LT1764-1.5 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT1764-1.5 Datasheet PDF : 20 Pages
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LT1764 Series
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. (Note 2)
PARAMETER
CONDITIONS
MIN TYP
MAX UNITS
GND Pin Current
VIN = VOUT(NOMINAL) + 1V
(Notes 5, 7)
Output Voltage Noise
ADJ Pin Bias Current
ILOAD = 0mA
ILOAD = 1mA
ILOAD = 100mA
ILOAD = 500mA
ILOAD = 1.5A
ILOAD = 2.7A, 110°C < TJ ≤ 125°C
ILOAD = 3A, – 40°C ≤ TJ ≤ 110°C
COUT = 10µF, ILOAD = 3A, BW = 10Hz to 100kHz
(Notes 3, 8)
●
1
1.5
mA
●
1.1
1.6
mA
●
3.5
5
mA
●
11
18
mA
●
40
75
mA
120
200
mA
120
200
mA
40
µVRMS
3
10
µA
Shutdown Threshold
VOUT = Off to On
VOUT = On to Off
SHDN Pin Current
(Note 9)
VSHDN = 0V
VSHDN = 20V
Quiescent Current in Shutdown VIN = 6V, VSHDN = 0V
Ripple Rejection
VIN – VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P,
fRIPPLE = 120Hz, ILOAD = 1.5A
Current Limit
VIN = 7V, VOUT = 0V
LT1764-1.8, LT1764-2.5, LT1764-3.3
VIN = VOUT(NOMINAL) + 1V, ∆VOUT = – 0.1V, – 40°C ≤ TJ ≤ 110°C
VIN = VOUT(NOMINAL) + 1V, ∆VOUT = – 0.1V, 110°C < TJ ≤ 125°C
LT1764, LT1764-1.5
VIN = 2.7V, ∆VOUT = – 0.1V, – 40°C ≤ TJ ≤ 110°C
VIN = 2.7V, ∆VOUT = – 0.1V, 110°C < TJ ≤ 125°C
Input Reverse Leakage Current VIN = – 20V, VOUT = 0V
Reverse Output Current (Note 10) LT1764-1.5 VOUT = 1.5V, VIN < 1.5V
LT1764-1.8 VOUT = 1.8V, VIN < 1.8V
LT1764-2.5 VOUT = 2.5V, VIN < 2.5V
LT1764-3.3 VOUT = 3.3V, VIN < 3.3V
LT1764 (Note 3) VOUT = 1.21V, VIN < 1.21V
●
0.9
2
V
● 0.25 0.75
V
0.01
1
µA
7
30
µA
0.01
1
µA
55
63
dB
4
A
3.1
A
2.8
A
3.1
A
2.8
A
●
1
mA
600
1200
µA
600
1200
µA
600
1200
µA
600
1200
µA
300
600
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 LT1764 regulators are tested and specified under pulse load
conditions such that TJ ≈ TA. The LT1764 is 100% tested at TA = 25°C.
Performance at – 40°C and 125°C is assured by design, characterization
and correlation with statistical process controls.
Note 3: The LT1764 (adjustable version) is tested and specified for these
conditions with the ADJ pin connected to the OUT pin.
Note 4. 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.
Note 5: To satisfy requirements for minimum input voltage, the LT1764
(adjustable version) is tested and specified for these conditions with an
external resistor divider (two 4.12k resistors) for an output voltage of 2.42V.
The external resistor divider will add a 300µA DC load on the output.
Note 6: 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: VIN – VDROPOUT.
Note 7: GND pin current is tested with VIN = VOUT(NOMINAL) + 1V or
VIN = 2.7V (whichever is greater) and a current source load. The GND pin
current will decrease at higher input voltages.
Note 8: ADJ pin bias current flows into the ADJ pin.
Note 9: SHDN pin current flows into the SHDN pin.
Note 10: 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.
Note 11. For the LT1764, LT1764-1.5 and LT1764-1.8 dropout voltage will
be limited by the minimum input voltage specification under some output
voltage/load conditions.
Note 12. All combinations of absolute maximum input voltage and
absolute maximum output voltage cannot be achieved. The absolute
maximum differential from input to output is ±20V. For example, with
VIN = 20V, VOUT cannot be pulled below ground.
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