ELM92series

ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
■General description
ELM92xxxx is CMOS PWM step-up DC/DC converter which consists of reference voltage source, error
amplifier, oscillation circuit, start-up circuit, output voltage setting resistor, LX transistor and switching current
limiter. For external parts, coil, diode and capacitor are possible choices; with external parts, ELM92 series is
able to acquire constant output voltage higher than input voltage. The standard output voltages are 2.7V, 3.0V,
3.3V, and 5.0V; ELM92 series can also be designed as semi-custom IC within the range of 2.5V to 5.5V by 0.1V
step. Meanwhile, 600kHz high frequency PWM control scheme makes it easy to design DC/DC converter which
can generate large output current with high stability and small ripples by only using small external inductor.
With newly developed intermittent operation control scheme, ELM92 series is able to work with high efficiency
under wide range of load conditions.
■Features
■Application
•
•
•
•
•
• Constant voltage source for
battery-operated devices
• Constant voltage source for PDAs,
cameras, portable communications
equipments and videos
• Local regulator
Output voltage range : 2.5V to 5.5V (by 0.1V)
Low voltage operation : Vin≥0.9V
Oscillating frequency : Typ.600kHz
Output current(e.g.) : 250mA(Vin=1.5V, Vout=3.0V)
CE(Chip-enable pin) available
: Max.0.5μA(ELM92xx2x Iss at shutdown)
• High efficiency
: Typ.85%
• Switching current limiter
• Package
: SOT-89, SOT-89-5
■Maximum absolute ratings
Parameter
Apply voltage to LX pin
Apply voltage to VOUT pin
Apply voltage to CE pin
Power dissipation
Symbol
Vlx
Vout
Vce
Limit
Vss-0.3 to 8.0
Vss-0.3 to 8.0
Vss-0.3 to 8.0
500 (SOT-89)
500 (SOT-89-5)
-40 to +85
-55 to +125
Pd
Operating temperature
Storage temperature
Top
Tstg
Unit
V
V
V
mW
°C
°C
■Selection guide
ELM92xxxx-x
Symbol
a, b
Output voltage
c
CE selection
d
Package
e
Taping direction
e.g. :
27: Vout=2.7V
30: Vout=3.0V
33: Vout=3.3V
50: Vout=5.0V
1: No CE type (SOT-89)
2: CE type (SOT-89-5)
B: SOT-89, SOT-89-5
S: Refer to PKG file
N: Refer to PKG file
14 - 1
ELM92 x x x x - x
↑ ↑ ↑ ↑ ↑
a b c d e
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
■Pin configuration
SOT-89(TOP VIEW)
SOT-89-5(TOP VIEW)
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Pin No.
1
2
3
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Pin name
VOUT
VSS
LX
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Pin No.
1
2
3
4
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Pin name
VOUT
VSS
LX
NC
CE
("H"=active,
"L"=shutdown)
5
■Standard circuit
• ELM92xx1x
• ELM92xx2x
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14 - 2
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■Block diagram
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ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
■Electrical characteristics (ELM92xx1x)
Vout=2.7V(ELM92271x)
Parameter
Input voltage
Starting voltage
Output voltage1
Output voltage2
Current consumption1
Current consumption2
Oscillating frequency
Duty ratio
Frequency of
intermittent control
On-resistance of LX switch
Leakage current of
LX switch
L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C
Symbol
Condition
Min.
Typ.
Max. Unit Note
Vin
7
V
Vst No-load
0.9
V
1
Vout1 Iout=60mA, Vin=1.5V
2.633 2.700 2.767
V
1
Vout1 Vout1 Vout1
Vout2 Iout=0.1mA, Vin=1.5V
V
1
×1.005 ×1.010 ×1.020
Iss1 Vout=Vout(T)×0.95
280
450
μA
2
Iss2 Vout=Vout(T)+ 0.5V
70
110
μA
2
Fosc Vout=Vout(T)×0.95
510
600
690
kHz
3
Duty Vout=Vout(T)×0.95
80
88
95
%
3
Fimt
Ron
Vout=Vout(T)×0.95
Ilxl
Vout=Vlx=7V
12
17
kHz
3
270
370
mΩ
4
1
μA
5
* Vout: input voltage to VOUT pin
* Vout(T): typical value of Vout1
* Remarks: test circuit No
Vout=3.0V(ELM92301x)
Parameter
Input voltage
Starting voltage
Output voltage1
Output voltage2
Current consumption1
Current consumption2
Oscillating frequency
Duty ratio
Frequency of
intermittent control
On-resistance of LX switch
Leakage current of
LX switch
L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C
Symbol
Condition
Min.
