tda8138b STMicroelectronics, tda8138b Datasheet - Page 3

• Manufacturer Part Number: tda8138b
• Description: 5.1v+ 12v Regulator With Disable And Reset
• Manufacturer: STMicroelectronics

ELECTRICAL CHRACTERISTICS (V
CIRCUIT DESCRIPTION
The TDA8138 is a dual voltage regulator with Reset
and Disable (TD8138A : Disable only, TDA8138B :
Reset only).
The two regulation parts are supplied from one
voltage reference circuit trimmed by zener zap
during EWS test.
Since the supply voltage of this last is connected at
Pin 1 (V
not supplied.
The outputs stage have been realized in darlington
configuration with a drop typical 1.2V.
The disable circuit, switch-off the output 2 if a
voltage lower than 0.8V is applied at Pin 3
Note : Safe permanent short-circuit is only guaranteed for input voltages up to 16V.
Symbol
V
V
V
I
V
V
V
K
O1,2SC
V
O1,2LO
V
V
V
V
O1RST
O1,2LI
V
I
T
t
I
IO1,2
DISH
I
RTH
O1,2
DISL
DIS
RD
RH
O1
O2
O1
O2
Q
jsd
RL
IN1
), the regulator 2 will not work if Pin 1 is
Output Voltage
Output Voltage
Output Voltage
Output Voltage
Dropout Voltage
Line Regulation
Load Regulation
Quiescent Current
Reset Thrseshold Voltage
Reset Thrseshold Hysteresis
Reset Pulse Delay
Saturation Voltage in Reset Condition
Leakage Current in Normal Condition
(at Pin 6 for SIP9 or Pin 5 for Heptawatt)
Output Voltage Thermal Drift
Short Circuit Output Current
Disable Voltage High (out 2 active)
Disable Voltage Low (out 2 disabled)
Disable Bias Current
Junction Temperature for Thermal Shut
Down
Parameter
IN1
= 7V, V
IN2
I
I
7V < V
14 < V
5mA < I
I
I
7V < V
14 < V
I
5mA < I
5mA < I
I
Output 2 Disabled
K = V
See circuit description
C
See circuit description
I
V
T
K
V
V
0V < V
O1
O2
O1,2
O1,2
O1,2
O1
5
j
e
5
O
IN1
IN1,2
= 14V, T
= 5mA
= 0 to 125
= 10V
= 100nF
= 10mA
= 10mA
= 10mA
Test Conditions
= 750mA
= 1A
= 200mA
= 7V, V
O1
(Heptawatt) or Pin 4 (SIP9)
The Reset circuit checks the voltage at the out-
put 1. If this one goes below V
typ.), the comparator "a" (see Figure 1) discharges
rapidly the capacitor C
at once Low. When the voltage at the out1 rises
above V
increases linearly to 2.5V corresponding to a delay
td following the law : t
then the reset output goes high again. To avoid
gliches in the reset output, the second comparator
"b" has a large hysteresis (1.9V).
= 16V (see Note)
IN2
IN2
IN1
IN1
V
DIS
T V
O1,2
O1
O2
O
< 18V
< 18V
< 14V
< 14V
< 7V
< 0.6A
< 0.6A
10
j
< 750mA
IN2
o
O
= 25
C
6
= 14V
OUT
o
C, unless otherwise specified)
- 0.2V (4.9V typ.), the voltage V
K - 0.4
11.76
Min.
11.5
-100
4.9
20
5
2
1
e
and the reset output goes
C
e
10 A
Typ.
0.25
100
145
5.1
K -
25
12
50
2.5V
OUT
K - 0.1
- 0.25V (4.85V
(see Figure 2),
12.24
Max.
12.5
120
100
250
5.2
5.3
1.4
0.4
1.6
0.8
50
75
10
2
2
1
2
TDA8138
ppm/
Unit
mV
mV
mV
mV
mA
mV
ms
o
V
V
V
V
V
V
V
V
A
A
V
V
C
A
A
o
3/6
C
Ce