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
•
•
•
•
•
•
•
•
Output voltage range
Low voltage operation
Oscillating frequency
Output current(e.g.)
CE(Chip-enable pin) available
High efficiency
Switching current limiter
Package
: 2.5V to 5.5V (by 0.1V)
: Vin≥0.9V
: Typ.600kHz
: 250mA (When Vin=1.5V, Vout=3.0V)
: Max. 0.5μA (ELM92xx2x Iss at Shutdown)
: Typ. 85%
: SOT-89, SOT-89-5, SON-6
■Application
• Constant voltage source for battery-operated devices
• Constant voltage source for PDAs, cameras, portable communications equipments and videos
• Local regulator
■Maximum absolute ratings
Parameter
Apply voltage to LX pin
Apply voltage to VOUT pin
Apply voltage to CE pin
Power dissipation
Operating temperature
Storage temperature
Symbol
Vlx
Vout
Vce
Pd
Top
Tstg
15 - 1
Limit
Vss-0.3 to 8.0
Vss-0.3 to 8.0
Vss-0.3 to 8.0
300 (SOT-89)
500 (SOT-89-5)
500 (SON-6)
-40 to +85
-55 to +125
Unit
V
V
V
mW
°C
°C
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
■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, SON-6)
2: CE type
(SOT-89-5, SON-6)
B: SOT-89, SOT-89-5
C: SON-6
S : Refer to PKG file
N : Refer to PKG file
ELM92 x x x x - x
↑ ↑ ↑ ↑ ↑
a b c d e
■Pin configuration
SOT-89 (TOP VIEW)
SOT-89-5 (TOP VIEW)
㪌
㪈
Pin No.
1
2
3
㪉
㪈
㪊
Pin name
VOUT
VSS
LX
Pin No.
1
2
3
4
5
㪉
SON-6 (TOP VIEW)
㪋
㪍
㪌
㪋
㪊
㪈
㪉
㪊
Pin name
VOUT
VSS
LX
NC
CE
("H"=active,
"L"=shutdown)
15 - 2
Pin No.
1
2
3
4
5
6
Pin name
VOUT
VSS
LX
NC
NC
ELM92xx1C:NC
ELM92xx2C:CE
("H"=active,
"L"=shutdown)
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
■Standard circuit
• ELM92xx1x
• ELM92xx2x
㪤㪘㪎㪊㪌
㪤㪘㪎㪊㪌
㪉㪅㪉㱘㪟
㪉㪅㪉㱘㪟
㪭㫀㫅
㪚㫀㫅
㪣㪯
㪭㪦㪬㪫
㪜㪣㪤㪐㪉㫏㫏㪈㫏
㪂
㪭㫀㫅
㪭㫆㫌㫋
㪂
㪭㪪㪪
㪚㫆㫌㫋
㪚㫀㫅
㪚㪜
㪭㪦㪬㪫
㪜㪣㪤㪐㪉㫏㫏㪉㫏
㪭㫆㫌㫋
㪂
㪭㪪㪪
㪋㪎㱘㪝
㪋㪎㱘㪝
㪋㪎㱘㪝
㪂
㪭㪺㪼
㪣㪯
㪚㫆㫌㫋
㪋㪎㱘㪝
■Block diagram
㪭㪦㪬㪫
㪧㪮㪤㩷㪆㩷㪠㫅㫋㪼㫉㫄㫀㫋㫋㪼㫅㫋㩷㫄㫆㪻㪼
㪚㫆㫅㫋㫉㫆㫃㪼㫉
㪂
㪜㫉㫉㫆㫉㩷㪘㫄㫇
㪂
㪄
㪄
㪭㫉㪼㪽
㪚㪜
㪚㪜
㪚㫆㫅㫋㫉㫆㫃㪼㫉
㪣㪯
㪧㪮㪤
㪚㫆㫄㫇㪸㫉㪸㫋㫆㫉
㪩㪸㫄㫇㩷㪮㪸㫍㪼
㪞㪼㫅㪼㫉㪸㫋㫆㫉
㪣㪯㩷㫋㫉㪸㫅㫊㫀㫊㫋㫆㫉
㪻㫉㫀㫍㪼㫉
㪚㫌㫉㫉㪼㫅㫋
㪣㫀㫄㫀㫋㪼㫉
㪧㪿㪸㫊㪼㩷㪚㫆㫄㫇㪼㫅㫊㪸㫋㫀㫆㫅
㪭㪪㪪
■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
: input voltage to VOUT pin
* Vout
* Vout(T) : typical value of Vout1
* Remarks : test circuit No
15 - 3
12
17
kHz
3
270
370
mΩ
4
1
μA
5
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
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
12
17
kHz
3
250
340
mΩ
4
1
μA
5
: input voltage to VOUT pin
* Vout
* Vout(T) : typical value of Vout1
