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