LM3241
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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 ≤ TA ≤ 85°C) and over the VIN range = 2.7V to 5.5V unless otherwise specified. L = 0.47
µH, DCR = 50 mΩ, CIN = 10 µF, 6.3V, 0603 (1608), COUT = 4.7 µF, 6.3V, 0603 (1608).
Sym
bol
Parameter
Condition
Min Typ Max Unit
s
VOUT step rise time from 0.6V to 3.4V (to
reach 3.26V)
VIN = 3.6V, VCON = 0.24V to 1.36V
VCON TR = 1 µs, RLOAD = 10Ω
25
µs
25
TCON
TR
VOUT step fall time from 3.4V to 0.6V (to reach VIN = 3.6V, VCON = 1.36V to 0.24V
0.74V)
VCON TF = 1 µs, RLOAD = 10Ω
D
Maximum Duty cycle
100
750
%
IOUT Maximum output current capability
2.7V ≤ VIN ≤ 5.5V
mA
0.24V ≤ VCON ≤ 1.36V
CCON VCON input capacitance
VCON = 1V
5
10
pF
Test frequency = 100 KHz
(1)
Line Linearity in control range 0.24V to 1.36V
arity
Monotronic in nature
−3
+3
%
−50
+50
mV
Turn-on time (time for output to reach 95%
EN = Low-to-High
TON final value after Enable low-to-high transition)
VIN = 4.2V, VOUT = 3.4V
IOUT = < 1mA, COUT = 4.7 µF
50
µs
VIN = 3.6V, VOUT = 0.8V
IOUT = 10 mA, ECO mode
75
90
VIN = 3.6V, VOUT = 1.8V
η
Efficiency
%
IOUT = 200 mA, PWM mode
VIN = 3.9V, VOUT = 3.3V
IOUT = 500 mA, PWM mode
95
50
VIN = 3.6V to 4.2V,
TR = TF = 10 µs,
LINE
TR
Line transient response
Load transient response
IOUT = 100 mA, VOUT = 0.8V
mVp
k
VIN = 3.1V/3.6V/4.5V,
VOUT = 0.8V,
IOUT = 50 mA to 150 mA
TR = TF = 0.1 µs
LOA
D TR
50
(1) Linearity limits are ±3% or ±50 mV whichever is larger.
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