SCY305LFCC20TBG [ONSEMI]
Analog Circuit;
| 型号： | SCY305LFCC20TBG |
| 厂家： | 
ONSEMI |
| 描述： | Analog Circuit |
| 文件： | 总14页 (文件大小：242K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Customer Specific Device from ON Semiconductor
Voltage Detector Series
SCY305
The SCY305 series is a second generation ultra−low current voltage
detectors. These devices are specifically designed for use as reset
controllers in portable microprocessor based systems where extended
battery life is paramount.
WLCSP4
FCC SUFFIX
CASE TBD
The series features a highly accurate undervoltage detector with
hysteresis which prevents erratic system reset operation as the
comparator threshold is crossed.
The SCY305 series has an open drain N−Channel output with an
active low reset output.
The SCY305 device series is available in a WLCSP package with
standard undervoltage thresholds. Additional thresholds that range
from 0.9 V to 4.9 V in 100 mV steps can be manufactured.
MARKING DIAGRAM
A1
XM
X
M
= Specific Device Code
= Month
Features
• Quiescent Current of 1.0 mA Typical
• High UVLO Accuracy of 1.0% at Room Temperature
1.5% Over Room Temperature
PIN CONNECTIONS
OUT
Vin
• Wide Operating Voltage Range of 0.8 V to 10 V
• Open Drain Reset Output
A1
A2
• Active Low Reset Output
• These Devices are Pb−Free and are RoHS Compliant
Typical Applications
B1
B2
• Microprocessor Reset Controller
• Low Battery Detection
• Power Fail Indicator
NC
GND
(Top View)
• Battery Backup Detection
SCY305LFCCxxTxx
Open Drain Output Configuration
ORDERING INFORMATION
See detailed ordering and shipping information on page 13 of
this data sheet.
2
1
Input
Reset Output
This document contains information on
a
product under development. ON Semiconductor
reserves the right to change or discontinue this
product without notice.
V
ref
4
GND
This document, and the information contained herein,
is CONFIDENTIAL AND PROPRIETARY and the
property of Semiconductor Components Industries,
LLC., dba ON Semiconductor. It shall not be used,
published, disclosed or disseminated outside of the
Company, in whole or in part, without the written
permission of ON Semiconductor. Reverse
engineering of any or all of the information contained
herein is strictly prohibited.
This device contains 37 active transistors.
* The representative block diagram depicts active low
reset output ‘L’ suffix devices. The comparator input is
interchanged for the active high output ‘H’ suffix devices.
Figure 1. Representative Block Diagram
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
E 2019, SCILLC. All Rights Reserved.
© Semiconductor Components Industries, LLC, 2019
1
Publication Order Number:
October, 2019 − Rev. P0
SCY305/D
CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
Table 1. MAXIMUM RATINGS (Note 1)
Rating
Symbol
Value
Unit
Input Power Supply Voltage (Pin 2)
V
12
V
V
in
Output Voltage (Pin 1)
V
OUT
−0.3 to 12
N−Channel Open Drain, SCY305
Output Current (Pin 1) (Note 2)
Thermal Resistance, Junction−to−Air
Maximum Junction Temperature
Storage Temperature Range
I
70
TBD
mA
°C/W
°C
OUT
R
q
JA
J
T
+125
T
−55 to +150
°C
stg
LATCHUP
Latchup Performance (Note 3)
I
mA
500
170
Positive
Negative
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per MIL−STD−883, Method 3015.
Machine Model Method 200 V.
2. The maximum package power dissipation limit must not be exceeded.
T
−T
J(max)
R
A
P
D
+
qJA
3. Maximum Ratings per JEDEC standard JESD78.
Table 2. ELECTRICAL CHARACTERISTICS (For all values T = 25°C, unless otherwise noted.)
