SC4524EVB View Datasheet(PDF) - Semtech Corporation
Part Name
Description
Manufacturer
SC4524EVB Datasheet PDF : 21 Pages
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SC4524
POWER MANAGEMENT
Pin Configuration
TOP V IEW
SW
1
8
VIN
2
7
R O SC
3
6
GND
4
5
BST
FB
C O MP
SS
(8 Pin SOIC -EDP)
Underside metal must be soldered to ground.
Ordering Information
Part Number
SC4524SETRT(1)(2)
SC4524EVB
Package
SOIC-8 EDP
Evaluation Board
Notes:
(1) Only available in tape and reel packaging. A reel contains
2500 devices.
(2) Lead free product. This product is fully WEEE and RoHS
compliant.
Pin Descriptions
SO-8EDP Pin Name
Pin Function
1
SW
The emitter of the internal NPN power transistor. Connect this pin to the inductor and the
freewheeling diode.
2
VIN
Power supply to the SC4524. It is also connected to the collector of the internal NPN power
transistor. It must be bypassed with a ceramic capacitor to ground.
3
ROSC Frequency setting pin. An external resistor from his pin to the ground sets the oscillator frequency.
4
GND Ground pin.
Soft start and enable pin.
(1). A capacitor from SS pin to the ground provides soft-start and overload hiccup functions. Soft
5
SS start is recommended for all applications.
(2). Pulling SS pin below 0.4V shuts off the regulator and reduces the input supply current to
40uA at 5V.
Compensation pin. It is also the output of the internal error amplifier.
6
COMP (1). A RC network at this pin compensates the control loop.
(2). The voltage at this pin controls the peak current of the internal switch.
7
FB
The output voltage feedback pin. It is also the inverting input of the error amplifier.
8
Metal
Pad
BST
Supply pin to the power transistor driver. Tie to external bootstrap circuit to generate a local
supply voltage higher than the input voltage in order to fully turn on the internal power transistor.
The exposed pad at the bottom of the package is electrically connected to the ground pin of the
SC4524. It also provides a thermal contact to the circuit board. It has to be soldered to the analog
ground of the PC board.
2006 Semtech Corp.
4
www.semtech.com
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