DUAL 5. 1V REG ULATOR WI TH DISABL E AND RESE T
.
OUTPUT CURRENTS UP TO 1A
.
FIXED PRECISION OUTPUT VOLTAGES
5.1V ± 2%
.
OUTPUT 1 WITH RESE T FACILITY
.
OUTPUT 2 WITH DISABLE BY TTL INPUT
.
SHORT CIRCUIT PROTECTION AT BOTH
OUTPUTS
.
THERMAL PROTE CT ION
.
LOW DROP OUTPUT VOLTAGE
DESCRIPTION
The TDA8137 is a monolithic dual positive v oltage
regulator designed to provide fixed precision output
voltages of 5.1V at currents up to 1A.
An internal reset circuit generates a reset pulse
when the output 1 decreases below the regulated
voltage value.
Output 2 can be disabled by TTL input.
Short circuit and thermal protections are included.
TDA8137
HEPTAWATT
(Plastic Package)
ORDER CODE : TDA8137
PIN CONNECTION (top view)
Tab connected to Pin 4
7
6
5
4
3
2
1
OUTPUT 1
OUTPUT 2
RESET
GROUND
DISABLE
DELAY CAP
INPUT
8137-01.EPS
September 1993
1/5
TDA8137
BLOCK DIAGRAM
IN
1
REFERENCE
PROTECTION
3
DISABLE
4
OUT 1
RESET
OUT 2
TDA8137
OUT 1
7
5
RESET
2
DELAY
CAPACITOR
6
OUT 2DISABLE
C
R
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
I
01, 2
T
IN
DIS
RST
P
STG
T
DC Input Voltage Pin 1 20 V
Disable Input Voltage Pin 3 20 V
Output Voltage at Pin 5 20 V
Output Currents Internally Limited
Power Dissipation Internally Limited
t
Storage Temperature – 65 to + 150 °C
Junction Temperature 0 to + 150 °C
j
8137-02.EPS
8137-04.TBL
THERMAL DA TA
Symbol Parameter Value Unit
R
TH(j-c)
T
ELECTRICAL CHARACT E RIS TICS (V
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
01, 2
V
I 01, 2
∆ V
01, 2LI
∆ V
01, 2LO
I
Q
V
01RST
V
RTH
t
RD
V
RL
2/5
Thermal Resistance Junction-case Max. 3 °C/W
Recommended Junction Temperature Max. 0 to + 150 °C
j
= 7V ; Tj = 25oC unless otherwise specified)
IN
Output Voltage I
Dropout Voltage I
Line Regulation 7V < VIN < 14V, I
Load Regulation 5mA < I
= 10mA 5 5.1 5.2 V
01, 2
7V < V
I
< 14V, 5mA < I0 < 750mA 4.9 5.3 V
IN
= 750mA 1.4 V
01, 2
= 1A 2 V
01, 2
= 200mA 50 mV
01, 2
< 0.6A 100 mV
01, 2
Quiescent Current I01 = 10mA, Output 2 Disabled 2 mA
Reset Threshold Voltage (K = V01) K–0.4 K–.25 K–0.1 V
Reset Threshold Hysteresis (see circuit description) 20 50 75 mV
Reset Pulse Delay at Pin 5 Ce = 100nF (see circuit description) 25 ms
Saturation Volt. at Pin 5 in
I5 = 5mA 0.4 V
Reset Condition
8137-02.TBL
8137-03.TBL
TDA8137
ELECTRICAL CHARACT E RIS TICS (V
= 7V ; Tj = 25oC unless otherwise specified) (continued)
IN
Symbol Parameter Test Conditions Min. Typ. Max. Unit
I
K
Leakage Current at Pin 5 in Normal Condition V5 = 10V 10 µA
RH
Output Volt. Thermal Drift
01,2
⋅ 10
o
∆T ⋅ V
6
O
∆V
=
K
0
100 ppm/°C
Tj = 0 to + 125°C
I
01,2SC
V
DISH
V
DISL
I
DIS
T
Note 1 : The output short circuit currents are tested one channel at time.
