ST1S15 datasheet(8/27 Pages) STMICROELECTRONICS

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Electrical characteristics

ST1S15

8/27

DocID023280 Rev 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

VUVLO

Undervoltage lockout

threshold

VIN rising

2.1

2.2

VIN falling

1.8

1.9

PFM mode quiescent current

No load

µA

PWM mode quiescent current

No load

Shutdown current

VEN = 0

0.5

µA

fSW

Switching frequency

5.4

6.6

MHz

IOUT

Continuous output current

(1)

VIN ≥ VOUT + 0.40 V

500

ISC

Short-circuit current

(2)

1200

IPFM-PWM

PFM to PWM transition

VIN = 3.6 V, VOUT = 1.82 V

200

PWM to PFM transition

100

Efficiency

(VIN = 3.6 V, VOUT = 1.82 V)

IOUT = 10 mA PFM mode

IOUT = 150 mA

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

°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

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

PFM mode,

IOUT = 150 mA, VIN = 3.6 V,

VOUT = 1.82 V

ILKFB

FB pin leakage current

VFB = 5.5 V

µA

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