a. Device mounted with all leads soldered or welded to multi-layer (1S2P)
JEDEC board, horizontal orientation.
b. Derate 5.5 mW/_C above T
A
= 25_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
= 2.5 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. The device’s shutdown pin includes a typical 6-MW internal pull-down resistor connected to ground.
f.
V
OUT
is defined as the output voltage of the DUT at 1 mA.
Document Number: 71258
S-51147—Rev. G, 20-Jun-05
www.vishay.com
3
Si9183
Vishay Siliconix
TIMING WAVEFORMS
V
IN
t
ON
V
NOM
0.95 V
NOM
V
OUT
FIGURE 3.
Timing Diagram for Power-Up
PIN CONFIGURATION
Thin SOT-23, 5-Pin
V
IN
1
5
V
OUT
GND
2
BP (Version A)
FB (Version B)
SD
3
4
PIN DESCRIPTION
Pin Number
1
2
3
4 (Version A)
4 (Version B)
5
Name
V
IN
GND
SD
BP
FB
V
OUT
Ground pin. Local ground for C
BP
and C
OUT
.
Function
Input supply pin. Bypass this pin with a 1-mF ceramic or tantalum capacitor to ground.
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 0.1-mF or larger ceramic capacitor should be connected from this pin to
ground.
Connect to divided output voltage to adjust the regulation point.
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