S-1701A2521-M5T1G Seiko Instruments, S-1701A2521-M5T1G Datasheet - Page 43

• Manufacturer Part Number: S-1701A2521-M5T1G
• Description: IC DETECT/REG 400MA 2.5V SOT23-5
• Manufacturer: Seiko Instruments

Specifications of S-1701A2521-M5T1G

• Applications: Converter, Battery Powered Devices
• Voltage - Input: 2 ~ 6.5 V
• Number Of Outputs: 1
• Voltage - Output: 2.5V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Rev.3.0
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
2. Delay circuit
3. Delay circuit output voltage detection type (S-1701 Series D/E/F/K/L/M/U/V/W types)
The delay circuit delays the output signal from the time when the SENSE voltage (V
(+V
below the detection voltage (−V
The delay time (t
constant current and a capacitor.
If the input voltage or load current changes transiently, an undershoot or overshoot occurs in the output voltage of the
regulator. In the product types in which the output voltage of the regulator is detected by the detector, if the output
voltage is the detection voltage or lower due to the undershoot, the detector operates and a reset signal may be
output. To prevent this, set the value of the input-and-output capacitor of a regulator so that the undershoot is the
minimum value or set a voltage range that allows the difference between the output voltage and detection voltage to be
equal to or greater than the undershoot.
DET
_00
) when V
SENSE
Remark The above figure shows the case when the SENSE pin is connected to VIN.
D
) is a fixed value that is determined by a counter and a built-in clock generator which consists of
is turned on (refer to point B in Figure 37). The output signal is not delayed when V
Hysteresis width (V
DET
) (refer to point A in Figure 37).
V
IN
(V
HYS
SENSE
Seiko Instruments Inc.
)
(1)
V
)
Figure 37 Operation
SS
(2)
A
(3)
(4)
B
(5)
t
D
Detection voltage (−V
Minimum operating voltage
Release voltage (+V
V
V
Output from VDOUT pin
DD
SS
SENSE
) exceeds the release voltage
DET
DET
)
)
S-1701 Series
SENSE
goes
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