PTH04T260WAS datasheet(7/36 Pages) TI

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PTH04T260W, PTH04T261W

www.ti.com.................................................................................................................................................. SLTS273E – SEPTEMBER 2006 – REVISED JULY 2009

ELECTRICAL CHARACTERISTICS (continued)

PTH04T261W (Ceramic Capacitors)

TA = 25°C, VI = 5 V, VO = 3.3 V, CI = 300 µF ceramic, CO = 300 µF ceramic, and IO = IO max (unless otherwise stated)

PARAMETER

TEST CONDITIONS

PTH04T261W

UNIT

MIN

TYP

MAX

External input capacitance

300 (5)

µF

w/o TurboTrans

Capacitance Value

Ceramic

300 (6)

5000 (7)

µF

see table

External output capacitance

Capacitance Value

5000

µF

(6)

w/ TurboTrans

Capacitance × ESR product (CO × ESR)

100

1000

µF×m

Ω

Per Telcordia SR-332, 50% stress,

MTBF

Reliability

5.6

106 Hr

TA = 40°C, ground benign

(5)

300 µF of input capacitance is required for proper operation. 300 µF of ceramic or 330 µF of electrolytic input capacitance can be used.

Electrolytic capacitance must be rated for a minimum of 400 mA rms of ripple current. An additional 22-

µF ceramic input capacitor is

recommended to reduce rms ripple current.

(6)

300 µF of ceramic output capacitance is required for basic operation. The minimum output capacitance requirement increases when

TurboTrans™ (TT) technology is utilized. Additionally, low ESR capacitors are required for proper operation. See related Application

Information for more guidance.

(7)

This is the calculated maximum disregarding TurboTrans™ technology.

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