LT1521CS833PBF

Manufacturer Part NumberLT1521CS833PBF
DescriptionSOP8
ManufacturerLinear Technology Corporation
LT1521CS833PBF datasheet
 

Specifications of LT1521CS833PBF

Date_code10+  
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
Page 1/16

Download datasheet (200Kb)Embed
Next
FEATURES
Dropout Voltage: 0.5V
Output Current: 300mA
Quiescent Current: 12 A
No Protection Diodes Needed
Adjustable Output from 3.8V to 20V
Fixed Output Voltages: 3V, 3.3V, 5V
Controlled Quiescent Current in Dropout
Shutdown I
= 6 A
Q
Reverse Battery Protection
No Reverse Current
Thermal Limiting
U
APPLICATIO S
Low Current Regulator
Regulator for Battery-Powered Systems
Post Regulator for Switching Supplies
U
TYPICAL APPLICATIO
5V Battery-Powered Supply with Shutdown
8
IN
OUT
6V
1 F
LT1521-5
5
SHDN
SENSE
GND
3
V
(PIN 5) OUTPUT
SHDN
<0.25
OFF
>2.80
ON
NC
ON
Regulators with Micropower
Quiescent Current and Shutdown
DESCRIPTIO
®
The LT
1521/LT1521-3/LT1521-3.3/LT1521-5 are low
dropout regulators with micropower quiescent current
and shutdown. These devices are capable of supplying
300mA of output current with a dropout voltage of 0.5V.
Designed for use in battery-powered systems, the low
quiescent current, 12 A operating and 6 A in
shutdown, makes them an ideal choice. The quiescent
current is well controlled; it does not rise in dropout as it
does with many other low dropout PNP regulators.
Other features of the LT1521/LT1521-3/LT1521-3.3/
LT1521-5 include the ability to operate with very small
output capacitors. They are stable with only 1.5 F on the
output while most older devices require between 10 F and
100 F for stability. Small ceramic capacitors can be used,
enhancing manufacturability. Also, the input may be con-
nected to voltages lower than the output voltage, including
negative voltages, without reverse current flow from out-
put to input. This makes the LT1521 series ideal for backup
power situations where the output is held high and the
input is low or reversed. Under these conditions only 5 A
will flow from the output pin to ground.
, LTC and LT are registered trademarks of Linear Technology Corporation.
5V
1
300mA
+
1.5 F
2
LT1521 • TA01
LT1521/LT1521-3
LT1521-3.3/LT1521-5
300mA Low Dropout
U
Dropout Voltage
0.6
0.5
0.4
0.3
0.2
0.1
0
0
50
100
150
200
250
300
OUTPUT CURRENT (mA)
LT1521 • TA02
1521335fb
1