Typ.
Max. Unit Note
Vin
7
V
Vst No-load
0.9
V
1
Vout1 Iout=60mA, Vin=1.5V
2.925 3.000 3.075
V
1
Vout1 Vout1 Vout1
Vout2 Iout=0.1mA, Vin=1.5V
V
1
×1.005 ×1.010 ×1.020
Iss1 Vout=Vout(T)×0.95
300
480
μA
2
Iss2 Vout=Vout(T)+0.5V
75
120
μA
2
Fosc Vout=Vout(T)×0.95
510
600
690
kHz
3
Duty Vout=Vout(T)×0.95
80
88
95
%
3
Fimt
Ron
Vout=Vout(T)×0.95
Ilxl
Vout=Vlx=7V
* Vout: input voltage to VOUT pin
* Vout(T): typical value of Vout1
* Remarks: test circuit No
14 - 3
12
17
kHz
3
250
340
mΩ
4
1
μA
5
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
Vout=3.3V(ELM92331x)
Parameter
Input voltage
Starting voltage
Output voltage1
Output voltage2
Current consumption1
Current consumption2
Oscillating frequency
Duty ratio
Frequency of
intermittent control
On-resistance of LX switch
Leakage current of
LX switch
L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C
Symbol
Condition
Min.
Typ.
Max. Unit Note
Vin
7
V
Vst No-load
0.9
V
1
Vout1 Iout=60mA, Vin=1.5V
3.218 3.300 3.382
V
1
Vout1 Vout1 Vout1
Vout2 Iout=0.1mA, Vin=1.5V
V
1
×1.005 ×1.010 ×1.020
Iss1 Vout=Vout(T)×0.95
320
510
μA
2
Iss2 Vout=Vout(T)+0.5V
80
130
μA
2
Fosc Vout=Vout(T)×0.95
510
600
690
kHz
3
Duty Vout=Vout(T)×0.95
80
88
95
%
3
Fimt
Ron
Vout=Vout(T)×0.95
Ilxl
Vout=Vlx=7V
12
17
kHz
3
245
330
mΩ
4
1
μA
5
* Vout: input voltage to VOUT pin
* Vout(T): typical value of Vout1
* Remarks: test circuit No
Vout=5.0V(ELM92501x)
Parameter
Input voltage
Starting voltage
Output voltage1
Output voltage2
Current consumption1
Current consumption2
Oscillating frequency
Duty ratio
Frequency of
intermittent control
On-resistance of LX switch
Leakage current of
LX switch
L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C
Symbol
Condition
Min.
Typ.
Max. Unit Note
Vin
7
V
Vst No-load
0.9
V
1
Vout1 Iout=60mA, Vin=3V
4.875 5.000 5.125
V
1
Vout1 Vout1 Vout1
Vout2 Iout=0.1mA, Vin=3V
V
1
×1.005 ×1.010 ×1.020
Iss1 Vout=Vout(T)×0.95
550
880
μA
2
Iss2 Vout=Vout(T)+0.5V
90
145
μA
2
Fosc Vout=Vout(T)×0.95
510
600
690
kHz
3
Duty Vout=Vout(T)×0.95
80
88
95
%
3
Fimt
Ron
Vout=Vout(T)×0.95
Ilxl
Vout=Vlx=7V
* Vout: input voltage to VOUT pin
* Vout(T): typical value of Vout1
* Remarks: test circuit No
14 - 4
12
17
kHz
3
220
300
mΩ
4
1
μA
5
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
■Electrical characteristics (ELM92xx2x)
Vout=2.7V(ELM92272x)
Parameter
Input voltage
Starting voltage
Output voltage1
Output voltage2
Current consumption1
Current consumption2
Current consumption
in Shutdown
Oscillating frequency
Duty ratio
Frequency of
Intermittent control
On-resistance of LX switch
Leakage current of LX switch
CE Input voltage "H"
CE Input voltage "L"
CE Input current "H"
CE Input current "L"
Vce=Vout, L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C
Symbol
Condition
Min.
