Microsemi MC34064DM Undervoltage sensing circuit Datasheet

MC33064/MC34064
U N D E RV O LTA G E S E N S I N G C I R C U I T
T
H E
I
P
N F I N I T E
O W E R
O F
I
P
N N O VA T I O N
R O D U C T I O N
DESCRIPTION
The MC34064 is an undervoltage
sensing circuit designed specifically for
use as a reset controller in microprocessor-based systems. It offers the designer
an economical, space-efficient solution
for low supply voltage detection when
used in combination with a single pullup resistor. Adding one capacitor offers
the functionality of a programmable
delay time after power returns. The
34064 consists of a temperature stable
reference comparator with hysteresis,
high-current clamping diode and open
collector output stage capable of
sinking up to 60mA. The MC34064's
RESET output is specified to be fully
functional at VIN=1V. A major improvement over competing products is the
glitch-free supply current during
undervoltage detection. Competing
products demand a step function
increase in operating current during the
time that you least want or need it....
during power loss. See Product
Highlight below.
! Ultra-Low Supply Current (500µA Max.)
! Temperature Compensated ICC For
Extremely Stable Current Consumption
! µP Reset Function Programmable With 1
External Resistor And Capacitor
! Comparator Hysteresis Prevents Output
Oscillation
! Electrically Compatible With Motorola
MC34064
■ Simple 5V Undervoltage Detection
SWITCHING REGION
(ICC) Supply Current - ( A)
■ Glitch-Free Supply Current During
Switching (See Product Highlight)
■ All Microprocessor Or Microcontroller
Designs Using 5V Supplies
370
355
ACTIVE
REGION
325
■ Outputs Fully Defined At VIN = 1V (See
Figure 1)
APPLICATIONS
RL = No Load
340
H E E T
■ Monitors 5V Supplies (VT = 4.6V Typ.)
I N P U T V O L TA G E
400
385
S
! Pin-to-Pin Compatible With Motorola
MC34064/MC34164.
PRODUCT HIGHLIGHT
VS.
A T A
K E Y F E AT U R E S
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
S U P P LY C U R R E N T
D
310
MONITOR
REGION
295
280
265
250
-10
-8
-6
-4
-2
0
2
4
6
8
10
Input Voltage less Threshold Voltage - (mV)
PA C K A G E O R D E R I N F O R M A T I O N
TA (°C)
SOIC
DM Plastic
8-pin
TO-92
LP Plastic
3-pin
0 to 70
MC34064DM
MC34064LP
-40 to 85
MC33064DM
MC33064LP
-55 to 125
—
—
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. MC34064DMT)
Copyright © 1999
Rev. 1.3 6/99
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
T RANSIENT I MMUNE U NDERVOLTAGE S ENSING C IRCUIT
P
R O D U C T I O N
ABSOLUTE MAXIMUM RATINGS
D
A T A
S
H E E T
PACKAGE PIN OUTS
(Note 1)
Input Supply Voltage (VIN) ............................................................................... -1V to 10V
RESET Output Voltage (VOUT) ..................................................................................... 10V
Output Sink Current (IOL) ............................................................ Internally Limited (mA)
Clamp Diode Forward Current (IF), Pin 1 to pin 2 ............................................... 100mA
Operating Junction Temperature
Plastic (DM, LP - Packages) .................................................................................. 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C
RESET
VIN
N.C.
GROUND
1
8
2
7
3
6
4
5
N.C.
N.C.
N.C.
N.C.
DM PACKAGE
(Top View)
Note 1. Values beyond which damage may occur. All voltages are specified with respect to
ground, and all currents are positive into the specified terminal.
3. GROUND
2. VIN
1. RESET
THERMAL DATA
LP PACKAGE
(Top View)
DM PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
165°C/W
LP PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
156°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system.
All of the above assume no ambient airflow
BLOCK D IA GR A M
VIN
RESET
1.2 VREF
GROUND
2
Copyright © 1999
Rev. 1.3 6/99
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
U N D E RV O LTA G E S E N S I N G C I R C U I T
P
D
R O D U C T I O N
A T A
S
H E E T
R E C O M M E N D E D O P E R AT I N G C O N D I T I O N S
Parameter
Symbol
Input Supply Voltage
RESET Output Voltage
Clamp Diode Forward Current
Operating Ambient Temperature Range:
MC34064
MC33064
(Note 2)
Recommended Operating Conditions
Min.