* Remarks : test circuit No
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
: input voltage to VOUT pin
* Vout
* Vout(T) : typical value of Vout1
* Remarks : test circuit No
15 - 4
12
17
kHz
3
245
330
mΩ
4
1
μA
5
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
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
12
17
kHz
3
220
300
mΩ
4
1
μA
5
: input voltage to VOUT pin
* Vout
* Vout(T) : typical value of Vout1
* Remarks : test circuit No
■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"
* Vout : input voltage to VOUT pin
* Vce : input voltage to CE pin
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
* Vout(T) : typical value of Vout1
* Remarks : test circuit No
15 - 5
510
80
0.8
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
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"
* Vout : input voltage to VOUT pin
* Vce : input voltage to CE pin
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"
* Vout : input voltage to VOUT pin
* Vce : input voltage to CE pin
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
* Vout(T) : typical value of Vout1
* Remarks : test circuit No
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
* Vout(T) : typical value of Vout1
* Remarks : test circuit No
15 - 6
510
80
0.8
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
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"
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
CE Input current "H"
CE Input current "L"
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
* Vout(T) : typical value of Vout1
* Remarks : test circuit No
* Vout : input voltage to VOUT pin
* Vce : input voltage to CE pin
■Test circuits
1. Vout1, Vout2, Vst
㪉㪅㪉㱘㪝
㪭㫀㫅
㪂
2. Iss1, Iss2, Isd
㪘
㪣㪯
㪜㪣㪤㪐㪉㫏㫏㫏㫏
㪭㪦㪬㪫
㪚㪜
㪠㫊㫊㪈㪃㩷㪠㫊㫊㪉
㪦㪬㪫
㪂
㪭㫀㫅
㪩㪣 㪭
㪈㪇㪋
㪭㪪㪪
㪜㪣㪤㪐㪉㫏㫏㫏㫏
㪭㪪㪪
3. Fosc, Duty, Fimt (LX pin)
㪚㪜
㪭㪦㪬㪫
㪭㫀㫅
㪈㪇㪋
㪜㪣㪤㪐㪉㫏㫏㫏㫏
㪭㪪㪪
㪊㪊㪇㱅
㪣㪯
* Fosc, Duty : Vin=Vout(T)×0.95
* Fimt : Vin=Vout1(1.005 to 1.020)
15 - 7
㪚㪜
㪠㪪㪛
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
4. RON
㪪㫎㫀㫋㪺㪿㫀㫅㪾㩷㫎㪸㫍㪼㩷㫆㪽㩷㪣㫏㩷㫇㫀㫅
㪭㪦㪬㪫
㪚㪜
㪩
㪭㫀㫅
㪈㪇㪋
㪭㫃㫏
㪣㪯
㪜㪣㪤㪐㪉㫏㫏㫏㫏
㪭㪪㪪
* Vlx=3V, R=30Ω
R • Von
* Ron= Vlx-Von Ω
㪭㪦㪥
㪞㪥㪛
5. Ilxl
6. Vceh, Vcel, Iceh, Icel
㪊㪊㪇㱅
㪘
㪚㪜
㪭㪦㪬㪫
㪭㫀㫅
㪈㪇㪋
㪜㪣㪤㪐㪉㫏㫏㫏㫏
㪈㪇㪇㱅
㪣㪯
㪭㪦㪬㪫
㪭㫀㫅
㪣㪯
㪈㪇㪋
㪭㪪㪪
㪜㪣㪤㪐㪉㫏㫏㫏㫏
㪭㪪㪪
㪚㪜
㪘
㪭
㪭㪺㪼
Remarks) CE pin : ELM92xx2x series
■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.