Typ.
Max. Unit Note
Vin
7
V
Vst No-load
0.9
V
1
Vout1 Iout=60mA, Vin=1.5V
2.633 2.700 2.767
V
1
Vout1 Vout1 Vout1
Vout2 Iout=0.1mA, Vin=1.5V
V
1
×1.005 ×1.010 ×1.020
Iss1 Vout=Vout(T)×0.95
280
450
μA
2
Iss2 Vout=Vout(T)+0.5V
70
110
μA
2
Isd
Vout=Vout(T)×0.95, Vce=0
0.5
μA
2
600
88
690
95
kHz
%
3
3
Fimt
12
17
kHz
3
Ron Vout=Vout(T)×0.95
Ilxl Vout=Vlx=7V
Vceh
Vcel
Vout=Vout(T)×0.95,
Iceh
Vce=Vout(T)×0.95
Icel Vout=Vout(T)×0.95, Vce=0
270
370
1
0.25
mΩ
μA
V
V
4
5
6
6
0.1
μA
6
-0.1
μA
6
Fosc Vout=Vout(T)×0.95
Duty Vout=Vout(T)×0.95
510
80
0.8
* 1.Vout: input voltage to VOUT pin. 2.Vout(T): typical value of Vout1. 3.Vce: input voltage to CE pin. 4.Remarks: test circuit No
Vout=3.0V(ELM92302x)
Parameter
Input voltage
Starting voltage
Output voltage1
Output voltage2
Current consumption1
Current consumption2
Current consumption
in Shutdown
Oscillating frequency
Duty ratio
Frequency of
Intermittent control
On-resistance of LX switch
Leakage current of LX switch
CE Input voltage "H"
CE Input voltage "L"
CE Input current "H"
CE Input current "L"
Vce=Vout, L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C
Symbol
Condition
Min.
Typ.
Max. Unit Note
Vin
7
V
Vst No-load
0.9
V
1
Vout1 Iout=60mA, Vin=1.5V
2.925 3.000 3.075
V
1
Vout1 Vout1 Vout1
Vout2 Iout=0.1mA, Vin=1.5V
V
1
×1.005 ×1.010 ×1.020
Iss1 Vout=Vout(T)×0.95
300
480
μA
2
Iss2 Vout=Vout(T)+0.5V
75
120
μA
2
Isd
Vout=Vout(T)×0.95, Vce=0
0.5
μA
2
600
88
690
95
kHz
%
3
3
Fimt
12
17
kHz
3
Ron Vout=Vout(T)×0.95
Ilxl Vout=Vlx=7V
Vceh
Vcel
Vout=Vout(T)×0.95,
Iceh
Vce=Vout(T)×0.95
Icel Vout=Vout(T)×0.95, Vce=0
250
340
1
0.25
mΩ
μA
V
V
4
5
6
6
0.1
μA
6
-0.1
μA
6
Fosc Vout=Vout(T)×0.95
Duty Vout=Vout(T)×0.95
510
80
0.8
* 1.Vout: input voltage to VOUT pin. 2.Vout(T): typical value of Vout1. 3.Vce: input voltage to CE pin. 4.Remarks: test circuit No
14 - 5
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
Vout=3.3V(ELM92332x)
Parameter
Input voltage
Starting voltage
Output voltage1
Output voltage2
Current consumption1
Current consumption2
Current consumption
in Shutdown
Oscillating frequency
Duty ratio
Frequency of
Intermittent control
On-resistance of LX switch
Leakage current of LX switch
CE Input voltage "H"
CE Input voltage "L"
CE Input current "H"
CE Input current "L"
Vce=Vout, L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C
Symbol
Condition
Min.
Typ.