Typ.
Max.
VIN
VOUT
IF
1
TA
TA
0
-40
Units
6.5
V
V
70
85
°C
°C
6.5
50mA
Note 2. Range over which the device is functional.
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures of 0°C ≤ TA ≤ 70°C for the MC34064 and -40°C ≤ TA ≤ 85°C
for the MC33064. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
Symbol
Test Conditions
MC34064/MC33064
Min. Typ.
Max.
Units
Comparator Section
Threshold Voltage
High State Output
Low State Output
Hysteresis
VT+
VTVH
VIN Increasing — 4V to 5V
VIN Decreasing — 5V to 4V
4.5
4.5
0.01
4.61
4.59
0.02
4.7
4.7
0.05
V
V
V
27
0.02
0.9
1.0
0.4
0.1
60
0.5
1.2
V
V
V
mA
µA
V
390
500
µA
RESET Output Section
Output Low Level Saturation Voltage
IOL
IOH
VF
VIN = 4.0V, IOL = 8.0mA
VIN = 4.0V, IOL = 2.0mA
VIN = 1.0V, IOL = 0.1mA
VIN = VOUT = 4.0V
VIN = VOUT = 5.0V
Pin 1 to pin 2, IF = 10mA
ICC
VIN = 5.0V
VOL
Output Low Level Current
Output Off-State Leakage
Clamp Diode Forward Voltage
10
0.6
Total Device
Supply Current
Copyright © 1999
Rev. 1.3 6/99
3
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
T RANSIENT I MMUNE U NDERVOLTAGE S ENSING C IRCUIT
P
R O D U C T I O N
D
A T A
S
GRAPH / CURVE INDEX
FIGURE INDEX
Characteristic Curves
FIGURE #
H E E T
Application Circuits
FIGURE #
1.
INPUT VOLTAGE and RESET OUTPUT VOLTAGE vs. TIME
15. LOW VOLTAGE MICROPROCESSOR RESET
2.
POWER-UP RESET VOLTAGE
16. SWITCHING THE LOAD OFF WHEN BATTERY REACHES BELOW 4.3V
3.
POWER-DOWN RESET VOLTAGE
17. VOLTAGE MONITOR
4.
RESET OUTPUT VOLTAGE vs. INPUT VOLTAGE
18. MOSFET LOW VOLTAGE GATE DRIVE PROTECTION
5.
THRESHOLD VOLTAGE vs. TEMPERATURE
6.
THRESHOLD HYSTERESIS vs. TEMPERATURE
19. LOW VOLTAGE MICROPROCESSOR RESET with ADDITIONAL
HYSTERESIS
7.
SUPPLY CURRENT vs. INPUT VOLTAGE
20. SOLAR POWERED BATTERY CHARGER
8.
SUPPLY CURRENT vs. TEMPERATURE
9.
LOW LEVEL OUTPUT CURRENT vs TEMPERATURE
10. LOW LEVEL OUTPUT SATURATION VOLTAGE vs. TEMPERATURE
11. LOW LEVEL OUTPUT SATURATION VOLTAGE vs. TEMPERATURE
12. CLAMP DIODE FORWARD VOLTAGE vs. FORWARD CURRENT
13. PROPAGATION DELAY — HIGH to LOW
14. PROPAGATION DELAY — LOW to HIGH
4
Copyright © 1999
Rev. 1.3 6/99
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
U N D E RV O LTA G E S E N S I N G C I R C U I T
P
R O D U C T I O N
D
CHARACTERISTIC
FIGURE 1. — INPUT VOLTAGE and RESET OUTPUT
VOLTAGE vs. TIME
CURVES
2.0
RL = 10k
15
RL = 10kohms
TA = 25 C
1.8
TA = 25 C
Power-Up RESET Voltage - (V)
RESET - (V)
H E E T
FIGURE 2. — POWER-UP RESET VOLTAGE
20
10
5
0
20
VIN - (V)
S
A T A
15
10
5
1.6
1.4
1.2
1.0
VIN
0.8
0.6
RESET
0.4
0.2
0
0
0
.2
.4
.6
.8
1.0 1.2
1.4
1.6
1.8 2.0
0
0.8
0.4
(t) Time - (ms)
1.6
2.0
(t) Time - (ms)
FIGURE 3. — POWER-DOWN RESET VOLTAGE
FIGURE 4. — RESET OUTPUT VOLTAGE vs. INPUT VOLTAGE
2.0
5
(VOUT) RESET Output Voltage - (V)
RL = 10kohms
TA = 25 C
1.8
