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NCV51411PWR2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
© Semiconductor Components Industries, LLC, 2013
May, 2013 − Rev. 16
1 Publication Order Number:
NCV51411/D
NCV51411
1.5 A, 260 kHz, Low Voltage
Buck Regulator with
Synchronization Capability
The NCV51411 is a 1.5 A buck regulator IC operating at a
fixed−frequency of 260 kHz. The device uses the V
2
t control
architecture to provide unmatched transient response, the best overall
regulation and the simplest loop compensation for today’s high−speed
logic. The NCV51411 accommodates input voltages from 4.5 V to
40 V and contains synchronization circuitry.
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 NCV51411 is
functionally pin−compatible with the LT1375.
Features
• V
2
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 Pin Provides Power−Down Option
• 85 mA Quiescent Current During Power−Down
• Thermal Shutdown
• Soft−Start
• Pin Compatible with LT1375 (SO−8 Version)
• NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
• These Devices are Pb−Free and are RoHS Compliant
SO−8
D SUFFIX
CASE 751
1
8
MARKING
DIAGRAMS
http://onsemi.com
SO−16W EP
PW SUFFIX
CASE 751AG
1
16
NCV51411
AWLYYWWG
1
16
51411
ALYWE
G
1
8
18−LEAD DFN
MN SUFFIX
CASE 505
1
NCV51411
AWLYYWW G
G
11
8
18
A = Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
E = Automotive Grade
G or G = Pb−Free Package
(Note: Microdot may be in either location)
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
ORDERING INFORMATION
NCV51411
http://onsemi.com
2
SYNC
V
FB
V
SW
2
GND
SHDNB
NCV51411
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
Peak Transient Voltage (31 V Load Dump @ V
IN
= 14 V) 45 V
Operating Junction Temperature Range, T
J
−40 to 150 °C
Lead Temperature Soldering: Reflow: (Note 1) 240 peak
(Note 2)
°C
Storage Temperature Range, T
S
−65 to +150 °C
ESD (Human Body Model)
(Machine Model)
(Charge Device Model)
2.0
200
>1.0
kV
V
kV
Package Thermal Resistance
SO−8 Junction−to−Case, R
q
JC
SO−8 Junction−to−Ambient, R
q
JA
SO−16 Junction−to−Case, R
q
JC
SO−16 Junction−to−Ambient, R
q
JA
(Note 3)
18−Lead DFN Junction−to−Ambient, R
q
JA
(Note 3)
45
165
16
35
38
°C/W
°C/W
°C/W
°C/W
°C/W
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.
*The maximum package power dissipation must be observed.
1. 60 second maximum above 183°C.
2. −5°C/0°C allowable conditions.
3. 4 layer board, 1 oz copper outer layers, 0.5 oz copper inner layers, 600 sqmm copper area
MAXIMUM RATINGS (Voltages are with respect to GND)
Pin Name V
Max
V
MIN
I
SOURCE
I
SINK
V
IN
(DC)* 40 V −0.3 V N/A 4.0 A
BOOST 40 V −0.3 V N/A 100 mA
V
SW
40 V −0.6 V/−1.0 V, t < 50 ns 4.0 A 10 mA
V
C
7.0 V −0.3 V 1.0 mA 1.0 mA
SHDNB 7.0 V −0.3 V 1.0 mA 1.0 mA
SYNC 7.0 V −0.3 V 1.0 mA 1.0 mA
V
FB
7.0 V −0.3 V 1.0 mA 1.0 mA
*See table above for load dump.
NCV51411
http://onsemi.com
3
PACKAGE PIN DESCRIPTION
SO−8 SO−16 DFN−18 PIN SYMBOL FUNCTION
1 15 1 BOOST The BOOST pin provides additional drive voltage to the on−chip NPN power transist-
or. The resulting decrease in switch on voltage increases efficiency.
2 16 2, 3, 4 V
IN
This pin is the main power input to the IC.
3 1 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 2 8 SHDNB Shutdown_bar input. This is an active−low logical input, TTL compatible, with an in-
ternal 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.
5 7 10 SYNC This pin provides the synchronization input.
6 8 13 GND Power return connection for the IC.
7 9 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 ampere. These features protect the IC under severe overcurrent or short cir-
cuit conditions.
8 10 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.
− 3 − 6,
11 − 14
9, 11, 12,
14, 15, 18
NC No Connection
SYNCSHDNB
18
GNDV
SW
V
FB
V
IN
V
C
BOOST
PIN CONNECTIONS
1
16
V
FB
GND
V
C
SYNC
NC
NC
NC
NC
NCNC
NCNC
BOOSTSHDNB
V
IN
V
SW
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
SO−8
SO−16W EP
18−Lead DFN
Note: DFN exposed pad may be soldered to a
heat spreader for enhanced thermal perform-
ance. The exposed pad may be connected to
GND; do not connect to any other potential.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

NCV51411PWR2G

Mfr. #:
Buy NCV51411PWR2G
Manufacturer:
ON Semiconductor
Description:
Switching Voltage Regulators 1.5A Low Voltage Buck
Lifecycle:
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