Max. Unit Note
Vin
7
V
Vst No-load
0.9
V
1
Vout1 Iout=60mA, Vin=1.5V
3.218 3.300 3.382
V
1
Vout1 Vout1 Vout1
Vout2 Iout=0.1mA, Vin=1.5V
V
1
×1.005 ×1.010 ×1.020
Iss1 Vout=Vout(T)×0.95
320
510
μA
2
Iss2 Vout=Vout(T)+0.5V
80
130
μA
2
Isd
Vout=Vout(T)×0.95, Vce=0
0.5
μA
2
600
88
690
95
kHz
%
3
3
Fimt
12
17
kHz
3
Ron Vout=Vout(T)×0.95
Ilxl Vout=Vlx=7V
Vceh
Vcel
Vout=Vout(T)×0.95,
Iceh
Vce=Vout(T)×0.95
Icel Vout=Vout(T)×0.95, Vce=0
245
330
1
0.25
mΩ
μA
V
V
4
5
6
6
0.1
μA
6
-0.1
μA
6
Fosc Vout=Vout(T)×0.95
Duty Vout=Vout(T)×0.95
510
80
0.8
* 1.Vout: input voltage to VOUT pin. 2.Vout(T): typical value of Vout1. 3.Vce: input voltage to CE pin. 4.Remarks: test circuit No
Vout=5.0V(ELM92502x)
Parameter
Input voltage
Starting voltage
Output voltage1
Output voltage2
Current consumption1
Current consumption2
Current consumption
in Shutdown
Oscillating frequency
Duty ratio
Frequency of
Intermittent control
On-resistance of LX switch
Leakage current of LX switch
CE Input voltage "H"
CE Input voltage "L"
CE Input current "H"
CE Input current "L"
Vce=Vout, L=2.2μH, Cout=47μF, D=MA735, Vss=0V, Top=25°C
Symbol
Condition
Min.
Typ.
Max. Unit Note
Vin
7
V
Vst No-load
0.9
V
1
Vout1 Iout=60mA, Vin=3V
4.875 5.000 5.125
V
1
Vout1 Vout1 Vout1
Vout2 Iout=0.1mA, Vin=3V
V
1
×1.005 ×1.010 ×1.020
Iss1 Vout=Vout(T)×0.95
550
880
μA
2
Iss2 Vout=Vout(T)+0.5V
90
145
μA
2
Isd
Vout=Vout(T)×0.95, Vce=0
0.5
μA
2
600
88
690
95
kHz
%
3
3
Fimt
12
17
kHz
3
Ron Vout=Vout(T)×0.95
Ilxl Vout=Vlx=7V
Vceh
Vcel
Vout=Vout(T)×0.95,
Iceh
Vce=Vout(T)×0.95
Icel Vout=Vout(T)×0.95, Vce=0
220
300
1
0.25
mΩ
μA
V
V
4
5
6
6
0.1
μA
6
-0.1
μA
6
Fosc Vout=Vout(T)×0.95
Duty Vout=Vout(T)×0.95
510
80
0.8
* 1.Vout: input voltage to VOUT pin. 2.Vout(T): typical value of Vout1. 3.Vce: input voltage to CE pin. 4.Remarks: test circuit No
14 - 6
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
■Test circuits
1. Vout1, Vout2, Vst
2. Iss1, Iss2, Isd
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3. Fosc, Duty, Fimt (LX pin)
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* Fosc, Duty : Vin=Vout(T)×0.95
* Fimt : Vin=Vout1(1.005 to 1.020)
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* Vlx=3V, R=30Ω
R • Von
* Ron= Vlx-Von Ω
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5. Ilxl
6. Vceh, Vcel, Iceh, Icel
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Remarks) CE pin : ELM92xx2x series
14 - 7
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ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
■External parts
To design DC/DC converters using ELM92 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 2.2μH. It is possible that output voltage ripple form may reach
over 10mV when using high industance. If ripple can be ingored, it is possible to acquire high efficiency
with high industance.
The examples using 4.7μH are shown as follows.
ELM9230xx
ELM9250xx
ELM9230xx
ELM9250xx
EFFICIENCY - Iout
EFFICIENCY - Iout
100
100
2.4V
1.8V
80
70
1.5V
Vin=0.9V
60
1.1V
50
3.6V
90
40
30
EFFICIENCY (%)
EFFICIENCY (%)
90
Vin=1.8V
70
2.4V
60
50
40
30
20
20
10
10
0
3.0V
80
0
0.1
1
10
Iout (mA)
100
1000
0.1
1
10
Iout (mA)
100
1000
* CR43/CD43/CR54/CD54 : Sumida Electric Co., Ltd are recommended.
