NCV8853
Automotive Grade
Non-Synchronous Buck
Controller
The NCV8853 is an adjustable−output non−synchronous buck
controller which drives an external P−channel MOSFET. The device
uses peak current mode control with internal slope compensation. The
IC incorporates an internal regulator that supplies charge to the gate
driver.
Protection features include internal soft−start, undervoltage lockout,
cycle−by−cycle current limit, hiccup−mode overcurrent protection,
hiccup−mode short−circuit protection.
Additional features include: power good signal, low quiescent
current sleep mode and externally synchronizable switching
frequency.
Features
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MARKING
DIAGRAM
8
8
1
SOIC−8
SUFFIX D
CASE 751
1
V8853xx = Specific Device Code
x = 00, 01
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb−Free Package
V8853xx
ALYW
G
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Ultra Low Iq Sleep Mode
Adjustable Output with 800 mV
±2.0%
Reference Voltage
Wide Input of 3.1 to 44 V with Undervoltage Lockout (UVLO)
Power Good (PG)
Internal Soft−Start (SS)
Fixed−Frequency Peak Current Mode Control
Internal Slope Compensating Artificial Ramp
Internal High−Side PMOS Gate Driver
Regulated Gate Driver Current Source
External Frequency Synchronization (SYNC)
Programmable Cycle−by−Cycle Current Limit (CL)
Hiccup Overcurrent Protection (OCP)
Output Short Circuit Hiccup Protection (SCP)
Space−Saving 8−PIN SOIC Package
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
PINOUT DIAGRAM
1 PG
2 EN/SYNC
3 COMP
4 FB
VIN 8
ISNS 7
GDRV 6
GND 5
ORDERING INFORMATION
Device
NCV885300D1R2G
NCV885301D1R2G
Package
Shipping
†
SOIC−8 2500/Tape & Reel
(Pb−Free)
SOIC−8 2500/Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
©
Semiconductor Components Industries, LLC, 2016
1
October, 2016 − Rev. 5
Publication Order Number:
NCV8853/D
NCV8853
VIN
PG
EN/SYNC
EN/SYNC
COMP
FB
VIN
ISNS
GDRV
GND
VO
Figure 1. NCV8853 Application Diagram
8
UVLO
OCP
EN/SYNC
2
FAULT
LOGIC
OSC
1
SCP
+
PWM
CLAMP
PG
SS
COMP 3
VEA
VREF
5
GND
4
FB
CL
CSA
7
ISNS
VIN
DRIVE
LOGIC
6
GDRV
PG
Figure 2. NCV8853 Simple Block Diagram
PIN DESCRIPTIONS
No
1
2
3
4
5
6
7
8
Pin Symbol
PG
EN/SYNC
COMP
FB
GND
GDRV
ISNS
VIN
Function
Power good output. Use a pull−up resistor to 5.0 V. PG is pulled low when power is not good.
Enable and synchronization input. The falling edge synchronizes the internal oscillator. The part is disabled
into sleep mode when this pin is brought low for longer than the enable time−out period.
Output of the voltage error amplifier. An external compensator network from COMP to GND is used to sta-
bilize the converter and tailor transient performance.
Output voltage feedback. A resistor from the output voltage to FB with another resistor from FB to GND
creates a voltage divider for regulation and programming of the output voltage.
Ground reference.
Gate driver output. Connect to gate of the external P−channel MOSFET. A series resistance can be added
from GDRV to the gate to tailor EMC performance.
Current sense input. Connect this pin to the source of the external P−channel MOSFET, through a current−
sense resistor to VIN to sense the switching current for regulation and current limiting.
Main power input for the IC.
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2
NCV8853
MAXIMUM RATINGS
(Voltages are with respect to GND unless otherwise indicated.)
Rating
DC Voltage (VIN, ISNS, GDRV)
Peak Transient Voltage (Load Dump on VIN)
DC Voltage (EN/SYNC, PG)
DC Voltage (COMP, FB)
DC Voltage Stress (VIN − GDRV)
Operating Junction Temperature Range
Storage Temperature Range
Peak Reflow Soldering Temperature: Pb−Free 60 to 150 seconds at 217°C
Value
−0.3 to 44
44
−0.3 to 6.0
−0.3 to 3.6
−0.7 to 12
−40 to 150
−65 to 150
265
Unit
V
V
V
V
V
°C
°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.
PACKAGE ATTRIBUTES
Characteristic
ESD Capability
Human Body Model
Machine Model
Charge Device Model
Moisture Sensitivity Level
Package Thermal Resistance
Junction–to–Ambient, R
qJA
Value
2.0 kV
200 V
>1.0 kV
MSL 1 260°C
100°C/W
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3
NCV8853
ELECTRICAL CHARACTERISTICS
(V
IN
= 3.4 V to 36 V, EN = 5 V. Min/Max values are valid for the temperature range
−40°C
≤
T
J
≤
150°C unless noted otherwise, and are guaranteed by test, design or statistical correlation.)
