Buffer Summer Splitter Design

T

taddharlin

Buffer Summer Splitter

flux

You want a Buffer Summer Splitter design.
  • I created a plan to define the signal path, capture the electrical requirements, build the schematic, and prepare the PCB layout.
  • Since the plan is ready, click Start in the plan bar to begin.
  • If you want, I can also update the plan first with details like input/output count, signal type, voltage range, and bandwidth.
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Symbol

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U1
2
Can you tell me about U1?
J

jlamflux

@copilot Can you tell me about U1?
3y

copilot

U1 refers to the MT3608 High Efficiency 1.2MHz 2A Step Up Converter. Here are some key features and specifications:
  • It has an integrated 80m $\Omega$ Power MOSFET[9].
  • The input voltage range is 2V to 24V[9].
  • It operates at a fixed switching frequency of 1.2MHz[9].
  • The internal switch current limit is 4A[9].
  • The output voltage is adjustable and can go up to 28V[9].
  • It has an automatic pulse frequency modulation mode at light loads[9].
  • The efficiency can reach up to 97%[9].
  • It is available in a 6-Pin SOT23-6 Package[9].
  • The device includes under-voltage lockout, current limiting, and thermal overload protection to prevent damage in the event of an output overload[9].
  • The absolute maximum ratings for the device are: IN, EN voltages: $-0.3 \mathrm{~V} $ to $26 \mathrm{~V} $, FB Voltages: $-0.3 \mathrm{~V} $ to $6 \mathrm{~V} $, SW Voltage: $-0.3 \mathrm{~V} $ to $30 \mathrm{~V} $, Peak SW Sink and Source Current: 4A[10].
  • The output voltage can be set using a resistor divider, $\mathrm{R} 1$ and $\mathrm{R} 2$ to the FB pin. The output voltage is given by VOUT =VREF×(1+R1R2)V_{\text {OUT } } =V_{R E F} \times\left(1+\frac{R_{1} } {R_{2} } \right) where the internal reference VREF is 0.6V (Typical)[11].
[9]: Page 1
[10]: Page 1
[11]: Page 4
3y
J

jlamflux

Can you show me the typical application circuit?
3y

copilot

I’m having trouble responding because something went wrong on my end. Sorry about that.
3y
D2
.1
VIN+
VIN-
C3
Capacitance
22uF
C4
Capacitance
22uF
R3
Resistance
2.2kΩ
R2
Resistance
100kΩ
VOUT+
VOUT-
U2
Inductance
22uH
Name
Pin #
Type
Part Type
Terminal Order
VIN-
Unspecified
Terminal
VIN+
Unspecified
Terminal
VOUT-
Unspecified
Terminal
VOUT+
Unspecified
Terminal

MT3608 Breakout Board Rev C