ST1S03AIPUR datasheet(6/14 Pages) STMICROELECTRONICS

部件名	ST1S03AIPUR

功能描述	1.5A, 1.5 MHz Adjustable, with inhibit function Step-down switching regulator in DFN6 3x3

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制造商	STMICROELECTRONICS [STMicroelectronics]

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Electrical characteristics

ST1S03A

6/14

4

Electrical characteristics

Table 4.

Electrical characteristics

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

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

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

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

1.5

mA

VINH < 0.4V

1µA

VINH

Inhibit threshold

Device ON

1.2

V

Device OFF

0.4

IO

Output current

VI = 2.7 to 5.5V

1.5

A

IO

Output current

VI = 2.7 to 5.5V

0.8

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 = 0.8V, TA = 25°C Note: 1

1.2

1.5

1.8

MHz

DMAX

Maximum duty cycle

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

@

IO=Short

Short circuit removal response

IO = 10mA to short, TA = 25°C

Note: 1

-10

+10

%VO

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制造商	部件名	数据表	功能描述
STMicroelectronics	ST1S03AIPUR	276Kb / 14P	1.5 A, 1.5 MHz adjustable, with inhibit function step-down switching regulator

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