cmos pfm step-up dc/dc converter and controller · 2019-04-23 · elm91xx1xa is cmos pfm control...

http://www.elm-tech.com

Rev.1.31 /

ELM91xxxxA CMOS PFM Step-up DC/DC converter and controller

■General description

Parameter Symbol Limit UnitApply voltage to LX pin Vlx Vss-0.3 to 7.0 VApply voltage to VOUT pin Vout Vss-0.3 to 7.0 VOutput current of LX pin Ilx 500 mAOutput current of EXT pin Iext 20 mA

Power dissipation Pd500 (SOT-89)

mW250 (SOT-23) 150 (SC-70-5)(SOT-353)

Operationg temperature Top -40 to +85 °CStorage temperature Tstg -55 to +125 °C

• Output voltage range : 1.8V to 5.5V (by 0.1V)• Low voltage operation : 0.9V(ELM91xx1xA: Iout=1mA)• Oscillating frequency : Typ.100kHz• Low power operation : Typ.40µW(ELM91301xA: Typ.100kHz)• High efficiency : 85%(ELM9130xxA: Vin=1.5V, Iout=10mA) • Output current(e.g.) : 100mA(Vin=1.5V, Vout=3.0V)• Package : SOT-89, SOT-23, SC-70-5(SOT-353)

• Constant voltage source for battery- operated devices• Portable communication equipments and video recorders

ELM91xxxxA-xSymbol

a, b Output voltagee.g. :18: Vout=1.8V 30: Vout=3.0V33: Vout=3.3V 50: Vout=5.0V

c Switching transistor 1: Internal switch3: External switch

d PackageA: SOT-89B: SOT-23C: SC-70-5(SOT-353)

e Product version Af Taping direction S , N: Refer to PKG file

ELM91 x x x x A - x ↑ ↑ ↑ ↑ ↑ ↑ a b c d e f

■Features

■Maximum absolute ratings

■Selection guide

■Application

ELM91xx1xA is CMOS PFM control step-up DC-DC converter; ELM91xx3xA is CMOS PFM control step-up DC-DC controller, which has large output current capacity by using an external FET switch. ELM91 series consists of reference voltage source, error amplifier, oscillation circuit, start-up circuit, PFM-control circuit, switching current limit circuit (ELM91xx1xA only), switching transistor (ELM91xx1xA only) and output voltage setting resistor. For external parts, coil, diode, MOSFET and capacitor are possible choices. The standard output voltages are 1.8V,3.0V,3.3V,5.0V; ELM91 series can also be designed as semi-custom IC within the range of 1.8V to 5.5V by 0.1V step.

22


Rev.1.32 /

SOT-89(TOP VIEW) SOT-23(TOP VIEW) SC-70-5(TOP VIEW)

ELM91xxxAA ELM91xxxBA ELM91xxxCAPin No. Pin name

1 VSS2 VOUT

3 ELM91xx1AA: LXELM91xx3AA: EXT

Pin No. Pin name1 VSS

2 ELM91xx1BA: LXELM91xx3BA: EXT

3 VOUT

Pin No. Pin name1 NC2 VOUT3 NC4 VSS5 LX, EXT

■Pin configuration

■Standard circuit


+Cout

MA2Z748

Vin VoutLX VOUT

VSS

+Cin

ELM91xx1xA100 H�

47 F� 47 F�

+ELM91xx3xA

MA735Vin

VoutEXT VOUT+

VSS

Cin

Cout100 F�

100 F�

33 H�

ELM91xx1xA ELM91xx3xA

■Block diagram

22


Rev.1.33 /

L=100μH, Cin=Cout=47μF, D=MA2Z748, Vss=0V, Top=25°CParameter Symbol Condition Min. Typ. Max. Unit

