SC1462 datasheet(3/9 Pages) SEMTECH

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SC1462

652 MITCHELL ROAD NEWBURY PARK CA 91320

HIGH OUTPUT CURRENT

CHARGE PUMP DOUBLER

October 20, 2000

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

ELECTRICAL CHARACTERISTICS

Unless specified: T

A = -40°C to 85°C, SHDN = GND, 1.65V ≤ VIN ≤=5.5V, CIN = COUT = CBUCKET = 3.3µF (ESR = 0.3Ω).

Parameter

Symbol

Conditions

MIN

TYP

MAX

Units

Maximum Output Voltage

(3)

OUT

O = 0mA

2*V

Input High Threshold

SHDN pin, 2.5

≤ V

IN ≤ 5.5

1.6

Input Low Threshold

SHDN pin, 2.5

≤ V

IN ≤ 5.5

0.4

Time to Regulation at

Turn-on

(2)

O = 0 to 60 mA, VIN = 3.6V

freq = 160kHz

500

µs

Over Temperature

protection

(3)

O.T.

140

°C

Over Temperature

Hysteresis

(3)

O.T.H

°C

NOTES:

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

(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 200mA current source from VIN. W hen VOUT reaches VIN -

200mV all switches are enabled.

(3) Guaranteed by design.

(4) This device is ESD sensitive. Use of standard ESD handling precautions is required.

(5) The internal switch resistance, the capacitor ESR and the Oscillator’s switching frequency all contribute to

out . See the CAPACITOR SELECTION section for information on applying the Rout specification.

(6) The parameter R

sw is equal to the total resistance of all 4 internal switches. See the CAPACITOR SELECTION

section for information on applying the R

sw specification. This parameter was calculated from actual output re-

sistance and the equation on page 7 for R

out .

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