SC4611 Datasheet, PDF (5/11 Pages) Semtech Corporation – Wide Input Range High Performance Synchronous Buck Switching Regulator

SC4611
POWER MANAGEMENT
Pin Descriptions
Pin # Pin Name
Pin Function
1
PH
Switching junction of high side Mosfet source and low side Mosfet drain.
2
GDH
Gate drive output for high side N-Channel MOSFET.
3
BST
Boost capacitor connection for the high side gate drive.
Connect an external capacitor and a diode as shown in the Typical Application Circuit.
4
VIN
Input supply voltage.
5
BDI
Base drive for AVCC/PVCC regulator.
6
CS-
Inverting input for the current sense comparator
7
CS+
Non inverting input for the current sense comparator
8
FB
Feedback input pin.The reference level is 0.5V
9
EAO
Error amplifier output for compensation.
10
POK
Open drain of power good output.
11
OVP
Overvoltage protection input. The reference level is 0.5V
12
CLM
Current Limit Mode select input. Connect to AVCC to enable hiccup or connect to AGND to
bypass hiccup mode.
13
OSC
Connect a resistor to AGND for programming the oscillator frequency.
14
SS/SH Soft start pin. Hold low to shutdown the device.
15
AGND Analog signal ground.
16
SYNC
Oscillator synchronization pin. Connect to AGND if not used.
17
AVCC Supply voltage for analog circuitry.
18
PGND Power ground.
19
GDL
Gate drive output for the low side N-Channel MOSFET.
20
PVCC Supply voltage for output drivers.
 2004 Semtech Corp.
5
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