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ROHM Semiconductor |
Datasheet
LDO Regulators with Watch-Dog Timer
500mA Output LDO Regulators
with Voltage Detector and Watchdog Timer
BD3020HFP-M BD3021HFP-M
General Description
BD3020HFP-M BD3021HFP-M is a regulator IC with
integrated WDT (Watch Dog Timer), high output voltage
accuracy ±2.0 % and 80 µA (Typ) low circuit current
consumption. These are supports usage of low ESR ceramic
capacitor for output stability. The reset detection voltage can
be adjusted by connecting resistors on the Vs terminal
(BD3020HFP-M). They can be a stable power supply for any
applications while detecting malfunction of microcontrollers.
Features
Integrated WDT Reset Circuit
[BD3020HFP-M]: Adjustable Detection Voltage
through Vs pin
[BD3021HFP-M]: WDT Can be Switched ON / OFF
by Using INH Pin
Low saturation voltage by using PMOS output transistor
VCC Max Voltage: 50 V
Integrated Over Current Protection and
Thermal Shut Down
HRP7 package
Key specification
Low Circuit Current:
Output Voltage:
Output Current:
High Output Voltage Accuracy:
Low ESR ceramic capacitor
can be used as output capacitor
80 μA (Typ)
5.0 V (Typ)
500 mA
±2 %
Package
W (Typ) × D (Typ) × H (Max)
HRP7 9.395 mm × 10.540 mm × 2.005 mm
Figure 1. Package Outlook
Applications
Automotive (body, audio system, navigation system, etc.)
Typical Application Circuits
BD3020HFP-M
BD3021HFP-M
Figure 2. Typical Application Circuits
○Product structure:Silicon monolithic integrated circuit
w. ww.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
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TSZ02201-0G1G0AN00010-1-2
20.Apr.2015 Rev.002
BD3020HFP-M BD3021HFP-M
Ordering Information
B D302XHF
P
- MTR
Datasheet
Part number
3020
3021
Package
HFP: HRP7
Taping
TR: reel-wound embossed tamping
Pin Configuration
(TOP VIEW)
FIN
1 234 567
Figure 3. Pin Configuration
Block Diagram
<BD3020HFP-M>
Pin Description
Pin No.
Pin Name
Function
1 CLK Clock Input from Microcontroller
2
Vs
(BD3020HFP-M)
INH
(BD3021HFP-M)
Reset Detection Voltage Set Pin
WDT ON/OFF Function Pin
3 VCC
Power Supply Pin
4 GND
GND
5 VOUT
Voltage Output Pin
6 RESET
Reset Output Pin
External Capacitance for Reset
7 CT Output Delay Time, WDT Monitor
Time Setting Connection Pin
Fin GND
GND
<BD3021HFP-M>
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
Figure 4. Block Diagrams
2/24
TSZ02201-0G1G0AN00010-1-2
20.Apr.2015 Rev.002
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