STCF03ITBR datasheet(11/33 Pages) STMICROELECTRONICS

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Electrical characteristics

STCF03I

11/33

6

Electrical characteristics

Table 6. Electrical characteristics

(TJ = 25°C, VI = 3.6 V, 2xCI = 10 µF, CO = 1 µF, L = 4.7 µH, RFL = 0.27 Ω, RTR = 1.8 Ω, RX = 15 KΩ,

Typ. values @25°C, unless otherwise specified).

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VI

Input operation supply voltage

2.7

5.5

V

VPW_ON

RESET

Power ON reset threshold

VI rising

2.3

V

IO

Output current adjustment

range IFLASH

FLASH MODE for VI = 3.3 V to 5.5 V

60

800

mA

FLASH MODE for VI = 2.7 V to 3.3 V

60

600

Output current adjustment

range ITORCH

Torch mode VI = 2.7 V to 5.5 V

15

200

Auxiliary LED output current

adjustment range IAUXLED

Ready mode, VI = 3.3 V to 5.5 V

0

20

VO

Regulated voltage range

2.5

5.3

V

FB1

Feedback voltage

Torch mode

30

250

mV

FB2

Feedback voltage

Flash mode

30

250

mV

ΔIO

Output current tolerance

Flash mode, IO = 160 mV/RFL

-10

10

%

RON_

FB1-FB2 ON resistance

Torch mode, IO = 200 mA

90

m

Ω

IQ

Quiescent current in

SHUTDOWN mode

1µA

Quiescent current in

Ready -mode

1.8

mA

fs

Frequency

VI = 2.7 V

1.8

MHz

ν

Efficiency of the chip itself

VI = 3.2 to 4.2 V, Flash Mode,

IO = 800 mA

87

%

Efficiency of the whole

application

VI = 3.2 to 4.2 V, Flash Mode,

IO = 800 mA, VO=VfLED_max + VFB2 =

5.02 V

See the typical application schematic

It is included losses of inductor and

sensing resistor

76

OVP

Output over voltage protection VI = 5.5 V, No Load

5.5

V

OVHYST

Over voltage hysteresis

VI = 5.5 V, No Load

0.3

V

OTP

Over temperature protection

VI = 5.5 V

140

°C

OTHYST

Over temperature hysteresis

VI = 5.5 V

20

°C

RONT1

RX-NTC switch On resistance

Ready mode

25

Ω

NTCLEAK RX-NTC switch OFF leakage

Shutdown mode, VNTC = 2 V

VRX = GND

1µA

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