A
Characteristic
Symbol
Min
Typ
Max
Unit
SCY305 − 2.7
Detector Threshold (Pin 2, V Decreasing)
V
2.673
2.660
0.081
2.700
2.700
0.135
2.727
2.741
0.189
V
in
DET−
Detector Threshold Hysteresis (Pin 2, V Increasing)
V
V
in
HYS
Supply Current (Pin 2)
I
in
mA
−
−
0.9
1.1
2.7
3.3
(V = 2.6 V)
in
(V = 4.7 V)
in
Maximum Operating Voltage (Pin 2)
Minimum Operating Voltage (Pin 2)
(T = −40°C to 85°C)
A
V
−
−
10
V
V
in(max)
V
−
−
0.55
0.65
0.70
0.80
in(min)
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices)
I
mA
OUT
N−Channel Sink Current, SCY305
0.01
1.0
0.05
2.0
−
−
(V
OUT
(V
OUT
= 0.05 V, V = 0.70 V)
in
= 0.50 V, V = 1.5 V)
in
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices)
N−Channel Sink Current, SCY305
I
mA
OUT
6.3
11
−
(V
OUT
= 0.5 V, V = 5.0 V)
in
Propagation Delay Input to Output (Figure 2)
ms
N−Channel Open Drain SCY305 Series
Output Transition, High to Low (Note 4)
Output Transition, Low to High (Note 4)
t
t
−
−
12
−
−
70
pHL
pLH
SCY305 − 2.9
Detector Threshold (Pin 2, V Decreasing)
V
DET−
2.871
2.857
2.900
2.900
2.929
2.944
V
in
4. In the case of CMOS Output Type: The time interval between the rising edge of V input pulse from 0.7 V to (+V
) +2.0 V and output
DET
DD
voltage level becoming to V /2. In the case of N−Channel Open Drain Output Type: Output pin is pulled up with a resistance of 470 kW
DD
to 5.0 V, the time interval between the rising edge of V input pulse from 0.7 V to (+V
) +2.0 V and output voltage level becoming to
DET
DD
2.5 V.
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2
CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
Table 2. ELECTRICAL CHARACTERISTICS (continued) (For all values T = 25°C, unless otherwise noted.)
A
Characteristic
Symbol
Min
Typ
Max
Unit
SCY305 − 2.9
Detector Threshold Hysteresis (Pin 2, V Increasing)
V
HYS
0.087
0.145
0.203
V
in
Supply Current (Pin 2)
I
in
mA
−
−
0.9
1.1
2.9
3.5
(V = 2.8 V)
in
(V = 4.9 V)
in
Maximum Operating Voltage (Pin 2)
Minimum Operating Voltage (Pin 2)
(T = −40°C to 85°C)
A
V
−
−
10
V
V
in(max)
V
−
−
0.55
0.65
0.70
0.80
in(min)
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices)
I
mA
OUT
N−Channel Sink Current, SCY305
0.01
1.0
0.05
2.0
−
−
(V
OUT
(V
OUT
= 0.05 V, V = 0.70 V)
in
= 0.50 V, V = 1.5 V)
in
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices)
N−Channel Sink Current, SCY305
I
mA
OUT
6.3
11
−
(V
OUT
= 0.5 V, V = 5.0 V)
in
Propagation Delay Input to Output (Figure 2)
ms
N−Channel Open Drain SCY305 Series
Output Transition, High to Low (Note 4)
Output Transition, Low to High (Note 4)
t
t
−
−
12
−
−
70
pHL
pLH
SCY305 − 3.0
Detector Threshold (Pin 2, V Decreasing)
V
2.970
2.955
0.09
3.00
3.00
0.15
3.030
3.045
0.21
V
in
DET−
Detector Threshold Hysteresis (Pin 2, V Increasing)
V
V
in
HYS
Supply Current (Pin 2)
I
in
mA
−
−
1.0
1.2
3.0
3.6
(V = 2.87 V)
in
(V = 5.0 V)
in
Maximum Operating Voltage (Pin 2)
Minimum Operating Voltage (Pin 2)
(T = −40°C to 85°C)
A
V
−
−
10
V
V
in(max)
V
−
−
0.55
0.65
0.70
0.80
in(min)
Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices)
I
mA
OUT
N−Channel Sink Current, SCY305
0.01
1.0
0.05
2.0
−
−
(V
OUT
(V
OUT
= 0.05 V, V = 0.70 V)
in
= 0.50 V, V = 1.5 V)
in
Reset Output Current (Pin 1, Active High ‘H’ Suffix Devices)
N−Channel Sink Current, SCY305
I
mA
OUT
6.3
11
−
(V
OUT
= 0.5 V, V = 5.0 V)
in
Propagation Delay Input to Output (Figure 2)
ms
N−Channel Open Drain SCY305 Series
Output Transition, High to Low (Note 4)
Output Transition, Low to High (Note 4)
t
t
−
−
12
−
−
70
pHL
pLH
4. In the case of CMOS Output Type: The time interval between the rising edge of V input pulse from 0.7 V to (+V
) +2.0 V and output
DET
DD
voltage level becoming to V /2. In the case of N−Channel Open Drain Output Type: Output pin is pulled up with a resistance of 470 kW
DD
to 5.0 V, the time interval between the rising edge of V input pulse from 0.7 V to (+V