Output voltage Vout Iout=1mA, Vin=1.5V 1.755 1.800 1.845 VInput voltage Vin 0.9 6.0 VStarting voltage Vst Iout=1mA 0.9 VHolding voltage Vhold Iout=1mA 0.7 VCurrent consumption 1 Iss1 Vout=Vout(T)×0.95 10 25 μACurrent consumption 2 Iss2 Vout=Vout(T)+0.5V 2 5 μAOn-resistance of LX switch Ron Vout=Vout(T)×0.95 1.5 3.0 ΩLeakage current of LX pin Ilxl Vout=Vlx=6V 1 μAOscillating frequency Fosc Vout=Vout(T)×0.95 80 100 120 kHzVoltage limit of LX pin(LX switch ON) Vlxlim Vout=Vout(T)×0.95 0.5 0.7 0.9 V

Duty ratio Duty Vout=Vout(T)×0.95 67 75 83 %

■Electrical characteristics (ELM91xx1xA)

ELM91181xA

* Vout: Input voltage to out pin; Vout(T): Typ. value of Vout.

Parameter Symbol Condition Min. Typ. Max. UnitOutput voltage Vout Iout=1mA, Vin=1.5V 3.218 3.300 3.382 VInput voltage Vin 0.9 6.0 VStarting voltage Vst Iout=1mA 0.9 VHolding voltage Vhold Iout=1mA 0.7 VCurrent consumption 1 Iss1 Vout=Vout(T)×0.95 15 35 μACurrent consumption 2 Iss2 Vout=Vout(T)+0.5V 2 5 μAOn-resistance of LX switch Ron Vout=Vout(T)×0.95 0.9 1.9 ΩLeakage current of LX pin Ilxl Vout=Vlx=6V 1 μAOscillating frequency Fosc Vout=Vout(T)×0.95 80 100 120 kHzVoltage limit of LX pin(LX switch ON) Vlxlim Vout=Vout(T)×0.95 0.5 0.7 0.9 V


L=100μH, Cin=Cout=47μF, D=MA2Z748, Vss=0V, Top=25°CELM91331xA


Parameter Symbol Condition Min. Typ. Max. UnitOutput voltage Vout Iout=1mA, Vin=1.5V 2.925 3.000 3.075 VInput voltage Vin 0.9 6.0 VStarting voltage Vst Iout=1mA 0.9 VHolding voltage Vhold Iout=1mA 0.7 VCurrent consumption 1 Iss1 Vout=Vout(T)×0.95 14 35 μACurrent consumption 2 Iss2 Vout=Vout(T)+0.5V 2 5 μAOn-resistance of LX switch Ron Vout=Vout(T)×0.95 0.9 1.9 ΩLeakage current of LX pin Ilxl Vout=Vlx=6V 1 μAOscillating frequency Fosc Vout=Vout(T)×0.95 80 100 120 kHzVoltage limit of LX pin(LX switch ON) Vlxlim Vout=Vout(T)×0.95 0.5 0.7 0.9 V





22


Rev.1.34 /

Parameter Symbol Condition Min. Typ. Max. UnitOutput voltage Vout Iout=1mA, Vin=3V 4.875 5.000 5.125 VInput voltage Vin 0.9 6.0 VStarting voltage Vst Iout=1mA 0.9 VHolding voltage Vhold Iout=1mA 0.7 VCurrent consumption 1 Iss1 Vout=Vout(T)×0.95 20 45 μACurrent consumption 2 Iss2 Vout=Vout(T)+0.5V 2 5 μAOn-resistance of LX switch Ron Vout=Vout(T)×0.95 0.7 1.5 ΩLeakage current of LX pin Ilxl Vout=Vlx=6V 1 μAOscillating frequency Fosc Vout=Vout(T)×0.95 80 100 120 kHzVoltage limit of LX pin(LX switch ON) Vlxlim Vout=Vout(T)×0.95 0.5 0.7 0.9 V




Parameter Symbol Condition Min. Typ. Max. UnitOutput voltage Vout Iout=1mA, Vin=1.5V 1.755 1.800 1.845 VInput voltage Vin 0.9 6.0 VStarting voltage Vst Iout=1mA 1.1 VHolding voltage Vhold Iout=1mA 0.7 VCurrent consumption 1 Iss1 Vout=Vout(T)×0.95, EXT: No-Load 10 25 μACurrent consumption 2 Iss2 Vout=Vout(T)+0.5V 2 5 μAOn-resistance of EXT “High” Rexth Vout=Vout(T)×0.95, Vext=Vout-0.4V 90 170 ΩOn-resistance of EXT “Low” Rextl Vout=Vout(T)×0.95, Vext=0.4V 70 120 ΩOscillating frequency Fosc Vout=Vout(T)×0.95 80 100 120 kHzDuty ratio Duty Vout=Vout(T)×0.95 67 75 83 %

