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LTM4641 데이터시트 PDF




Linear Technology에서 제조한 전자 부품 LTM4641은 전자 산업 및 응용 분야에서
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부품번호 LTM4641 기능
기능 DC/DC uModule Regulator
제조업체 Linear Technology
로고 Linear Technology 로고


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LTM4641 데이터시트, 핀배열, 회로
Features
n Wide Operating Input Voltage Range: 4.5V to 38V
n 10A DC Typical, 12A Peak Output Current
n Output Range: 0.6V to 6V
n ±1.5% Maximum Total Output DC Voltage Error
n DifferentialRemoteSenseAmplifierforPOLRegulation
n Internal Temperature, Analog Indicator Output
n Overcurrent Foldback and Overtemperature
Protection
n Current Mode Control/Fast Transient Response
n Parallelable for Higher Output Current
n Selectable Pulse-Skipping Operation
n Soft-Start/Voltage Tracking/Pre-Bias Start-Up
n 15mm × 15mm × 5.01mm BGA Package
n SnPb or RoHS Compliant Finish
Input Protection
n UVLO, Overvoltage Shutdown and Latchoff Thresholds
n N-Channel Overvoltage Power-Interrupt MOSFET Driver
n Surge Stopper Capable with Few External Components
Load Protection
n Robust, Resettable Latchoff Overvoltage Protection
n N-Channel Overvoltage Crowbar Power MOSFET Driver
Applications
n Ruggedized Electronics
n Avionics and Industrial Equipment
LTM4641
38V, 10A DC/DC µModule
Regulator with Advanced
Input and Load Protection
Description
The LTM®4641 is a switch mode step-down DC/DC
µModule® (micromodule) regulator with advanced input
and load protection features. Trip detection thresholds for
the following faults are customizable: input undervoltage,
overtemperature, input overvoltage and output overvolt-
age. Select fault conditions can be set for latchoff or
hysteretic restart response—or disabled. Included in the
package are the switching controller and housekeeping ICs,
power MOSFETs, inductor, overvoltage drivers, biasing
circuitry and supporting components. Operating from input
voltages of 4V to 38V (4.5V start-up), the device supports
output voltages from 0.6V to 6V, set by an external resis-
tor network remote sensing the point-of-load’s voltage.
The LTM4641’s high efficiency design can deliver up to
10A continuous current with a few input and output ca-
pacitors. The regulator’s constant on-time current mode
control architecture enables high step-down ratios and
fast response to transient line and load changes. The
LTM4641 is offered in a 15mm × 15mm × 5.01mm with
SnPb or RoHS compliant terminal finish.
L, LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered
trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
5481178, 5847554, 6100678, 6304066, 6580258, 6677210, 8163643.
Click to view associated TechClip Videos.
Typical Application
µModule Regulator with Input Disconnect and Fast Crowbar Output Overvoltage Protection
4
VIN
4V TO 38V
4.5V START-UP
+
100µF
50V
MSP*
10µF
50V
×2
VING VINGP VINH
3
MTOP
SW
VINL
VOUT
2
750k
fSET
UVLO
INTVCC
DRVCC
RUN
LTM4641
CROWBAR
MBOT
VOSNS+
VOSNS–
GND
5.49k
5.49k
TRACK/SS
OVPGM
10nF
IOVRETRY OVLO FCB LATCH SGND
5.6M
1
MCB**
VOUT
1V
100µF 10A
×3
LOAD
4641 TA01a
SGND CONNECTS TO GND INTERNAL TO µMODULE REGULATOR
*MSP: (OPTIONAL) SERIES-PASS OVERVOLTAGE POWER INTERRUPT MOSFET, NXP PSMN014-60LS
**MCB: (OPTIONAL) OUTPUT OVERVOLTAGE CROWBAR MOSFET, NXP PH2625L
For more information www.linear.com/LTM4641
1V LSohaodrtP-rCoitreccutiet datfr3o8mVIMN TOP
SHORT-CIRCUIT APPLIED
VINL, VINH (25V/DIV)
CROWBAR (5V/DIV)
1.1VOUT PEAK
4
3
2
VOUT
(200mV/DIV)
4µs/DIV
TESTED AT WORST-CASE CONDITION: NO LOAD
1
4641 TA01b
4641fe
1




