ST1S14 STMicroelectronics, ST1S14 Datasheet - Page 11

• Manufacturer Part Number: ST1S14
• Description: Up to 3 A step down switching regulator
• Manufacturer: STMicroelectronics

ST1S14
4.4
4.5
4.6
Error amplifier
The voltage error amplifier is the core of the loop regulation. It is a transconductance
operational amplifier whose non inverting input is connected to the internal voltage
reference (1.222 V), while the inverting input (FB) is connected to the external divider or
directly to the output voltage.
The error amplifier is internally compensated to minimize the size of the final application.
Table 7.
The error amplifier output is compared with the inductor current sense information to
perform PWM control
Inhibit function
The inhibit feature is used to set the device in standby mode according to
table. When the device is disabled, the power consumption is reduced to less than 40 µA.
The pin EN2 is also V
Thermal shutdown
The shutdown block generates a signal that turns OFF the power stage if the temperature of
the chip goes higher than a fixed internal threshold (150±10 °C). The sensing element of the
chip is very close to the PDMOS area, ensuring fast and accurate temperature detection. A
hysteresis of approximately 15 °C keeps the device from turning ON and OFF continuously.
Transconductance
Low frequency gain
C
C
R
P
C
C
Description
Uncompensated error amplifier characteristics
IN
compatible.
Doc ID 17977 Rev 1
Values
218 µS
200 kΩ
211 pF
93 dB
24 pF
Functional description
Table 2: Truth
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