15 - 8
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
ELM9230xx
ELM9250xx
EFFICIENCY - Iout
EFFICIENCY - Iout
100
100
2.4V
70
1.5V
Vin=0.9V
60
1.1V
50
3.6V
90
1.8V
80
EFFICIENCY (%)
EFFICIENCY (%)
90
40
30
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.
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.
15 - 9
ELM92xxxx CMOS 600kHz High output current PWM step-up DC/DC converter
■Marking
SOT-89
㪸
㪹
㪺
㪻
• 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
SOP-89-5
㪸
㪹
㪺
㪻
SON-6
㪸㩷㩷㪹㩷㩷㪺㩷㩷㪻
Mark
2
3
Vout
2.*V
3.*V
Mark
4
5
Vout
4.*V
5.*V
d : the decimal digit of the output voltage
Mark
0
1
2
3
4
Vout
*.0V
*.1V
*.2V
*.3V
*.4V
Mark
5
6
7
8
9
Vout
*.5V
*.6V
*.7V
*.8V
*.9V
• SON-6 package : ELM92xx1C
ELM92xx2C (with CE)
a : the integer digit of the output voltage
Mark
2
3
Vout
2.*V
3.*V
Mark
4
5
Vout
4.*V
5.*V
b : the decimal digit of the output voltage
Mark
0
1
2
3
4
Vout
*.0V
*.1V
*.2V
*.3V
*.4V
Mark
5
6
7
8
9
Vout
*.5V
*.6V
*.7V
*.8V
*.9V
c : Assembly lot No.
A to Z (I, O, X excepted) : ELM92xx1C
0 to 9
: ELM92xx2C (with CE)
d : Assembly lot No.
0 to 9
: ELM92xx1C
A to Z (I, O, X excepted) : ELM92xx2C (with CE)
15 - 10
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 - Vin
Vout - Iout
3.5
3
2.9
3
1.1V 1.5V 1.8V
Vout (V)
Vout (V)
2.8
2.5
Iout=150mA
2
2.7 Vin=0.9V
2.6
60mA
10mA
1.5
1
0
2.5
1
2.4
0.1
2
1
10
Vin (V)
100
1000
Iout (mA)
Vout1 - Top
EFFICIENCY - Iout
2.8
100
Vin=1.5V, Iout=60mA
1.8V
1.5V
80
70
2.75
Vin=0.9V
Vout1(V)
EFFICIENCY (%)
90
60
1.1V
50
40
30
2.7
2.65
20
10
0
0.1
1
10
100
2.6
-20 -10 0
1000
10 20 30 40 50 60 70
Top(°C)
Iout (mA)
Vst - Iout
Load-Transient Response
2
200 ˩s /div
Vst (V)
1.5
-20°C
1
Vout, 50mV/div
+70°C
0.5
Iout
+25°C
100mA
100 ˩A
0
0.1
1
10
100
Iout (mA)
15 - 11
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 - Iout
Vout - Vin
3.3
3.5
3.2
3
1.5V 1.8V
1.1V
Vout (V)
Vout (V)
3.1
2.5
Iout=150mA
2
Vin=0.9V
2.9
60mA
10mA
1.5
2.4V
3
2.8
1
0
1
2
2.7
0.1
3
1
Vin (V)
100
1000
Vout1 - Top
EFFICIENCY - Iout
3.1
100
Vin=1.5V, Iout=60mA
