LM3489QMM National Semiconductor, LM3489QMM Datasheet - Page 4

• Manufacturer Part Number: LM3489QMM
• Description: LM3489/LM3489Q Hysteretic PFET Buck Controller with Enable Pin; Package: MINI SOIC; No of Pins: 8; Qty per Container: 1000; Container: Reel
• Manufacturer: National Semiconductor

www.national.com
Note 1: Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended
to be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The maximum allowable power dissipation is a function of the maximum junction temperature, T
240°C/W, and the ambient temperature, T
P
Note 3: This pin is internally pulled high and clamped at 8V typical. The absolute maximum and operating maximum rating specifies the input level allowed for
an external voltage source applied to this pin without triggering the internal clamp with margin.
Note 4: The human body model is a 100 pF capacitor discharged through a 1.5kΩ resistor into each pin. The machine model is a 200pF capacitor discharged
directly into each pin. MIL-STD-883 3015.7
Note 5: All limits are guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100%
tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate
Average Outgoing Quality Level (AOQL).
Note 6: Typical numbers are at 25°C and represent the most likely norm.
Note 7: The V
Note 8: V
Note 9: Bias current flows out from the FB pin.
Note 10: A 1000pF capacitor is connected between V
Typical Performance Characteristics
application circuit shown in Application Information section of this datasheet. T
D_MAX
= (T
CL
J_MAX
= I
FB
CL_ADJ
Quiescent Current vs Input Voltage
is the trip voltage at the FB pin when PGATE switches from high to low.
Feedback Voltage vs Temperature
- T
A
)/θ
* R
JA
ADJ
. Exceeding the maximum allowable power dissipation will cause excessive die temperature.
A
. The maximum allowable power dissipation at any ambient temperature is calculated using:
IN
and PGATE.
20186901
20186903
4
All curves taken at VIN = 12V with configuration in typical
Feedback Voltage Hysteresis vs Input Voltage
Shutdown Current vs Input Voltage
J
= 25°C, unless otherwise specified.
J_MAX
, the junction-to-ambient thermal resistance, θ
20186904
20186902
JA
=