) +2.0 V and output voltage level becoming to
DET
DD
2.5 V.
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3
CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
V
DET+
+ 2
Input Voltage, Pin 2
0.7
0 V
5 V
Reset Output Voltage, Pin 1
2.5 V
SCY305L
Open Drain
Output
0.5 V
0 V
t
t
pHL
pLH
The SCY305 series is measured with a 10 pF capacitive load. The SCY305 has an additional 470 k pullup resistor connected from
the reset output to +5.0 V. The reset output voltage waveforms are shown for the active low ‘L’ devices. The upper detector thresh-
old, V
is the sum of the lower detector threshold, V
plus the input hysteresis, V
.
DET+
DET−
HYS
Figure 2. Propagation Delay Measurement Conditions
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4
CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
Table 3. SCY305 SERIES ELECTRICAL CHARACTERISTIC TABLE FOR 0.9 − 4.9 V, TA = 255C
N−Channel
Sink Current
Supply Current
Detector Threshold
Hysteresis
V
in
Low
V
in
High
V
in
Low
V High
in
Detector Threshold
I
in
I
in
I
I
OUT
OUT
(mA)
(mA)
(mA)
(mA)
(Note 5)
(Note 6)
(Note 7)
(Note 8)
V
DET−
(V)
V
HYS
(V)
Min
Typ
Max
Min
Typ
Max
Typ
Typ
Typ
Typ
Part Number
SCY305LFCC09TBG
SCY305LFCC15TBG
SCY305LFCC16TBG
SCY305LFCC17TBG
SCY305LFCC18TBG
SCY305LFCC20TBG
SCY305LFCC22TBG
SCY305LFCC23TBG
SCY305LFCC24TBG
SCY305LFCC25TBG
SCY305LFCC26TBG
SCY305LFCC27TBG
SCY305LFCC28TBG
SCY305LFCC29TBG
SCY305LFCC30TBG
SCY305LFCC31TBG
SCY305LFCC32TBG
SCY305LFCC33TBG
SCY305LFCC34TBG
SCY305LFCC35TBG
SCY305LFCC36TBG
SCY305LFCC37TBG
SCY305LFCC40TBG
SCY305LFCC44TBG
SCY305LFCC45TBG
SCY305LFCC47TBG
SCY305LFCC49TBG
0.891
1.485
1.584
1.683
1.782
1.980
2.178
2.277
2.376
2.475
2.574
2.673
2.772
2.871
2.970
3.069
3.168
3.267
3.366
3.465
3.564
3.663
3.960
4.356
4.455
4.653
4.851
0.9
1.5
1.6
1.7
1.8
2.0
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
4.0
4.4
4.5
4.7
4.9
0.909
1.515
1.616
1.717
1.818
2.020
2.222
2.323
2.424
2.525
2.626
2.727
2.828
2.929
3.030
3.131
3.232
3.333
3.434
3.535
3.636
3.737
4.040
4.444
4.545
4.747
4.949
0.027
0.045
0.048
0.051
0.054
0.060
0.066
0.069
0.072
0.075
0.078
0.081
0.084
0.087
0.090
0.093
0.096
0.099
0.102
0.105
0.108
0.111
0.120
0.132
0.135
0.141
0.147
0.045
0.075
0.080
0.085
0.090
0.100
0.110
0.115
0.120
0.125
0.130
0.135
0.140
0.145
0.150
0.155
0.160
0.165
0.170
0.175
0.180
0.185
0.200
0.220
0.225
0.235
0.245
0.063
0.105
0.112
0.119
0.126
0.140
0.154
0.161
0.168
0.175
0.182
0.189
0.196
0.203
0.210
0.217
0.224
0.231
0.238
0.245
0.252
0.259
0.280
0.308
0.315
0.329
0.343
0.8
0.9
0.05
0.5
2.0
0.9
1.1
1.0
1.2
1.1
1.3
5. Condition 1: 0.9 − 2.9 V, V = V
− 0.10 V; 3.0 − 3.9 V, V = V
− 0.13 V; 4.0 − 4.9 V, V = V
− 0.16 V
in
DET−
in
DET−
in
DET−
6. Condition 2: 0.9 − 4.9 V, V = V
+ 2.0 V
in
DET−
7. Condition 3: 0.9 − 4.9 V, V = 0.7 V, V
= 0.05 V, Active Low ‘L’ Suffix Devices
in
OUT
8. Condition 4: 0.9 − 1.0 V, V = 0.85 V, V
= 0.5 V; 1.1 − 1.5 V, V = 1.0 V, V
= 0.5 V; 1.6 − 4.9 V, V = 1.5 V, V
= 0.5 V,
in
OUT
in
OUT
in
OUT