Power-Down RESET Voltage - (V)
1.2
1.6
1.4
1.2
1.0
VIN
0.8
0.6
0.4
RESET
RL = 10kohms
TA = 25 C
4
3
2
1
0.2
0
0
0
0.4
0.8
1.2
(t) Time - (ms)
Copyright © 1999
Rev. 1.3 6/99
1.6
2.0
4.58
4.59
4.60
4.61
4.62
(VIN) Input Voltage - (V)
5
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
T RANSIENT I MMUNE U NDERVOLTAGE S ENSING C IRCUIT
P
R O D U C T I O N
D
CHARACTERISTIC
FIGURE 5. — THRESHOLD VOLTAGE vs. TEMPERATURE
H E E T
CURVES
FIGURE 6. — THRESHOLD HYSTERESIS vs. TEMPERATURE
4.7
50
VT+ ; VIN increasing 4.5 - 4.7
VT- ; VIN decreasing 4.7 - 4.5
RL = 10kohms
4.66
46
(VH) Threshold Hysteresis - (mV)
4.68
(VT) Threshold Voltage - (V)
S
A T A
4.64
VT+ - High Threshold Voltage
4.62
4.6
4.58
VT- - Low Threshold Voltage
4.56
4.54
4.52
42
38
34
30
26
22
18
14
4.5
-55
-25
0
25
50
75
100
125
10
-55
150
-25
(TJ) Temperature - ( C)
25
50
75
100
125
150
(TJ) Temperature - ( C)
FIGURE 8. — SUPPLY CURRENT vs. TEMPERATURE
FIGURE 7. — SUPPLY CURRENT vs. INPUT VOLTAGE
1000
1000
RL = No Load
TA = 25 C
900
800
(ICC) Supply Current - ( A)
(ICC) Supply Current - ( A)
0
600
400
200
RL = No Load
800
VIN = 10V
700
600
500
VIN = 5V
400
300
200
100
0
0
2
4
6
(VIN) Input Voltage - (V)
6
8
10
0
-55
-25
0
25
50
75
100
125
150
(TJ) Temperature - ( C)
Copyright © 1999
Rev. 1.3 6/99
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
U N D E RV O LTA G E S E N S I N G C I R C U I T
P
R O D U C T I O N
D
CHARACTERISTIC
FIGURE 9. — LOW LEVEL OUTPUT CURRENT
vs. TEMPERATURE
40
35
VIN = VOUT = 4V
25
20
15
10
VIN = VOUT = 1V
0
-55
-25
0
25
50
75
100
125
150
(VOL) Low Level Output Saturation Voltage - (mV)
(IOL) Low Level Output Current - (mA)
45
5
H E E T
CURVES
FIGURE 10. — LOW LEVEL OUTPUT SATURATION VOLTAGE
vs. TEMPERATURE
50
30
S
A T A
400
VIN = 4V
360
320
280
240
200
160
IOL = 8mA
120
80
IOL = 2mA
40
0
-55
-25
0
(TJ) Temperature - ( C)
(VF) Clamp Diode Forward Voltage - (V)
(VOL) Low Level Output Saturation Voltage - (mV)
100
125
150
1.2
VIN = 1V
IOL = 100 A
80
70
60
50
40
30
20
10
RESET = 0V
1.1
-40 C
1
0.9
25 C
0.8
85 C
0.7
0.6
0.5
-25
0
25
50
75
100
(TJ) Temperature - ( C)
Copyright © 1999
Rev. 1.3 6/99
75
FIGURE 12. — CLAMP DIODE FORWARD VOLTAGE
vs. FORWARD CURRENT
100
0
-55
50
(TJ) Temperature - ( C)
FIGURE 11. — LOW LEVEL OUTPUT SATURATION VOLTAGE
vs. TEMPERATURE
90
25
125
150
0
10
20
30
40
50
60
70
80
90 100
(IF) Forward Current - (mA)
7
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
T RANSIENT I MMUNE U NDERVOLTAGE S ENSING C IRCUIT
P
R O D U C T I O N
D
A T A
CHARACTERISTIC
FIGURE 13. — PROPAGATION DELAY — HIGH to LOW
TA = 25 C
10K
5V
4V
5.0
RESET
REF
4.5
5.0
4.5
4.0
4.0
5.0
5.0
3.0
1.0
0
VIN
10K
5V
3.0
4V
RESET
1.0
REF
0
-1.0
-1.0
0
50
100
150
200
250
(t) Time - (ns)
8
CURVES
5.5
VIN
RESET - (V)
RESET - (V)
VIN - (V)
TA = 25 C
