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 V
2
™
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
8
1
SOIC-8
D SUFFIX
CASE 751
http://onsemi.com
MARKING DIAGRAMS
8
5141x
ALYWy
G
1
18
1
CS5141xy
AWLYYWW
G
G
18
1
18-LEAD DFN
MN SUFFIX
CASE 505
•
V
2
Architecture Provides Ultrafast 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
mA
Quiescent Current During Power-Down
Thermal Shutdown
Soft-Start
Pin-Compatible with LT1375 and LT1376
Pb-Free Packages are Available
5141x = Device Code
x = 1, 2, 3 or 4
A
= Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
y = E or G
G
= Pb-Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
©
Semiconductor Components Industries, LLC, 2007
1
September, 2007 - Rev. 18
Publication Order Number:
CS51411/D
ONSEMI [ ON SEMICONDUCTOR ]