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.
ELM recommends diode which is around 1A class.
3) Capacitor
* Cout
When choosing capacitor, please select that which is generally used for smoothing power supply circuit,
with comparatively large capacity and whose rated voltage is at least three times larger than rated output
voltage of used ELM92 series. ELM recommends capacitor which is 47μF to 220μF. When Vin is high
(Vin>Vout×0.7), it is possible that large ripple of Iout may happen because of intermittent operation; ELM
recommends to use larger capacitor under such circumstance.
Cin
*
Using Cin in the circuit can lower feedback noise to Input; this method is also effective in improving
efficiency because input voltage drop during switching can be eased. To gain this effect, please connect
tantalum capacitor of 47μF to 220μF to coil as close as possible.
14 - 8
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
4) Remedies for noise
This 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.
■Marking
SOT-89
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SOP-89-5
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• SOT-89 package : ELM92xx1B
• SOT-89-5 package : ELM92xx2B(with CE)
a : Assembly lot No.
B to Z (I, O, X excepted)
b : Assembly lot No.
A to Z (I, O, X excepted)
c : the integer digit of the output voltage
Mark
Vout
Mark
Vout
2
2.*V
4
4.*V
3
3.*V
5
5.*V
d : the decimal digit of the output voltage
Mark
Vout
Mark
Vout
0
.0V
5
*
*.5V
1
6
*.1V
*.6V
2
.2V
7
*
*.7V
3
8
*.3V
*.8V
4
.4V
9
*
*.9V
14 - 9
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
■Typical characteristics
• Vout=2.7V(ELM9227xx) (L=2.2μH, Cout=47μF, D=MA735, Top=25°C)
Vout
Vout --- Vin
Vin
Vout
Vin
3.5
3.5
3.5
2.9
2.9
2.9
Iout=150mA
Iout=150mA
Iout=150mA
2
22
60mA
60mA
60mA
10mA
10mA
10mA
1.5
1.5
1.5
1
10
0
EFFICIENCY(%)
(%)
EFFICIENCY
Vout
Vout(V)
(V)
Vout
(V)
2.5
2.5
2.5
1.1V 1.5V 1.8V
1.1V1.5V
1.5V 1.8V
1.8V
1.1V
2.8
2.8
2.8
2.7 Vin=0.9V
2.7 Vin=0.9V
Vin=0.9V
2.7
2.6
2.6
2.6
2.5
2.5
2.5
1
1
2.4
2.4
0.1
2.4
0.1
0.1
2
22
Vin (V)
(V)
Vin (V)
EFFICIENCY
EFFICIENCY --- Iout
Iout
EFFICIENCY
Iout
Vin=0.9V
Vin=0.9V
Vin=0.9V
1
11
1.8V
1.8V
1.8V
1.5V
1.5V
1.5V
10
10
10
Iout
(mA)
Iout(mA)
(mA)
Iout
100
100
100
1000
1000
1000
Vout1
Top
Vout1---Top
Top
Vout1
2.8
2.8
2.8
Vin=1.5V, Iout=60mA
