LP2951-03BM Micrel Inc, LP2951-03BM Datasheet - Page 10

• Manufacturer Part Number: LP2951-03BM
• Description: IC REG LDO ADJ 100MA 8SOIC
• Manufacturer: Micrel Inc

Specifications of LP2951-03BM

• Regulator Topology: Positive Adjustable
• Voltage - Output: 1.24 ~ 29 V
• Voltage - Input: 2.3 ~ 30 V
• 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)
• Primary Input Voltage: 30V
• Output Voltage Fixed: 5V
• Dropout Voltage Vdo: 380mV
• No. Of Pins: 8
• Output Current: 100mA
• Operating Temperature Range: -40°C To +125°C
• Termination Type: SMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Lead free / RoHS Compliant

Noise can be reduced fourfold by a bypass capacitor
across R
4 to unity. Pick:
or about 0.01µF. When doing this, the output capacitor
must be increased to 3.3µF to maintain stability. These
changes reduce the output noise from 430µV to
100µVrms for a100kHz bandwidth at 5V output. With the
bypass capacitor added, noise no longer scales with
output voltage so that improvements are more dramatic
at higher output voltages.
Micrel, Inc.
September 2008
C
1
, since it reduces the high frequency gain from
BYPASS
≅
2
π
R
1
•
1
200Hz
10
Figure 1. ERROR Output Timing
Figure 2. Adjustable Regulator
M9999-091208
LP2950/2951