LM3525 datasheet(4/10 Pages) NSC

4 / 10 page

AC Electrical Characteristics

Limits in standard typeface are for T

J = 25˚C, and limits in boldface type apply over the full operating temperature range. Un-

less otherwise specified: V

IN = 5.0V.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

OUT Rise Time

L =10Ω

200

µs

OUT Fall Time

L =10Ω

µs

Turn on Delay, EN to OUT

L =10Ω

200

µs

OFF

Turn off Delay, EN to OUT

L =10Ω

µs

Over Current Flag Delay

L =0

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device

beyond its rated operating conditions. Products are not tested under negative Absolute Maximum conditions.

Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX (maximum junction temperature), θJA (junction to am-

bient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is PDMAX = (TJMAX −TA)/θJA or the number

given in the Absolute Maximum Ratings, which ever is lower. The thermal resistance

θJA of the LM3525 in the SO-8 package is 150˚C/W.

Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin.

Note 4: Thermal shutdown will protect the device from permanent damage.

Note 5: For the LM3525-L, OFF is EN

≥ 2.4V and ON is EN ≤ 0.8V. For the LM3525-H, OFF is EN ≤ 0.8V and ON is EN ≥ 2.4V

Pin Description

Pin Number

Pin Name

Pin Function

1EN

(LM3525-L)

(LM3525-H)

Enable (Input): Logic-compatible enable input.

FLG

Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent, UVLO and thermal

shutdown.

GND

Ground

4, 5

Not internally connected.

Supply Input: This pin is the input to the power switch and the supply voltage for the IC.

6, 8

OUT

Switch Output: This pin is the output of the high side switch. Pins6&8 must be tied together.

Typical Application Circuit

DS101055-3

LM3525 Datasheet(PDF) 4 Page - National Semiconductor (TI)

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