Vin=1.5V,Iout=60mA
Iout=60mA
Vin=1.5V,
2.75
2.75
2.75
Vout1(V)
Vout1(V)
Vout1(V)
Vout(V)
(V)
Vout
(V)
Vout
3
33
100
100
90
90
80
80
70
70
60
60
50
50
40
40
30
30
20
20
10
10
00
0.1
0.1
Vout
Iout
Vout---Iout
Iout
Vout
3
33
1.1V
1.1V
1.1V
2.7
2.7
2.7
2.65
2.65
2.65
11
10
10
10
Iout
Iout (mA)
(mA)
(mA)
100
100
100
2.6
2.6
2.6
-20 -10
-10 0 10 20
20 30 40
40 50 60
60 70
-20
-20 -10 00 10
10 20 30
30 40 50
50 60 70
70
1000
1000
1000
Top(°C)
Top(°C)
Top(°C)
Vst
Vst -- Iout
Iout
Iout
22
Load-Transient
Response
Load-Transient
Load-TransientResponse
Response
/div
200 ��ss /div
200
200 �s /div
Vst(V)
(V)
Vst
Vst
(V)
1.5
1.5
1.5
11
1
0.5
0.5
0.5
00
00.1
0.1
0.1
-20°C
-20°C
-20°C
Vout, 50mV/div
50mV/div
Vout,
Vout, 50mV/div
+70°C
+70°C
+70°C
+25°C
+25°C
+25°C
Iout
Iout
Iout
100mA
100mA
100mA
A
100 ��A
100
100 �A
11
1
10
10
10
Iout
Iout
(mA)
Iout (mA)
(mA)
100
100
100
14 - 10
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
• Vout=3.0V(ELM9230xx) (L=2.2μH, Cout=47μF, D=MA735, Top=25°C)
Vout - Vin
Vout
Vout -- Vin
Vin
3.5
3.5
3.5
3.2
3.2
3.2
Iout=150mA
Iout=150mA
Iout=150mA
2
22
60mA
60mA
60mA
10mA
10mA
10mA
1.5
1.5
1.5
11
100
0
EFFICIENCY(%)
(%)
EFFICIENCY
EFFICIENCY
(%)
Vout
Vout
(V)
(V)
Vout
(V)
2.5
2.5
2.5
11
1
Vin
(V)
Vin
Vin (V)
(V)
222
3.1
3.1
3.1
3
33
2.9
2.9
2.9
2.7
2.7
0.1
2.70.1
0.1
3
3
3
EFFICIENCY
- Iout
EFFICIENCY
EFFICIENCY -- Iout
Iout
1
1
1
2.4V
2.4V
2.4V
1.8V
1.8V
1.8V
1.5V
1.5V
Vin=0.9V
1.5V
Vin=0.9V
Vin=0.9V 1.1V
1.1V
1.1V
10
10
10
Iout(mA)
Iout(mA)
Iout(mA)
100
100
100
Vin=1.5V, Iout=60mA
Vin=1.5V,
Vin=1.5V, Iout=60mA
Iout=60mA
3.05
3.05
3.05
333
2.95
2.95
2.95
1
1
10
10
Iout
Iout (mA)
(mA)
100
100
2.9
2.9
2.9-20
-20 -10 00 10
10 20 30
30 40 50
50 60 70
70
-20 -10
-10 0 10 20
20 30 40
40 50 60
60 70
1000
1000
1000
Top(°C)
Top(°C)
Top(°C)
Vst
Vst -- Iout
Iout
222
Load-Transient
Load-TransientResponse
Response
Load-Transient
Response
200
/div
200�
/div
��sss/div
200
Vst
(V)
Vst
Vst(V)
(V)
1.5
1.5
1.5
-20°C
-20°C
111
Vout,
Vout, 50mV/div
50mV/div
Vout,
50mV/div
+70°C
+70°C
0.5
0.5
0.5
000
0.1
0.1
0.1
1000
1000
1000
Vout11--TTop
op
V
Vout
out1 - Top
3.1
3.1
3.1
20
20
20
10
10
10
00
00.1
0.1
0.1
1.8V
1.1V 1.5V 1.8V
1.1V
1.5V 1.8V
1.1V 1.5V
2.4V
2.4V
2.4V
Vin=0.9V
Vin=0.9V
Vin=0.9V
2.8
2.8
2.8
Vout1(V)
Vout1(V)
Vout1(V)
Vout
(V)
Vout
Vout
(V)
(V)
3
33
100