FET=ELM37400FA, L=33μH, Cin=Cout=100μF, D=MA735, Vss=0V, Top=25°CELM91183xA

Parameter Symbol Condition Min. Typ. Max. UnitOutput voltage Vout Iout=1mA, Vin=1.5V 2.925 3.000 3.075 VInput voltage Vin 0.9 6.0 VStarting voltage Vst Iout=1mA 1.1 VHolding voltage Vhold Iout=1mA 0.7 VCurrent consumption 1 Iss1 Vout=Vout(T)×0.95, EXT: No-Load 14 35 μACurrent consumption 2 Iss2 Vout=Vout(T)+0.5V 2 5 μAOn-resistance of EXT “High” Rexth Vout=Vout(T)×0.95, Vext=Vout-0.4V 50 86 ΩOn-resistance of EXT “Low" Rextl Vout=Vout(T)×0.95, Vext=0.4V 36 60 ΩOscillating frequency Fosc Vout=Vout(T)×0.95 80 100 120 kHzDuty ratio Duty Vout=Vout(T)×0.95 67 75 83 %




■Electrical characteristics (ELM91xx3xA)


22


Rev.1.35 /

Parameter Symbol Condition Min. Typ. Max. UnitOutput voltage Vout Iout=1mA, Vin=1.5V 3.218 3.300 3.382 VInput voltage Vin 0.9 6.0 VStarting voltage Vst Iout=1mA 1.1 VHolding voltage Vhold Iout=1mA 0.7 VCurrent consumption 1 Iss1 Vout=Vout(T)×0.95, EXT: No-Load 15 35 μACurrent consumption 2 Iss2 Vout=Vout(T)+0.5V 2 5 μAOn-resistance of EXT “High” Rexth Vout=Vout(T)×0.95, Vext=Vout-0.4V 46 83 ΩOn-resistance of EXT “Low” Rextl Vout=Vout(T)×0.95, Vext=0.4V 33 55 ΩOscillating frequency Fosc Vout=Vout(T)×0.95 80 100 120 kHzDuty ratio Duty Vout=Vout(T)×0.95 67 75 83 %



Parameter Symbol Condition Min. Typ. Max. UnitOutput voltage Vout Iout=1mA, Vin=3V 4.875 5.000 5.125 VInput voltage Vin 0.9 6.0 VStarting voltage Vst Iout=1mA 1.1 VHolding voltage Vhold Iout=1mA 0.7 VCurrent consumption 1 ISS1 Vout=Vout(T)×0.95, EXT: No-Load 20 45 μACurrent consumption 2 ISS2 Vout=Vout(T)+0.5V 2 5 μAOn-resistance of EXT "High" Rexth Vout=Vout(T)×0.95, Vext=Vout-0.4V 33 59 ΩOn-resistance of EXT "Low" Rextl Vout=Vout(T)×0.95, Vext=0.4V 24 45 ΩOscillating frequency Fosc Vout=Vout(T)×0.95 80 100 120 kHzDuty ratio Duty Vout=Vout(T)×0.95 67 75 83 %



■Marking

SOT-89

• SOT-89, SOT-23 package : ELM91xx1xA ELM91xx3xA

SOT-23

a to c : Assembly lot No. A to Z (I, O, X excepted) and 0 to 9

• SC-70-5 package : ELM91xxxCA

SC-70-5

a to d : Assembly lot No. A to Z (I, O, X excepted) and 0 to 9


22


Rev.1.36 /

■External parts

1) Coil

2) Diode

To design DC/DC converters using ELM91xx1xA series, coil, diode, and capacitor are necessary. Except these external parts, switching transistor is also needed when using ELM91xx3xA. Please locate external parts to IC as close as possible, and lower the impedance of ground line. (Please refer to standard circuit)

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.The typical characteristics graphics of ELM91xx1xA series is done by following coil : SLF7045(TDK)The typical characteristics graphics of ELM91xx3xA series is done by following coil : SLF10145(TDK)

When choosing diode, please select that whose forward voltage is small, switching speed is high and which has sufficient margin for rated current. For ELM91 series, ELM recommends schottoky diodes.

