LTC3370

5

3370fb

For more information www.linear.com/LTC3370

l

denotes the specifications which apply over the full operating

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Buck Regulators Combined

PMOS Current Limit

2 Buck Power Stages Combined (Note 5)

4.6

A

PMOS Current Limit

3 Buck Power Stages Combined (Note 5)

6.9

A

PMOS Current Limit

4 Buck Power Stages Combined (Note 5)

9.2

A

Interface Logic Pins (PGOODALL, PLL/MODE, CT, C1, C2, C3)

Output High Leakage Current

PGOODALL 5.5V at Pin

1

µA

Output Low Voltage

PGOODALL 3mA into Pin

0.1

0.4

V

C1, C2, C3 Input Low Threshold

l

0.4

V

PLL/MODE, CT, C1, C2, C3 Input High

Threshold

l

V

PLL/MODE Input Low Threshold

l

V

Interface Logic Pins (EN1, EN2, EN3, EN4)

Enable Rising Threshold

All Regulators Disabled

l

730

1200

mV

Enable Rising Threshold

At Least One Regulator Enabled

l

400

420

mV

Enable Falling Threshold

340

375

mV

Enable Pin Leakage Current

EN = 3.3V

1

µA

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 LTC3370 is tested under pulsed load conditions such that

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

LTC3370I is guaranteed over the –40°C to 125°C operating junction

temperature range. The LTC3370H 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

Note 3: The LTC3370 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.