100
100
90
90
90
80
80
80
70
70
70
60
60
60
50
50
50
40
40
40
30
30
30
Vout - Iout
Vout
Vout -- Iout
Iout
3.3
3.3
3.3
Iout
Iout
Iout
+25°C
+25°C
100mA
100mA
100mA
100
100�
AA
��A
100
11
10
10
Iout (mA)
(mA)
Iout
100
100
100
14 - 11
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
• Vout=3.3V(ELM9233xx) (L=2.2μH, Cout=47μF, D=MA735, Top=25°C)
Vout - Vin
Vout
Vout -- Vin
Vin
4
44
3.5
3.5
3.5
Iout=150mA
Iout=150mA
Iout=150mA
2.5
2.5
2.5
60mA
60mA
60mA
10mA
10mA
10mA
22
2
1.5
1.5
1.500
0
EFFICIENCY(%)
(%)
EFFICIENCY
EFFICIENCY
(%)
Vout
Vout
(V)
(V)
Vout
(V)
3
33
11
1
Vin
(V)
Vin
Vin (V)
(V)
222
3.2
3.2
3.2
3330.1
0.1
0.1
3
3
3
EFFICIENCY
- Iout
EFFICIENCY
EFFICIENCY -- Iout
Iout
2.4V
2.4V
2.4V
Vin=0.9V
Vin=0.9V
Vin=0.9V
1
1
1
1.8V
1.8V
1.8V
1.5V
1.5V
1.5V
10
10
10
Iout (mA)
Iout
Iout (mA)
(mA)
100
100
100
Vin=1.5V,Iout=60mA
Iout=60mA
Vin=1.5V,
Vin=1.5V,
Iout=60mA
3.35
3.35
3.35
1.1V
1.1V
1.1V
3.3
3.3
3.3
3.25
3.25
3.25
1
1
10
10
Iout
Iout (mA)
(mA)
100
100
3.2
3.2
3.2-20
-20 -10 00 10
10 20 30
30 40 50
50 60 70
70
-20 -10
-10 0 10 20
20 30 40
40 50 60
60 70
1000
1000
1000
Top(°C)
Top(°C)
Top(°C)
Load-Transient
Load-TransientResponse
Response
Load-Transient
Response
Vst
Vst -- Iout
Iout
222
200
/div
200�
/div
��sss/div
200
Vst
(V)
Vst
Vst(V)
(V)
1.5
1.5
1.5
-20°C
-20°C
111
Vout,
Vout, 50mV/div
50mV/div
Vout,
50mV/div
+70°C
+70°C
0.5
0.5
0.5
000
0.1
0.1
0.1
1000
1000
1000
Vout1 - Top
Vout1
Vout1 -- Top
Top
3.4
3.4
3.4
20
20
20
10
10
10
00
00.1
0.1
0.1
1.1V 1.5V 1.8V
1.1V
1.5V 1.8V
1.1V 1.5V
1.8V
2.4V
2.4V
2.4V
3.3 Vin=0.9V
3.3
3.3 Vin=0.9V
Vin=0.9V
3.4
3.4
3.4
3.1
3.1
3.1
Vout1(V)
Vout1(V)
Vout1(V)
Vout
(V)
Vout
Vout
(V)
(V)
3.5
3.5
3.5
100
100
100
90
90
90
80
80
80
70
70
70
60
60
60
50
50
50
40
40
40
30
30
30
Vout - Iout
Vout
Vout -- Iout
Iout
3.6
3.6
3.6
Iout
Iout
Iout
+25°C
+25°C
100mA
100mA
100mA
100
100�
AA
��A
100
11
10
10
Iout ((mA
mA))
Iout
100
100
100
14 - 12
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
• Vout=5.0V(ELM9250xx) (L=2.2μH, Cout=47μF, D=MA735, Top=25°C)
Vout - Vin
Vout
Vout -- Vin
Vin
5.5
5.5
5.5
Iout=150mA
Iout=150mA
Iout=150mA
4
44
60mA
60mA
60mA
10mA
10mA
10mA
3.5
3.5
3.5
EFFICIENCY(%)
(%)
EFFICIENCY
EFFICIENCY
(%)
33
300
0
100
100
100
90
90
90
80
80
80
70
70
70
60
60
60
50
50
50
40
40
40
30
30
30
Vout
Vout
(V)
(V)
Vout
(V)
4.5
4.5
4.5