3) CapacitorWhen 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 ELM91 series. For ELM91 series, ELM recommends Aluminum electrolytic or Tantalum capacitor.Under operating conditions using capacitor with low ESR such as ceramic capacitor, larger output voltage ripple may happen and thus result in intermittent switching. To prevent output voltage ripple from becoming larger, please connect resistor { 0.1 ohm ~ a few ohm } in series with output capacitor. The output voltage of ELM91xx3xA may lower when the load current is large. To prevent this, please use output capacitor with comparatively large capacity. Following characteristics graphics are made with ELM91303xA, when Vin=1.5V.{Cin=100μF(Ta), L=33μH}

0 100 200 300 400 500 600 700 8001

1.5

2

2.5

3

3.5

100�F(Ta)

330�F(Ta)

Vout-Iout

Iout (mA)

Vou

t (V

)

1000�F(AL)

200 400 600 800 10000

100

200

300

400

500

600

100�F(Ta)

1000�F(AL)

RIPPLE VOLTAGE-Iout

Iout (mA)

RIP

PLE

VO

LTA

GE

(mV

)

330�F(Ta)

0 100 200 300 400 500 600 700 80040

50

60

70

80

90

100

100�F(Ta)

1000�F(AL)

EFFICIENCY-Iout

Iout (mA)

EFFI

CIE

NC

Y (%

)

330�F(Ta)


22


Rev.1.37 /

0 0.5 1 1.5 20.5

1

1.5

2

2.5

Vin (V)

Vou

t(V

)

Iout=1mA

Iout=10mAIout=40mA

Vout-Vin

0.1 1 10 100 10000.5

1

1.5

2

2.5

Iout (mA)

Vou

t(V

) Vin=0.9V

1.1V

1.3V

Vout-Iout

1.5V

0.1 1 10 100 100040

50

60

70

80

90

100

Iout (mA)

EFFI

CIE

NC

Y(%

)

Vin=0.9V

1.1V

1.3V

EFFICIENCY-Iout

1.5V

0 20 40 60 80 100 120 140 160 180 2000

20

40

60

80

100

Iout (mA)

RIP

PLE

VO

LTA

GE(

mV

)

Vin=0.9V

1.1V

1.3V

RIPPLE VOLTAGE-Iout

1.5V

■Typical characteristics (ELM91xx1xA)

• ELM91181xA(L=100μH, Cin=Cout=47μF, D=MA2Z748, Top=25°C)


22


Rev.1.38 /

0 100 200 300 400 500 600 700 800 900

1.75

1.8

1.85

1.9

1.95

2

Time(μS)

Out

put V

olta

ge(V

)

Load Transient Response

Output Voltage

Output Current

50mA

1mA

0 100 200 300 400 500 600 700 800 900

1.75

1.8

1.85

1.9

1.95

2

Time(μS)O

utpu

t Vol

tage

(V)


Output Voltage

Output Current

50mA

1mA

0 3 6 9 12 150.5

0.6

0.7

0.8

0.9

1

1.1

Iout (mA)

Vst

(V)

Vst-Iout

0 3 6 9 12 150

100

200

300

400

500

600

700

800

900

Iout (mA)

Vho

ld(m

V)

Vhold-Iout


22


Rev.1.39 /

0 0.5 1 1.5 2 2.5 30.5

1

1.5

2

2.5

3

3.5

Vin (V)

Vou

t(V

) Iout=1mAIout=10mA

Iout=40mA

Vout-Vin

0.1 1 10 100 10001.5

2

2.5

3

3.5

Iout (mA)

Vou

t(V

)

Vin=0.9V

1.1V

1.8V

Vout-Iout

1.5V

2.4V

0.1 1 10 100 100040

50

60

70

80

90

100

Iout (mA)

