NCV6356
Configurable 5.0 A AOT
Step Down Converter
Description
The NCV6356 is a synchronous AOT (Adaptive On−time) buck
converter optimized to supply the different sub systems of automotive
applications post regulation system up to 5 V input. The device is able
to deliver up to 5.0 A, with programmable output voltage from 0.6 V
to 1.4 V. Operation at up to 2.4 MHz switching frequency allows the
use of small components. Synchronous rectification and automatic
PFM Pseudo−PWM (PPWM) transitions improve overall solution
efficiency. The NCV6356 is in low profile 3.0 x 4.0 mm DFN−14
package.
Features
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WDFNW14 4x3, 0.5P
CASE 511CM
•
Input Voltage Range from 2.5 V to 5.5 V : Battery, 3.3 V and 5.0 V
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Rail Powered Applications
Power Capability : 3.0 A Ta = 105°C
−
5.0 A Ta = 85°C
Programmable Output Voltage : 0.6 V to 1.4 V in 6.25 mV Steps
Up to 2.4 MHz Switching Frequency with On Chip Oscillator
Uses 330 nH Inductor and at least 22
mF
Capacitors for Optimized
Footprint and Solution Thickness
PFM/PPWM Operation for Optimum Efficiency
Low 60
mA
Quiescent Current
I
2
C Control Interface with Interrupt and Dynamic Voltage Scaling
Support
Enable / VSEL Pins, Power Good / Interrupt Signaling
Thermal Protections and Temperature Management
Transient Load Helper: Share the Same Rail with Another Rail
3.0 x 4.0 mm / 0.5 mm Pitch DFN 14 Package
AEC−Q100 Qualified and PPAP Capable
Snap Dragon
Automotive POL
Instrumentation, Clusters
Infotainment
ADAS System (Vision, Radar)
MARKING DIAGRAM
6356
xx
AYWW
G
6356
xx
= Specific Device Code
= C: 1.150 V / 1.150 V
= B: 1.200 V / 1.200 V
= Q: 0.875 V / 0.906 V
= Assembly Location
= Year
= Work Week
= Pb−Free Package*
A
Y
WW
G
(Note: Microdot may be in either location)
Typical Applications
(Top View)
14−Pin 0.50 mm pitch DFN
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 32 of this data sheet.
©
Semiconductor Components Industries, LLC, 2017
March, 2018
−
Rev. 0
1
Publication Order Number:
NCV6356/D
NCV6356
Supply Input
4
.7uF
AVIN
AGND
Core
Thermal
Protection
Enable Control
EN
Input
VSEL
Voltage Selection
DCDC
5A
Operating
Mode
Control
Modular
Driver
SW
330 nH
2x 22uF
PGND
FB
Sense
NCV6356
PVIN
10uF
Supply Input
Interrupt PGND
INTB
SDA
Output
Monitoring
DCDC
2.4MHz
Controller
Processor I@
C
Control InterfaceSCL
I@
C
Processor
Core
Figure 1. Typical Application Circuit
PVIN
POWER INPUT
PVIN
SUPPLY INPUT
AVIN
ANALOG GROUND
AGND
Core
Thermal
Protection
Output Voltage
Monitoring
5.0 A
DC-DC
SW
SW
SW
SWITCH NODE
ENABLE CONTROL INPUT
EN
VOLTAGE SELECTION
VS EL
Operating
Mode Control
Up to 2.4 MHz
DC−DC converter
Controller
PGND
POWER GROUND
PGND
VOUT
FEEDBACK
2
PROCESSOR I C
CONTROL INTERFACE
SCL
INTB
SDA
Logic Control
Interrupt
I2C
Sense
Figure 2. Simplified Block Diagram
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NCV6356
Figure 3. Pin Out (Top View)
Table 1. PIN FUNCTION DESCRIPTION
Pin
4
15
Name
AVIN
AGND
Type
Analog Input
Analog Ground
Description
Analog Supply.
This pin is the device analog and digital supply. Could be connected di-
rectly to the VIN plane with a dedicated 4.7
mF
ceramic capacitor. Must be equal to PVIN
Analog Ground.
Analog and digital modules ground. Must be connected to the system
ground.
Enable Control.
Active high will enable the part. There is an internal pull down resistor on
this pin.