11
1
Vin
(V)
Vin
Vin (V)
(V)
222
3
3
3
EFFICIENCY
- Iout
EFFICIENCY
EFFICIENCY -- Iout
Iout
3.0V
3.0V
3.0V
Vin=0.9V
Vin=0.9V
Vin=0.9V
1.8V
1.8V
1.8V
1.5V
1.5V
1.5V
3.0V
3.0V
3.0V
1.8V
1.8V
1.8V
1.1V
1.1V
1.1V 1.5V
1.5V
Vin=0.9V
1.5V
Vin=0.9V
Vin=0.9V
1
1
1
10
10
10
Iout (mA)
Iout
Iout (mA)
(mA)
100
100
100
Vout1 - Top
Vout1
Vout1 -- Top
Top
Vin=3.0V, Iout=60mA
Vin=3.0V,
Vin=3.0V, Iout=60mA
Iout=60mA
1.1V
1.1V
1.1V
5
5
5
4.9
4.9
4.9
1
1
10
10
Iout
Iout (mA)
(mA)
100
100
4.8
4.8
4.8-20
-20 -10 00 10
10 20 30
30 40 50
50 60 70
70
-20 -10
-10 0 10 20
60 70
20 30 40
40 50 60
1000
1000
1000
Top(°C)
Top(°C)
Top(°C)
Vst
Vst -- Iout
Iout
222
Load-Transient
Load-TransientResponse
Response
Load-Transient
Response
200
/div
200�
/div
��sss/div
200
Vst
(V)
Vst
Vst(V)
(V)
1.5
1.5
1.5
-20°C
-20°C
111
Vout,
Vout, 50mV/div
50mV/div
Vout,
50mV/div
+70°C
+70°C
0.5
0.5
0.5
0000.1
0.1
0.1
1000
1000
1000
5.1
5.1
5.1
20
20
20
10
10
10
00
00.1
0.1
0.1
Vout - Iout
Vout
Vout -- Iout
Iout
5.2
5.2
5.2
Vout1(V)
Vout1(V)
Vout1(V)
Vout
(V)
Vout
Vout
(V)
(V)
5
55
5.5
5.5
5.5
5.4
5.4
5.4
5.3
5.3
5.3
5.2
5.2
5.2
5.1
5.1
5.1
5
55
4.9
4.9
4.9
4.8
4.8
4.8
4.7
4.7
4.7
4.6
4.6
4.6
4.5
4.5
0.1
4.50.1
0.1
Iout
Iout
Iout
+25°C
+25°C
100mA
100mA
100mA
100
100�
AA
��A
100
11
10
10
Iout (mA)
(mA)
Iout
100
100
100
14 - 13
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
• ELM9227xx, ELM9230xx, ELM9233xx, ELM9250xx
(L=2.2μH, Cout=47μF, D=MA735, Top=25°C)
Iss1 - Top
600
9250XX
Iss1 (�A)
500
400
9230XX
9233XX
300
9227XX
200
-20 -10 0
10 20 30 40 50 60 70
Top (°C)
Fosc - Top
Fosc - Top
Vceh(V)
Vceh(V)
85
85
75
75-20 -10 0 10 20 30 40 50 60 70
-20 -10 0 10 20 30 40 50 60 70
10 20 30 40 50 60 70
10 20 30 40 50 60 70
Top (°C)
Top (°C)
Top (°C)
Top (°C)
0.7
0.7
0.7
0.7
+25°C
+25°C
0.5
0.5
Vcel - Vout
Vcel - Vout
0.8
0.8
Top= -20°C
Top= -20°C
0.6
0.6
+70°C
+70°C
0.4
0.4
Top= -20°C
Top= -20°C
0.6
0.6
+25°C
+25°C
0.5
0.5
+70°C
+70°C
0.4
0.4
0.3
0.3
0.3
0.3
0.2
0.2
22
90
90
80
80
Vceh - Vout
Vceh - Vout
0.8
0.8
Duty - Top
Duty - Top
95
95
Duty
Duty(%)
(%)
700
700
680
680
660
660
640
640
620
620
600
600
580
580
560
560
540
540
520
520
500
500-20 -10 0
-20 -10 0
Vcel(V)
Vcel(V)
Fosc(kHz)
(kHz)
Fosc
• ELM92xxxx (L=2.2μH, Cout=47μF, D=MA735, Top=25°C)
33
44
Vout(V)
Vout(V)
55
0.2
0.2
22
66
14 - 14
33
44
Vout(V)
Vout(V)
55
66