NCV890101 Datasheet PDF - ON Semiconductor
| Part Number | NCV890101 | |
| Description | 2MHz Automotive Buck Switching Regulator | |
| Manufacturers | ON Semiconductor | |
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NCV890101
1.2A, 2MHz Automotive
Buck Switching Regulator
The NCV890101 is a fixed−frequency, monolithic, Buck switching
regulator intended for Automotive, battery−connected 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 NCV890101 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. Two
pins are provided to synchronize switching to a clock, or to another
NCV890101. The NCV890101 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.
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MARKING DIAGRAM
DFN10
CASE 485C
V8901
01
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Device
(*Note: Microdot may be in either location)
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
• Auto−synchronizes with Other NCV890101 or to an
External Clock
• 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)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
• Low Shutdown Current
• Wettable Flanks − DFN
• 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
Applications
• Audio
• Infotainment
• Safety − Vision Systems
• Instrumentation
VIN
CIN
SYNC
OUT
EN
CDRV
NCV890101
DBST
1 VIN
SW 10
2 DRV
BST 9
3 SYNCO SYNCI 8
CBST
SYNC IN
L1
DFW
RFB1
4 GND
FB 7
5 EN
COMP 6
RCOMP
CCOMP
VOUT
COUT
RFB2
Figure 1. Typical Application
© Semiconductor Components Industries, LLC, 2013
February, 2013 − Rev. 1
1
Publication Order Number:
NCV890101/D
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NCV890101
ELECTRICAL CHARACTERISTICS (VIN = 4.5 V to 28 V, VEN = 5 V, VBST = VSW + 3.0 V, CDRV = 0.1 mF, Min/Max values are valid
for the temperature range −40°C ≤ TJ ≤ 150°C unless noted otherwise, and are guaranteed by test, design or statistical correlation.)
Parameter
Symbol
Conditions
Min Typ Max Unit
QUIESCENT CURRENT
Quiescent Current, shutdown
Quiescent Current, enabled
UNDERVOLTAGE LOCKOUT − VIN (UVLO)
IqSD
IqEN
VIN = 13.2 V, VEN = 0 V, TJ = 25°C
VIN = 13.2 V
5 mA
3 mA
UVLO Start Threshold
UVLO Stop Threshold
UVLO Hysteresis
ENABLE (EN)
VUVLSTT
VIN rising
4.1 4.5 V
VUVLSTP
VIN falling
3.9
4.4 V
VUVLOHY
0.1 0.2 V
Logic Low
Logic High
Input Current
SOFT−START (SS)
VENLO
VENHI
IEN
0.8 V
2V
8 30 mA
Soft−Start Completion Time
VOLTAGE REFERENCE
tSS
0.8 1.4 2.0 ms
FB Pin Voltage during regulation
ERROR AMPLIFIER
VFBR
COMP shorted to FB
0.786 0.8 0.814
V
FB Bias Current
Transconductance
Output Resistance
COMP Source Current Limit
COMP Sink Current Limit
Minimum COMP voltage
OSCILLATOR
IFBBIAS
gm
gm(HV)
ROUT
ISOURCE
ISINK
VCMPMIN
VFB = 0.8 V
VCOMP = 1.3 V
4.5 V < VIN < 18 V
20 V < VIN < 28 V
VFB = 0.63 V, VCOMP = 1.3 V
4.5 V < VIN < 18 V
20 V < VIN < 28 V
VFB = 0.97 V, VCOMP = 1.3 V
4.5 V < VIN < 18 V
20 V < VIN < 28 V
VFB = 0.97 V
0.25 1 mA
mmho
0.6 1 1.5
0.3 0.5 0.75
1.4 MW
mA
75
40
mA
75
40
0.2 0.7 V
Frequency
FSW
FSW(HV)
4.5 < VIN < 18 V
20 V < VIN < 28 V
1.8 2.0 2.2 MHz
0.9 1.0 1.1
VIN FREQUENCY FOLDBACK MONITOR
Frequency Foldback Threshold
VIN rising
VIN falling
VFLDUP
VFLDDN
Frequency Foldback Hysteresis
VFLDHY
1. Not tested in production. Limits are guaranteed by design.
VFB = 0.63 V
18.4 20
18 19.8
0.2 0.3 0.4
V
V
http://onsemi.com
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| Information | Total 15 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ NCV890101.PDF Datasheet ] | |
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