout
Vin=0.9V
Vin=1.1V
Vin=1.5V
60
1
10
Iout (mA)
100
10
100
Iout (mA)
Vin=1.5V, Iout=10mA
Vout
65
60
2.98
2.96
55
Frequency
50
0
-20
20
40
Top (�)
Vout (V)
2.9
2.8
100
Iout
Vhold
50mA
50
0.2
1mA
10
20
30
Iout (mA)
40
50
45
Vout
3.0
2.7
0.6
80
Vin=1.5V
3.1
0.8
60
Load transient response
3.2
Vst
75
70
3.3
1.0
0
0
1000
Vout, Frequency-Top
2.92
-40
1000
Vst, Vhold-Iout
1.6
0.4
1
2.94
50
0.1
1.2
Vin=2.4V
3.02
Vin=1.8V
1.4
Vin=1.8V
3.00
70
Vin=1.5V
Vin=1.1V
3.04
Vin=2.4V
90
Vin=0.9V
2.8
2.0
100
Vst, Vhold (V)
2.9
Frequency (kHz)
2.4
0
2
4
1mA
6
0
8 10 12 14 16 18 20
Iout (mA)
2.6
2.2
Efficiency (%)
Vout (V)
3.0
Vout (V)
Vout (V)
2.8
80
Vout-Iout
3.2
Time (ms)
Rev.1.2
15 - 9
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
�ELM9533AxE (VOUT=3.3V, Fosc=55kHz, Duty=60%) L=220�H, CIN=Cout=47�F, D=DB2J208, Top=25�
• ELM9533AxE(Vout=3.3V, Fosc=55kHz, Duty=60%) L=220µH, Cin=Cout=47µF, D=DB2J208, Top=25°C
Vout-Vin
Iout=1mA
3.4
3.0
Iout=10mA
2.8
Iout=60mA
2.6
3.2
2.2
0.0
2.9
0.1
0.5
1.0
1.5
Vin (V)
2.0
2.5
3.0
Efficiency-Iout
Vout (V)
Vin=1.1V
Vin=1.5V
Vin=1.8V
60
1
10
Iout (mA)
100
Vin=2.4V
1
10
Iout (mA)
100
Vin=1.5V, Iout=10mA
Vout
3.30
65
60
3.28
3.26
55
Frequency
50
0
-20
20
40
Top (�)
Vout (V)
0.8
3.2
3.1
100
Iout
Vhold
50mA
50
0.2
1mA
10
20
30
Iout (mA)
40
50
45
Vout
3.3
3.0
0.6
80
Vin=1.8V
3.4
1.0
60
Load transient response
3.5
Vst
75
70
3.6
1.2
0
0
1000
Vout, Frequency-Top
3.22
-40
1000
Vst, Vhold-Iout
1.6
0.4
Vin=1.8V
3.24
50
0.1
1.4
Vin=1.5V
3.32
Vin=0.9V
70
Vin=1.1V
3.34
Vin=2.4V
80
Vin=0.9V
3.1
3.0
90
Efficiency (%)
3.3
2.4
100
Vst, Vhold (V)
Vout (V)
Vout (V)
3.2
Frequency (kHz)
3.4
Vout-Iout
3.5
0
2
4
1mA
6
Iout (mA)
3.6
0
8 10 12 14 16 18 20
Time (ms)
Rev.1.2
15 - 10
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
�ELM9550AxE (VOUT=5.0V, Fosc=55kHz, Duty=60%) L=220�H, CIN=Cout=47�F, D=DB2J208, Top=25�
• ELM9550AxE(Vout=5.0V, Fosc=55kHz, Duty=60%) L=220µH, Cin=Cout=47µF, D=DB2J208, Top=25°C
Vout-Vin
5.2
Iout=1mA
5.0
5.1
Vin=3.0V
5.0
Vout (V)
4.6
Iout=10mA
4.4
Iout=60mA
4.2
4.9 Vin=0.9V
4.8
Vin=1.1V
Vin=1.8V
Vin=1.5V
4.7
4.0
1.0
2.0
3.0
4.0
Vin (V)
4.6
0.1
5.0
Efficiency-Iout
100
1
Vin=3.0V, Iout=10mA
70
Vout (V)
Vin=1.8V
Vin=1.1V
Vin=1.5V
60
Vout
65
60
4.96
4.92
1
10
Iout (mA)
100
50
4.84
-40
1000
Vst, Vhold-Iout
2.5
0
-20
20
40
Top (�)
Vout (V)
