Datasheet

LM3241
www.ti.com SNOSB38B –JANUARY 2009–REVISED APRIL 2013
SYSTEM CHARACTERISTICS
The following spec table entries are guaranteed by design providing the component values in the Typical Application Circuit
are used. These parameters are not verified by production testing. Min and Max values apply over the full operating
ambient temperature range (-30°C ≤ T
A
≤ 85°C) and over the V
IN
range = 2.7V to 5.5V unless otherwise specified. L = 0.47
µH, DCR = 50 mΩ, C
IN
= 10 µF, 6.3V, 0603 (1608), C
OUT
= 4.7 µF, 6.3V, 0603 (1608).
Sym Parameter Condition Min Typ Max Unit
bol s
V
OUT
step rise time from 0.6V to 3.4V (to V
IN
= 3.6V, VCON = 0.24V to 1.36V
25
reach 3.26V) VCON T
R
= 1 µs, R
LOAD
= 10Ω
T
CON
µs
TR
V
OUT
step fall time from 3.4V to 0.6V (to reach V
IN
= 3.6V, VCON = 1.36V to 0.24V
25
0.74V) VCON T
F
= 1 µs, R
LOAD
= 10Ω
D Maximum Duty cycle 100 %
I
OUT
Maximum output current capability 2.7V ≤ V
IN
≤ 5.5V 750 mA
0.24V ≤ VCON ≤ 1.36V
C
CON
VCON input capacitance VCON = 1V 5 10 pF
Test frequency = 100 KHz
Line Linearity in control range 0.24V to 1.36V Monotronic in nature
(1)
−3 +3 %
arity
−50 +50 mV
Turn-on time (time for output to reach 95% EN = Low-to-High
T
ON
final value after Enable low-to-high transition) V
IN
= 4.2V, V
OUT
= 3.4V 50 µs
I
OUT
= < 1mA, C
OUT
= 4.7 µF
V
IN
= 3.6V, V
OUT
= 0.8V
75
I
OUT
= 10 mA, ECO mode
V
IN
= 3.6V, V
OUT
= 1.8V 90
η Efficiency %
I
OUT
= 200 mA, PWM mode
V
IN
= 3.9V, V
OUT
= 3.3V 95
I
OUT
= 500 mA, PWM mode
V
IN
= 3.6V to 4.2V,
LINE
Line transient response T
R
= T
F
= 10 µs, 50
TR
I
OUT
= 100 mA, V
OUT
= 0.8V
mVp
V
IN
= 3.1V/3.6V/4.5V,
k
LOA V
OUT
= 0.8V,
Load transient response 50
D
TR
I
OUT
= 50 mA to 150 mA
T
R
= T
F
= 0.1 µs
(1) Linearity limits are ±3% or ±50 mV whichever is larger.
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