S-1701A2521-M5T1G Seiko Instruments, S-1701A2521-M5T1G Datasheet - Page 34

• 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

34
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
S-1701 Series
Regulator block
The S-1701 Series requires an output capacitor between the VOUT and VSS pins for phase compensation. A ceramic
capacitor with a capacitance of 1.0 μF or more provides a stable operation in all temperature ranges. When using an OS
capacitor, tantalum capacitor, or aluminum electrolytic capacitor, a capacitor with a capacitance of 1.0 μF or more and an
ESR of 10 Ω or less is required.
The output overshoot and undershoot values, which are transient response characteristics, vary depending on the output
capacitor value. The required capacitance value for the input capacitor differs depending on the application.
The recommended application values are C
evaluation using the actual device, including evaluation of temperature characteristics.
1. Low dropout voltage regulator
2. Low ESR
3. Output voltage (V
4. Line regulation
5. Load regulation (ΔV
6. Dropout voltage (V
Selection of Input and Output Capacitors (C
Explanation of Terms
The low dropout voltage regulator is a voltage regulator whose dropout voltage is low due to its built-in low on-
resistance transistor.
A capacitor whose ESR (Equivalent Series Resistance) is low. The S-1701 Series enables use of a low ESR capacitor,
such as a ceramic capacitor, for the output-side capacitor (C
The accuracy of the output voltage is ensured at ±1.0% under the specified conditions of fixed input voltage
output current, and fixed temperature.
*1. Differs depending on the product.
Caution If the above conditions change, the output voltage value may vary and exceed the accuracy range of
Indicates the dependency of the output voltage on the input voltage. That is, the values show how much the output
voltage changes due to a change in the input voltage with the output current remaining unchanged.
Indicates the dependency of the output voltage on the output current. That is, the values show how much the output
voltage changes due to a change in the output current with the input voltage remaining unchanged.
Indicates the difference between the input voltage V
voltage has fallen to 98% of the output voltage value V
V, and the output voltage at that point (V
V
drop
= V
IN1
the output voltage. Please see the electrical characteristics and attached characteristics data for
details.
− (V
OUT3
⎛
⎝
ΔV
× 0.98)
OUT
ΔV
drop
IN
OUT2
)
•V
OUT1
)
OUT
)
⎞
⎠
OUT3
IN
= 1.0 μF or more and C
× 0.98).
Seiko Instruments Inc.
IN1
OUT3
, which is the input voltage (V
IN
after V
L
). A capacitor whose ESR is 10 Ω or less can be used.
, C
L
IN
)
was gradually decreased from V
L
= 1.0 μF or more, however, perform thorough
IN
) at the point where the output
IN
Rev.3.0
= V
OUT(S)
*1
, fixed
_00
+ 1.0