A5974ADTR STMicroelectronics, A5974ADTR Datasheet - Page 38

• Manufacturer Part Number: A5974ADTR
• Description: IC REG SW STEP-DOWN 2A 8SOIC
• Manufacturer: STMicroelectronics
• Series: -r
• Type: Step-Down (Buck), PWMr

Specifications of A5974ADTR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.235 V ~ 35 V
• Current - Output: 2A
• Frequency - Switching: 500kHz
• 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: 497-11423-2

Application information
8.8
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Figure 26. Negative buck-boost regulator
Floating boost current generator
The A5974AD does not support a nominal boost conversion as this topology requires a low
side switch, however, a floating boost can be useful in applications where the load can be
floating. A typical example is a current generator for LEDs driving, as the LED does not
require a connection to the ground.
Figure 27. Floating boost topology
Doc ID 018762 Rev 1
A5975AD
Ω
A5974AD
AM09654v1
6