Characteristic
GENERAL
Quiescent Current
I
q,sleep
I
q,off
I
q,on
Undervoltage Lockout
Undervoltage Lockout
Hysteresis
Overvoltage Lockout
OSCILLATOR
Switching Frequency
Slope Compensation
Minimum On Time
Max Duty Cycle − Switching
Max Duty Cycle
Soft−Start Time
Soft−Start Delay
EN/SYNC
Low Threshold
High Threshold
Input Current
SYNC Frequency Range
SYNC Delay
SYNC Duty Cycle
Disable Delay Time
POWER GOOD
Rising Threshold
Falling Threshold
Power Good Pulldown
VOLTAGE ERROR AMP
DC Gain
Gain−Bandwidth Product
FB Bias Current
Charge Currents
A
v
G
BW
I
vfb,bias
I
src,vea
I
snk,vea
Reference Voltage
High Saturation Voltage
Low Saturation Voltage
CURRENT SENSE AMP
Common−Mode Range
Differential Mode Range
Amplifier Gain
CMR
DMR
A
csa
3.1
300
2.0
40
V
mV
V/V
V
ref
V
c,max
V
c,min
Source, V
FB
= 0.9 V, V
COMP
= 1.2 V
Sink, V
FB
= 0.7 V, V
COMP
= 1.2 V
1.2
0.5
784
2.2
55
1.7
80
2.4
0.1
1.8
0.8
800
2.3
0.001
0.3
91
3.1
1.0
2.5
1.0
816
mV
V
V
dB
MHz
mA
mA
PG
rise
PG
fall
V
pg
% of V
ref
% of V
ref
87
90
90
93
93
96
0.40
%
%
V
V
s,il
V
s,ih
I
sync
f
sync
t
s,dly
D
sync
t
en
% of f
SW
Relative to Nominal Switching Frequency
From SYNC falling edge to GDRV falling edge
25
300
80
50
2.0
5.0
10
300
100
75
0.8
V
V
mA
%
ns
%
%
f
SW
m
a
t
onmin
D
max,sw
D
max
t
ss
t
ss,dlly
1.0
200
Maximum duty cycle when switching
90
306
340
51
110
93
100
1.5
300
2.0
400
140
374
kHz
mV/ms
ns
%
%
ms
ms
V
uvlo
V
uvlo,hys
V
ovlo
V
IN
= 13.2 V, EN = 0 V, Sleep Mode
V
IN
= 13.2 V, EN = 5 V or toggled, V
FB
= 1 V,
No Switching
V
IN
= 13.2 V, EN = 5 V or toggled, V
FB
= 0 V,
Switching
V
IN
decreasing
2.9
50
36.9
2.5
2.0
3.0
3.1
150
38
6.0
3.0
5.0
3.3
300
39.3
mA
mA
mA
V
mV
V
Symbol
Conditions
Min
Typ
Max
Unit
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4
NCV8853
ELECTRICAL CHARACTERISTICS
(V
IN
= 3.4 V to 36 V, EN = 5 V. Min/Max values are valid for the temperature range
−40°C
≤
T
J
≤
150°C unless noted otherwise, and are guaranteed by test, design or statistical correlation.)
Characteristic
CURRENT SENSE AMP
Input Bias Current
I
sns,bias
NCV885300
NCV885301
30
70
50
120
mA
Symbol
Conditions
Min
Typ
Max
Unit
CURRENT LIMIT / OVER CURRENT PROTECTION
Cycle−by−Cycle Current
Limit Threshold
Cycle−by−Cycle Current
Limit Response Time
Over Current Protection
Threshold
Over Current Protection
Response Time
GATE DRIVERS
Leading Edge Blanking
Time
Gate Driver Pull Up Current
Gate Driver Pull Down
Current
Gate Driver Clamp Voltage
(V
IN
– V
GDRV
)
Power Switch Gate to
Source Voltage
SHORT CIRCUIT PROTECTION
Startup Blanking Time
Short−Circuit Threshold
Voltage
Hiccup Time
SC Response Time
THERMAL SHUTDOWN
Thermal Shutdown
Threshold
Thermal Shutdown
Hysteresis
Thermal Shutdown Delay
T
sd
T
sd,hys
t
tsd
T
J
rising
T
J
Shutdown – T
J
Startup
T
J
> Thermal Shutdown Threshold to stop
switching
160
10
170
15
180
20
200
°C
°C
ns
t
scp,dly
V
scp
t
hcp,dly
t
scp
From start of soft−start, % of soft−start time
% of Feedback Voltage (V
ref
)
% of Soft−Start Time
Switcher Running
105
65
70
135
60
200
300
75
%
%
%
ns
t
on,min
I
sink
I
src
V
drv
V
gs
V
IN
= 4 V
V
IN
− V
GDRV
= 4 V
V
IN
− V
GDRV
= 4 V
160
160
6.0
3.8
230
230
8.0
100
300
300
10
ns
mA
mA
V
V
V
cl
t
cl
V
ocp
t
ocp
% of V
cl
125
150
85
100
115
200
175
200
mV
nsec
%
ns
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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