LP2951ACMX-3.3/NOPB National Semiconductor, LP2951ACMX-3.3/NOPB Datasheet - Page 17

• Manufacturer Part Number: LP2951ACMX-3.3/NOPB
• Description: IC VREG MICROPWR 8-SOIC
• Manufacturer: National Semiconductor

Specifications of LP2951ACMX-3.3/NOPB

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 30V
• Voltage - Dropout (typical): 0.38V @ 100mA
• Number Of Regulators: 1
• Current - Output: 100mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Peak Reflow Compatible (260 C): Yes
• Voltage Regulator Type: Linear
• Topology: LDO
• Regulator Output Type: Fixed
• Polarity Type: Positive
• Number Of Outputs: Single
• Input Voltage (max): 30V
• Output Voltage: 3.3V
• Package Type: SOIC N
• Output Current: 100mA
• Load Regulation: 0.1%
• Line Regulation: 0.1%
• Output Voltage Accuracy: ±0.5%
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Pin Count: 8
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Compliant
• Other names: *LP2951ACMX-3.3; *LP2951ACMX-3.3/NOPB; LP2951ACMX-3.3

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flag becomes active when V
of Reg. #2 becomes active and via Q1 latches the main output off. When V
exceeds 5.7V Reg. #1 is back in regulation and the early warning signal rises,
unlatching Reg. #2 via D3.
For 5V
Early warning flag on low input voltage
Main output latches off at lower input voltages
Battery backup on auxiliary output
Operation: Reg. #1's V
Regulator with Early Warning and Auxiliary Output
out
, use internal resistors. Wire pin 6 to 7, & wire pin 2 to +V
out
in
is programmed one diode drop above 5V. Its error
≤
5.7V. When V
in
drops below 5.3V, the error flag
2 Ampere Low Dropout Regulator
854611
out
Bus.
in
again
17
Latch Off When Error Flag Occurs
854613
854612
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