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PDF NCV890100 Data sheet ( Hoja de datos )

Número de pieza NCV890100
Descripción 2MHz Automotive Buck Switching Regulator
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NCV890100
1.2A, 2MHz Automotive
Buck Switching Regulator
The NCV890100 is a fixedfrequency, monolithic, Buck switching
regulator intended for Automotive, batteryconnected applications
that must operate with up to a 36V input supply. The regulator is
suitable for systems with low noise and small form factor
requirements often encountered in automotive driver information
systems. The NCV890100 is capable of converting the typical 4.5 V to
18 V automotive input voltage range to outputs as low as 3.3 V at a
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MARKING
DIAGRAMS
constant switching frequency above the sensitive AM band,
eliminating the need for costly filters and EMI countermeasures. The
NCV890100 also provides several protection features expected in
Automotive power supply systems such as current limit, short circuit
protection, and thermal shutdown. In addition, the high switching
frequency produces low output voltage ripple even when using small
V8901
DFN8
00
CASE 506BY
ALYWG
1G
8
inductor values and an allceramic output filter capacitor forming a
spaceefficient switching regulator solution.
Features
Internal NChannel Power Switch
8
1
SOIC8 EP
CASE 751AC
NCV890100
ALYWX
G
1
Low VIN Operation Down to 4.5 V
High VIN Operation to 36 V
Withstands Load Dump to 40 V
2 MHz Freerunning Switching Frequency
Logic level Enable Input Can be Directly Tied to Battery
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = PbFree Device
(*Note: Microdot may be in either location)
1.4 A (min) CyclebyCycle Peak Current Limit
Short Circuit Protection enhanced by Frequency Foldback
±1.75% Output Voltage Tolerance
Output Voltage Adjustable Down to 0.8 V
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
1.4 Millisecond Internal SoftStart
Thermal Shutdown (TSD)
These Devices are PbFree and are RoHS Compliant
Low Shutdown Current
Applications
Wettable Flanks DFN
Audio
NCV Prefix for Automotive and Other Applications
Infotainment
Requiring Unique Site and Control Change
Requirements; AECQ100 Qualified and PPAP
Capable
Safety Vision Systems
Instrumentation
© Semiconductor Components Industries, LLC, 2013
February, 2013 Rev. 2
1
Publication Order Number:
NCV890100/D

1 page




NCV890100 pdf
NCV890100
VIN
DRV
GND
EN
1
2
3
4
8 SW
7 BST
6 FB
5 COMP
VIN
DRV
GND
EN
1
2
3
4
(Top View)
Figure 3. Pin Connections
(Top View)
8
SW
7
BST
6
FB
5
COMP
PIN FUNCTION DESCRIPTIONS
Pin No.
Symbol
Description
1 VIN Input voltage from battery. Place an input filter capacitor in close proximity to this pin.
2
DRV
Output voltage to provide a regulated voltage to the Power Switch gate driver.
3
GND
Battery return, and output voltage ground reference.
4 EN This TTL compatible Enable input allows the direct connection of Battery as the enable signal. Grounding
this input stops switching and reduces quiescent current draw to a minimum.
5
COMP
Error Amplifier output, for tailoring transient response with external compensation components.
6 FB Feedback input pin to program output voltage, and detect precharged or shorted output conditions.
7 BST Bootstrap input provides drive voltage higher than VIN to the Nchannel Power Switch for optimum
switch RDS(on) and highest efficiency.
8 SW Switching node of the Regulator. Connect the output inductor and cathode of the freewheeling diode to
this pin.
Exposed
Pad
Connect to Pin 3 (electrical ground) and to a low thermal resistance path to the ambient temperature
environment.
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5

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NCV890100 arduino
NCV890100
TYPICAL CHARACTERISTICS CURVES
3.1
3.0
2.9 VDRVSTT
2.8
VDRVSTP
2.7
2.6
2.5
50 25 0
25 50 75 100 125 150
TJ. JUNCTION TEMPERATURE (°C)
Figure 22. DRV Reset Threshold vs. Junction
Temperature
30
29
28
27
26
25
24
23
22
21
50
25 0 25 50 75 100 125 150
TJ. JUNCTION TEMPERATURE (°C)
Figure 23. DRV Current Limit vs. Junction
Temperature
55
50
45
40
35
30
25
2050
25 0 25 50 75 100 125
TJ. JUNCTION TEMPERATURE (°C)
Figure 24. Output Precharge Detector
Threshold vs. Junction Temperature
150
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