SC2453ITSTR(2002) Ver la hoja de datos (PDF) - Semtech Corporation
Número de pieza
componentes Descripción
Lista de partido
SC2453ITSTR Datasheet PDF : 14 Pages
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SC2453
POWER MANAGEMENT
Pin Descriptions
PRELIMINARY
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Pin Name
ILIM1
FB1
EO1
BD4
FB4
SS/SHDN
SYNC
POK
OSC
FB3
BD3
EO2
FB2
ILIM2
AGND
AVCC
BST2
GD2H
PH2
GD2L
PGND
PVCC
GD1L
PH1
GD1H
BST1
VIN
BDI
Pin Function
Current limit threshold set for the OUTPUT1. An external resistor adjusts the limit.
Feedback input for OUTPUT1.
Error amplifier output for compensation of OUTPUT1.
Positive linear regulator base driver.
Feedback input for OUTPUT4.
Soft start pin. Hold low to shutdown part.
Oscillator synchronization pin.
Open drain power good output.
Connect a resistor to AGND for programming the oscillator frequency.
Feedback input for OUTPUT3.
Negative linear regulator base driver.
Error amplifier output for compensation of OUTPUT2.
Feedback input for OUTPUT2.
Current limit threshold set for OUTPUT2. An external resistor adjusts the limit.
Analog signal ground.
Supply voltage for analog circuitry.
Boost capacitor connection for the OUTPUT2 high side gate drive. Connect an external
capacitor and a diode as shown in the Typical Application Circuit.
Gate drive output for OUTPUT2. It is 180 degrees out of phase with GD1H.
Switching node for OUTPUT2 external inductor connection.
Gate drive output for OUTPUT2, low side N-Channel MOSFET.
Power ground.
Supply voltage for output drivers.
Gate drive output for OUTPUT1, low side N-Channel MOSFET.
Switching node for OUTPUT1 external inductor connection.
Gate drive output for OUTPUT1, high side N-Channel MOSFET.
Boost capacitor connection for the OUTPUT1 high side gate drive. Connect an external
capacitor and a diode as shown in the Typical Application Circuit.
Input supply voltage.
Base drive for AVCC/PVCC regulator.
2002 Semtech Corp.
6
www.semtech.com
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