lt3014bes5-trpbf Linear Technology Corporation, lt3014bes5-trpbf Datasheet - Page 6

• Manufacturer Part Number: lt3014bes5-trpbf
• Description: 20ma, 3v To 80v Low Dropout Micropower Linear Regulator
• Manufacturer: Linear Technology Corporation

PI FU CTIO S
IN (Pin 1/Pin 8): Input. Power is supplied to the device
through the IN pin. A bypass capacitor is required on this
pin if the device is more than six inches away from the main
input filter capacitor. In general, the output impedance of
a battery rises with frequency, so it is advisable to include
a bypass capacitor in battery-powered circuits. A bypass
capacitor in the range of 0.1µF to 10µF is sufficient. The
LT3014 is designed to withstand reverse voltages on the
IN pin with respect to ground and the OUT pin. In the case
of a reversed input, which can happen if a battery is
plugged in backwards, the LT3014 will act as if there is a
diode in series with its input. There will be no reverse
current flow into the LT3014 and no reverse voltage will
LT3014
6
TYPICAL PERFOR A CE CHARACTERISTICS
3.5
3.0
2.5
2.0
1.5
1.0
0.5
U
0
–50
Minimum Input Voltage
I
LOAD
–25
U
= 20mA
200µV/DIV
0
TEMPERATURE (°C)
V
25
OUT
U
10Hz to 100kHz Output Noise
C
I
V
L
50
OUT
OUT
= 20mA
= 0.47µF
= 1.22V
75
(SOT-23 Package/DD Package)
W
100
3014 G19
1ms/DIV
U
125
–10
–15
–20
–25
–30
–35
–40
–5
0
– 50
Load Regulation
∆I
V
3014 G22
OUT
L
– 25
= 100µA TO 20mA
= 1.22V
0
TEMPERATURE (°C)
25
appear at the load. The device will protect both itself and
the load.
GND (Pin 2/Pins 4, 9): Ground.
SHDN (Pin 3/Pin 5): Shutdown. The SHDN pin is used to
put the LT3014 into a low power shutdown state. The
output will be off when the SHDN pin is pulled low. The
SHDN pin can be driven either by 5V logic or open-
collector logic with a pull-up resistor. The pull-up resistor
is only required to supply the pull-up current of the open-
collector gate, normally several microamperes. If unused,
the SHDN pin must be tied to IN or to a logic high.
50
–0.02
–0.04
75
0.04
0.02
0
6
4
2
0
Transient Response
0
100
3014 G20
125
200
C
IN
400
= C
TIME (µs)
0.01
0.1
OUT
10
∆I
1
10
LOAD
Output Noise Spectral Density
= 0.47µF CERAMIC
600
C
I
V
L
OUT
OUT
= 20mA
= 1mA TO 5mA
= 0.47µF
= 1.22V
V
800
100
OUT
V
IN
= 7V
= 5V
FREQUENCY (Hz)
3014 G23
1000
1k
10k
3014 G21
3014fb
100k