Datasheet

LM3241
SNOSB38B –JANUARY 2009–REVISED APRIL 2013 www.ti.com
ELECTRICAL CHARACTERISTICS
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Feedback voltage at minimum
V
FB,MIN
PWM mode, VCON = 0.24V 0.58 0.6 0.62
setting
V
Feedback voltage at maximum PWM mode, VCON = 1.36V, V
IN
=
V
FB,MAX
3.332 3.4 3.468
setting 3.9V
EN = SW = VCON = 0V
I
SHDN
Shutdown supply current 0.1 2 µA
(4)
PWM mode, No switching
I
Q
_PWM PWM mode Quiescent current VCON = 0V, FB = 1V 620 750
(5)
µA
ECO mode, No switching
I
Q
_ECO ECO mode Quiescent current VCON = 0.8V, FB = 2.05V 45 60
(5)
V
IN
= V
GS
= 3.6V
R
DSON (P)
Pin-pin resistance for PFET 160 250
I
SW
= 200 mA
mΩ
V
IN
= V
GS
= 3.6V
R
DSON (N)
Pin-pin resistance for NFET 110 200
I
SW
= −200 mA
I
LIM
PFET switch peak current limit
(6)
1300 1450 1600 mA
F
OSC
Internal oscillator frequency 5.7 6 6.3 MHz
V
IH
EN Logic high input threshold 1.2
V
V
IL
EN Logic low input threshold 0.4
Gain VCON to V
OUT
gain 0.24V ≤ VCON ≤ 1.36V 2.5 V/V
I
CON
VCON pin leakage current VCON = 1.0V ±1 µA
(1) All voltages are with respect to the potential at the GND pins.
(2) Min and Max limits are specified by design, test, or statistical analysis.
(3) The parameters in the electrical characteristics table are tested under open loop conditions at V
IN
= 3.6V unless otherwise
specified. For performance over the input voltage range and closed-loop results, refer to the datasheet curves.
(4) Shutdown current includes leakage current of PFET.
(5) I
Q
specified here is when the part is not switching under test mode conditions. For operating quiescent current at no load, refer to
datasheet curves.
(6) Current limit is built-in, fixed, and not adjustable.
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