TDA3681J/N2S,112 NXP Semiconductors, TDA3681J/N2S,112 Datasheet - Page 21

• Manufacturer Part Number: TDA3681J/N2S,112
• Description: IC REG MULTIPLE VOLTAGE SOT243
• Manufacturer: NXP Semiconductors

Specifications of TDA3681J/N2S,112

• Package / Case: *
• Applications: Ignition Buffer, Regulator
• Current - Supply: 110µA
• Voltage - Supply: 9.5 V ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Number Of Outputs: 4
• Polarity: Positive
• Output Voltage: 8.5 V, 5 V, 3.3 V
• Output Type: Fixed
• Dropout Voltage (max): 0.7 V at 550 mA or 0.6 V at 100 mA
• Line Regulation: 75 mV
• Load Regulation: 150 mV
• Maximum Power Dissipation: 62 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935289137112

Philips Semiconductors
Application information
N
Table 1 Noise figures
Note
1. Measured at a bandwidth of 30 kHz.
The noise on the supply line depends on the value of the
supply capacitor and is caused by a current noise (the
output noise of the regulators is translated to a current
noise by the output capacitors). The noise is minimal when
a high frequency capacitor of 220 nF in parallel with an
electrolytic capacitor of 100 F is connected directly to the
supply pins V
S
The regulators are stabilized by the externally connected
output capacitors.
2004 Mar 31
handbook, halfpage
REGULATOR
TABILITY
OISE
Multiple voltage regulator with switch and
ignition buffer
Fig.12 Curve for selecting the value of the output
1
2
3
4
ESR
( )
capacitor for regulators 1, 3 and 4.
20
15
10
5
0
P1
0.1
, V
C
P2
o
= 10 F C
and GND.
170
440
120
85
stable region
1
NOISE FIGURE ( V)
maximum ESR
o
10
= 47 F C
110
240
100
70
C ( F)
MGL912
100
o
(1)
= 100 F
110
190
80
55
21
The output capacitors can be selected by using the graphs
given in Figs 12 and 13. When an electrolytic capacitor is
used, its temperature behaviour can cause oscillations at
a low temperature. The two examples below show how an
output capacitor value is selected.
Example 1
Regulators 1, 3 and 4 are stabilized with an electrolytic
output capacitor of 220 F (ESR = 0.15 ).
At T
73 F and the ESR is increased to 1.1 . The regulator
remains stable at T
Example 2
Regulator 2 is stabilized with a 10 F electrolytic capacitor
(ESR = 3 ). At T
decreased to 3 F and the ESR is increased to 23.1 .
As can be seen from Fig.13, the regulator will be unstable
at T
Solution
To avoid problems with stability at low temperatures, the
use of tantalum capacitors is recommended. Use a
tantalum capacitor of 10 F or a larger electrolytic
capacitor.
handbook, halfpage
Fig.13 Curve for selecting the value of the output
amb
amb
= 30 C.
ESR
( )
30 C, the capacitor value is decreased to
capacitor for regulator 2.
14
12
10
8
6
4
2
0
2
0.22
amb
amb
= 30 C, the capacitor value is
= 30 C; see Fig.12.
1
maximum ESR
minimum ESR
stable region
10
Product specification
C ( F)
TDA3681
MGL913
100