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MC33160DWR2

P1-P3P4-P6P7-P9P10-P10
MC34160, MC33160
http://onsemi.com
4
Figure 6. Power Warning Comparator Delay
versus Temperature
Figure 7. Uncommitted Comparator Delay
versus Temperature
Figure 8. Comparator Output Saturation
versus Sink Current
Figure 9. P Suffix (DIP−16) Thermal Resistance and
Maximum Power DIssipation versus
P.C.B. Copper Length
T
A
, AMBIENT TEMPERATURE (°C)
, OUTPUT DELAY TIME (ns)
DLY
800
600
400
200
-55 -25 0 25 50 75 100 125
t
V
CC
= 30 V
V
in
(Pin 9) = 2.5 V to 2.7 V
R
L
= 2.4 k to V
O
Output Rise
Output Fall
Output Fall
, OUTPUT DELAY TIME (ns)
DLY
t
T
A
, AMBIENT TEMPERATURE (°C)
440
360
280
200
120
-55 -25 0 25 50 75 100 125
Output Rise
V
CC
= 30 V
V
Pin
1
= 2.5 V to 2.9 V
V
Pin
2
= 2.6 V
R
L
= 2.4 k to V
O
I
Sink
, SINK CURRENT (mA)
, OUTPUT SATURATION (V)
OL
0.5
0.4
0.3
0.2
0.1
0
0 2.0 4.0 6.0 8.0
V
V
CC
= 6.0 V
V
Pin
1
= V
ref
V
Pin
2,
9
= 10 kW to GND
V
sat
= Pins 6, 7, 8
T
A
= 85°C
T
A
= 25°C
T
A
= -40°C
L, LENGTH OF COPPER (mm)
, THERMAL RESISTANCE JUNCTION TO AIR (C/W)
θJA
°
, MAXIMUM POWER DISSIPATION (W)
D
100 20304050
100
80
60
40
20
00
1.0
2.0
3.0
4.0
5.0
L
Printed circuit board heatsink example
Graphs represent symmetrical layout
2.0 oz.
Copper
L
3.0 mm
P
D(max)
for T
A
= 70°C
R
θ
JA
R
P
Figure 10. DW Suffix (SOP−16L) Thermal Resistance and
Maximum Power Dissipation versus P.C.B. Copper Length
30
40
50
60
70
80
90
0
0.4
0.8
1.2
1.6
2.0
2.4
02030504010
L, LENGTH OF COPPER (mm)
100
2.8
P
D(max)
for T
A
= 50°C
R
θ
JA
P
D
R , THERMAL RESISTANCE
JAθ
JUNCTION‐TO‐AIR ( C/W)°
, MAXIMUM POWER DISSIPATION (W)
2.0 oz.
Copper
Graph represents symmetrical layout
3.0 mmL
L
MC34160, MC33160
http://onsemi.com
5
PIN FUNCTION DESCRIPTION
Pin Function Description
1 Comparator Inverting
Input
This is the Uncommitted Comparator Inverting input. It is typically connected to a resistor
divider to monitor a voltage.
2 Comparator Noninverting
Input
This is the Uncommitted Comparator Noninverting input. It is typically connected to a
reference voltage.
3 N.C. No connection. This pin is not internally connected.
4, 5, 12, 13 GND These pins are the control circuit grounds and are connected to the source and load ground
returns. They are part of the IC lead frame and can be used for heatsinking.
6 Comparator Output This is the Uncommitted Comparator output. It is an open collector sink−only output requiring
a pullup resistor.
7 Reset This is the Reset Comparator output. It is an open collector sink−only output requiring a
pullup resistor.
8 Power Warning This is the Power Warning Comparator output. It is an open collector sink−only output
requiring a pullup resistor.
9 Power Sense This is the Power Warning Comparator noninverting input. It is typically connected to a
resistor divider to monitor the input power source voltage.
10 Hysteresis Adjust The Power Warning Comparator hysteresis is programmed by a resistor connected from this
pin to ground.
11 Regulator Output This is the 5.0 V Regulator output.
14 V
CC
This pin is the positive supply input of the control IC.
15 Chip Disable This input is used to switch the IC into a standby mode turning off all outputs.
16 V
ref
This is the 2.6 V Reference output. It is intended to be used in conjunction with the Power
Warning and Uncommitted comparators.
OPERATING DESCRIPTION
The MC34160 series is a monolithic voltage regulator and
supervisory circuit containing many of the necessary
monitoring functions required in microprocessor based
systems. It is specifically designed for appliance and
industrial applications, offering the designer a cost effective
solution with minimal external components. These devices
are specified for operation over an input voltage of 7.0 V to
40 V, and with a junction temperature of −40° to +150°C. A
typical microprocessor application is shown in Figure 11.
Regulator
The 5.0 V regulator is designed to source in excess of
100 mA output current and is short circuit protected. The
output has a guaranteed tolerance of ±5.0% over line, load,
and temperature. Internal thermal shutdown circuitry is
included to limit the maximum junction temperature to a
safe level. When activated, typically at 170°C, the
regulator output turns off.
In specific situations a combination of input and output
bypass capacitors may be required for regulator stability. If
the regulator is located an appreciable distance (≥ 4″) from
the supply filter, an input bypass capacitor (C
in
) of 0.33 mF
or greater is suggested. Output capacitance values of less
than 5.0 nF may cause regulator instability at light load
(≤ 1.0 mA) and cold temperature. An output bypass
capacitor of 0.1 mF or greater is recommended to ensure
stability under all load conditions. The capacitors selected
must provide good high frequency characteristics.
Good construction techniques should be used to
