TDA3674 Datasheet, PDF (4/16 Pages) NXP Semiconductors – Low dropout voltage/quiescent current 5 V voltage regulator with enable

Philips Semiconductors
Low dropout voltage/quiescent current 5 V
voltage regulator with enable
Preliminary specification
TDA3674
FUNCTIONAL DESCRIPTION
The TDA3674 is a fixed 5 V regulator which can deliver
output currents up to 100 mA. The regulator is available in
an SO8 package with fused centre pins connected to the
lead frame. The regulator is intended for portable, mains,
telephone and automotive applications. To increase the
lifetime of batteries, a specially built-in clamp circuit keeps
the quiescent current of this regulator very low, also in
dropout and full load conditions.
The regulator remains operating down to very low supply
voltages and below it switches off.
A temperature protection circuit is included, which
switches off the regulator output at a junction temperatures
above 150 °C.
A new output circuit guarantees the stability of the
regulator for a capacitor output circuit with an ESR up to
20 Ω. If only a 100 nF capacitor is used, the regulator is
fully stable when I_REG > 200 µA. This is very attractive as
the ESR of an electrolytic capacitor increases strongly at
low temperatures (no expensive tantalum capacitor is
required).
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
V_P
V_P(rp)
P_tot
PARAMETER
supply voltage
TDA3674T
TDA3674AT
reverse polarity supply voltage
total power dissipation
T_stg
T_amb
T_j
storage temperature
ambient temperature
TDA3674T
TDA3674AT
junction temperature
CONDITIONS
non-operating
temperature of copper area
is 25 °C
non-operating
operating
operating
MIN.
−
−
−
−
−55
−40
−40
−40
MAX.
UNIT
33
V
45
V
−25
V
4.1
W
+150
°C
+85
°C
+125
°C
+150
°C
THERMAL CHARACTERISTICS
SYMBOL
R_th(j-a)
R_th(j-c)
PARAMETER
thermal resistance from junction to ambient
thermal resistance from junction to case
CONDITIONS
in free air; soldered
to centre pins; soldered
VALUE
125
30
UNIT
K/W
K/W
QUALITY SPECIFICATION
In accordance with “SNW-FQ-611E”.
2000 Feb 01
4