Active Low ‘L’ Suffix Devices
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CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
3.00
2.95
2.90
2.85
2.80
2.75
2.70
2.65
2.60
0.98
0.96
V
DET+
0.94
0.92
0.90
V
V
DET+
V
DET−
DET−
0.88
0.86
−50
0
75
−50
0
75
−25
25
50
100
−25
25
50
100
T , AMBIENT TEMPERATURE (°C)
A
T , AMBIENT TEMPERATURE (°C)
A
Figure 3. SCY305 Series 0.9 V
Figure 4. SCY305 Series 2.7 V
Detector Threshold Voltage vs. Temperature
Detector Threshold Voltage vs. Temperature
1.0
0.8
0.6
0.4
4.9
4.8
4.7
4.6
4.5
V
V
DET+
DET−
T = −30°C
A
T = 25°C
T = 85°C
A
A
0.2
0
4.4
4.3
−50
0
75
−25
25
50
100
0
0.2
0.4
0.6
0.8
1.0
V , INPUT VOLTAGE (V)
in
T , AMBIENT TEMPERATURE (°C)
A
Figure 6. SCY305L Series 0.9 V
Figure 5. SCY305 Series 4.5 V
Reset Output Voltage vs. Input Voltage
Detector Threshold Voltage vs. Temperature
7.0
3.0
2.5
2.0
1.5
6.0
5.0
4.0
3.0
2.0
1.0
0.5
0
T = −30°C
A
T = −30°C
A
T = 85°C
A
A
T = 25°C
A
T = 25°C
1.0
0
T = 85°C
A
0
2.0
4.0
5.0
6.0
1.0
3.0
0
0.5
1.5
2.5
3.0
1.0
2.0
V , INPUT VOLTAGE (V)
in
V , INPUT VOLTAGE (V)
in
Figure 8. SCY305L Series 4.5 V
Figure 7. SCY305L Series 2.7 V
Reset Output Voltage vs. Input Voltage
Reset Output Voltage vs. Input Voltage
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CONFIDENTIAL AND PROPRIETARY
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SCY305
3.0
1.2
T = 25°C
A
1.0
0.8
0.6
0.4
2.5
2.0
1.5
1.0
0.5
0
V
in
= 0.85 V
V
in
= 0.7 V
T = −30°C
A
T = 25°C
A
0.2
0
T = 85°C
A
0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.4
, OUTPUT VOLTAGE (V)
1.0
0.2
V
0.6
0.8
V , INPUT VOLTAGE (V)
in
OUT
Figure 9. SCY305H Series 2.7 V
Figure 10. SCY305L Series 0.9 V
Reset Output Voltage vs. Input Voltage
Reset Output Sink Current vs. Output Voltage
16
14
35
30
25
20
15
10
5.0
0
T = 25°C
A
T = 25°C
A
V
V
V
= 4.0 V
= 3.5 V
= 3.0 V
in
in
in
V
= 2.5 V
= 2.0V
in
12
10
8.0
6.0
4.0
V
in
V
= 2.5 V
in
V
= 2.0 V
in
V
in
= 1.5 V
1.5
V
in
= 1.5 V
2.0
0
0
1.0
V
2.5
, OUTPUT VOLTAGE (V)
0
1.0
2.5
0.5
1.5
2.0
3.0
3.5
4.0
0.5
2.0
V
OUT
, OUTPUT VOLTAGE (V)
OUT
Figure 11. SCY305L Series 2.7 V
Reset Output Sink Current vs. Output Voltage
Figure 12. SCY305L Series 4.5 V
Reset Output Sink Current vs. Output Voltage
2.0
T = 25°C
A
1.5
1.0
0.5
0
0
4.0
V , INPUT VOLTAGE (V)
8.0
10
2.0
6.0
in
Figure 13. SCY305 Series 0.9 V
Input Current vs. Input Voltage
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CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
2
2.0
T = 25°C
A
T = 25°C
A
1.5
1.0
1.5
1.0
0.5
0
0.5
0
0
4.0
6.0
10
2.0
8.0
0
4.0
6.0
2.0
8.0
10
V , INPUT VOLTAGE (V)
in
V , INPUT VOLTAGE (V)
in
Figure 14. SCY305 Series 2.7 V
Input Current vs. Input Voltage
Figure 15. SCY305 Series 4.5 V
Input Current vs. Input Voltage
7.0
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
6.0
5.0
4.0
3.0
2.0
1.0
0
T = −30°C
A
T = 25°C
A
T = 85°C
A
T = 85°C
A
T = 25°C
A
T = −30°C
A
0
1.0
V , INPUT VOLTAGE (V)
2.5
0.5
1.5
2.0
3.0
0
0.4
V , INPUT VOLTAGE (V)
1.0
0.2
0.6
0.8
in
in
Figure 16. SCY305L Series 0.9 V