EFFI

CIE

NC

Y(%

)

Vin=0.9V

1.1V

1.8V

EFFICIENCY-Iout

1.5V

2.4V

0 20 40 60 80 100 120 140 160 180 2000

20

40

60

80

100

120

140

160

180

200

Iout(mA)

RIP

PLE

VO

LTA

GE(

mV

)

Vin=0.9V

1.1V

1.8V

RIPPLE VOLTAGE-Iout

1.5V

2.4V



22


Rev.1.310 /

0 100 200 300 400 500 600 700 800 900

2.95

3

3.05

3.1

3.15

3.2

Out

put V

olta

ge(V

)


Time(μS)

Output Voltage

Output Current

50mA

1mA

0 100 200 300 400 500 600 700 800 900

2.95

3

3.05

3.1

3.15

3.2

Time(μS)O

utpu

t Vol

tage

(V)


Output Current

50mA

1mA

Output Voltage

0 3 6 9 12 150.5

0.6

0.7

0.8

0.9

1

1.1

Iout (mA)

Vst

(V)

Vst-Iout

0 3 6 9 12 150

100

200

300

400

500

600

700

800

900

Iout(mA)

Vho

ld(m

V)

Vhold-Iout


22


Rev.1.311 /

0 0.5 1 1.5 2 2.5 30.5

1

1.5

2

2.5

3

3.5

4

Vin (V)

Vou

t(V

)

Iout=1mA

Iout=10mA

Iout=40mA

Vout-Vin

0.1 1 10 100 10001.5

2

2.5

3

3.5

4

Iout (mA)

Vou

t(V

)

Vin=0.9V

1.1V

1.8V

Vout-Iout

1.5V

2.4V

0.1 1 10 100 100040

50

60

70

80

90

100

Iout (mA)

EFFI

CIE

NC

Y(%

)

Vin=0.9V

1.1V

1.8V

EFFICIENCY-Iout

1.5V

2.4V

0 20 40 60 80 100 120 140 160 180 2000

20

40

60

80

100

120

140

160

180

200

Iout (mA)

RIP

PLE

VO

LTA

GE(

mV

)

Vin=0.9V

1.1V

1.8V

RIPPLE VOLTAGE-Iout

1.5V

2.4V



22


Rev.1.312 /

0 100 200 300 400 500 600 700 800 900

3.25

3.3

3.35

3.4

3.45

3.5

Out

put V

olta

ge(V

)

Time(μS)

Output Voltage


Output Current

50mA

1mA

0 100 200 300 400 500 600 700 800 900

3.25

3.3

3.35

3.4

3.45

3.5

Time(μS)O

utpu

t Vol

tage

(V)


Output Voltage

Output Current

50mA

1mA

0 3 6 9 12 150.5

0.6

0.7

0.8

0.9

1

1.1

Iout (mA)

Vst

(V)

Vst-Iout

0 3 6 9 12 150

100

200

300

400

500

600

700

800

900

1000

Iout (mA)

Vho

ld(m

V)

Vhold-Iout


22


Rev.1.313 /

0 0.5 1 1.5 2 2.5 30.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

Vin (V)

Vou

t(V

)

Iout=1mAIout=10mA

Iout=40mA

Vout-Vin

0.1 1 10 100 10003

3.5

4

4.5

5

5.5

Iout (mA)

Vou

t(V

)

Vin=0.9V

1.1V

1.8V

Vout-Iout

1.5V

3.0V

0.1 1 10 100 100040

50

60

70

80

90

100

Iout (mA)

EFFI

CIE

NC

Y(%

)

Vin=0.9V

1.1V

1.8V

EFFICIENCY-Iout

1.5V

3.0V

0 20 40 60 80 100 120 140 160 180 2000

20

40

60

80

100

120

140

160

Iout (mA)

RIP

PLE

VO

LTA

GE(

mV

)

Vin=0.9V

1.1V

1.8V

RIPPLE VOLTAGE-Iout

1.5V

3.0V



22


Rev.1.314 /

0 100 200 300 400 500 600 700 800 900

4.95

5

5.05

5.1

5.15

5.2

Out

put V

olta

ge(V

)


