FAN4855MTC datasheet(3/12 Pages) FAIRCHILD

Il numero della parte	FAN4855MTC

Spiegazioni elettronici	500mA High Efficiency Boost Regulator with Adjustable Output, Shutdown and Low Battery Detect

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Produttore elettronici	FAIRCHILD [Fairchild Semiconductor]

Homepage	http://www.fairchildsemi.com

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FAN4855 Rev. 1.0.1

Recommended Operating Conditions

Electrical Characteristics

Unless otherwise speciﬁed, VIN = 1.6V to 3V, ILOAD = 1mA, TA = -40°C to +85°C. Test Circuit Fig.1. Typical values are at

TA = +25°C

Notes:

1. R4, R5, R6 tolerance

≤ 0.1%.

2. Current through R1, R2 is not taken into account.

Parameter

Min.

Max.

Units

Ambient Temperature Range

-40

+85

°C

VIN Operating Range

1.6

0.9 VOUT

V

VOUT Operating Range

3.0

5.0

V

Parameter

Conditions

Min.

Typ.

Max.

Units

Start Up Voltage

ILOAD < 1mA

1.35

1.6

V

Operating Voltage

After start ILOAD =10mA, VOUT = 3.3V or 5V

1.0

V

Output Voltage

VOUT(nom.) = 3.3V (Note 1)

VOUT(nom.) = 5V

3.15

4.775

3.3

5

3.45

5.225

V

Output Voltage Adjust Range

3

5

V

Steady State Output Current

VOUT = 3.3V, VIN = 2.5V

300

500

mA

VOUT = 5V, VIN = 2.5V

200

330

mA

Pulse Width

VIN = 3V

0.8

1.4

2

µs

VIN = 2.4V

1.2

1.7

2.5

µs

VIN = 1.8V

1.6

2.2

3.3

µs

VIN = 1.6V

1.7

2.5

4.0

µs

Minimum Off-Time

1

µs

Line Regulation

IOUT = 2mA, VOUT = 3.3V

0.5

2

%

VOUT = 5V

0.5

2

%

Load Regulation

0 to 250mA, VIN = 2.4V, VOUT = 3.3V

0.5

%

0 to 150mA, VIN = 2.4V, VOUT = 5V

1

%

Feedback Voltage (VFB)

1.243

V

LBI Threshold Voltage

0.390

V

LBI Hysteresys

25

mV

Internal NFET, PFET ON Resist.

ILOAD = 100mA

0.35

Ω

Power Efﬁciency

ILOAD = 200mA, VIN = 3V, VOUT = 3.3V

95

%

Input Current in Shut Down Mode

SHDN = 0V, VIN = 3V (Note 2)

8

50

µA

Quiescent Current

SHDN = 3V, VIN = 3V, VOUT = 3.3V

(Note 2)

80

160

µA

LBO Output Voltage Low

VLBI = 0, ISINK = 1mA

0.2

V

SHDN Input Threshold Voltage

VIN = 3V, VOUT = 3.3V/5V

1.5

V

SHDN Input Threshold Voltage

VIN = 1.6V, VOUT = 3.3V/5V

0.8

V

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