a. Device mounted with all leads soldered or welded to PC board.
b. Derate 5.5 mW/_C above T
A
= 70_C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
b. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing. Typical values for dropout voltage at V
OUT
w
2 V are measured at
V
OUT
= 3.3 V, while typical values for dropout voltage at V
OUT
< 2 V are measured at V
OUT
= 1.8 V.
d. Dropout voltage is defined as the input to output differential voltage at which the output voltage drops 2% below the output voltage measured with a 1-V
differential, provided that V
IN
does not not drop below 2.0 V.
e. Ground current is specified for normal operation as well as “drop-out” operation.
f.
The device’s shutdown pin includes a typical 2-MW internal pull-down resistor connected to ground.
g. V
OUT(nom)
is V
OUT
when measured with a 1-V differential to V
IN.
TIMING WAVEFORMS
V
IN
V
SD
t
r
v
1
ms
0V
t
ON
V
NOM
0.95 V
NOM
V
OUT
FIGURE 1.
Timing Diagram for Power-Up
Document Number: 71447
S-40592—Rev. C, 29-Mar-04
www.vishay.com
3
Si91841/3
Vishay Siliconix
PIN CONFIGURATION
PIN DESCRIPTION
V
OUT
Thin SOT-23, 5-Lead
V
IN
1
5
Pin No.
1
2
Name
V
IN
GND
SD
BP
V
OUT
Function
Input supply pin. Bypass this pin with a 1-mF ceramic or tantalum capacitor to ground
Ground pin. For better thermal capability, directly connected to large ground plane
By applying less than 0.4 V to this pin, the device will be turned off. Connect this pin to
V
IN
if unused
Noise bypass pin. For low noise applications, a 0.01
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