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
bol
T
CON
TR
Parameter
V
OUT
step rise time from 0.6V to 3.4V (to
reach 3.26V)
V
OUT
step fall time from 3.4V to 0.6V (to reach
0.74V)
Maximum Duty cycle
Maximum output current capability
Condition
V
IN
= 3.6V, VCON = 0.24V to 1.36V
VCON T
R
= 1 µs, R
LOAD
= 10Ω
V
IN
= 3.6V, VCON = 1.36V to 0.24V
VCON T
F
= 1 µs, R
LOAD
= 10Ω
Min
Typ
Max
25
Unit
s
µs
25
100
%
mA
5
−3
−50
10
+3
+50
50
75
90
95
%
pF
%
mV
µs
D
I
OUT
2.7V
≤
V
IN
≤
5.5V
0.24V
≤
VCON
≤
1.36V
VCON = 1V
Test frequency = 100 KHz
Monotronic in nature
(1)
750
C
CON
VCON input capacitance
Line
arity
T
ON
Linearity in control range 0.24V to 1.36V
Turn-on time (time for output to reach 95%
final value after Enable low-to-high transition)
EN = Low-to-High
V
IN
= 4.2V, V
OUT
= 3.4V
I
OUT
= < 1mA, C
OUT
= 4.7 µF
V
IN
= 3.6V, V
OUT
= 0.8V
I
OUT
= 10 mA, ECO mode
η
Efficiency
V
IN
= 3.6V, V
OUT
= 1.8V
I
OUT
= 200 mA, PWM mode
V
IN
= 3.9V, V
OUT
= 3.3V
I
OUT
= 500 mA, PWM mode
LINE
TR
Line transient response
V
IN
= 3.6V to 4.2V,
T
R
= T
F
= 10 µs,
I
OUT
= 100 mA, V
OUT
= 0.8V
V
IN
= 3.1V/3.6V/4.5V,
V
OUT
= 0.8V,
I
OUT
= 50 mA to 150 mA
T
R
= T
F
= 0.1 µs
50
mVp
k
50
LOA
D
TR
Load transient response
(1)
Linearity limits are ±3% or ±50 mV whichever is larger.
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