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ST5R25M

MICROPOWER VFM STEP-UP DC/DC CONVERTER

STMicroelectronics 

ST5R00

ELECTRICAL CHARACTERISTICS FOR ST5R25

(VIN = 1.5V, IOUT = 10mA TA = 25oC unless otherwise specified. For external components value, unless

otherwise notes, refer to the typical operating circuit.

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

VOUT Output Voltage

2.375 2.5 2.625 V

VSTART-UP Start-up Voltage (VIN-VF) (1) IOUT=1mA VIN rising from 0 to 2V

0.8

1.2

V

VHOL D Hold-on Voltage

IOUT=1mA VIN falling from 2 to 0V

0.6

V

ISUPPLY Supply Current

To be measured at VIN, no load

16

µA

RLX(DSON) Internal Switch RDSON

IL X(lea k) Internal Leakage Current

ILX=150mA

VLX=4V, forced VOUT=3V

850

mΩ

0.5

µA

Fo sc Maximum oscillator Frequency

Dty Oscillator Duty Cycle

to be measure on Lx pin

150

kHz

77

%

ν

Efficency

IOUT=50mA

(1): The minimum input voltage for the IC start-up is strictly a function of the V F catch diode.

82

%

ELECTRICAL CHARACTERISTICS FOR ST5R28

(VIN = 1.7V, IOUT = 10mA TA = 25oC unless otherwise specified. For external components value, unless

otherwise notes, refer to the typical operating circuit.

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

VOUT Output Voltage

2.66 2.8 2.94

V

VSTART-UP Start-up Voltage (VIN-VF) (1) IOUT=1mA VIN rising from 0 to 2V

0.8

1.2

V

VHOL D Hold-on Voltage

IOUT=1mA VIN falling from 2 to 0V

0.6

V

ISUPPLY Supply Current

To be measured at VIN, no load

16

µA

RLX(DSON) Internal Switch RDSON

ILX=150mA

850

mΩ

IL X(lea k) Internal Leakage Current

VLX=4V, forced VOUT=3.3V

0.5

µA

Fo sc Maximum oscillator Frequency

150

kHz

Dty Oscillator Duty Cycle

to be measure on Lx pin

77

%

ν

Efficency

IOUT=50mA

(1): The minimum input voltage for the IC start-up is strictly a function of the V F catch diode.

82

%

ELECTRICAL CHARACTERISTICS FOR ST5R30

(VIN = 1.8V, IOUT = 10mA TA = 25oC unless otherwise specified. For external components value, unless

otherwise notes, refer to the typical operating circuit.

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

VOUT Output Voltage

VSTART-UP Start-up Voltage (VIN-VF) (1)

IOUT=1mA VIN rising from 0 to 2V

2.85

3

3.15

V

0.8

1.2

V

V HOL D

ISUPPLY

R L X( D SON )

IL X(lea k)

Fosc

Hold-on Voltage

IOUT=1mA VIN falling from 2 to 0V

Supply Current

To be measured at VIN, no load

Internal Switch RDSON

ILX=150mA

Internal Leakage Current

VLX=4V, forced VOUT=3.5V

Maximum oscillator Frequency

0.6

V

17

µA

850

mΩ

0.5

µA

150

kHz

Dty Oscillator Duty Cycle

to be measure on Lx pin

77

%

ν

Efficency

IOUT=50mA

(1): The minimum input voltage for the IC start-up is strictly a function of the V F catch diode.

83

%

4/13

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