H E E T
FIGURE 14. — PROPAGATION DELAY — LOW to HIGH
VIN - (V)
5.5
S
300
350
400
0
.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
(t) Time - ( s)
Copyright © 1999
Rev. 1.3 6/99
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
U N D E RV O LTA G E S E N S I N G C I R C U I T
P
R O D U C T I O N
D
A T A
S
H E E T
T Y P I C A L A P P L I C AT I O N C I R C U I T S
FIGURE 16. — SWITCHING THE LOAD OFF WHEN
BATTERY REACHES BELOW 4.3V
FIGURE 15. — LOW VOLTAGE MICROPROCESSOR RESET
VIN
R
RESET
POWER
SUPPLY
CDLY
MICROPROCESSOR
CIRCUIT
VIN
LOAD
1.2 VREF
RESET
A time delayed reset can be accomplished with the addition of CDLY.
For systems with extremely fast power supply rise times (< 500ns) it
is recommended that the RCDLY time constant be greater than 5.0µs.
VTH(MPU) is the microprocessor reset input threshold.
tDLY = R CDLY In
1.2 VREF
1
VTH(MPU)
1VIN
FIGURE 17. — VOLTAGE MONITOR
FIGURE 18. — MOSFET LOW VOLTAGE GATE DRIVE PROTECTION
VCC
1.0k
RL
270
4.3V
SMP60N03-10L
VIN
VIN
RESET
POWER
SUPPLY
RESET
1.2 VREF
1.2 VREF
Overheating of the logic level power MOSFET due to insufficient gate
voltage can be prevented with the above circuit. When the input signal is
below the 4.6 volt threshold of the MC34064, its output grounds the gate
of the L2 MOSFET.
Copyright © 1999
Rev. 1.3 6/99
9
PRODUCT DATABOOK 1996/1997
MC33064/MC34064
T RANSIENT I MMUNE U NDERVOLTAGE S ENSING C IRCUIT
P
R O D U C T I O N
D
A T A
S
H E E T
T Y P I C A L A P P L I C AT I O N C I R C U I T S
(Cont'd.)
FIGURE 19. — LOW VOLTAGE MICROPROCESSOR RESET
with ADDITIONAL HYSTERESIS
TEST DATA
RH
IIN
VIN
POWER
SUPPLY
RL
RESET
MICROPROCESSOR
CIRCUIT
VH =
4.6 RH
+ 0.02
RL
∆VTH (LOWER) = 340 RH x 10-6
1.2 VREF
Where: RH ≤ 150Ω
RL ≥ 1.5Ω ≤ 10kΩ
Comparator hysteresis can be increased with the addition of resistor RH. The
hysteresis equation has been simplified and does not account for the change of
input current IIN as VCC crosses the comparator threshold. An increase of the
lower threshold ∆VTH (LOWER) will be observed due to IIN which is typically 340µA at
4.59V. The equations are accurate to ±10% with RH less than 150Ω and RL
between 1.5kΩ and 10kΩ.
VH
(mV)
20
51
40
81
71
112
100
164
190
327
276
480
∆VTH
(mV)
0
3.4
6.8
6.8
10
10
16
16
34
34
51
51
RH
(Ω)
0
10
20
20
30
30
47
47
100
100
150
150
RL
(Ω)
0
1.5
4.7
1.5
2.7
1.5
2.7
1.5
2.7
1.5
2.7
1.5
FIGURE 20. — SOLAR POWERED BATTERY CHARGER
VIN
RESET
SOLAR
CELLS
1.2 VREF
PRODUCTION DATA - Information contained in this document is proprietary to LinFinity, and is current as of publication date. This document
may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of
all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.
10
Copyright © 1999
Rev. 1.3 6/99
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