ROHM BD4719G, BD4720G, BD4721G, BD4722G, BD4723G Schematic [ru]
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TSZ02201-0R7R0G300020-1-2
© 2016 ROHM Co., Ltd. All rights reserved.
21.Jun.2016 Rev.007
TSZ22111・14・001
www.rohm.com
PIN No.
Symbol
Function
1
N.C.
Unconnected Terminal
2
SUB
Substrate*
3
GND
GND 4 VOUT
Reset Output
5
VDD
Power Supply Voltage
GND
BD47xx series
RESET
GND
VOUT
VDD
V
DD
CPU
Micro-controller
CL
RL
N.C.
SUB
GND
VOUT
V
Lot. No
Marking
Datashee
t
Voltage Detector IC Series
Bipolar
Voltage Detector ICs
BD47xx series
●General Description
The BD47xx series is a Voltage Detector IC,
developed to prevent system errors at transient state,
when the power of CPU or logic circuit switches
ON/OFF or in cases of momentary shut down. These
ICs consist of three terminals (power supply, GND and
reset output) to detect power supply voltages and
outputs reset signals of various systems. These ICs
are ultra-compact and have low current consumption,
making them ideal for portable products.
●Features
High accuracy detection
Low current consumption
Very small package
Open collector “L” reset output
Package SSOP5 is similar to SOT-23-5 (JEDEC)
●Typical Application Circuit
●Connection Diagram
SSOP5
TOP VIEW
●Key Specifications
Detection voltage range: 1.9V to 4.6V (Typ.)
0.1V steps
High accuracy detection voltage: ±1%
Low current consumption: 1.6µA (Typ.)
Operating temperature range: -40°C to +75°C
●Package
SSOP5 2.90mm x 2.80mm x 1.25mm
●Applications
Circuits using microcontrollers or logic circuits that require
a reset.
●Pin Descriptions
*Substrate Pin should be connected with GND
○Product structure：Silicon monolithic integrated circuit ○This product is not designed for protection against radioactive rays
.
1/10
BD47xx series
TSZ02201-0R7R0G300020-1-2
© 2016 ROHM Co., Ltd. All rights reserved.
21.Jun.2016 Rev.007
www.rohm.com
TSZ22111・15・001
Marking
Detection
Voltage
Part Number
Marking
Detection
Voltage
Part Number
Marking
Detection
Voltage
Part Number
B2
4.6V
BD4746
BR
3.6V
BD4736
BH
2.6V
BD4726
B1
4.5V
BD4745
BQ
3.5V
BD4735
BG
2.5V
BD4725
BZ
4.4V
BD4744
BP
3.4V
BD4734
BF
2.4V
BD4724
BY
4.3V
BD4743
B4
3.3V
BD4733
BE
2.3V
BD4723
BX
4.2V
BD4742
BN
3.2V
BD4732
BD
2.2V
BD4722
BW
4.1V
BD4741
BM
3.1V
BD4731
BC
2.1V
BD4721
BV
4.0V
BD4740
BL
3.0V
BD4730
BB
2.0V
BD4720
BU
3.9V
BD4739
BK
2.9V
BD4729
BA
1.9V
BD4719
BT
3.8V
BD4738
BJ
2.8V
BD4728
BS
3.7V
BD4737
B3
2.7V
BD4727
(SOT-23-5)
B D 4 7 x x G - T R
Part Reset Voltage Value Package Packaging and
Number 19 : 1.9V G : SSOP5 forming specification
0.1V step
TR : Embossed tape
46 : 4.6V and reel
●Ordering Information
●Lineup
2/10
BD47xx series
TSZ02201-0R7R0G300020-1-2
© 2016 ROHM Co., Ltd. All rights reserved.
21.Jun.2016 Rev.007
www.rohm.com
TSZ22111・15・001
Parameter
Symbol
Limit
Unit
Power Supply Voltage
VDD
-0.3 to +10
V
Output Voltage
VOUT
-0.3 to +10
V
Output Current
Io
60
mA
Power Dissipation
*1 *2
Pd
540
mW
Operation Temperature Range
Topt
-40 to +75
°C
Ambient Storage Temperature
Tstg
-55 to +125
°C
Parameter
Symbol
Limit
Unit
Min.
Typ.
Max.
