FAN48632 datasheet(5/13 Pages) FAIRCHILD

部品番号	FAN48632

部品情報	2.5 MHz, 2.0 A Pulsed-Load Synchronous TinyBoost

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メーカー	FAIRCHILD [Fairchild Semiconductor]

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FAN48632

• Rev. 1.0.3

5

Electrical Specifications

Recommended operating conditions, unless otherwise noted, circuit per Figure 1, VIN = 2.35 V to VOUT, TA = -40˚C to 85˚C.

Typical values are given VIN = 3.0 V and TA = 25˚C.

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

IQ

VIN Quiescent Current

Bypass Mode VOUT=3.5 V, VIN=4.2 V

140

190

A

Boost Mode VOUT=3.5 V, VIN=2.5 V

150

250

A

Shutdown: EN=0, VIN=3.0 V

1.5

5.0

A

Forced Bypass Mode,

VIN=3.5 V

Low IQ

4

10

A

ILK

VOUT to VIN Reverse Leakage

VOUT=5 V, EN=0

0.2

1.0

A

ILK_OUT

VOUT Leakage Current

VOUT=0, EN=0, VIN=4.2 V

0.1

1.0

A

VUVLO

Under-Voltage Lockout

VIN Rising

2.20

2.35

V

VUVLO_HYS

Under-Voltage Lockout Hysteresis

200

mV

VPG(OL)

PG Low

IPG=5 mA

0.4

V

IPG_LK

PG Leakage Current

VPG=5 V

1

µA

VIH

Logic Level High EN, VSEL, BYP

1.2

V

VIL

Logic Level Low EN, VSEL, BYP

0.4

V

RLOW

Logic Control Pin Pull Downs

(LOW Active)

BYP, VSEL, EN

300

k



IPD

Weak Current Source Pull-Down

BYP, VSEL, EN

100

nA

VREG

Output Voltage Accuracy

Target VOUT relative to GND, DC,

VOUT-VIN > 100 mV

–2

4

%

VTRSP

Load Transient Response

500

– 1250 mA, VIN=3.0 V

±4

%

tON

On-Time

VIN=3.0 V, VOUT=3.5 V, Load >1 A

80

ns

fSW

Switching Frequency

VIN=3.0 V, VOUT=3.5 V, Load=1 A

2.0

2.5

3.0

MHz

IV_LIM

Boost Valley Current Limit

VIN=2.6 V

3.3

3.7

4.1

A

IV_LIM_SS

Boost Valley Current Limit During

SS

VIN=2.6 V

1.8

A

ISS_PK

Soft-Start Input Current Limit

LIN1

Fast

900

mA

LIN2

Fast

1800

mA

tSS

Soft-Start EN HIGH to Regulation

Fast, 50

 Load

600

s

VOVP

Output Over-Voltage Protection

Threshold

6.0

6.3

V

VOVP_HYS

Output Over-Voltage Protection

Hysteresis

300

mV

RDS(ON)N

N-Channel Boost Switch RDS(ON)

VIN=3.5 V

85

120

m

Ω

RDS(ON)P

P-Channel Sync Rectifier RDS(ON)

VIN=3.5 V

65

85

m

Ω

RDS(ONBYP

P-Channel Bypass Switch RDS(ON)

VIN=3.5 V

65

85

m

Ω

T120A

T120 Activation Threshold

120

°C

T120R

T120 Release Threshold

100

°C

T150T

T150 Threshold

150

°C

T150H

T150 Hysteresis

20

°C

tRST

FAULT Restart Timer

20

ms

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