LTC3589 datasheet(6/36 Pages) LINER

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LTC3375

3375fa

For more information www.linear.com/3375

elecTrical characTerisTics The

denotes the specifications which apply over the specified operating

junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VCC = VIN1-8 = 3.3V, unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Interface Logic Pins (EN1, EN2, EN3, EN4, EN5, EN6, EN7, EN8)

VHI_ALLOFF

Enable Rising Threshold

All Regulators Disabled

400

730

1200

VEN_HYS

Enable Hysteresis

VHI

Enable Rising Threshold

At Least One Regulator Enabled

380

400

420

IEN

Enable Pin Leakage Current

EN = VCC = VIN = 5.5V

–1

µA

Pushbutton Parameters, CT = 0.01µF

tPB_LO

PB Low Time to IRQ Low

ON High

tPB_ON

PB Low Time to ON High

140

200

260

tPB_OFF

PB Low to ON Forced Low

sec

tHR

Time for Which All Enabled Regulators

Are Disabled After KILL is Asserted High

ON High

0.7

1.3

sec

tIRQ_PW

IRQ Minimum Pulse Width

ON High

tKILLH

Time in Which KILL Must Be Asserted

High

After ON Rising Edge

sec

tKILLL

KILL Low Time to ON Low

ON High

tRST

RST Assertion Delay

160

230

300

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC3375 is tested under pulsed load conditions such that

TJ ≈ TA. The LTC3375E is guaranteed to meet specifications from

0°C to 85°C junction temperature. Specifications over the –40°C to

125°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LTC3375I is guaranteed over the –40°C to 125°C operating junction

temperature range. The LTC3375H is guaranteed over the –40°C to 150°C

operating junction temperature range. High junction temperatures degrade

operating lifetimes; operating lifetime is derated for junction temperatures

greater than 125°C. Note that the maximum ambient temperature

consistent with these specifications is determined by specific operating

conditions in conjunction with board layout, the rated package thermal

impedance and other environmental factors. The junction temperature

(TJ in °C) is calculated from the ambient temperature (TA in °C) and

power dissipation (PD in Watts) according to the formula:

TJ = TA + (PD • θJA)

where

θJA (in °C/W) is the package thermal impedance.

Note 3: The LTC3375 includes overtemperature protection which protects

the device during momentary overload conditions. Junction temperatures

will exceed 150°C when overtemperature protection is active. Continuous

operation above the specified maximum operating junction temperature

may impair device reliability.

Note 4: Static current, switches not switching. Actual current may be

higher due to gate charge losses at the switching frequency.

Note 5: The current limit features of this part are intended to protect the

IC from short term or intermittent fault conditions. Continuous operation

above the maximum specified pin current rating may result in device

degradation over time.

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