L4949D ON Semiconductor, L4949D Datasheet - Page 6

• Manufacturer Part Number: L4949D
• Description: IC REG LDO 5V 100MA RST 8-SOIC
• Manufacturer: ON Semiconductor

Specifications of L4949D

• Regulator Topology: Positive Fixed
• Voltage - Output: 5V
• Voltage - Input: Up to 28V
• Voltage - Dropout (typical): 0.3V @ 100mA
• Number Of Regulators: 1
• Current - Output: 100mA
• Current - Limit (min): 105mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Supply Voltage Transient
signal perturbation. For supply voltages greater than 8.0 V
the circuit shows a high immunity of the reset output against
supply transients of more than 100 V/ms. For supply voltages
NOTE:
V
High supply voltage transients can cause a reset output
bat
1. For stability: C
2. Recommended for application: C
C
s
V
s
CC
S
1
2
≥ 1.0 mF, C
i
V
CC
O
Regulator
≥ 4.7 mF, ESR < 10 W at 10 kHz
Preregulator
s
1.23 V
= C
(optional)
6.0 V
APPLICATION INFORMATION
Figure 14. Application Schematic
V
O
Z
ref
= 10 mF
http://onsemi.com
C3
3
6
less than 8.0 V supply transients of more than 0.4 V/ms can
cause a reset signal perturbation. To improve the transient
behavior for supply voltages less than 8.0 V a capacitor at
Pin 3 can be used. A capacitor at Pin 3 (C3 ≤ 1.0 mF) also
reduces the output noise.
V
5
out
Reset
GND
8
C
2.0 mA
O
Sense
C
T
4
+
-
+
-
2.0 V
1.23 V
6
7
R
SO
10 kW
10 kW
V
Reset
out
S
o