ST1S03A(2008) 데이터 시트보기 (PDF) - STMicroelectronics

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ST1S03A
(Rev.:2008)

1.5 A, 1.5 MHz adjustable, with inhibit function step-down switching regulator

STMicroelectronics 

Electrical characteristics

4 Electrical characteristics

ST1S03A

Table 5. Electrical characteristics

(VIN_SW = VIN_A = VINH = 5 V, CI = 4.7 µF, CO = 22 µF, L1 = 3.3 µH, TJ = 0 to 125 °C (unless

otherwise specified. Typical values are referred to 25 °C)

Symbol

Parameter

Test conditions

Min. Typ. Max. Unit

FB Feedback voltage

784 800 816 mV

IFB

VFB pin bias current

600 nA

IQ

Quiescent current

VINH > 1.2V

VINH < 0.4V

1.5 mA

1

µA

VINH Inhibit threshold

Device ON

Device OFF

1.2

V

0.4

IO

Output current

VI = 2.7 to 5.5V

1.5

A

IMIN Minimum output current

1

mA

%VO/ΔVI Reference line regulation

VI = 2.7V to 5.5V

0.2

%VO/

ΔVI

%VO/ΔIO Reference load regulation

IO = 10mA to 1.5A

0.2

%VO/

ΔIO

PWMfS PWM switching frequency

VFB = 0.7V, TA = 25°C Note 1

1.2

1.5

1.8 MHz

DMAX Maximum duty cycle

VFB = 0.7V

87

%

ISW Switching current limitation

2.5

A

VDS Switch VDS

ISW = 800mA

200 mV

ν

Efficiency

IO = 10mA to 100mA, VO = 3.3V 70

%

IO = 100mA to 1.5A, VO = 3.3V

85

TSHDN Thermal shutdown

Note 1

130 150

°C

THYS Thermal shutdown hysteresis Note 1

15

°C

%VO/ΔIO Load transient response

IO = 100mA to 1.5A, TA = 25°C

tR = tF ≥ 100ns, Note 1

-3

+3 %VO

%VO/ΔIO

@

Short circuit removal response

IO = 10mA to short, TA = 25°C

-10

IO=Short

Note 1

+10 %VO

Note: 1 Guaranteed by design, but not tested in production

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