Output voltage
/
Mode Selection.
The level determines which of two programmable con-
figurations to utilize (operating mode / output voltage). There is an internal pull down resis-
tor on this pin; could be left open if not used.
Interrupt
open drain output. Must be connected to the ground plane if not used.
I
2
C interface
Clock
line. There is an internal pull down resistor on this pin; could be left
open if not used
I
2
C interface Bi−directional
Data
line. There is an internal pull down resistor on this pin;
could be left open if not used
Switch Supply.
These pins must be decoupled to ground by at least a 10
mF
ceramic
capacitor. It should be placed as close as possible to these pins. All pins must be used
with short heavy connections. Must be equal to AVIN
Switch Node.
These pins supply drive power to the inductor. Typical application uses
0.33
mH
inductor; refer to application section for more information.
All pins must be used with short heavy connections.
Switch Ground.
This pin is the power ground and carries the high switching current. High
quality ground must be provided to prevent noise spikes. To avoid high−density current
flow in a limited PCB track, a local ground plane that connects all PGND pins together is
recommended. Analog and power grounds should only be connected together in one loca-
tion with a trace.
Feedback Voltage Input.
Must be connected to the output capacitor positive terminal with
a trace, not to a plane. This is the positive input to the error amplifier.
REFERENCE
CONTROL AND SERIAL INTERFACE
14
13
EN
VSEL
Digital Input
Digital Input
3
1
12
INTB
SCL
SDA
Digital Output
Digital Input
Digital
Input/Output
Power Input
DC to DC CONVERTER
8, 9
PVIN
5, 6, 7
SW
Power Output
10, 11
PGND
Power Ground
2
VOUT
Analog Input
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NCV6356
Table 2. MAXIMUM RATINGS
Rating
Analog and power pins (Note 1):
AVIN, PVIN, SW, INTB, VOUT, DC non switching
PVIN−PGND pins, transient 3 ns – 2.4 MHz
I
2
C pins: SDA, SCL
Digital pins : EN, VSEL
Input Voltage
Input Current
Human Body Model (HBM) ESD Rating (Note 2)
Charged Device Model (CDM) ESD Rating (Note 2)
Latch Up Current: (Note 3)
Digital Pins
All Other Pins
Storage Temperature Range
Maximum Junction Temperature
Moisture Sensitivity (Note 4)
Symbol
V
A
−0.3
to +6.0
−0.3
to +7.5
V
I
2
C
V
DG
I
DG
ESD HBM
ESD CDM
I
LU
100
100
T
STG
T
JMAX
MSL
−65
to +150
−40
to +150
Level 1
mA
−0.3
to +6.0
−0.3
to V
A
+0.3
≤
6.0
10
2500
1000
V
V
mA
V
V
Value
Unit
V
°C
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Refer to ELECTRICAL CHARACTERISTICS, RECOMMENDED OPERATING RANGES and/or APPLICATION INFORMATION for Safe
Operating parameters.
2. This device series contains ESD protection and passes the following ratings:
Human Body Model (HBM)
±
2.5 kV per JEDEC standard: JESD22*A114.
Charged Device Model (CDM)
±
1.0 kV per JEDEC standard: JESD22−C101 Class IV
3. Latch up Current per JEDEC standard: JESD78 class II.
4. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.
Table 3. OPERATING CONDITIONS
Symbol
AV
IN,
PV
IN
T
J
R
qJA
P
D
Power Supply
Junction Temperature Range (Note 6)
Thermal Resistance Junction to Ambient (Note 7)
Power Dissipation Rating (Note 8)
DFN−14 on Demo−board
T
A
≤
105°C,
R
qJA
= 30°C/W
T
A
≤
85°C
R
qJA
= 30°C/W
T
A
= 65°C
R
qJA
= 30°C/W
L
Co
Cin
Inductor for DC to DC converter (Note 5)
Output Capacitor for DC to DC Converter (Note 5)
Input Capacitor for DC to DC Converter (Note 5)
Per 1.0 A of I
OUT
Parameter
Conditions
AV
IN =
PV
IN
Min
2.5
−40
−
−
−
−
0.15
15
6.0
25
30
666
1333
2000
0.33
−
10.0
Typ
Max
5.5
+125
−
−
−
−
0.47
200
−
Unit
V
°C
°C/W
mW
mW
mW
mH
mF
mF
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
5. Including de−ratings (Refer to the Application Information section of this document for further details)
6. The thermal shutdown set to 150°C (typical) avoids potential irreversible damage on the device due to power dissipation
7. The R
qJA
is dependent of the PCB heat dissipation. Board used to drive this data was a NCV6356EVB board. It is a multilayer board with
1−once internal power and ground planes and 2−once copper traces on top and bottom of the board
8. The maximum power dissipation (PD) is dependent on input voltage, maximum output current, pcb stack up and layout, and external
components selected.
