SC1464 datasheet(3/10 Pages) SEMTECH

Part #	SC1464

Description	60mA PROGRAMMABLE FIXED FREQUENCY CHARGE PUMP DOUBLER

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Manufacturer	SEMTECH [Semtech Corporation]

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652 MITCHELL ROAD NEWBURY PARK CA 91320

60mA PROGRAMMABLE FIXED

FREQUENCY CHARGE PUMP DOUBLER

SC1464

PRELIMINARY - August 11, 2000

3

Parameter

Symbol

Test Conditions

MIN

TYP

MAX

Units

Time to Regulation at

Turn-on

(2)(3)

t

ON

I

O = 0 to 60 mA

freq = 260kHz

420

1000

µs

Input High Threshold

V

ih

All input pins

1.3

V

Input Low Threshold

V

il

All input pins

0.4

V

Inrush Current

(3)

I

INRUSH

Upon application of V

IN, Maximum

average current over 10 periods

750

mA

Over Temperature

protection

(3)

O.T.

170

°C

Over Temperature

Hysteresis

(3)

O.T.H

10

°C

ELECTRICAL CHARACTERISTICS

Unless specified, T

A = -40°C to 85°C, EN = VIN, CBucket = 2.2µF(ESR = 0.1τ), CIN , COUT = 3.3µF(ESR = 1τ), VIN = 3V±5%, VOUT = 5.2V to 6.2V.

NOTES:

(1) All electrical characteristics are for the application circuit on page 2.

(2) Soft start functionality is performed along with short circuit protection. If V

OUT is less than VIN - 200mV, then all

switches are turned off and V

OUT is charged with a 70mA current source from VIN. W hen VOUT reaches VIN - 200mV,

then a current limit version of the switches are turned on until V

OUT reaches VIN + a PMOS threshold, at which point

all switches are enabled.

(3) Guaranteed by design.

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