SC1417BEVB 데이터 시트보기 (PDF) - Semtech Corporation
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SC1417BEVB Datasheet PDF : 11 Pages
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SC1417B
POWER MANAGEMENT
Pin Configuration
TOP VIEW
COMP
1
8
FB
2
7
EN
3
6
GND
4
5
LBO
LBI
IN
LX
Ordering Information
Part Number
Package
SC1417BIMSTR(1)
MSOP-8
SC1417BIMSTRT(1)(2)
SC1417BEVB
MSOP-8
Evaluation Board
Note:
(1) Only available in tape and reel packaging. A reel
contains 2500 devices.
(2) Available in lead-free packaging only. This product is
fully WEEE and RoHS compliant.
(MSOP-8)
Pin Descriptions
Pin # Pin Name
Pin Function
1
COMP Compensation pin for error amplifier. Connect a series RC network from this pin to ground for
frequency compensation. Typical values are 33kΩ/3.3nF. Placing a 100pF - 10nF capacitor from this
pin to ground reduces the output and input capacitor values required for stability at the expense of
slower transient response.
2
FB
Feedback pin. Connect to the output through a voltage divider to set output voltage.
VOUT
= 1.22 • (1+
R1
R4
)
3
EN
Enable pin. Pull this pin low for shutdown mode. The device quiescent current reduces to 40µA (typ.).
This pin can be left floating or pulled up to a voltage less then 6V to enable the device.
4
GND Ground.
5
LX
Switch pin (the inductor and diode junction). Keep traces on this pin short and wide to minimize EMI.
6
IN
Supply pin. Bypass this pin to GND with a capacitor as close to pins 4 and 6 as possible.
7
LBI Low battery detector input. Connect to IN through a voltage divider to set low battery indicator threshold.
VTH(LO)
=
0.2 • (1+
R2
R6
)
8
LBO Low battery detector open collector output. This pin pulls low when VLBI is below 200mV (typ.). Pullup
using a 1MΩ resistor.
2006 Semtech Corp.
4
www.semtech.com
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