A5975DTR STMicroelectronics, A5975DTR Datasheet - Page 43

• Manufacturer Part Number: A5975DTR
• Description: IC REG SW STEP-DOWN 3A 8SOIC
• Manufacturer: STMicroelectronics
• Series: -r
• Type: Step-Down (Buck), PWMr

Specifications of A5975DTR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.235 V ~ 35 V
• Current - Output: 3A
• Frequency - Switching: 250kHz
• Voltage - Input: 4 V ~ 36 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width) Exposed Pad
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11426-2

A5975D
8.12
External soft-start network
At startup, the device can quickly increase the current up to the current limit in order to
charge the output capacitor. If soft ramp-up of the output voltage is required, an external
soft-start network can be implemented, as shown in
up to an external reference through R and the BJT clamps the COMP pin.
This clamps the duty cycle, limiting the slew rate of the output voltage.
Figure 32. Soft-start network example
Doc ID 018760 Rev 1
Figure
32. The capacitor C is charged
Application information
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