l4949dw ON Semiconductor, l4949dw Datasheet - Page 6
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l4949dw
Manufacturer Part Number
l4949dw
Description
5v / 100ma Ldo W/ Reset, Delay Reset And Early Warning
Manufacturer
ON Semiconductor
Datasheet
1.L4949DW.pdf
(12 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
L4949DW
Manufacturer:
ON/安森美
Quantity:
20 000
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 12. Application Schematic
V
O
Z
ref
= 10 mF
L4949, NCV4949
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