Detection Voltage
VDET
VDET (T)
×0.99
VDET(T)
VDET(T)
×1.01
V
Ta=+25°C
2.475
2.5
2.525
Ta =-40°C to 75°C
2.418
-
2.584
Ta=+25°C
2.970
3.0
3.030
Ta =-40°C to 75°C
2.901
-
3.100
VDET=3.3V
Ta=+25°C
3.267
3.3
3.333
Ta =-40°C to 75°C
3.191
-
3.410
VDET=4.2V
Ta=+25°C
4.158
4.2
4.242
Ta=-40°C to 75°C
4.061
-
4.341
Temperature Coefficient
Of Detection Voltage
VDET/∆T
RL=4.7kΩTa=-20 to+75°C Designed Guarantee
-
±0.01
-
%/°C
Detection Hysteresis Voltage
∆VDET
RL=4.7kΩ, VDD=LHL
30
50
100
mV
Transfer Delay Time ”H”
t
PLH
CL=100pF，RL=4.7kΩ *1
-
20
50
µs
Transfer Delay Time ”L”
t
PHL
CL=100pF，RL=4.7kΩ *2
-
60
120
µs
Reset Output Voltage ”L”
VOL
VDD=VDET(min.)-0.05V, RL=4.7kΩ
-
0.1
0.4
V
Circuit Current ON
Icc1
VDD=VDET(min.)-0.05V, RL=∞
-
1.5
3.0
µA
Circuit Current OFF
Icc2
VDD=VDET(typ.)/0.85V, RL=∞
-
1.6
3.2
µA
Operating Voltage Range
V
OPL
RL=4.7kΩ，VOL≤0.4V
-
0.65
0.85
V
Output Leak Current
I
leak
VDD=V
OUT
=10V
- - 0.1
µA
Reset Output Current ”L”
IOL
Vo=0.4V, VDD=VDET(min.)-0.05V
3.0
15.0
-
mA
●Absolute maximum ratings
*1 Reduced by 5.4mW/°C when used over 25°C.
*2 When mounted on ROHM standard circuit board (70mm×70mm×1.6mm, glass epoxy board).
●Electrical characteristics (Unless Otherwise Specified Ta=25°C)
Condition
VDD=HL RL=4.7kΩ
VDET=2.5V
VDET=3.0V
VDET(T):Standard Detection Voltage(1.9V to 4.6V, 0.1V step）
RＬ:Pull-up resistor to be connected between VOUT and power supply.
CL:Capacitor to be connected between VOUT and GND.
*1 tPLH:VDD=(VDET(typ.)-0.4V)(VDET(typ.)+0.4V)
*2 tPHL:VDD=(VDET(typ.)+0.4V)(VDET(typ.)-0.4V)
Design Guarantee. (Outgoing inspection is not done on all products)
3/10
BD47xx series
TSZ02201-0R7R0G300020-1-2
© 2016 ROHM Co., Ltd. All rights reserved.
21.Jun.2016 Rev.007
www.rohm.com
TSZ22111・15・001
Fig.1 BD47xx series
V
OUT
V
DD
GND
5 4
3
●Block Diagram
Vref
4/10
BD47xx series
TSZ02201-0R7R0G300020-1-2
© 2016 ROHM Co., Ltd. All rights reserved.
21.Jun.2016 Rev.007
www.rohm.com
TSZ22111・15・001
Fig.2 Circuit Current
0
1
2
3
4
5
6
7
8
9
10
0 1 2 3 4 5 6 7 8 9 10
VDD SUPPLY VOLTAGE ：VDD[V]
CIRCUIT CURRENT
：
I
CC
[μA]
【BD4729G】
Icc1=1.34μA
0
100
200
300
400
500
600
700
800
0 5 10 15 20 25 30
OUTPUT VOLTAGE ： VOUT[mV]
"LOW" OUTPUT CURRENT
：
I
OL
[mA]
【
BD4729G
】
IOL=12.194mA at Vo=400mV
Fig.3 “Low” Output Current
Fig.4 I/O Characteristics
0
1
2
3
4
5
6
0 1 2 3 4 5 6
VDD SUPPLY VOLTAGE ：VDD[V]
OUTPUT VOLTAGE
：
V
OUT
[V]
【
BD4729G
】
V
DET
=2.95V
⊿V
DET
=50mV
V
DET
=2.90V
0
100
200
300
400
500
600
700
800
900
1000
0 0.5 1 1.5 2 2.5
VDD SUPPLY VOLTAGE ： VDD[V]
OUTPUT VOLTAGE
：
V
OUT
[mV]
【BD4729G】
VOPL=0.675V
Fig.5 Operating Limit Voltage
【BD4729】
【BD4729】
【BD4729】
【BD4729】
●Typical Performance Curves
5/10
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