LT1764AEQ-3.3#PBF Linear Technology, LT1764AEQ-3.3#PBF Datasheet - Page 4

• Manufacturer Part Number: LT1764AEQ-3.3#PBF
• Description: IC LDO LOW NOISE 3A 3.3V DDPAK-5
• Manufacturer: Linear Technology

Specifications of LT1764AEQ-3.3#PBF

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 20V
• Voltage - Dropout (typical): 0.34V @ 3A
• Number Of Regulators: 1
• Current - Output: 3A
• Current - Limit (min): 3.1A
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TO-263-5, D²Pak (5 leads + Tab), TO-263BA
• Primary Input Voltage: 20V
• Output Voltage Fixed: 3.3V
• Dropout Voltage Vdo: 340mV
• No. Of Pins: 5
• Output Current: 3A
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TYPICAL PERFOR A CE CHARACTERISTICS
LT1764A Series
ELECTRICAL CHARACTERISTICS
The
PARAMETER
Current Limit
Input Reverse Leakage Current
Reverse Output Current (Note 10) LT1764A-1.5 V
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 LT1764A regulators are tested and specified under pulse load
conditions such that T
T
characterization and correlation with statistical process controls. The
LT1764A (MP grade) is 100% tested and guaranteed over the –55°C to
125°C temperature range.
Note 3: The LT1764A (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 max-
imum input voltage, the output current range must be limited. When operat-
ing at maximum output current, the input voltage range must be limited.
Note 5: To satisfy requirements for minimum input voltage, the LT1764A
(adjustable version) is tested and specified for these conditions with an
external resistor divider (two 4.12k resistors) for an output voltage of
4
A
600
500
100
400
300
200
= 25°C; performance at – 40°C and 125°C is assured by design,
0
●
0
Typical Dropout Voltage
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
0.5
OUTPUT CURRENT (A)
T
1.0
J
= 125°C
J
≈ T
T
J
1.5
= 25°C
A
. The LT1764A (E grade) is 100% tested at
2.0
CONDITIONS
V
E Grade: LT1764A; LT1764A-1.5;
V
MP Grade: LT1764A
V
V
LT1764A-1.8 V
LT1764A-2.5 V
LT1764A-3.3 V
LT1764A (Note 3) V
W
IN
IN
IN
IN
2.5
= 7V, V
= 2.7V, ∆V
= 2.8V, ∆V
= – 20V, V
1764 G01
U
3.0
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
= 0V
= 0V
= – 0.1V
= – 0.1V
= 1.5V, V
= 1.8V, V
= 2.5V, V
= 3.3V, V
OUT
700
600
500
400
300
200
100
0
= 1.21V, V
0
Guaranteed Dropout Voltage
= TEST POINTS
IN
IN
IN
IN
0.5
< 1.5V
< 1.8V
< 2.5V
< 3.3V
IN
OUTPUT CURRENT (A)
1.0
T
< 1.21V
J
≤ 125°C
T
J
≤ 25°C
1.5
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: V
Note 7: GND pin current is tested with V
2.7V (E grade) or V
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 LT1764A, LT1764A-1.5 and LT1764A-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
V
IN
= 20V, V
2.0
2.5
OUT
1764 G02
cannot be pulled below ground.
3.0
IN
= 2.8V (MP grade), whichever is greater, and a current
600
500
400
300
200
100
●
●
●
0
–50
IN
Dropout Voltage
– V
MIN
–25
3.1
3.1
DROPOUT
IN
I
= V
L
= 3A
0
OUT(NOMINAL)
TEMPERATURE (°C)
I
.
L
TYP
600
600
600
600
300
= 1.5A
4
25
A
I
L
= 25°C. (Note 2)
= 0.5A
50
I
L
+ 1V or V
= 100mA
1200
1200
1200
1200
MAX
600
75
1
I
L
100
= 1mA
IN
UNITS
1764afb
1764 G03
=
mA
125
µA
µA
µA
µA
µA
A
A
A