Figure 17. SCY305L Series 2.7 V
Reset Output Sink Current vs. Input Voltage
Reset Output Sink Current vs. Input Voltage
90
12
10
8.0
6.0
4.0
2.0
0
80
70
60
50
40
30
T = −30°C
A
V
out
= V − 2.1 V
in
T = 25°C
A
= V − 1.5 V
in
= V − 1.0 V
in
T = 85°C
A
= V − 0.5 V
in
20
10
0
0
2.0
4.0
6.0
8.0
10
0
2.0
V , INPUT VOLTAGE (V)
5.0
1.0
3.0
4.0
V , INPUT VOLTAGE (V)
in
in
Figure 18. SCY305L Series 4.5 V
Reset Output Sink Current vs. Input Voltage
Figure 19. SCY305H Series 2.7 V
Reset Output Sink Current vs. Input Voltage
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CONFIDENTIAL AND PROPRIETARY
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SCY305
OPERATING DESCRIPTION
The SCY305 series devices are second generation
ultra−low current voltage detectors. Figures 20 and 21 show
a timing diagram and a typical application. Initially consider
for active high devices. After completion of the power
interruption, V will again return to its nominal level and
in
become greater than the V
. The voltage detector has
DET+
that input voltage V is at a nominal level and it is greater
built−in hysteresis to prevent erratic reset operation as the
comparator threshold is crossed.
in
than the voltage detector upper threshold (V
), and the
DET+
reset output (Pin 1) will be in the high state for active low
devices, or in the low state for active high devices. If there
Although these device series are specifically designed for
use as reset controllers in portable microprocessor based
systems, they offer a cost−effective solution in numerous
applications where precise voltage monitoring is required.
Figure 21 through Figure 27 shows various application
examples.
is a power interruption and V becomes significantly
in
deficient, it will fall below the lower detector threshold
(V ). This sequence of events causes the Reset output to
DET−
be in the low state for active low devices, or in the high state
“L” in Part Name
“H” in Part Name
Function: active Low Reset Output
Input < Vdet−, Reset Output is Low
Input > Vdet+, Reset Output is High
Function: active High Reset Output
Input < Vdet−, Reset Output is High
Input > Vdet+, Reset Output is Low
V
in
Input Voltage, Pin 2
V
+
DET
V
DET−
V
in
Reset Output (Active Low), Pin 1
V
+
DET
V
DET−
0 V
V
in
Reset Output (Active High), Pin 1
V
+
DET
V
DET−
0 V
Figure 20. Timing Waveforms
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9
CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
APPLICATION CIRCUIT INFORMATION
V
DD
V
DD
2
Input
1
SCY305
Series
Microprocessor
Reset
Reset Output
4
GND
GND
Figure 21. Microprocessor Reset Circuit
2.85 V
2.70 V
V
in
< 2.7 ON
2
Input
1
SCY305
LFCC27TBG
To Additional Circuitry
Reset Output
V
in
> 2.835 ON
4
GND
Figure 22. Battery Charge Indicator
V
supply
5.0 V
Input
2
1
SCY305
LFCC45TBG
Reset Output
4
2
GND
Input
3.3 V
1
SCY305
LFCC30TBG
Low state output if either
power supply is below the
respective undervoltage de-
tector threshold but greater
than 1.0 V.
