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NCV890104 데이터시트 PDF




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부품번호 NCV890104 기능
기능 2MHz Automotive Buck Switching Regulator
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NCV890104 데이터시트, 핀배열, 회로
NCV890104
1.2 A, 2 MHz Automotive
Buck Switching Regulator
with Programmable Spread
Spectrum and Adjustable
RSTB
www.onsemi.com
The NCV890104 is a fixed−frequency, monolithic, Buck switching
regulator intended for Automotive, battery−connected applications
that must operate with up to a 36 V input supply. The regulator is
suitable for systems with low noise and small form factor
requirements often encountered in automotive driver information
systems. The NCV890104 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 constant switching frequency above the sensitive AM band,
eliminating the need for costly filters and EMI countermeasures.
A Reset pin signals when the output is in regulation, and a pin is
provided to adjust the delay before the RSTB signal goes high.
The NCV890104 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
inductor values and an all−ceramic output filter capacitor − forming
a space−efficient switching regulator solution.
MARKING DIAGRAM
1
DFN12
CASE 506CE
V8901
04
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Device
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
Features
Internal N−Channel Power Switch
Low VIN Operation Down to 4.5 V
High VIN Operation to 36 V
Withstands Load Dump to 40 V
2 MHz Free−running Switching Frequency
Adjustable Spread Spectrum
Reset with Adjustable Delay
Logic level Enable Input Can be Directly Tied to
Battery
1.4 A (min) Cycle−by−Cycle Peak Current Limit
Short Circuit Protection enhanced by Frequency
Foldback
±1.75% Output Voltage Tolerance
Output Voltage Adjustable Down to 0.8 V
1.4 Millisecond Internal Soft−Start
Thermal Shutdown (TSD)
Low Shutdown Current
NCV Prefix for Automotive and Other Applications
Requiring Unique Site and Control Change
Requirements; AEC−Q100 Qualified and PPAP
Capable
Wettable Flanks DFN (pin edge plating)
These Devices are Pb−Free and RoHS Compliant
Applications
Audio
Infotainment
Safety − Vision Systems
Instrumentation
© Semiconductor Components Industries, LLC, 2014
November, 2014 − Rev. 2
1
Publication Order Number:
NCV890104/D




NCV890104 pdf, 반도체, 판매, 대치품
NCV890104
VIN 1
DRV 2
RSTB 3
GND 4
EN 5
RDEPTH 6
12 SW
11 BST
10 DELAY
9 FB
8 COMP
7 RMOD
(Top View)
Figure 3. Pin Connections
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
RSTB
RSTB open drain output. Goes high impedance when the output is above 94% of its regulation level,
after the delay set by the DELAY pin times out. Goes low when the output is below 92% of its
regulation level (sensed on the FB signal)
4
GND
Battery return, and output voltage ground reference.
5 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.
6
RDEPTH
Modulation depth adjustment for spread spectrum. Set with a resistor to GND.
7
RMOD
Modulation frequency adjustment for spread spectrum. Set with a resistor to GND.
8
COMP
Error Amplifier output, for tailoring transient response with external compensation components.
9 FB Feedback input pin to program output voltage, and detect pre−charged or shorted output conditions.
10
DELAY
Delay adjust input. Connecting an external capacitor adjusts the delay for the RSTB function.
11 BST Bootstrap input provides drive voltage higher than VIN to the N−channel Power Switch for optimum
switch RDS(on) and highest efficiency.
12 SW Switching node of the Regulator. Connect the output inductor and cathode of the freewheeling diode
to this pin.
Exposed
Pad
Connect to Pin 4 (electrical ground) and to a low thermal resistance path to the ambient temperature
environment.
www.onsemi.com
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NCV890104 전자부품, 판매, 대치품
NCV890104
TYPICAL CHARACTERISTICS CURVES
8
VIN = 13.2 V
7
6
5
4
3
2
1
0
−50 −25 0
25 50 75 100 125 150
TJ. JUNCTION TEMPERATURE (°C)
Figure 4. Shutdown Quiescent Current vs.
Junction Temperature
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
3.9
−50 −25 0 25 50 75 100 125 150
TJ. JUNCTION TEMPERATURE (°C)
Figure 6. UVLO Start Threshold vs. Junction
Temperature
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
−50 −25 0
25 50 75 100 125 150
TJ. JUNCTION TEMPERATURE (°C)
Figure 8. Soft−Start Duration vs. Junction
Temperature
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
−50 −25 0
25 50 75 100 125 150
TJ. JUNCTION TEMPERATURE (°C)
Figure 5. Enabled Quiescent Current vs.
Junction Temperature
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
−50 0
50 100 150
TJ. JUNCTION TEMPERATURE (°C)
Figure 7. UVLO Stop Threshold vs. Junction
Temperature
0.85
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
−50 −25 0
25 50 75 100 125 150
TJ. JUNCTION TEMPERATURE (°C)
Figure 9. FB Regulation Voltage vs. Junction
Temperature
www.onsemi.com
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