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PDF SC4217 Data sheet ( Hoja de datos )
| Número de pieza | SC4217 | |
| Descripción | Very Low Input /Very Low Dropout 3 Amp Regulator | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SC4217 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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SC4217
POWER MANAGEMENT
Very Low Input /Very Low Dropout
3 Amp Regulator With Enable
Features
Description
Input voltage range from 1.8V to 5.5V
Typical 300mV dropout @ 3A
Adjustable output from 1.24V
Over-current and over-temperature protection
Enable pin
10µA shutdown current
www.DataSheeFtu4Ull.cionmdustrial temperature range
TO263-5 package, fully WEEE and RoHS compliant
Applications
Telecom/networking equipment
Motherboards/peripheral cards
Industrial equipment
Wireless infrastructure
Set-top boxes
Medical equipment
The SC4217 is a 3A, high performance LDO designed for
use in applications requiring very low input voltage and
very low dropout voltage. It operates with an input volt-
age as low as 1.8V and a programmable output voltage
from 1.24V. The SC4217 features ultra- low dropout, ideal
for applications where
tionally, the SC4217 has
aVnOUeTniasbvleerpyincltoosfeutrothVeIrNr. eAddudcie-
power dissipation while shut down. The SC4217 provides
excellent regulation over line, load and temperature.
The SC4217 is available in a TO263-5 package and is fully
WEEE and RoHS compliant.
Typical Application Circuit
EN
SC4217
1
4
VO
EN
2
VO
VIN
VIN
3 GND
ADJ 5
R1
C2
C1
R2
00
October 29, 2007
1 page  
SC4217
Pin Descriptions
Pin #
Pin Name Pin Function
1
EN
Enable input. Pulling this pin below 0.4V turns off the regulator reducing the quiescent current to a franction
of its operating value. The device will be enabled if this pin is left open. Connect to VIN if not being used.
Input voltage. For regulation at full load, the input to this pin must be between (VO+0.5V) and 5.5V. Minimum
2 VIN VIN = 1.8V. A large bulk capacitance should be placed closey to this pin to ensure that the input supply does
not sag below 1.8V. A minimum of 4.7µF ceramic capacitors should be placed directly at this pin.
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4
GND
VO
Reference ground. The GND pin and the exposed die pad must be connected together at the IC pin.
The pin is the power output of the device. A minimum of 10µF capactor should be placed directly at this pin.
5
ADJ
Use external feedback resistors to program the output voltage. See application circuit on page 1.
VO= [(R2+R1)*1.24V]/R2. The ADJ pin cannot be tied directly either to VO pin or to GND pin.
T
THERMAL
PAD
Thermal pad should be connected to PCB ground plane for thermal and electrical purposes.
Block Diagram
RSense
VIN
Current Limit
Reference
VDD
1.5uA
EN
VPump
Thermal
Shutdown
VOUT
VIN
Reverse Voltage
Shutdown
1.24V
REF
VO
ADJ
GND
5 Page 
Land Pattern — TO263-5
SC4217
www.DataSheet4U.com
H
DIMENSIONS
DIM INCHES MILLIMETERS
G .125
3.17
H .420
10.67
K K .350
P .067
8.89
1.70
X .042
1.07
Y .140
3.56
Z
Z .615
15.62
G
Y
P
X
NOTES:
1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
Contact Information
Semtech Corporation
Power Management Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805) 498-2111 Fax: (805) 498-3804
www.semtech.com
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SC4217.PDF ] | |
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