TDA3664ATD-T NXP Semiconductors, TDA3664ATD-T Datasheet - Page 7

• Manufacturer Part Number: TDA3664ATD-T
• Description: Switching Converters, Regulators & Controllers LDO REGULATOR
• Manufacturer: NXP Semiconductors

Specifications of TDA3664ATD-T

• Mounting Style: SMD/SMT
• Package / Case: SOT-96
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: TDA3664AT/N1,118

NXP Semiconductors
TDA3664_7
Product data sheet
11.3.1 Application circuit with backup function
11.3 Application circuits
Table 8:
The maximum output current of the regulator equals:
When T
The total thermal resistance of the TDA3664 (SOT223-1 package) can be decreased to
lower values when pin 4 and body of the package are soldered to the printed-circuit board.
Sometimes, a backup function is needed to supply, for example, a microcontroller for a
short period of time when the supply voltage spikes to 0 V (or even 1 V).
This function can easily be built with the TDA3664 by using a large output capacitor. When
the supply voltage is 0 V (or 1 V), only a small current will flow into pin REG from this
large output capacitor (a few A).
The application circuit is given in
I
I
1
5
10
100
REG
REG max
Fig 4. Application circuit with backup function (SO4 version)
•
Remark: In the event of using different types of capacitors, a minimum ESR needs to
be created by using an additional resistor that is placed in series with the output
capacitor, see
It is recommended not to use below 1 mA output current because of reduced phase
margin.
(mA) max
(1) C1 is optional (to minimize supply noise only)
(2) C2
(3) V
(4) For reliable operation, it is recommended to have a minimum ESR of 3
amb
capacitor total (see
current, temperature or output capacitance.
REG
=
Minimum ESR values required
= 21 C, the maximum output current equals 140 mA at V
4700 F
--------------------------------------------------------- -
R
= 5 V
th j a
C2 = 100 nF
> 0
> 1
> 0
> 0
–
Figure
150 T
Very low dropout voltage/quiescent current 5 V voltage regulator
–
Rev. 07 — 25 June 2007
V
Figure 4
P
4.
amb
–
V
P
V
C1 (1)
1 F
REG
above) and to have a stable application independent of load
Figure
C2 = 1 F
> 1.5
> 0.5
> 0.5
> 0.5
=
----------------------------------- - mA
100
1
TDA3664
4.
150 T
2, 4
–
V
3
P
amb
–
5
014aaa089
C2 = 10 F
> 2.5
> 1
> 4
> 4
C2 (2)
V
REG
(3)
of the output
P
TDA3664
© NXP B.V. 2007. All rights reserved.
=14 V.
C2 = 100 F
> 0
> 0
> 0
> 0
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