CS8101YDWFR20 ON Semiconductor, CS8101YDWFR20 Datasheet - Page 6

• Manufacturer Part Number: CS8101YDWFR20
• Description: IC REG LDO 100MA 5V MPWR 20SOIC
• Manufacturer: ON Semiconductor

Specifications of CS8101YDWFR20

• Regulator Topology: Positive Fixed
• Voltage - Output: 5V
• Voltage - Input: 6 ~ 26 V
• Voltage - Dropout (typical): 0.4V @ 100mA
• Number Of Regulators: 1
• Current - Output: 100mA
• Current - Limit (min): 105mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: CS8101YDWFR20OSTR

controlled by a low voltage detection circuit. The circuit is
functionally independent of the rest of the IC thereby
guaranteeing that the RESET signal is valid for V
as 1.0 V.
a sufficiently long delay for most microprocessor based
applications. RC values can be chosen using the following
formula:
where:
The RESET output is an open collector NPN transistor,
An external RC network on the lead (Figure 5) provides
R
R
R
C
t
V
Delay
TOT
RST
IN
RST
RST
CS8101
= mP port impedance
Figure 5. RC Network for RESET Delay
= R
= RESET Delay resistor
= RESET Delay capacitor
= desired delay time
= V
R TOT C RST +
RST
SAT
RESET
V
in parallel with R
OUT
of RESET lead (0.7 V @ turn − ON)
R
RST
ln
C
RST
V RST *V OUT
−t Delay
V T *V OUT
IN
C
OUT
5.0 V to mP
and System
Power
OUT
to mP
RESET
Port
http://onsemi.com
as low
6
control its power source, the CS8101 regulator. An I/O port
on the mP and the SWITCH port are used to drive the base
of Q1. When Q1 is driven into saturation, the voltage on the
ENABLE lead falls below its lower threshold. The
regulator’s output is enabled. When the drive current is
removed, the voltage on the ENABLE lead rises, the output
is switched off and the IC moves into Sleep mode where it
draws 50 mA (max).
the system has added flexibility. Once the system is running,
the state of the SWITCH is irrelevant as long as the I/O port
continues to drive Q1. The microprocessor can turn off its
own power by withdrawing drive current, once the
SWITCH is open. This software control at the I/O port
allows the microprocessor to finish key housekeeping
functions before power is removed.
The logic options are summarized in Table 1.
50 mA to Q1. In automotive applications the SWITCH is
connected to the ignition switch.
Microprocessor
V
The circuit depicted in Figure 6 lets the microprocessor
By coupling these two controls with the ENABLE lead,
The I/O port of the microprocessor typically provides
T
I/O Drive
= RESET threshold.
OFF
ON
Table 1. Logic Control of CS8101 Output
Switch
Closed
Closed
Open
Open
ENABLE
HIGH
LOW
LOW
LOW
Output
OFF
ON
ON
ON