During a short circuit a large consumption of power occurs, anyway the thermal protection circuit guarantees the temperature not overcomes high value.
Safe permanent short-circuit is only guaranteed for input volt a ges up to 16V.
Short Circ. Output Current VIN = 7V 1.6 A
= 16V, (see note 1) 1 A
V
IN
Disable Volt. at Pin 3 High (out 2 active) 2 V
Disable Volt. at Pin 3 Low (out 2 disabled) 0.8 V
Disable Bias Current at Pin 3 0V < V
Junction Temp. for Thermal Shut Down 145 °C
jsd
< 7V -100 2 µA
DIS
Figure 1
10µA
RESET
5
OUT 1
REF
2.5V
7
a
+
50
-
b
+
2
8137-04.TBL
Figure 2
REG
5.1V
4.9V
4.85V
RESET
C
e
T
D
2.5V 0.6V
T
∆
VOUT LOW
D
8137-03.EPS
8137-04.EPS
3/5
TDA8137
CIRCUIT DESCRIPTION
The TDA8137 is a dual voltage regulator with Reset
and Disable.
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 work if the Pin 1 is not supplied.
The outputs stages have been realized in darlington configuration with a drop typical of 1.2V.
The disable circuit, switches off the output 2 if a
voltage lower than 0.8V is applied at pin 3.
TYPICAL APPL ICA T ION
), the regulator 2 will
IN1
The Reset circuit checks the voltage at the output
1. If this one goes below V
- 0.25V (4.85V T yp.),
OUT
the comparator "a" (see Figure 1) discharges rapidly the capacitor Ce and the reset output goes at
once low. When the voltage at the OUT 1 rises
above V
-0.2V (4.9V Typ.), the voltage V
OUT
Ce
increases linearly to 2.5V corresponding to a delay
⋅ 2.5
t
following the low : td =
d
Ce
10µA
V
(see figure 2),
then the reset output goes high again. To avoid
glitches in the reset output, the second comparat or
"b" has a large hysteresis (1.9V).
V
IN1
1
7
TDA8137
2
C1 C3
Ce C2
4
5 3
RESET
C1 C3 = 10µF
.
.
DISABLE
6
V
O1
V
O2
8137-05.EPS
4/5
PACKAGE MECHANICAL DATA
9 PINS - PLASTIC HEPTAWATT
TDA8137
Dimensions
L
L1
A
C
L5
H3
Dia.
L7
D1
L6
D
L2
L3
F1
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
E
MM1
G
G2
G1
F
H2
A 4.8 0.189
C 1.37 0.054
D 2.4 2.8 0.094 0.110
D1 1.2 1.35 0.047 0.053
E 0.35 0.55 0.014 0.022
F 0.6 08 0.024 0.031
F1 0.9 0.035
G 2.41 2.54 2.67 0.095 0.100 0.105
G1 4.91 5.08 5.21 0.193 0.200 0.205
G2 7.49 7.62 7.8 0.295 0.300 0.307
H2 10.4 0.409
H3 10.05 10.4 0.396 0.409
L 16.97 0.668
L1 14.92 0.587
L2 21.54 0.848
L3 22.62 0.891
L5 2.6 3 0.102 0.118
L6 15.1 15.8 0.594 0.622
L7 6 6.6 0.236 0.260
M 2.8 0.110
M1 5.08 0.200
Dia. 3.65 3.85 0.144 0.152
Information furnished i s believed to be accurate and rel iabl e. However, S GS-THOMSON Microel ectroni cs assumes no responsibil ity
for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.
PM-HEPTV.EPS
HEPTV.TBL
© 1994 SGS-THOMSON Microelectronics - All Rights Reserved
2
Purchase of I
2
C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to
I
Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco
The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips
2
C Standard Specifications as defined by Philips.
the I
SGS-THOMSON Microelectronics GROUP OF COMPANIES
5/5
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