LT1962EMS8-3.3#PBF Linear Technology, LT1962EMS8-3.3#PBF Datasheet - Page 10

• Manufacturer Part Number: LT1962EMS8-3.3#PBF
• Description: IC LDO REG LOWNOISE 3.3V 8-MSOP
• Manufacturer: Linear Technology

Specifications of LT1962EMS8-3.3#PBF

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 20V
• Voltage - Dropout (typical): 0.27V @ 300mA
• Number Of Regulators: 1
• Current - Output: 300mA
• Current - Limit (min): 320mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Voltage Regulator Type: Linear
• Topology: LDO
• Regulator Output Type: Fixed
• Polarity Type: Positive
• Number Of Outputs: Single
• Input Voltage (min): 1.8V
• Input Voltage (max): 20V
• Output Voltage: 3.3V
• Package Type: MSOP
• Output Current: 300mA
• Load Regulation: 17mV
• Line Regulation: 5mV
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Dropout Voltage@current (max): 0.15@10mA/0.33@300mA
• Dropout Voltage@current (typ): 0.1@10mA/0.27@300mA
• Pin Count: 8
• Mounting: Surface Mount
• Primary Input Voltage: 20V
• Output Voltage Fixed: 3.3V
• Dropout Voltage Vdo: 270mV
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

100 V/DIV
OUT (Pin 1): Output. The output supplies power to the
load. A minimum output capacitor of 3.3 F is required to
prevent oscillations. Larger output capacitors will be
required for applications with large transient loads to limit
peak voltage transients. See the Applications Information
section for more information on output capacitance and
reverse output characteristics.
SENSE (Pin 2): Sense. For fixed voltage versions of the
LT1962 (LT1962-1.5/LT1962-1.8/LT1962-2.5/LT1962-3/
LT1962-3.3/LT1962-5), the SENSE pin is the input to the
error amplifier. Optimum regulation will be obtained at the
point where the SENSE pin is connected to the OUT pin of
the regulator. In critical applications, small voltage drops
LT1962 Series
TYPICAL PERFOR A CE CHARACTERISTICS
100 V/DIV
PI FU CTIO S
10
U
V
V
OUT
OUT
LT1962-5 10Hz to 100kHz
Output Noise (C
C
I
LT1962-5 10Hz to 100kHz
Output Noise (C
C
I
L
L
OUT
OUT
= 300mA
= 300mA
U
= 10 F
= 10 F
1ms/DIV
1ms/DIV
U
BYP
BYP
= 0)
= 0.01 F)
W
U
1962 G52
1962 G55
100 V/DIV
–0.2
–0.4
300
200
100
0.4
0.2
V
OUT
0
0
LT1962-5 Transient Response
0
V
C
C
C
LT1962-5 10Hz to 100kHz
Output Noise (C
C
I
IN
IN
OUT
BYP
L
OUT
0.2
= 300mA
= 6V
= 10 F
= 10 F
= 0
= 10 F
0.4
0.6 0.8
TIME (ms)
1ms/DIV
1.0
are caused by the resistance (R
regulator and the load. These may be eliminated by con-
necting the SENSE pin to the output at the load as shown
in Figure 1 (Kelvin Sense Connection). Note that the
voltage drop across the external PC traces will add to the
dropout voltage of the regulator. The SENSE pin bias
current is 10 A at the nominal rated output voltage. The
SENSE pin can be pulled below ground (as in a dual supply
system where the regulator load is returned to a negative
supply) and still allow the device to start and operate.
ADJ (Pin 2): Adjust. For the adjustable LT1962, this is the
input to the error amplifier. This pin is internally clamped
to 7V. It has a bias current of 30nA which flows into the
BYP
1.2
= 100pF)
1.4
1.6
1.8
1962 G56
1962 G53
2.0
100 V/DIV
–0.05
–0.10
0.10
0.05
300
200
100
V
OUT
0
0
0
LT1962-5 Transient Response
C
I
LT1962-5 10Hz to 100kHz
Output Noise (C
L
OUT
50
= 300mA
= 10 F
P
100
) of PC traces between the
150 200
TIME ( s)
1ms/DIV
250
BYP
300
= 1000pF)
350
V
C
C
C
IN
IN
OUT
BYP
= 6V
= 10 F
400
= 0.01 F
= 10 F
450
1962 G57
1962 G54
500