LM2717-ADJ_08 NSC [National Semiconductor], LM2717-ADJ_08 Datasheet - Page 3

• Manufacturer Part Number: LM2717-ADJ_08
• Description: Dual Step-Down DC/DC Converter
• Manufacturer: NSC [National Semiconductor]

Pin Descriptions
Pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
SHDN2
SHDN1
FSLCT
PGND
PGND
AGND
AGND
AGND
PGND
PGND
Name
SW2
SW1
CB2
CB1
FB1
FB2
SS2
SS1
V
V
V
V
V
V
BG
C1
C2
IN
IN
IN
Power ground. PGND and AGND pins must be connected together directly at the part.
Power ground. PGND and AGND pins must be connected together directly at the part.
Analog ground. PGND and AGND pins must be connected together directly at the part.
Buck 1 output voltage feedback input.
Buck 1 compensation network connection. Connected to the output of the voltage error amplifier.
Bandgap connection.
Buck 2 compensation network connection. Connected to the output of the voltage error amplifier.
Buck 2 output voltage feedback input.
Analog ground. PGND and AGND pins must be connected together directly at the part.
Analog ground. PGND and AGND pins must be connected together directly at the part.
Power ground. PGND and AGND pins must be connected together directly at the part.
Power ground. PGND and AGND pins must be connected together directly at the part.
Buck 2 power switch input. Switch connected between V
Analog power input. All V
at the part.
Analog power input. All V
at the part.
Buck 2 converter bootstrap capacitor connection.
Shutdown pin for Buck 2 converter. Active low.
Buck 2 soft start pin.
Switching frequency select input. Use a resistor to set the frequency anywhere between 300kHz
and 600kHz.
Buck 1 soft start pin.
Shutdown pin for Buck 1 converter. Active low.
Buck 1 converter bootstrap capacitor connection.
Analog power input. All V
at the part.
Buck 1 power switch input. Switch connected between V
IN
IN
IN
pins are internally connected and should be connected together directly
pins are internally connected and should be connected together directly
pins are internally connected and should be connected together directly
3
Function
IN
IN
pins and SW2 pin.
pins and SW1 pin.
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