PDP-507CMX
206
1
2
3
4
1
2
3
4
C
D
F
A
B
E
LM3478MMX (LVDS ASSY : IC301)
• Switching Regulator
Block Diagram
No.
Pin Name
Pin Function
1
I
SEN
Current sense input pin. Voltage generated across an external sense resistor is fed into this pin.
2
COMP
Compensation pin. A resistor, capacitor combination connected to this pin provides compensation for the
control loop.
3
FB
Feedback pin. The output voltage should be adjusted using a resistor divider to provide 1.26V at this pin.
4
AGND
Analog ground pin.
5
PGND
Power ground pin.
6
DR
Drive pin of the IC. The gate of the external MOSFET should be connected to this pin.
7
FA/SD
Frequency adjust and Shutdown pin. A resistor connected to this pin sets the oscillator frequency. A high
level on this pin for
≥
30
µ
s will turn the device off. The device will then draw less than 10
µ
A from the supply.
8
V
IN
Power Supply Input pin.
Pin Function
Summary of Contents for PDP 507CMX
Page 44: ...PDP 507CMX 44 1 2 3 4 1 2 3 4 C D F A B E 4 2 OVERALL CONNECTION DIAGRAM 2 2 ...
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Page 84: ...PDP 507CMX 84 1 2 3 4 1 2 3 4 C D F A B E 500ns div 500ns div 200ns div ...
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