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ST730AB

5V STEP-DOWN, CURRENT-MODE PWM DC-DC CONVERTERS

STMicroelectronics 

ST730A

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 = 6 to 11V IO =0 to 450mA

∆VO Line Regulation

VCC = 5.2 to 11V

∆VO Load Regulatio

IO = 0 to 450mA

η Power Efficency

IO =300mA

ISUPPLY Supply Current

ON Mode

OFF Mode, SHDN=0

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

ILX LX Leakage Current

VCC = 12V

VLX = 0V

VREF Reference Voltage

TA = 25°C

∆VREF Temperature Reference

Drift

fOSC Switching Frequency

B series

C series

RC Compensation Pin

Impedance

4

4.75

2

5

0.15

0.005

92

0.8

0.3

11

5.25

2.5

100

0.25

1

V

V

%/V

%/mA

%

mA

µA

V

V

µA

2.7

3

V

0.5

Ω

1

µA

1.17 1.24 1.31

V

50

ppm/°C

180

160

200

220

280

KHz

7500

Ω

TYPICAL APPLICATION CIRCUIT

4/9

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