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CS51414EMNR2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
© Semiconductor Components Industries, LLC, 2013
May, 2013 − Rev. 21
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 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
• 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 Pin 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
• These Devices are Pb−Free and are RoHS Compliant
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
SOIC−8
D SUFFIX
CASE 751
1
8
MARKING DIAGRAMS
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
http://onsemi.com
5141x
ALYWy
G
1
8
1
18
18−LEAD DFN
MN SUFFIX
CASE 505
CS5141xy
AWLYYWW G
G
118
CS51411, CS51412, CS51413, CS51414
http://onsemi.com
2
PIN CONNECTIONS
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
BOOST
V
IN
V
IN
V
IN
Vsw
V
SW
V
SW
SHDNB
NC
NC
V
C
V
FB
NC
NC
GND
NC
NC
SYNC
18−Lead DFN
SYNCSHDNB
18
GNDV
SW
V
FB
V
IN
V
C
BOOST
SHDNBBIAS
18
GNDV
SW
V
FB
V
IN
V
C
BOOST
CS51412/4
CS51411/3
CS51411/3
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
BOOST
V
IN
V
IN
V
IN
Vsw
V
SW
V
SW
BIAS
NC
NC
V
C
V
FB
NC
NC
GND
NC
NC
SHDNB
18−Lead DFN
CS51412/4
PACKAGE PIN DESCRIPTION
SOIC−8
Package Pin #
DFN18
Package Pin #
Pin Symbol Function
1 1 BOOST The BOOST pin provides additional drive voltage to the on−chip NPN
power transistor. The resulting decrease in switch on voltage increases
efficiency.
2 2, 3, 4 V
IN
This pin is the main power input to the IC.
3 5, 6, 7 V
SW
This is the connection to the emitter of the on−chip NPN power transistor
and serves as the switch output to the inductor. This pin may be
subjected to negative voltages during switch off−time. A catch diode is
required to clamp the pin voltage in normal operation. This node can
stand −1.0 V for less than 50 ns during switch node flyback.
4
(CS51412/CS51414)
8 BIAS The BIAS pin connects to the on−chip power rail and allows the IC to run
most of its internal circuitry from the regulated output or another low
voltage supply to improve efficiency. The BIAS pin is left floating if this
feature is not used.
5
(CS51411/CS51413)
10 SYNC
This pin provides the synchronization input.
5
(CS51412/CS51414)
4
(CS51411/CS51413)
10
(CS51412/CS51414)
8
(CS51411/CS51413)
SHDNB Shutdown_bar input. This is an active−low logical input, TTL compatible,
with an internal pull−up current source. The IC goes into sleep mode,
drawing less than 85 mA when the pin voltage is pulled below 1.0 V. This
pin may be left floating in applications where a shutdown function is not
required.
6 13 GND Power return connection for the IC.
7 16 V
FB
The FB pin provides input to the inverting input of the error amplifier. If
V
FB
is lower than 0.29 V, the oscillator frequency is divided by four, and
current limit folds back to about 1 A. These features protect the IC under
severe overcurrent or short circuit conditions.
8 17 V
C
The V
C
pin provides a connection point to the output of the error
amplifier and input to the PWM comparator. Driving of this pin should be
avoided because on−chip test circuitry becomes active whenever
current exceeding 0.5 mA is forced into the IC.
− 9, 11, 12, 14, 15, 18 NC No Connection
CS51411, CS51412, CS51413, CS51414
http://onsemi.com
3
PRODUCT SELECTION GUIDE
Part Number Frequency Temperature Range Bias/Sync
CS51411E 260 kHz −40°C to 85°C Sync
CS51411G 260 kHz 0°C to 70°C Sync
CS51412E 260 kHz −40°C to 85°C Bias
CS51412G 260 kHz 0°C to 70°C Bias
CS51413E 520 kHz −40°C to 85°C Sync
CS51413G 520 kHz 0°C to 70°C Sync
CS51414E 520 kHz −40°C to 85°C Bias
CS51414G 520 kHz 0°C to 70°C Bias
SYNC
V
FB
V
SW
2
GND
SHDNB
CS51411/3
1N4148
3.3 V
D3
15 mH
V
IN
100 mF
100 mF
0.1 mF
Figure 1. Application Diagram, 4.5 V − 16 V to 3.3 V @ 1.0 A Converter
C1
C3
R1
R2
C4
0.1 mF
SYNC
Shutdown
L1
C2
4.5 V − 16 V
D1
205
127
1
3
768
4
5
1N5821
BOOST
U1
V
C
MAXIMUM RATINGS
Rating Value Unit
Operating Junction Temperature Range, T
J
−40 to 150 °C
Lead Temperature Soldering: Reflow for Leaded: (SMD styles only) (Note 1)
Reflow for Pb−Free: (SMD styles only) (Note 2)
230 peak
260 peak
(Note 3)
°C
Storage Temperature Range, T
S
−65 to +150 °C
ESD Damage Threshold (Human Body Model) 2.0 kV
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. 60−150 second above 183°C, 30 second maximum at peak.
2. 60−150 second above 217°C, 40 second maximum at peak.
3. +5°C/0°C allowable conditions, applies to both Pb and Pb−Free Devices.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

CS51414EMNR2G

Mfr. #:
Buy CS51414EMNR2G
Manufacturer:
ON Semiconductor
Description:
Switching Voltage Regulators 1.5A 520kHz BUCK REG LOW VOLTAGE
Lifecycle:
New from this manufacturer.
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