SC283 SEMTECH [Semtech Corporation], SC283 Datasheet - Page 10

• Manufacturer Part Number: SC283
• Description: Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator
• Manufacturer: SEMTECH [Semtech Corporation]

© 2010 Semtech Corp.
Pin Descriptions
3, 13, T1
4, 12, T2
Pin #
10
11
14
15
16
17
18
1
2
5
6
7
8
9
Pin Name
VOUTB
VOUTA
CTL3A
CTL2A
CTL1A
CTL0A
GNDA
CTL3B
CTL2B
CTL1B
CTL0B
GNDB
VINA
VINB
LXA
LXB
Pin Function
Channel A. Input supply voltage for the converter power stage and internal circuitry.
Switching node of Channel A - connect an inductor between this pin and the output capacitor.
Channel A. Ground connection for converter power stage and internal circuitry.
Channel B. Ground connection for converter power stage and internal circuitry.
Channel B. Control bit 3 - see Table 1 for decoding. This pin has a 1 MΩ internal pulldown resistor. This resis-
tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in
undervoltage lockout.
Channel B. Control bit 2 - see Table 1 for decoding. This pin has a 1 MΩ internal pulldown resistor. This resis-
tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in
undervoltage lockout.
Channel B. Control bit 1 - see Table 1 for decoding. This pin has a 1 MΩ internal pulldown resistor. This resis-
tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in
undervoltage lockout.
Channel B. Control bit 0 - see Table 1 for decoding. This pin has a 1 MΩ internal pulldown resistor. This resis-
tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in
undervoltage lockout.
Output voltage sense pin of Channel B.
Channel B. Input supply voltage for the converter power stage and internal circuitry.
Switching node of Channel B - connect an inductor between this pin and the output capacitor.
Channel A. Control bit 3 - see Table 1 for decoding. This pin has a 1 MΩ internal pulldown resistor. This resis-
tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in
undervoltage lockout.
Channel A. Control bit 2 - see Table 1 for decoding. This pin has a 1 MΩ internal pulldown resistor. This resis-
tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in
undervoltage lockout.
Channel A. Control bit 1 - see Table 1 for decoding. This pin has a 1 MΩ internal pulldown resistor. This resis-
tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in
undervoltage lockout.
Channel A. Control bit 0 - see Table 1 for decoding. This pin has a 1 MΩ internal pulldown resistor. This resis-
tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in
undervoltage lockout.
Output voltage sense pin of Channel A.
10
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SC283