SP7648_06 datasheet(2/13 Pages) SIPEX

2 / 13 page

Mar16-06 Rev B

SP7648 Ultra-low Quiescent Current, High Efficiency Boost Regulator

LX, Vo, VBATT, FLASHOUT, FB to GND pin ...................... -0.3 to 6.0V

SHDN, FLASH ..................................................... -0.3V to VBATT+1.0V

Vo, GND, LX Current ....................................................................... 2A

Reverse VBATTCurrent .............................................................. 220mA

Forward VBATTCurrent .............................................................. 500mA

Storage Temperature .................................................. -65 °C to 150°C

PaRaMeTeR

Min

TYP

MaX UniTS

cOnDiTiOnS

Input Voltage Operating Range, VBATT

2.7

4.5

After Startup

Output Voltage Range, VOUT

2.7

5.5

Under Voltage Lock-out/UVLO

0.5

0.61

0.7

Output Voltage, VO

4.6

5.0

5.4

Internal Feedback Divider

Shutdown Current into VO, ISDO

500

VSHDN = ZeroV

Shutdown Current into VBATT, ISDB

250

750

VSHDN = ZeroV, VBATT = 2.7V

Efficiency

VBATT = 2.7V, IOUT = 200mA, RLIM = 2k

Inductor Peak Current Limit, IPK

650

800

000

RLIM = 2k , IPK = 1600/RLIM

600

RLIM = 1k , IPK = 1600/RLIM

Output Current (Note 2)

800

VBATT = 2.7V, RLIM =1k

400

VBATT = 2.7V, RLIM =2k

200

VBATT = 2.7V, RLIM = 4k

Minimum Off-Time Constant KOFF

0.5

1.0

1.5

V*µs

KOFF T OFF (VOUT - VBATT)

Maximum On-Time Constant KON

2.0

3.5

5.0

V*µs

KON T ON (VBATT)

Enable Valid to Output Stable (Note 3)

300

500

ILOAD = mA

NMOS Switch Resistance

0.30

0.6

INMOS = 00mA

PMOS Switch Resistance

0.30

0.6

IPMOS = 00mA

FB Set Voltage, VFB

0.76

0.8

0.84

External feedback Flash = 0

0.266 0.288 0.310

External feedback Flash = 1

FB Input Current

VFB =1.3V

SHDN Input Voltage (Note 1)

VIL

0.5

VBATT = 2.7V

VIH

2.0

VBATT = 2.7V

SHDN Input Current

LX Pin Leakage

FLASH Threshold V IL

0.4

VIH

1.0

eLecTRicaL SPeciFicaTiOnS

VBATT =VSHDN = 3.6V, VFB=ZeroV, ILOAD = 0mA, TAMB= -40°C to +85°C, VOUT = 5.0V, typical values at 27°C unless

otherwise noted. The denotes the specifications which apply over full operating temperature range -40ºC to +85°C, unless

otherwise specified.

Operating Temperature ................................................ -40°C to +85°C

ESD Rating ........................................................................ 1.5kV HBM

These are stress ratings only and functional operation of the device at

these ratings or any other above those indicated in the operation sections

of the specifications below is not implied. Exposure to absolute maximum

rating conditions for extended periods of time may affect reliability.

aBSOLUTe MaXiMUM RaTingS

note 1:SHDN must transition faster than 1V/100mS for proper operation.

note 2:Output Current I =

{VIN }XEfficiencyx{InductorPeakCurrent-InductorRippleCurrent}

VOUT

note 3:Guaranteed by Design.

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