Reset Output
4
GND
Figure 23. Dual Power Supply Undervoltage Supervision
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10
CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
V
DD
R
H
V
DD
Input
2
R
L
1
SCY305
Microprocessor
LFCC27TBG
Reset
Reset Output
GND
4
GND
Figure 24. Microprocessor Reset Circuit with Additional Hysteresis
Comparator hysteresis can be increased with the addition of
Test Data
resistor R . The hysteresis equations have been simplified and
H
V
th
Decreasing
(mV)
V
th
Increasing
(mV)
V
(mV)
R
(W)
R
L
(kW)
do not account for the change of input current I as V crosses
HYS
H
in
in
the comparator threshold. The internal resistance, R is simply
in
calculated using I = 0.26 mA at 2.6 V.
in
2.70
2.70
2.70
2.70
2.70
2.70
2.70
2.70
2.70
2.70
2.84
2.87
2.88
2.91
2.90
2.94
2.98
2.70
3.04
3.15
0.135
0.17
0.19
0.21
0.20
0.24
0.28
0.27
0.34
0.35
0
−
10
V Decreasing:
in
100
100
100
220
220
220
470
470
470
6.8
4.3
10
6.8
4.3
10
RH
Rin
ǒ
Ǔ
+ ǒ Ǔ
Vth
) 1 VDET*
V Increasing:
in
RH
6.8
4.3
ǒ
Ǔ
+ ǒ Ǔ V
Vth
) 1
DET* ) VHYS
Rin ø RL
V
HYS
= V Increasing − V Decreasing
in
in
5.0 V
100 k
Test Data
(kHz)
C (mF)
0.01
0.1
f
I
Q
(mA)
OSC
C
2
Input
2590
21.77
21.97
22.07
82 k
1
490
52
SCY302
LFCC27TBG
Reset Output
1.0
GND
4
Figure 25. Simple Clock Oscillator
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11
CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
V
supply
This circuit monitors the current at the load. As
current flows through the load, a voltage drop with
Load
respect to ground appears across R
where
sense
V
DD
V
sense
= I
load
* R The following conditions apply:
sense.
If:
I
Then:
Reset Output = 0 V
Reset Output = V
DD
Input
2
t V
w (V
/R
Load
DET− sense
R
sense
50 k
I
+V
DET−
)/R
Load
HYS
sense
1
SCY305
LFCC09TBG
Microcontroller
Reset Output
GND
GND
4
Figure 26. Microcontroller Systems Load Sensing
V
supply
2
Input
1
SCY305
LFCC45TBG
Reset
Output
4
GND
Input
2
1
SCY305
LFCC27TBG
Reset
Output
GND
4
V
in
= 1.0 V to 10 V
2
Input
1
SCY305
LFCC18TBG
Reset
Output
4
GND
A simple voltage monitor can be constructed by connecting several voltage detectors as shown above. Each LED will
sequentially turn on when the respective voltage detector threshold (V +V ) is exceeded. Note that detector
DET−
HYS
thresholds (V ) that range from 0.9 V to 4.9 V in 100 mV steps can be manufactured.
DET−
Figure 27. LED Bar Graph
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12
CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
ORDERING INFORMATION
Threshold
Voltage
Output
Type
†
Device
Reset
Marking
Package
Shipping
T&R Orientation
SCY305LFCC32TBG
3.2
Open Drain
Active
Low
TBD
WLCSP
3000 / Tape &
Reel
Pin 1 Upper Right
Quadrant toward
sprocket hole
NOTE: The ordering information lists standard undervoltage thresholds with active low outputs. Additional active low threshold devices, ranging
from 0.9 V to 4.9 V in 100 mV increments can be manufactured. Contact your ON Semiconductor representative for availability. The
electrical characteristics of these additional devices are shown in Tables 2 and 3.
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
PACKAGE DIMENSIONS
WLCSP4
CASE TBD
ISSUE O
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13
CONFIDENTIAL AND PROPRIETARY
NOT FOR PUBLIC RELEASE
SCY305
WLCSP Tape and Reel Orientation
Pitch mm
(Dimension P1)
(inch)
Reel Size
Devices Per Reel &
Min Order Quantity
(mm)
178
(in)
Package
Tape Width mm
T&R Suffix
WLCSP 4−Bump
0.69x0.82mm
8
2.0+−0.05 (0.079+−0.002)
7
3000
TB
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