LT121IZ-3.3(RevE) Просмотр технического описания (PDF) - Linear Technology
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LT121IZ-3.3 Datasheet PDF : 16 Pages
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LT1121/LT1121-3.3/LT1121-5
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the operating temperature
range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Regulated Output Voltage
(Note 4)
LT1121-3.3
VIN = 3.8V, IOUT = 1mA, TJ = 25°C
3.250 3.300 3.350
V
4.3V < VIN < 20V, 1mA < IOUT < 150mA ● 3.200 3.300 3.400
V
LT1121-5
VIN = 5.5V, IOUT = 1mA, TJ = 25°C
4.925 5.000 5.075
V
6V < VIN < 20V, 1mA < IOUT < 150mA ● 4.850 5.000 5.150
V
LT1121 (Note 5) VIN = 4.3V, IOUT = 1mA, TJ = 25°C
3.695 3.750 3.805
V
4.8V < VIN < 20V, 1mA < IOUT < 150mA ● 3.640 3.750 3.860
V
Line Regulation
LT1121-3.3
ΔVIN = 4.8V to 20V, IOUT = 1mA
●
1.5
10
mV
LT1121-5
ΔVIN = 5.5V to 20V, IOUT = 1mA
●
1.5
10
mV
LT1121 (Note 5) ΔVIN = 4.3V to 20V, IOUT = 1mA
●
1.5
10
mV
Load Regulation
LT1121-3.3
ΔILOAD = 1mA to 150mA, TJ = 25°C
ΔILOAD = 1mA to 150mA
●
– 12 – 25
mV
– 20 – 40
mV
LT1121-5
ΔILOAD = 1mA to 150mA, TJ = 25°C
ΔILOAD = 1mA to 150mA
●
– 17 – 35
mV
– 28 – 50
mV
LT1121 (Note 5) ΔILOAD = 1mA to 150mA, TJ = 25°C
ΔILOAD = 1mA to 150mA
●
– 12 – 25
mV
– 18 – 40
mV
Dropout Voltage
(Note 6)
ILOAD = 1mA, TJ = 25°C
ILOAD = 1mA
0.13 0.16
V
●
0.25
V
ILOAD = 50mA, TJ = 25°C
ILOAD = 50mA
0.30 0.35
V
●
0.50
V
ILOAD = 100mA, TJ = 25°C
ILOAD = 100mA
0.37 0.45
V
●
0.60
V
ILOAD = 150mA, TJ = 25°C
ILOAD = 150mA
0.42 0.55
V
●
0.70
V
Ground Pin Current
ILOAD = 0mA
●
30
50
μA
(Note 7)
ILOAD = 1mA
●
90
120
μA
ILOAD = 10mA
●
350 500
μA
ILOAD = 50mA
●
1.5
2.5
mA
ILOAD = 100mA
●
4.0
7.0
mA
ILOAD = 150mA
●
7.0
14.0
mA
Adjust Pin Bias Current (Notes 5, 8)
TJ = 25°C
150 300
nA
Shutdown Threshold
VOUT = Off to On
VOUT = On to Off
●
1.2
2.8
V
● 0.25 0.75
V
Shutdown Pin Current (Note 9)
VSHDN = 0V
●
6
10
μA
Quiescent Current in Shutdown (Note 10) VIN = 6V, VSHDN = 0V
●
16
22
μA
Ripple Rejection
VIN – VOUT = 1V (Avg), VRIPPLE = 0.5VP-P,
fRIPPLE = 120Hz, ILOAD = 0.1A
50
58
dB
Current Limit
VIN – VOUT = 7V, TJ = 25°C
200 500
mA
Input Reverse Leakage Current
VIN = –20V, VOUT = 0V
●
1.0
mA
Reverse Output Current (Note 11)
LT1121-3.3
LT1121-5
LT1121 (Note 5)
VOUT = 3.3V, VIN = 0V
VOUT = 5V, VIN = 0V
VOUT = 3.8V, VIN = 0V
16
25
μA
16
25
μA
16
25
μA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The shutdown pin input voltage rating is required for a low
impedance source. Internal protection devices connected to the shutdown
pin will turn on and clamp the pin to approximately 7V or – 0.6V. This
range allows the use of 5V logic devices to drive the pin directly. For high
1121fe
3
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