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CS51411E Datasheet(PDF) 1 Page - ON Semiconductor

No. de pieza CS51411E
Descripción Electrónicos  1.5A, 260 kHz AND 520 kHz, LOW VOLTAGE BUCK REGULATORS WITH EXTERNAL BIAS OR SYNCHRONIZATION CAPABILITY
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Fabricante Electrónico  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

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 Semiconductor Components Industries, LLC, 2002
September, 2002 – Rev. 11
1
Publication Order Number:
CS51411/D
CS51411, CS51412,
CS51413, CS51414
1.5 A, 260 kHz and
520 kHz, Low Voltage Buck
Regulators with External
Bias or Synchronization
Capability
The CS5141X products are 1.5 A buck regulator ICs. These devices
are fixed–frequency operating at 260 kHz and 520 kHz. The regulators
use the V2
 control architecture to provide unmatched transient
response, the best overall regulation and the simplest loop
compensation for today’s high–speed logic. These products
accommodate input voltages from 4.5 V to 40 V.
The CS51411 and CS51413 contain synchronization circuitry. The
CS51412 and CS51414 have the option of powering the controller
from an external 3.3 V to 6.0 V supply in order to improve efficiency,
especially in high input voltage, light load conditions.
The on–chip NPN transistor is capable of providing a minimum of
1.5 A of output current, and is biased by an external “boost” capacitor
to ensure saturation, thus minimizing on–chip power dissipation.
Protection circuitry includes thermal shutdown, cycle–by–cycle
current limiting and frequency foldback. The CS51411 and CS51413
are functionally pin–compatible with the LT1375. The CS51412 and
CS51414 are functionally pin–compatible with the LT1376.
Features
V2 Architecture Provides Ultra–Fast Transient Response, Improved
Regulation and Simplified Design
2.0% Error Amp Reference Voltage Tolerance
Switch Frequency Decrease of 4:1 in Short Circuit Conditions
Reduces Short Circuit Power Dissipation
BOOST Lead Allows “Bootstrapped” Operation to Maximize
Efficiency
Sync Function for Parallel Supply Operation or Noise Minimization
Shutdown Lead Provides Power–Down Option
85 µA Quiescent Current During Power–Down
Thermal Shutdown
Soft Start
Pin–Compatible with LT1375 and LT1376
X
= 1, 2, 3 or 4
A
= Assembly Location
WL, L
= Wafer Lot
YY, Y
= Year
WW, W
= Work Week
T
= Temperature Range, E or G
SO–8
D SUFFIX
CASE 751
1
8
MARKING DIAGRAM
1
5141X
ALYWT
8
SYNC
SHDNB
18
GND
VSW
VFB
VIN
VC
BOOST
PIN CONNECTIONS
SHDNB
BIAS
18
GND
VSW
VFB
VIN
VC
BOOST
CS51412/4
CS51411/3
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
http://onsemi.com


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