ST763 Ver la hoja de datos (PDF) - STMicroelectronics

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componentes Descripción

Fabricante

ST763

3.3V STEP DOWN CURRENT MODE PWM DC-DC CONVERTERS

STMicroelectronics 

ST763A SERIES

ELECTRICAL CHARACTERISTICS (VCC=5V, IO = 0mA, TA = TMIN to TMAX, unless otherwise specified.)

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

VCC Input Voltage

VO Output Voltage

VCC = 4 to 11V IO =0 to 300mA

VCC = 4.75 to 11V IO =0 to 500mA

∆VO Line Regulation

∆VO Load Regulatio

IO = 1 to 500mA

η Power Efficency

IO =300mA

IO =100mA

ISUPPLY Supply Current

ON Mode (Including Switch Current)

OFF Mode

VIH SHDN Input High Threshold

VIL SHDN Input Low Threshold

ISHDN Shutdown Input Leakage

Current

VLOCK Under Voltage Lockout

VCC Falling

RDS(on) LX On Resistance

ILX=500mA

ILEAK LX Leakage Current

VCC = 12V

VLX = 0V

VREF Reference Voltage

TA = 25°C

∆VREF Temeperature Reference

Drift

TA = TMIN to TMAX

fOSC Switching Frequency

RC Compensation Pin

Impedance

3.3

3.135

3.135

2

3.3

3.3

0.13

0.005

88

90

0.6

0.2

11

3.465

3.465

2.5

100

0.25

1

V

V

V

%/V

%/mA

%

%

mA

µA

V

V

µA

2.7

3

V

1

Ω

10

nA

1.18 1.25 1.32

V

50

ppm/°C

159 200 212.5 KHz

7500

Ω

TYPICAL APPLICATION CIRCUIT

0.047 µF

1500 pF

SHDN

Vcc

REF

Lx

SS

GND

CC

OUT

470 pF

22 µH 100 µF

Vin

+

1 µF

STPS330U

Vout

+

220 µF

4/10

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