Time(μS)

Output Voltage

0 100 200 300 400 500 600 700 800 900

4.95

5

5.05

5.1

5.15

5.2

Time(μS)O

utpu

t Vol

tage

(V)


Output Voltage

Output Current

50mA

1mA

0 3 6 9 12 150.5

0.6

0.7

0.8

0.9

1

1.1

Iout (mA)

Vst

(V)

Vst-Iout

0 3 6 9 12 15

200

400

600

800

1000

1200

1400

1600

1800

2000

Iout (mA)

Vho

ld(m

V)

Vhold-Iout


22


Rev.1.315 /

• ELM91183xA (FET=ELM37400FA, L=33μH, Cin=Cout=100μF, D=MA735, Vss=0V, Top=25°C)

��

0 0.5 1 1.5 20.5

1

1.5

2

2.5

Iout=300mA

Iout=100mA

Iout=10mA

Vout-Vin

Vin (V)

Vou

t (V

)

� ��

��

0.1 1 10 100 10000.5

1

1.5

2

2.5

Vin=0.9V

Vin=1.1V

Vin=1.5V

Vout-Iout

Vou

t (V

)Vin=1.3V

0.1 1 10 100 100040

50

60

70

80

90

100

Vin=0.9V

Vin=1.1V

Vin=1.5V

EFFICIENCY-Iout

Iout (mA)

EFFI

CIE

NC

Y (%

)

Vin=1.3V

0 200 400 600 800 10000

100

200

300

400

500

600

700

800

Vin=0.9V

Vin=1.1V

Vin=1.5V

RIPPLE VOLTAGE-Iout

Iout (mA)

RIP

PLE

VO

LTA

GE

(mV

) Vin=1.3V

■Typical characteristics (ELM91xx3xA)


22


Rev.1.316 / ��

0 200 400 600 800 10001.5

1.55

1.6

1.65

1.7

1.75

1.8

1.85

1.9

1.95

Vout


Time (�s)

Vou

t (V

)

Iout

1mA

100mA

Vin=1.2V

��

0 200 400 600 800 10001.5

1.55

1.6

1.65

1.7

1.75

1.8

1.85

1.9

1.95

Vout


Time (�s)

Vou

t (V

)

Iout

1mA

100mA

Vin=1.2V

0 20 40 60 80 1000.8

0.9

1

1.1

1.2

1.3Vst-Iout

Iout (mA)

Vst

(V)

0 20 40 60 80 1000

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8Vhold-Iout

Iout (mA)

Vho

ld (V

)


22


Rev.1.317 /


��

0 0.5 1 1.5 2 2.5 31

1.5

2

2.5

3

3.5

Iout=300mA

Iout=100mA

Iout=10mA

Vout-Vin

Vin (V)

Vou

t (V

)

� ��

��

0.1 1 10 100 10001

1.5

2

2.5

3

3.5

Vin=0.9V

Vin=1.1V

Vin=2.4V

Vout-Iout

Vou

t (V

)

Vin=1.5V

Vin=1.8V

0.1 1 10 100 100040

50

60

70

80

90

100

Vin=0.9V

Vin=1.1V

Vin=2.4V

EFFICIENCY-Iout

Iout (mA)

EFFI

CIE

NC

Y (%

)

Vin=1.5V

Vin=1.8V

200 400 600 800 10000

100

200

300

400

500

600

700

800

Vin=0.9V

Vin=1.1V

Vin=2.4V

RIPPLE VOLTAGE-Iout

Iout (mA)

RIP

PLE

VO

LTA

GE

(mV

)

Vin=1.5V

Vin=1.8V


22


Rev.1.318 / ��

��

0 200 400 600 800 10002.7

2.75

2.8

2.85

2.9

2.95

3

3.05

3.1

3.15

Vout


Time (�s)

Vou

t (V

)

Iout

1mA

100mA

Vin=1.5V

0 200 400 600 800 10002.7

2.75

2.8

2.85

2.9

2.95

3

3.05

3.1

3.15

Vout


Vou

t (V

)

