FAN4868 datasheet(4/12 Pages) ONSEMI

Part #	FAN4868

Description	3 MHz, Synchronous TinyBoost Regulator

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FAN4868

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Table 6. ELECTRICAL SPECIFICATIONS

Minimum and maximum values are at VIN = VEN = 2.3 V to 4.5 V (2.5 to 3.2 VIN for 3.3 VOUT option), TA = −40°C to +85°C; circuit of

Typical Application, unless otherwise noted. Typical values are at TA = 25°C, and VIN = VEN = 2.7 V for VOUT = 3.3 V.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

IIN

VIN Input Current

3.3 VOUT

Quiescent: VIN = 2.7 V, IOUT = 0, EN = VIN

50

65

μA

Shutdown: EN = 0, VIN = 2.7 V

0.5

1.5

ILK_OUT

VOUT Leakage Current

VOUT = 0, EN = 0, VIN ≥ 3 V

10

nA

ILK_RVSR

VOUT to VIN Reverse Leakage

VOUT = 3.3 V, VIN = 3.0 V, EN = 0

2.5

μA

VUVLO

Under−Voltage Lockout

VIN Rising

2.2

2.3

V

VUVLO_HYS

Under−Voltage Lockout

Hysteresis

190

mV

VENH

Enable HIGH Voltage

1.05

V

VENL

Enable LOW Voltage

0.4

V

ILK_EN

Enable Input Leakage Current

0.01

1.00

μA

VOUT

Output Voltage

Accuracy

(Note 2)

3.3 VOUT

VIN from 2.5 V to 3.2 V, IOUT ≤ 200 mA

3.17

3.33

3.41

V

vref

Reference Accuracy

Referred to VOUT = 3.3 V

3.280

3.330

3.380

V

tOFF

Off Time

VIN = 2.7 V, VOUT = 3.3 V, IOUT = 200 mA

240

290

350

ns

IOUT

Maximum Output

Current

(Note 2)

3.3 VOUT

VIN = 2.5 V

250

mA

VIN = 2.7 V

300

ISW

SW Peak Current

Limit

3.3 VOUT

VIN = 2.7 V, VOUT > VIN

650

800

950

mA

ISS

Soft−Start Input

Peak Current

Limit

(Note 3)

3.3 VOUT

VIN = 2.7 V, VOUT < VIN

700

mA

tSS

Soft−Start Time

(Note 4)

3.3 VOUT

VIN = 2.7 V, IOUT = 200 mA

250

750

μs

RDS(ON)

N−Channel Boost Switch

VIN = 3.6 V

300

mΩ

P−Channel Sync Rectifier

VIN = 3.6 V

400

TTSD

Thermal Shutdown

ILOAD = 10 mA

150

°C

TTSD_HYS

Thermal Shutdown Hysteresis

30

°C

2. ILOAD from 0 to IOUT; also includes load transient response. VOUT measured from mid−point of output voltage ripple.

Effective capacitance of COUT > 1.5 μF.

3. Guaranteed by design and characterization; not tested in production.

4. Elapsed time from rising EN until regulated VOUT.

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