Vst, Vhold (V)
1.5
0.5
0
0
4.9
4.8
100
Iout
50mA
50
Vhold
1mA
10
20
30
Iout (mA)
40
50
45
Vout
5.0
4.7
1.0
80
Vin=3.0V
5.1
Vst
60
Load transient response
5.3
5.2
2.0
55
Frequency
4.88
50
0.1
75
70
5.00
Vin=0.9V
1000
5.04
90
80
100
Vout, Frequency-Top
5.08
Vin=3.0V
10
Iout (mA)
Frequency (kHz)
3.8
0.0
0
2
4
1mA
6
Iout (mA)
Vout (V)
4.8
Efficiency (%)
Vout-Iout
5.2
0
8 10 12 14 16 18 20
Time (ms)
Rev.1.2
15 - 11
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
�ELM9527BxE (VOUT=2.7V, Fosc=100kHz, Duty=77%) L=100�H, CIN=Cout=47�F, D=DB2J208, Top=25�
• ELM9527BxE(Vout=2.7V, Fosc=100kHz, Duty=77%) L=100µH, Cin=Cout=47µF, D=DB2J208, Top=25°C
Iout=1mA
2.8
2.4
Iout=10mA
2.2
Iout=60mA
2.0
0.5
Vin=0.9V
2.5
Vin=1.1V
1.0
1.5
2.0
Vin (V)
Vin=1.5V
2.3
0.1
2.5
Efficiency-Iout
100
1
Vin=1.8V
10
Iout (mA)
2.72
Vout (V)
80
Vin=0.9V
Vin=1.1V
60
1
10
Iout (mA)
100
Vout
Vst, Vhold-Iout
1.6
110
105
2.68
2.66
95
0
-20
20
40
Iout (mA)
2.8
0.8
Vhold
Vout (V)
Vst
2.6
2.5
100
Iout
0.4
50mA
50
0.2
0
0
1mA
10
20
30
Iout (mA)
40
50
90
Vout
2.7
2.4
0.6
80
Vin=1.5V
2.9
1.2
60
Load transient response
3.0
1.4
1.0
100
Frequency
2.62
-40
1000
120
115
2.64
Vin=1.5V
50
0.1
1000
Vin=1.5V, Iout=10mA
2.70
70
100
Vout, Frequency-Top
2.74
90
Efficiency (%)
2.6
2.4
1.8
Vst, Vhold (V)
Vin=1.8V
2.7
Vout (V)
Vout (V)
2.6
1.6
0.0
Vout-Iout
2.9
Frequency (kHz)
2.8
Vout-Vin
0
2
4
1mA
6
Iout (mA)
3.0
0
8 10 12 14 16 18 20
Time (ms)
Rev.1.2
15 - 12
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
�ELM9530BxE (VOUT=3.0V, Fosc=100kHz, Duty=77%) L=100�H, CIN=Cout=47�F, D=DB2J208, Top=25�
• ELM9530BxE(Vout=3.0V, Fosc=100kHz, Duty=77%) L=100µH, Cin=Cout=47µF, D=DB2J208, Top=25°C
Vout-Vin
3.2
Iout=1mA
3.0
3.1
Iout=10mA
Iout=60mA
2.2
2.7
1.8
0.0
2.6
0.1
0.5
1.0
1.5
Vin (V)
2.0
3.0
Efficiency-Iout
Vin=1.5V
Vin=1.8V
1
10
Iout (mA)
Vout (V)
Vin=1.1V
Vin=1.5V
Vin=1.8V
50
0.1
1
10
Iout (mA)
100
Vin=1.5V, Iout=10mA
Vout
110
105
2.98
2.96
95
0
-20
20
40
Iout (mA)
3.1
Vout (V)
Vst
0.8
Vhold
2.9
2.8
100
2.7
Iout
50mA
50
0.2
1mA
20
30
Iout (mA)
40
50
90
Vout
3.0
0.4
10
80
Vin=1.5V
3.2
1.2
60
Load transient response
3.3
1.4
0
0
100
Frequency
2.92
-40
1000
120
115
2.94
Vst, Vhold-Iout
1.6
1000
3.02
Vin=0.9V
60
100
Vout, Frequency-Top
3.00
70
0.6
Vin=1.1V
3.04
Vin=2.4V
90
Efficiency (%)
2.5
Vin=0.9V
2.8
2.0
100