Iout

1mA

100mA

Vin=1.5V

0 20 40 60 80 1000.8

0.9

1

1.1

1.2

1.3Vst-Iout

Iout (mA)

Vst

(V)

0 20 40 60 80 1000

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1Vhold-Iout

Iout (mA)

Vho

ld (V

)


22


Rev.1.319 /


��

0 0.5 1 1.5 2 2.5 3 3.51

1.5

2

2.5

3

3.5

4

Iout=300mA

Iout=100mA

Iout=10mA

Vout-Vin

Vin (V)

Vou

t (V

)

� ��

��

0.1 1 10 100 10001.5

2

2.5

3

3.5

4

Vin=0.9V

Vin=1.1V

Vin=2.4V

Vout-Iout

Vou

t (V

)Vin=1.5V

Vin=1.8V

0.1 1 10 100 100040

50

60

70

80

90

100

Vin=0.9V

Vin=1.1V

Vin=2.4V

EFFICIENCY-Iout

Iout (mA)

EFFI

CIE

NC

Y (%

)

Vin=1.5V

Vin=1.8V

0 200 400 600 800 10000

100

200

300

400

500

600

700

800

Vin=0.9V

Vin=1.1V

Vin=2.4V

RIPPLE VOLTAGE-Iout

Iout (mA)

RIP

PLE

VO

LTA

GE

(mV

)

Vin=1.5VVin=1.8V


22


Rev.1.320 / ��

��

0 200 400 600 800 10003

3.05

3.1

3.15

3.2

3.25

3.3

3.35

3.4

3.45

Vout


Time (�s)

Vou

t (V

)

Iout

1mA

100mA

Vin=1.5V

0 200 400 600 800 10003

3.05

3.1

3.15

3.2

3.25

3.3

3.35

3.4

3.45

Vout


Vou

t (V

)

Iout

1mA

100mA

Vin=1.5V

0 20 40 60 80 1000.8

0.9

1

1.1

1.2

1.3Vst-Iout

Iout (mA)

Vst

(V)

0 20 40 60 80 1000

0.2

0.4

0.6

0.8

1

1.2Vhold-Iout

Iout (mA)

Vho

ld (V

)


22


Rev.1.321 /


��

0 1 2 3 4 52.5

3

3.5

4

4.5

5

5.5

Iout=300mA

Iout=100mA

Iout=10mA

Vout-Vin

Vin (V)

Vou

t (V

)

� ��

��

0.1 1 10 100 10003

3.5

4

4.5

5

5.5

Vin=0.9V

Vin=1.1V

Vin=3.0V

Vout-Iout

Vou

t (V

)

Vin=1.5V

Vin=1.8V

0.1 1 10 100 100040

50

60

70

80

90

100

Vin=0.9V

Vin=1.1V

Vin=3.0V

EFFICIENCY-Iout

Iout (mA)

EFFI

CIE

NC

Y (%

)

Vin=1.5V

Vin=1.8V

0 200 400 600 800 10000

100

200

300

400

500

600

Vin=0.9VVin=1.1V

Vin=3.0V

RIPPLE VOLTAGE-Iout

Iout (mA)

RIP

PLE

VO

LTA

GE

(mV

)

Vin=1.5V

Vin=1.8V


22


Rev.1.322 / ��

��

0 200 400 600 800 10004.7

4.75

4.8

4.85

4.9

4.95

5

5.05

5.1

5.15

Vout


Time (�s)

Vou

t (V

)

Iout

1mA

100mA

Vin=2.4V

0 200 400 600 800 10004.7

4.75

4.8

4.85

4.9

4.95

5

5.05

5.1

5.15

Vout


Vou

t (V

)

Iout

1mA

100mA

Vin=2.4V

0 20 40 60 80 1000.8

0.9

1

1.1

1.2

1.3Vst-Iout

Iout (mA)

Vst

(V)

0 20 40 60 80 1000

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6Vhold-Iout

Iout (mA)

Vho

ld (V

)


22

cmos pfm step-up dc/dc converter and controller · 2019-04-23 · elm91xx1xa is cmos pfm control...

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