LT1965
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage (Notes 4, 12)
I
I
= 0.5A
= 1.1A
1.65
1.8
V
V
LOAD
LOAD
●
2.3
ADJ Pin Voltage (Notes 4, 5)
V
= 2.1V, I
= 1mA
LOAD
1.182
1.164
1.20
1.20
1.218
1.236
V
V
IN
●
●
2.3V < V < 20V, 1mA < I
< 1.1A
LOAD
IN
Line Regulation (Note 4)
Load Regulation
ΔV = 2.1V to 20V, I
= 1mA
3
8
mV
IN
LOAD
V
V
= 2.3V, ΔI
= 2.3V, ΔI
= 1mA to 1.1A
= 1mA to 1.1A
4.25
8
16
mV
mV
IN
IN
LOAD
LOAD
●
●
●
●
●
Dropout Voltage
I
I
= 1mA
= 1mA
0.05
0.10
0.19
0.29
0.08
0.14
V
V
LOAD
LOAD
V
= V
OUT(NOMINAL)
IN
(Notes 6, 7, 12)
I
I
= 100mA
= 100mA
0.175
0.28
V
V
LOAD
LOAD
I
I
= 500mA
= 500mA
0.25
0.36
V
V
LOAD
LOAD
I
I
= 1.1A
= 1.1A
0.36
0.49
V
V
LOAD
LOAD
●
●
●
●
●
GND Pin Current
I
I
I
I
I
= 0mA
0.5
0.6
2.2
8.2
21
1.1
1.5
5.5
20
mA
mA
mA
mA
mA
LOAD
LOAD
LOAD
LOAD
LOAD
V
= V
+ 1V
OUT(NOMINAL)
= 1mA
IN
(Notes 6, 8)
= 100mA
= 500mA
= 1.1A
40
Output Voltage Noise
C
= 10μF, I
= 1.1A, BW = 10Hz to 100kHz
40
μV
RMS
OUT
LOAD
ADJ Pin Bias Current (Notes 4, 9)
Shutdown Threshold
1.3
4.5
2
μA
●
●
V
OUT
V
OUT
= Off to On
= On to Off
0.85
0.45
V
V
0.2
SHDN Pin Current (Note 10)
V
V
= 0V
= 20V
0.01
5.5
1
10
μA
μA
SHDN
SHDN
Quiescent Current in Shutdown
Ripple Rejection
V
= 6V, V
= 0V
SHDN
0.01
75
1
μA
dB
IN
V
– V
= 1.5V (AVG), V
= 0.5V ,
P-P
57
IN
OUT
= 120Hz, I
RIPPLE
f
= 0.75A
LOAD
RIPPLE
Current Limit
V
IN
V
IN
= 7V, V
= V
= 0
2
A
A
OUT
OUT(NOMINAL)
●
1.2
+ 1V, ΔV
= -0.1V (Note 6)
OUT
Input Reverse Leakage Current
Reverse Output Current (Note 11)
V
= –20V, V
= 0
OUT
1
mA
μA
IN
V
= 1.2V, V < 1.2V (Note 4)
175
400
OUT
IN
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: Absolute maximum input to output differential voltage is not
achievable with all combinations of rated IN pin and OUT pin voltages.
With the IN pin at 22V, the OUT pin may not be pulled below 0V. The total
measured voltage from IN to OUT must not exceed 22V.
Note 5: Maximum junction temperature limits operating conditions. The
regulated output voltage specification does not apply for all possible
combinations of input voltage and output current. Limit the output current
range if operating at the maximum input voltage. Limit the input-to-output
voltage differential if operating at the maximum output current.
Note 6: To satisfy minimum input voltage requirements, the LT1965 is
tested and specified for these conditions with an external resistor divider
(bottom 4.02k, top 4.32k) for an output voltage of 2.5V. The external
resistor divider adds 300μA of output DC load current.
Note 3: The LT1965 is tested and specified under pulse load conditions
such that T ≅ T . The LT1965E is 100% tested at T = 25°C. Performance
Note 7: Dropout voltage is the minimum input-to-output voltage
differential needed to maintain regulation at a specified output current. In
J
A
A
at –40°C and 125°C is assured by design, characterization, and correlation
with statistical process controls. The LT1965I is guaranteed over the full
–40°C to 125°C operating junction temperature range.
dropout, the output voltage equals: (V – V
)
IN
DROPOUT
Note 8: GND pin current is tested with V = V
+ 1V and a
IN
OUT(NOMINAL)
Note 4: The LT1965 is tested and specified for these conditions with the
ADJ connected to the OUT pin.
current source load. GND pin current increases slightly in dropout. See
GND pin current curves in the Typical Performance Characteristics section.
1965f
3
Linear [ Linear ]