2.4V
90
1.8V
80
3.05
70
Vin=0.9V
1.5V
Vout1(V)
EFFICIENCY (%)
10
Iout(mA)
1.1V
60
50
40
30
3
2.95
20
10
0
0.1
1
10
100
2.9
-20 -10 0
1000
10 20 30 40 50 60 70
Top(°C)
Iout (mA)
Vst - Iout
Load-Transient Response
2
200 ˩s /div
Vst (V)
1.5
-20°C
Vout, 50mV/div
1
+70°C
0.5
Iout
+25°C
100mA
100 ˩A
0
0.1
1
10
100
Iout (mA)
15 - 12
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 - Iout
Vout - Vin
4
3.6
3.5
3.5
1.1V 1.5V 1.8V
Vout (V)
Vout (V)
3.4
3
Iout=150mA
2.5
10mA
1.5
0
3.3 Vin=0.9V
3.2
60mA
2
2.4V
3.1
1
2
3
0.1
3
1
Vin (V)
100
1000
Vout1 - Top
EFFICIENCY - Iout
3.4
100
90
Vin=1.5V, Iout=60mA
2.4V
80
1.8V
1.5V
70
3.35
Vout1(V)
EFFICIENCY (%)
10
Iout (mA)
Vin=0.9V
60
1.1V
50
40
30
3.3
3.25
20
10
0
0.1
1
10
100
3.2
-20 -10 0
1000
10 20 30 40 50 60 70
Top(°C)
Iout (mA)
Load-Transient Response
Vst - Iout
2
200 ˩s /div
Vst (V)
1.5
-20°C
Vout, 50mV/div
1
+70°C
0.5
Iout
+25°C
100mA
100 ˩A
0
0.1
1
10
100
Iout (mA)
15 - 13
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 - Iout
Vout - Vin
5.5
5.5
5.4
5
5.3
Vout (V)
Vout (V)
5.2
4.5
Iout=150mA
4
5.1
3.0V
5
4.9
1.8V
1.1V
4.8
60mA
3.5
4.7
10mA
3
0
4.6
1
2
4.5
0.1
3
1
Vin (V)
10
100
1000
Iout (mA)
EFFICIENCY - Iout
Vout1 - Top
100
5.2
90
Vin=3.0V, Iout=60mA
3.0V
80
1.8V
70
5.1
1.5V
60
Vin=0.9V
50
Vout1(V)
EFFICIENCY (%)
1.5V
Vin=0.9V
1.1V
40
30
5
4.9
20
10
0
0.1
1
10
100
4.8
-20 -10 0
1000
10 20 30 40 50 60 70
Iout (mA)
Top(°C)
Vst - Iout
Load-Transient Response
2
200 ˩s /div
Vst (V)
1.5
-20°C
Vout, 50mV/div
1
+70°C
0.5
Iout
+25°C
100mA
100 ˩A
0
0.1
1
10
100
Iout (mA)
15 - 14
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)
• ELM92xxxx (L=2.2μH, Cout=47μF, D=MA735, Top=25°C)
Fosc - Top
Duty - Top
95
700
680
90
640
Duty (%)
Fosc (kHz)
660
620
600
580
560
85
80
540
520
500
-20 -10 0
75
-20 -10 0
10 20 30 40 50 60 70
Top (°C)
10 20 30 40 50 60 70
Top (°C)
Vceh - Vout
Vcel - Vout
0.8
0.8
0.7
0.7
Top= -20°C
0.5
+70°C
0.4
0.3
0.3
3
4
5
0.2
2
6
Vout(V)
+25°C
0.5
0.4
0.2
2
Top= -20°C
0.6
+25°C
Vcel(V)
Vceh(V)
0.6
+70°C
3
4
Vout(V)
15 - 15
5
6