minimize ground loops and lead resistance drops since the
regulator does not have external sense inputs.
Reference
The 2.6 V bandgap reference is short circuit protected
and has a guaranteed output tolerance of ±5.0% over line,
load, and temperature. It is intended to be used in
conjunction with the Power Warning and Uncommitted
comparator. The reference can source in excess of 2.0 mA
and sink a maximum of 10 mA. For additional current
sinking capability, an external load resistor to ground must
be used.
Reference biasing is internally derived from either V
CC
or V
O
, allowing proper operation if either drops below
nominal.
Chip Disable
This input is used to switch the IC into a standby mode.
When activated, internal biasing for the entire die is
removed causing all outputs to turn off. This reduces the
power supply current (I
CC
) to less than 0.3 mA.
MC34160, MC33160
http://onsemi.com
6
Comparators
Three separate comparators are incorporated for voltage
monitoring. Their outputs can provide diagnostic information
to the microprocessor, preventing system malfunctions.
The Reset Comparator Inverting Input is internally
connected to the 2.6 V reference while the Noninverting
Input monitors V
O
. The Reset Output is active low when
V
O
falls approximately 180 mV below its regulated
voltage. To prevent erratic operation when crossing the
comparator threshold, 70 mV of hysteresis is provided.
The Power Warning Comparator is typically used to
detect an impending loss of system power. The Inverting
Input is internally connected to the reference, fixing the
threshold at 2.6 V. The input power source V
in
is monitored
by the Noninverting Input through the R
1
/R
2
divider
(Figure 11). This input features an adjustable 10 mA to 50
mA current sink I
H
that is programmed by the value selected
for resistor R
H
. A default current of 6.5 mA is provided if
R
H
is omitted. When the comparator input falls below 2.6
V, the current sink is activated. This produces hysteresis if
V
in
is monitored through a series resistor (R
1
). The
comparator thresholds are defined as follows:
R1
R
2
1 +
− I
IB
R
1
V
th(lower)
= V
ref
R1
R
2
1 +
+ I
H
R
1
V
th(upper)
= V
ref
The nominal hysteresis current I
H
equals 1.2 V/R
H
(Figure 5).
The Uncommitted Comparator can be used to
synchronize the microprocessor with the ac line signal for
timing functions, or for synchronous load switching. It can
also be connected as a line loss detector as shown in
Figure 12. The comparator contains 200 mV of hysteresis
preventing erratic output behavior when crossing the input
threshold.
The Power Warning and Uncommitted Comparators
each have a transistor base−emitter connected across their
inputs. The base input normally connects to a voltage
reference while the emitter input connects to the voltage to
be monitored. The transistor limits the negative excursion
on the emitter input to − 0.7 V below the base input by
supply current from V
CC
. This clamp current will prevent
forward biasing the IC substrate. Zener diodes are
connected to the comparator inputs to enhance the ICs
electrostatic discharge capability. Resistors R
1
and R
in
must limit the input current to a maximum of ±2.0 mA.
Each comparator output consists of an open collector
NPN transistor capable of sinking 2.0 mA with a saturation
voltage less than 0.4 V, and standing off 40 V with minimal
leakage. Internal bias for the Reset and Power Warning
Comparators is derived from either V
CC
or the regulator
output to ensure functionality when either is below
nominal.
Heat Tab Package
The MC34160 is contained in a 16 lead plastic
dual−in−line package in which the die is mounted on a
special Heat Tab copper alloy lead frame. This tab consists
of the four center ground pins that are specifically designed
to improve thermal conduction from the die to the
surrounding air. The pictorial in Figure 9 shows a simple
but effective method of utilizing the printed circuit board
medium as a heat dissipator by soldering these tabs to an
adequate area of copper foil. This permits the use of
standard board layout and mounting practices while having
the ability to more than halve the junction to air thermal
resistance. The example and graph are for a symmetrical
layout on a single sided board with one ounce per square
foot copper.
=
Sink Only
Positive True Logic
AC
Line
Line Sync.
Power Warning
V
ref
MPU Reset
C
O
V
O
Uncommitted
Comparator
4, 5, 12, 13
2.6 V
Reference
Thermal
Shutdown
Power
Warning
V
in
R
1
R
2
2.6 V
R
in
Chip
Disable
Reset
R
.01 R
I
H
On/Off
C
in
V
CC
14
15
9
10
2
1
0.913 R
11
7
16
8
6
I
H
R
H
+
+
+
+
+
-
-
-
-
-
+
+
+
Figure 11. Typical Microprocessor Application
P1-P3P4-P6P7-P9P10-P10

MC33160DWR2

Mfr. #:
Buy MC33160DWR2
Manufacturer:
ON Semiconductor
Description:
Linear Voltage Regulators 5V 100mA Supervisor
Lifecycle:
New from this manufacturer.
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