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SC1406

PORTABLE PENTIUM® II & III POWER SUPPLY CONTROLLER

Semtech Corporation 

PORTABLE PENTIUM® II & III

POWER SUPPLY CONTROLLER

SC1406

PRELIMINARY - August 27, 1999

ELECTRICAL CHARACTERISTICS (CONT.)

Unless specified: -0 < TA < 100°C; VCC = 3.3V (See test circuit)

PARAMETER

SYMBOL

CONDITIONS

LINEAR REGULATOR CONTROLLERS

1.5V Linear Regulator Controller

MIN TYP MAX UNIT

Input Bias Current

Output Voltage

CO_1.5 = 56µF, 20mΩ ESR max

or 150µF, 45mΩ ESR max

Capacitance tolerance = 20%

ILR15

VFB_15 = 1.5V

1 mA

VO_1.5, IO = 500mA, pnp BJT with BMIN > 50 @ 1.47 1.50 1.54 V

Imin =

IC = 500mA

0.1mA

Base Drive Output Current

2.5V Linear Regulator Controller

Input Bias Current

IBASE_1.5

ILR25

@ 25°C

VFB_25 = 2.5V

10

120 mA

1 mA

Output Voltage

CO_2.5 = 1µFceramic

ESR range = 1mΩ − 30mΩ

Capacitance tolerance = 20%

VO_2.5,

IO = Imax, pnp BJT with BMIN > 50 @ 2.45 2.50 2.55 V

Imin = 0A

IC = 100mA

Imax=0.1A

Base Drive Output Current

IBASE_2.5

Linear Regulator Soft Start (LRSS)

3.5

20 mA

Linear Reg Soft-Start Current

ILRSS

Enable Threshold

Soft Start Termination Threshold

VSSLR_EN

VTH_LRSS

Charge Current, VLRSS = 0V

Discharge Current, VLRSS = 1.50V,

EN is low or in UVLO

-0.6 -1 -1.4 µA

0.3 1 1.45 mA

150 400 mV

1.53 1.70 1.87 V

Voltage Clamp (VCIN, VCOUT, VCBYP)

Input Voltage

Output Voltage

Imin = 10µA

Progagation Delay**

VH_VCIN

0.95 1.5 1.60 V

VH_VCOUT

VL_VCOUT

RVCOUT = 150Ω

tied to VS = 2.5V

IVCIN = -10µA

VCIN is open 0.8VS

VVCIN = 0.175V

VS

V

0.375

Tpd

VCIN_VCOUT

RVCOUT = 150Ω tied to VS = 2.5V

CVCBYP = 1500pF, VCIN steps from

0.175V to 1.50V and back.

Measured from 50% of VCIN step to

50% of VCOUT transient

10 ns

* Guaranteed by design.

**Guaranteed by characterization.

© 1999 SEMTECH CORP.

Pentium is a registered trademark of Intel Corporation

6

652 MITCHELL ROAD NEWBURY PARK CA 91320

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