LT1962 Linear Technology, LT1962 Datasheet - Page 3

• Manufacturer Part Number: LT1962
• Description: 300mA/ Low Noise/ Micropower LDO Regulators
• Manufacturer: Linear Technology

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Absolute maximum input to output differential voltage can not be
achieved with all combinations of rated IN pin and OUT pin voltages. With
the IN pin at 20V, the OUT pin may not be pulled below 0V. The total
measured voltage from in to out can not exceed 20V.
Note 3: The LT1962 regulators are tested and specified under pulse load
conditions such that T
Performance at – 40 C and 125 C is assured by design, characterization
and correlation with statistical process controls.
Note 4: The LT1962 (adjustable version) is tested and specified for these
conditions with the ADJ pin connected to the OUT pin.
Note 5: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification will not apply for
all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range must be
limited. When operating at maximum output current, the input voltage
range must be limited.
ELECTRICAL CHARACTERISTICS
The
Dropout Voltage
V
(Notes 6, 7)
GND Pin Current
V
(Notes 6, 8)
Output Voltage Noise
ADJ Pin Bias Current
Shutdown Threshold
SHDN Pin Current
(Note 10)
Quiescent Current in Shutdown
Ripple Rejection
Current Limit
Input Reverse Leakage Current
Reverse Output Current
(Note 11)
PARAMETER
IN
IN
= V
= V
OUT(NOMINAL)
OUT(NOMINAL)
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
J
T
A
. The LT1962 is 100% tested at T
I
I
I
I
I
I
I
I
I
I
I
I
I
C
(Notes 4, 9)
V
V
V
V
V
V
I
V
V
V
LT1962-2.5
LT1962-3
LT1962-3.3
LT1962-5
LT1962 (Note 4)
CONDITIONS
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
OUT
OUT
OUT
SHDN
SHDN
IN
IN
IN
IN
IN
= 6V, V
– V
= 7V, V
= V
= – 20V, V
= 10 F, C
= Off to On
= On to Off
= 10mA
= 10mA
= 50mA
= 50mA
= 100mA
= 100mA
= 300mA
= 300mA
= 0mA
= 1mA
= 50mA
= 100mA
= 300mA
= 300mA
= 0V
= 20V
OUT
OUT(NOMINAL)
SHDN
OUT
= 1.5V (Avg), V
OUT
BYP
= 0V
= 0V
= 0V
= 0.01 F, I
V
V
V
V
V
+ 1V, V
OUT
OUT
OUT
OUT
OUT
= 2.5V, V
= 3V, V
= 3.3V, V
= 5V, V
= 1.22V, V
A
RIPPLE
= 25 C.
OUT
LOAD
IN
IN
= 0.5V
= – 0.1V
IN
IN
< 3V
< 5V
= 300mA, BW = 10Hz to 100kHz
IN
< 2.5V
< 3.3V
< 1.22V
P-P
, f
Note 6: To satisfy requirements for minimum input voltage, the LT1962
(adjustable version) is tested and specified for these conditions with an
external resistor divider (two 250k resistors) for an output voltage of
2.44V. The external resistor divider will add a 5 A DC load on the output.
Note 7: Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a specified output current. In dropout, the
output voltage will be equal to: V
Note 8: GND pin current is tested with V
source load. This means the device is tested while operating in its dropout
region. This is the worst-case GND pin current. The GND pin current will
decrease slightly at higher input voltages.
Note 9: ADJ pin bias current flows into the ADJ pin.
Note 10: SHDN pin current flows into the SHDN pin. This current is
included in the specification for GND pin current.
Note 11: Reverse output current is tested with the IN pin grounded and the
OUT pin forced to the rated output voltage. This current flows into the OUT
pin and out the GND pin.
RIPPLE
= 120Hz,
IN
0.25
– V
MIN
320
55
DROPOUT
IN
= V
LT1962 Series
0.10
0.15
0.18
0.27
0.65
0.01
OUT(NOMINAL)
700
TYP
1.1
0.8
0.1
.
30
65
20
30
65
10
10
10
10
2
8
1
5
A
= 25 C. (Note 2)
MAX
0.15
0.21
0.20
0.28
0.24
0.33
0.33
0.43
120
100
1.6
0.5
75
12
20
20
20
20
10
3
2
5
1
1
and a current
UNITS
V
3
RMS
mA
mA
mA
mA
mA
mA
nA
dB
V
V
V
V
V
V
V
V
A
A
V
V
A
A
A
A
A
A
A
A