Vst, Vhold (V)
2.9
Frequency (kHz)
2.4
0
2
4
1mA
6
Iout (mA)
2.6
1.0
Vin=2.4V
3.0
Vout (V)
Vout (V)
2.8
80
Vout-Iout
3.2
0
8 10 12 14 16 18 20
Time (ms)
Rev.1.2
15 - 13
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
�ELM9533BxE (VOUT=3.3V, Fosc=100kHz, Duty=77%) L=100�H, CIN=Cout=47�F, D=DB2J208, Top=25�
• ELM9533BxE(Vout=3.3V, Fosc=100kHz, Duty=77%) L=100µH, Cin=Cout=47µF, D=DB2J208, Top=25°C
Vout-Vin
3.6
Iout=1mA
3.4
3.4
Iout=60mA
0.5
1.0
1.5
Vin (V)
2.0
2.5
2.9
0.1
3.0
Efficiency-Iout
100
10
Iout (mA)
Vout (V)
Vin=0.9V
Vin=1.1V
70
Vin=1.5V
60
Vin=1.5V, Iout=10mA
1
10
Iout (mA)
100
Vout
Vst, Vhold-Iout
1.6
110
105
3.28
3.26
95
0
-20
20
40
Iout (mA)
3.4
Vout (V)
Vst
0.8
Vhold
3.2
3.1
100
3.0
Iout
50mA
50
0.2
1mA
20
30
Iout (mA)
40
50
90
Vout
3.3
0.4
10
80
Vin=1.8V
3.5
1.2
60
Load transient response
3.6
1.4
0
0
100
Frequency
3.22
-40
1000
120
115
3.24
Vin=1.8V
50
0.1
1000
Vout, Frequency-Top
3.30
80
100
3.32
90
Efficiency (%)
1
3.34
Vin=2.4V
Vst, Vhold (V)
Vin=1.5V
Vin=1.8V
3.0
2.4
0.6
Vin=1.1V
3.1
Frequency (kHz)
2.6
Vin=0.9V
3.2
0
2
4
1mA
6
Iout (mA)
Iout=10mA
2.8
1.0
Vin=2.4V
3.3
3.0
Vout (V)
Vout (V)
3.2
2.2
0.0
Vout-Iout
3.5
0
8 10 12 14 16 18 20
Time (ms)
Rev.1.2
15 - 14
ELM95xxxxE CMOS PWM step-up DC/DC converter
http://www.elm-tech.com
�ELM9550BxE (VOUT=5.0V, Fosc=100kHz, Duty=77%) L=100�H, CIN=Cout=47�F, D=DB2J208, Top=25�
• ELM9550BxE(Vout=5.0V, Fosc=100kHz, Duty=77%) L=100µH, Cin=Cout=47µF, D=DB2J208, Top=25°C
Vout-Vin
5.2
Iout=1mA
5.0
5.1
4.6
Iout=10mA
4.4
Iout=60mA
4.2
Vin=1.1V
4.8
Vin=1.5V Vin=1.8V
2.0
3.0
4.0
Vin (V)
4.6
0.1
5.0
Efficiency-Iout
1
Vin=3.0V, Iout=10mA
Vout (V)
Vin=0.9V
Vin=1.1V
Vin=1.5V
Vin=1.8V
60
Vout
110
105
4.96
4.92
1
10
Iout (mA)
100
95
4.84
-40
1000
Vst, Vhold-Iout
1.6
0
-20
20
40
Iout (mA)
5.1
Vout (V)
1.0
0.8
5.0
4.9
4.8
100
Iout
Vhold
50mA
50
0.2
1mA
10
20
30
Iout (mA)
40
50
90
Vout
4.7
0.6
80
Vin=3.0V
5.2
Vst
60
Load transient response
5.3
1.4
0
0
100
Frequency
4.88
50
0.1
120
115
5.00
70
1000
5.04
90
80
100
Vout, Frequency-Top
5.08
Vin=3.0V
10
Iout (mA)
Frequency (kHz)
1.0
100
Efficiency (%)
Vin=0.9V
0
2
4
1mA
6
Iout (mA)
3.8
0.0
Vst, Vhold (V)
4.9
4.7
4.0
0.4
Vin=3.0V
5.0
Vout (V)
Vout (V)
4.8
1.2
Vout-Iout
5.2
0
8 10 12 14 16 18 20
Time (ms)
Rev.1.2
15 - 15
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