R5110S Series
36V System Power Supply with Watchdog Timer for Automotive Applications
NO.EC-326-140213
OUTLINE
R5110S is the system power supply and supervisor IC based on the high-voltage CMOS process technology,
and has high accuracy and ultra low supply current voltage.
R5110S consists of a voltage regulator (VR), a voltage detector (VD), and a normal / window type of watchdog
timer (WDT) in a chip, and can provide three functions of the system power supply, the supply voltage supervisor,
and the supervision of system’s misoperation.
Voltage Regulator allows the output current of 500mA. And, VR has the inrush current protection circuit for
rising pulse (Typ.400mA or less).
Voltage Detector outputs a reset signal when a reduction of supply voltage (SENSE / V
OUT
) is detected, and the
reset signal is used as system reset. The detection voltage is internally fixed in an IC. And, the delay time is
adjustable with an external capacitor because VD has the built-in release delay circuit (the power-on reset circuit).
When the supply voltage is higher than the release output voltage, VD maintains the reset state during the delay
time. The output type of RESETB and D
OUT
are Nch open-drain. In addition, R5110Sxx2C and R5110Sxx2D
(Detector with SENSE pin) have a manual reset (MR) pin.
Watchdog Timer detects the microprocessor output pulse. In addition to the normal type of WDT (R5110Sxx1A
/ R5110Sxx2C) that outputs a reset signal when the detected pulse period is longer than normal, R5110S
supports the window type of WDT (R5110Sxx1B / R5110Sxx2D) that outputs a reset signal when the detected
pulse period is shorter or longer. RESETB outputs the reset signal when using R5110Sxx1A / R5110Sxx1B, and
the WDO pin outputs “L” as the reset signal when using R5110Sxx2C / R5110Sxx2D. The output type of WDO is
Nch open-drain. In addition, R5110Sxx2C and R5110Sxx2D have an inhibiting (INH) pin to stop the watchdog
timer’s monitoring function. The time out period of Watchdog Timer is also adjustable with an external capacitor.
R5110S supports the packages of HSOP-8E and HSOP-18.
FEATURES
●
Operating Voltage Range (Maximum Rating) ········ 3.5V to 36.0V (50.0V)
●
Operating Temperature Range ··························
−40°C
to 125°C
●
Supply Current··············································· Typ. 25µA
●
Supply Current (On standby)····························· Typ. 0.1µA
<Voltage Regulator (VR)>
●
Output Voltage Range ····································· 1.8V to 5.0V
●
Dropout Voltage ············································· Typ. 0.5V (V
OUT
=
5.0V, 500mA)
●
Output Voltage Accuracy ·································· ±1.5% (−40 to 125°C)
●
Output Voltage Temperature Coefficient ·············· Typ. ±100ppm/°C
●
Built-in Short Current Limit Circuit ······················ Typ. 80mA
●
Built-in Overcurrent Protection Circuit ················· Min. 500mA
●
Built-in Thermal Shutdown Circuit ······················ Typ.165C
●
Recommended Ceramic Capacitor····················· 0.1µF or more
1
R5110S
NO.EC-326-140213
<Voltage Detector (VD)>
●
Detector Threshold Range································ 1.6V ~ 5.5V
●
Detector Threshold Accuracy ···························· ±1.8% (−40 to 125°C)
●
Release Delay Accuracy ·································· ±20% (−40 to 125°C)
●
Release Delay Time ········································ Typ. 242ms (C
D
= 0.22µF)
Delay Time is adjustable with an external capacitor.
<Watchdog Timer (WDT)>
●
Open Window Accuracy ··································· ±20% (−40 to 125°C)
●
Open Window Time········································· Typ.18ms (C
TW
= 10nF)
●
Closed Window Time······································· Typ.18ms (C
TW
= 10nF)
●
Long Open Window Time ································· Typ.72ms (C
TW
= 10nF)
●
Ignoring Time················································· Typ.18ms (C
TW
= 10nF)
●
Monitoring Time ············································· Typ.18ms (C
TW
= 10nF)
●
Reset Time···················································· Typ.9.5ms (C
TW
= 10nF)
Each time is adjustable with an external capacitor.
APPLICATIONS
●
Power source for car accessories including car audio equipment, car navigation system, and ETC system.
●
Power source for control units including EV inverter and charge control.
2
R5110S
NO.EC-326-140213
SELECTION GUIDE
R5110S user selectable options (Watchdog Timer type, Detector type, and additional functions with using MR /
INH / WDO pins) are as follows:
Product Name
R5110Sxx1-E2-#E
Package
HSOP-8E
Quantity per Reel
1,000 pcs
Pb Free
Yes
Halogen Free
Yes
HSOP-18
1,000 pcs
Yes
Yes
R5110Sxx2-E2-#E
xx: Specify the set output voltage (V
SET
) and the set detector threshold (-V
SET
) by using serial
numbers starting from 001.
Refer to
“Mark Specification Table”
for details.
Detector
Monitoring Voltage
V
OUT
V
OUT
SENSE
SENSE
Package
HSOP-8E
HSOP-8E
HSOP-18
HSOP-18
Watchdog Timer
Type
Normal
Window
Normal
Window
MR / INH /
WDO pins
−
−
Yes
Yes
RESETB/
D
OUT
pins
RESETB
RESETB
D
OUT
D
OUT
A
B
C
D
Specify the automotive class code.
Operating
Temperature Range
A
-40°C to 125°C
K
-40°C to 125°C
Guaranteed Specs
Temperature Range
25°C
-40°C to 125°C
Screening
High temperature
High and low temperature
4
R5110S
NO.EC-326-140213
PIN DESCRIPTION
HSOP-8E
Top View
8
7
6
5
HSOP-18
Top View
18 17
…
…
11 10
Bottom View
5
6
7
8
Bottom View
＊1
1
2
3
4
4
3
2
1
12
…
…8
9
HSOP-8E (R5110Sxx1A / R5110Sxx1B)
Pin No.
1
2
3
4
5
6
7
8
Symbol
V
DD
CE
GND
C
D
TW
SCK
RESETB
*2
V
OUT
Supply Voltage pin
Chip Enable pin (Active "H")
GND pin
VD Release Delay Time Set pin
WDT Monitoring Time Set pin
WDT Pulse Input pin
Description
Reset Output pin (Active "L"), Nch Open Drain Output type
VD Output pin
*1
The
tab on the bottom of the package enhances thermal performance and is electrically connected to GND (substrate
level). It is recommended that the tab be connected to the ground plane on the board, or otherwise be left open.
RESETB pin is required to pull up to a suitable voltage with an external capacitor.
*2
5
FPGA/CPLD
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