ST1S15J18R datasheet(8/27 Pages) STMICROELECTRONICS

Part #	ST1S15J18R

Description	Short-circuit and thermal protection

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Electrical characteristics

ST1S15

8/27

DocID023280 Rev 4

4

Electrical characteristics

- 40 °C < TA < 85 °C, CIN = 4.7 µF nominal, COUT = 4.7 µF nominal, L = 470 nH, typical

values are at TA = 25 °C, VEN = VIN unless otherwise specified.

Table 7: Electrical characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

General section

VIN

Operating input voltage range

2.3

5.5

V

VUVLO

Undervoltage lockout

threshold

VIN rising

2.1

2.2

V

VIN falling

1.8

1.9

IQ

PFM mode quiescent current

No load

45

60

µA

PWM mode quiescent current

No load

15

mA

Shutdown current

VEN = 0

0.5

5

µA

fSW

Switching frequency

5.4

6

6.6

MHz

IOUT

Continuous output current

(1)

VIN ≥ VOUT + 0.40 V

500

mA

ISC

Short-circuit current

(2)

1200

mA

IPFM-PWM

PFM to PWM transition

VIN = 3.6 V, VOUT = 1.82 V

200

mA

PWM to PFM transition

100

h

Efficiency

(VIN = 3.6 V, VOUT = 1.82 V)

IOUT = 10 mA PFM mode

80

%

IOUT = 150 mA

83

tON

Start-up time

VEN from low to high,

VIN = 3.6 V, VOUT = 1.82 V

260

µs

TSHDN

Thermal shutdown

125

°C

Hysteresis

30

°C

Output voltage

VOUT

Accuracy (ST1S15J18)

2.3 ≤ VIN ≤ 5.5 V,

IOUT= 10 mA, PWM mode,

-

40 ≤ TA ≤ 85 °C

1.78

1.82

1.86

V

2.3 ≤ VIN ≤ 5.5 V,

IOUT= 10 mA, PFM mode,

-

40 ≤ TA ≤ 85 °C

1.78

1.82

1.86

Load regulation

2.3 ≤ VIN ≤ 5.5 V,

VOUT=1.82 V, IOUT = 0 to

500 mA, PWM mode,

-

40 ≤ TA ≤ 85 °C

-1.5

%

VOUT_Ripple

Peak-to-peak output voltage

ripple

PWM mode,

IOUT = 150 mA, VIN = 3.6 V,

VOUT = 1.82 V

10

mV

PFM mode,

IOUT = 150 mA, VIN = 3.6 V,

VOUT = 1.82 V

30

mV

ILKFB

FB pin leakage current

VFB = 5.5 V

9

µA

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