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MC33164のメーカーはMotorola Semiconductorsです、この部品の機能は「MICROPOWER UNDERVOLTAGE SENSING CIRCUITS」です。 |
部品番号 | MC33164 |
| |
部品説明 | MICROPOWER UNDERVOLTAGE SENSING CIRCUITS | ||
メーカ | Motorola Semiconductors | ||
ロゴ | |||
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Order this document by MC34164/D
Micropower Undervoltage
Sensing Circuits
The MC34164 series are undervoltage sensing circuits specifically
designed for use as reset controllers in portable microprocessor based
systems where extended battery life is required. These devices offer the
designer an economical solution for low voltage detection with a single
external resistor. The MC34164 series features a bandgap reference, a
comparator with precise thresholds and built–in hysteresis to prevent erratic
reset operation, an open collector reset output capable of sinking in excess
of 6.0 mA, and guaranteed operation down to 1.0 V input with extremely low
standby current. These devices are packaged in 3–pin TO–226AA, 8–pin
SO–8 and Micro–8 surface mount packages.
Applications include direct monitoring of the 3.0 or 5.0 V MPU/logic power
supply used in appliance, automotive, consumer, and industrial equipment.
• Temperature Compensated Reference
• Monitors 3.0 V (MC34164–3) or 5.0 V (MC34164–5) Power Supplies
• Precise Comparator Thresholds Guaranteed Over Temperature
• Comparator Hysteresis Prevents Erratic Reset
• Reset Output Capable of Sinking in Excess of 6.0 mA
• Internal Clamp Diode for Discharging Delay Capacitor
• Guaranteed Reset Operation With 1.0 V Input
• Extremely Low Standby Current: As Low as 9.0 µA
• Economical TO–226AA, SO–8 and Micro–8 Surface Mount Packages
MC34164
MC33164
MICROPOWER
UNDERVOLTAGE
SENSING CIRCUITS
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 29
(TO–226AA)
123
Pin 1. Reset
2. Input
3. Ground
D SUFFIX
PLASTIC PACKAGE 8
CASE 751
(SO–8)
1
DM SUFFIX
PLASTIC PACKAGE
CASE 846A
(Micro–8)
8
1
Representative Block Diagram
Input 2 (2)
Reset
1 (1)
Reset 1
Input 2
N.C. 3
Ground 4
8 N.C.
7 N.C.
6 N.C.
5 N.C.
(Top View)
1.2 Vref
Gnd 3 (4)
=
Sink Only
Positive True Logic
Pin numbers adjacent to terminals are for the 3–pin TO–226AA package.
Pin numbers in parenthesis are for the 8–lead packages.
This device contains 28 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC34164D–3
MC34164D–5
MC34164DM–3
MC34164DM–5
MC34164P–3
MC34164P–5
MC33164D–3
MC33164D–5
MC33164DM–3
MC33164DM–5
MC33164P–3
MC33164P–5
TA = 0° to +70°C
TA = –40° to +125°C
SO–8
Micro–8
TO–226AA
SO–8
Micro–8
TO–226AA
© Motorola, Inc. 1996
Rev 1
1
1 Page MC34164 MC33164
MC34164–5, MC33164–5 SERIES
ELECTRICAL CHARACTERISTICS (For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range
that applies [Notes 2 & 3], unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max Unit
COMPARATOR
Threshold Voltage
High State Output (Vin Increasing)
Low State Output (Vin Decreasing)
Hysteresis (ISink = 100 µA)
VIH 4.15 4.33
VIL 4.15 4.27
VH 0.02 0.09
RESET OUTPUT
Output Sink Saturation
(Vin = 4.0 V, ISink = 1.0 mA)
(Vin = 1.0 V, ISink = 0.25 mA)
VOL
– 0.14
– 0.1
Output Sink Current (Vin, Reset = 4.0 V)
Output Off–State Leakage
(Vin, Reset = 5.0 V)
(Vin, Reset = 10 V)
ISink
IR(leak)
7.0
–
–
20
0.02
0.02
Clamp Diode Forward Voltage, Pin 1 to 2 (IF = 5.0 mA)
VF 0.6 0.9
TOTAL DEVICE
Operating Input Voltage Range
Vin 1.0 to 10
–
Quiescent Input Current
Vin = 5.0 V
Vin = 10 V
Iin
– 12
– 32
NOTES: 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
3. Tlow = 0°C for MC34164
Thigh = + 70°C for MC34164
3. Tlow = – 40°C for MC33164 Thigh = + 85°C for MC33164
4.45
4.45
–
0.4
0.3
50
0.5
2.0
1.2
–
20
50
V
V
mA
µA
V
V
µA
Figure 1. MC3X164–3 Reset Output
Voltage versus Input Voltage
10
8.0
RL = 82 k to Vin
TA = 25°C
6.0
4.0
2.0
0
0
2.0 4.0
6.0 8.0
10
Vin, INPUT VOLTAGE (V)
Figure 2. MC3X164–5 Reset Output
Voltage versus Input Voltage
10
8.0
RL = 82 k to Vin
TA = 25°C
6.0
4.0
2.0
0
0 2.0 4.0 6.0 8.0 10
Vin, INPUT VOLTAGE (V)
MOTOROLA ANALOG IC DEVICE DATA
3
3Pages MC34164 MC33164
Figure 14. Low Voltage Microprocessor Reset With Additional Hysteresis
(MC3X164–5 Shown)
Power
Supply
RH
Iin 2 (2) Vin
1.2 Vref
MC3X164–5 3 (4)
RL
1 (1) Reset
Microprocessor
Circuit
VH ≈
4.3 RH
RL
+ 0.06
∆Vth(lower) ≈ 10 RH x 10 – 6
where: RH ≤ 1.0 kΩ
43 kΩ ≥ RL ≥ 4.3 kΩ
VH
(mV)
60
103
123
160
155
199
280
262
306
357
421
530
Test Data
∆Vth
(mV)
RH
(Ω)
00
1.0 100
1.0 100
1.0 100
2.2 220
2.2 220
2.2 220
4.7 470
4.7 470
4.7 470
4.7 470
4.7 470
RL
(kΩ)
43
10
6.8
4.3
10
6.8
4.3
10
8.2
6.8
5.6
4.3
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 Vin crosses the comparator threshold (Figure 8). An increase of the lower threshold ∆Vth(lower) will be observed due to Iin which is typically 10 µA at 4.3 V. The
equations are accurate to ±10% with RH less than 1.0 kΩ and RL between 4.3 kΩ and 43 kΩ.
Power
Supply
Figure 15. Voltage Monitor
1.0 k
2 (2)
1 (1)
1.2 Vref
3 (4)
Figure 16. Solar Powered Battery Charger
2 (2)
1 (1)
1.2 Vref
3 (4)
Solar
Cells
Figure 17. MOSFET Low Voltage Gate Drive Protection Using the MC3X164–5
VCC
RL
270 MTP3055EL
4.3V
2 (2)
1.2 Vref
1 (1)
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 4.3 V threshold of the MC3X164–5, its
output grounds the gate of the L2 MOSFET.
3 (4) MC3X164–5
6 MOTOROLA ANALOG IC DEVICE DATA
6 Page | |||
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