R
qJA
+
125
*
T
A
, by taking R
qJA
+
30
o
C
P
D
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NCV6356
Table 4. ELECTRICAL CHARACTERISTICS
(Note 9)
Min and Max Limits apply for T
J
=
−40°C
to +125°C, AVIN = PVIN = 3.3 V and default configuration, unless otherwise specified.
Typical values are referenced to T
A
= + 25°C, AVIN = PVIN = 3.3 V and default configuration, unless otherwise specified.
Symbol
I
Q−PPWM
I
Q PFM
I
SLEEP
I
OFF
Parameter
Operating quiescent current PPWM
Operating quiescent current PFM
Product sleep mode current
Product in off mode
Conditions
DCDC active in Forced PPWM
no load
DCDC active in Auto mode
no load – minimal switching
Product in sleep mode
V
IN
= 5.5 V, T
J
up to 85°C
EN, VSEL and Sleep_Mode low,
No I
2
C pull up
V
IN
= 5.5 V, T
J
up to 85°C
Min
−
−
−
−
Typ
22
60
5
0.8
Max
25
90
10
3
Unit
mA
mA
mA
mA
Supply Current: Pins AVIN – PVINx
DC to DC Converter
PV
IN
I
OUT
Input Voltage Range
Load Current Range
NCV6356B and NCV6356C
(Note 11, 12)
Ipeak[1..0] = 00
Ipeak[1..0] = 01
Ipeak[1..0] = 10
Ipeak[1..0] = 11
NCV6356Q (Note 11, 12)
Ipeak[1..0] = 00
Ipeak[1..0] = 01
Ipeak[1..0] = 10
Ipeak[1..0] = 11
D
VOUT
Output Voltage DC Error
Forced PPWM mode, V
IN
range,
No load
Forced PPWM mode, V
IN
range,
I
OUT
up to I
OUTMAX
(Note 11)
Auto mode, V
IN
range,
I
OUT
up to I
OUTMAX
(Note 11)
F
SW
R
ONHS
R
ONLS
I
PK
Switching Frequency
P−Channel MOSFET On Resistance
N−Channel MOSFET On Resistance
Peak Inductor Current
From PVIN to SW
V
IN
= 5.0 V
From SW to PGND
V
IN
= 5.0 V
NCV6356B and NCV6356C
Open loop
−
Ipeak[1..0] = 00
Open loop
−
Ipeak[1..0] = 01
Open loop
−
Ipeak[1..0] = 10
Open loop
−
Ipeak[1..0] = 11
NCV6356QM
Open loop
−
Ipeak[1..0] = 00
Open loop
−
Ipeak[1..0] = 01
Open loop
−
Ipeak[1..0] = 10
Open loop
−
Ipeak[1..0] = 11
DC
LOAD
DC
LINE
Load Regulation
Line Regulation
I
OUT
from 0 A to I
OUTMAX
(Note 11)
Forced PPWM mode
2.5 V
≤
V
IN
≤
5.5 V
Forced PPWM mode
2.5
−
5.5
V
A
0
0
0
0
0
0
0
0
−1.5
−2
−3
2.16
−
−
−
−
−
−
−
−
−
−
−
−
−
2.4
38
29
3.5
4.0
4.5
5.0
5.3
5.8
6.3
6.8
1.5
2
2
2.64
50
40
MHz
mW
mW
A
4.6
5.2
5.6
6.2
6.4
7.2
7.6
8.4
−
−
5.2
5.8
6.2
6.8
7.0
7.8
8.2
9.0
5
6
5.8
6.4
6.8
7.4
7.7
8.4
8.8
9.6
−
−
mV
mV
%
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