LTM4641 pdf, 반도체, 판매, 대치품
LTM4641
E lectrical Characteristics The l denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications
shown in Figure 45, unless otherwise noted.
are
at
TA
=
25°C
(Note
2).
VIN
=
VINH
=
VINL
=
28V,
per
the
typical
application
SYMBOL
VIN
VOUT
VOUT(DC)
Input Specifications
VRUN(ON,OFF)
IRUN(ON)
IRUN(OFF)
VINL(UVLO)
IINRUSH(VINH)
IQ(VINH)
IQ(VINL)
IS(VINH)
Output Specifications
IOUT(DC)
VOUT(LINE)/VOUT
VOUT(LOAD)/VOUT
VOUT(AC)
fS
VOUT(START)
tSTART
tRUN(ON-DELAY)
VOUT(LS)
tSETTLE(LS)
PARAMETER
Input DC Voltage
Output Voltage Range
Output Voltage, Total Variation with
Line and Load, and Prior to UVLO
RUN On/Off Threshold
RUN Pull-Up Current
RUN Pull-Down Current, Switching
Inhibited
VINL Undervoltage Lockout
Input Inrush Current Through VINH,
at Start-Up
Power Stage Bias Current (IVINH) at
No Load
Control Bias Current (IVINL)
Power Stage Input Current (IVINH) at
Full Load
Output Continuous Current Range
Line Regulation Accuracy
Load Regulation Accuracy
Output Voltage Ripple Amplitude
Output Voltage Ripple Frequency
Turn-On Overshoot
VIN-to-VOUT Start-Up Time
RUN-to-VOUT Turn-On Response
Time
Peak Deviation for Dynamic Load
Step
Settling Time for Dynamic Load Step
CONDITIONS
URseecoRmSmETe1nAd=eRdSinETT1aBb≤le81.2kΩ. RfSET Values
4V.I5NV=≤4VVI(NR≤am38pVe,d0DAo≤wnIOfUrTom≤ 140.5AV), IOUT = 0A
Run Rising, Turn On
Run Falling, Turn Off
VVRRUUNN
=
=
0V
3.3V
VRUN = 3.3V, UVLO = 0V (MHYST On)
VVIINNLL
Rising
Falling
Hysteresis
CSS = Open
IOUT = 0A and:
FCB ≥ 0.84V (Pulse-Skipping Mode)
FCB ≤ 0.76V (Forced Continuous Mode)
Shutdown, RUN = 0
INVTIVNC=C 2C8oVn,nIeOcUteTd=t0oADRVCC and:
VIN = 28V, IOUT = 10A
VIN = 28V, Shutdown, RUN = 0
IOUT = 10A and:
VIN = 4.5V
VVIINN
=
=
28V
38V
(Note 3)
VIN from 4.5V to 38V, IOUT = 0A
IOUT from 0A to 10A (Note 3)
IOUT = 0A
IIOOUUTT
=
=
0A
10A
IOUT = 0A
RUN Electrically Open Circuit, Time Between
Application of VIN to VOUT Becoming Regulated,
OVPGM = 1.5V, CTMR = CSS = Open
VIN Established, (TMR-Set POR Time Expired)
Time Between RUN Releasing from GND to
PGOOD Going Logic High, CSS = Open,
OVPGM = 1.5V
IOUT from 0A to 5A at 5A/µs
IOUT from 5A to 0A at 5A/µs
IOUT from 0A to 5A at 5A/µs
IOUT from 5A to 0A at 5A/µs
MIN TYP MAX
l 4.5
38
l 0.6
6
l 1.773 1.800 1.827
l 1.773 1.800 1.827
l
l 0.8
1.25
1.15
2
l –580 –520 –460
l –220 –165 –110
1
l 4.2 4.5
l 3.5 3.8
4
l 300 400
230
8
29
0.2
14.5
15.5
5
4.65
790
590
l0
l
l
10
0.02 0.15
0.04 0.15
16
290
330
10
3
175 400
40
40
20
20
UNITS
V
V
V
V
V
V
µA
µA
nA
V
V
mV
mA
mA
mA
mA
mA
mA
mA
A
mA
mA
A
%
%
mVP-P
kHz
kHz
mV
ms
μs
mV
mV
μs
µs
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4 For more information www.linear.com/LTM4641

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LTM4641 전자부품, 판매, 대치품
LTM4641
E lectrical Characteristics The l denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications
shown in Figure 45, unless otherwise noted.
are
at
TA
=
25°C
(Note
2).
VIN
=
VINH
=
VINL
=
28V,
per
the
typical
application
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
tUVOVD
UVLO/OVLO/IOVRETRY/ TEMP
Response Time
±50mV Overdrive (All Pins)
±5mV Overdrive, UVLO/OVLO/IOVRETRY Pins
Only (Note 4)
l
50
25 100
125 500
IUVOV
Input Current of UVLO, OVLO and
IOVRETRY
UVLO = 0.55V or OVLO = 0.45V or
IOVRETRY = 0.45V
l
±30
VHOUSEKEEPING(UVLO) Housekeeping Circuitry UVLO
VHYST(SWITCHING ON) HYST Voltage (MHYST Off, RUN
Logic High)
Voltage on INTVCC, INTVCC Rising (Note 4)
Hysteresis, INTVCC Returning (Note 4)
RUN Electrically Open Circuit
RUN = 1.8V
1.9 2 2.1
5 25 50
l 4.9 5.1 5.25
l 1.85 2.1 2.35
VHYST(SWITCHING OFF,
RUN)
VHYST(SWITCHING OFF,
FAULT)
HYST Voltage (MHYST Off, RUN
Logic Low)
HYST Voltage, Switching Action
Inhibited (MHYST On)
RUN = 0V
l 170 350 480
UVLO < UVOVTH or OVLO > UVOVTH or
IoOrVCRREOTWRYBA>RU>VOVVCRTHOWoBrATRE(MTHP)
<
or
OTTH(INCEPTION)
DRVCC < DRVCCUVLO(FALLING)
(See Figures 62, 63)
l
30 65
TMRUOTO
Timeout and Power-On Reset Period CTMR = 1nF, Time from Fault Clearing to HYST l 5
Being Released by Internal Circuitry
9 14
VLATCH(IH)
VLATCH(IL)
ILATCH
ITMR(UP)
ITMR(DOWN)
VTMR(DIS)
OTBHVIL
OTBHVZ
LATCH Clear Threshold Input High
LATCH Clear Threshold Input Low
LATCH Input Current
TMR Pull-Up Current
TMR Pull-Down Current
Timer Disable Voltage
OTBH Low Level Input Voltage
OTBH Pin Voltage When Left
Electrically Open Circuit
VLATCH = 7.5V
VTMR = 0V
VTMR = 1.6V
Referenced to INTVCC
–10μA ≤ IOTBH ≤ 10μA
l 1.2
l 0.8
l ±1
l –1.2 –2.1 –2.8
l 1.2 2.1 2.8
l –180 –270
l 0.4
l 0.6 0.9 1.2
IOTBH(MAX)
Maximum OTBH Current
OTBH Electrically Shorted to SGND
l
30
UNITS
µs
µs
nA
V
mV
V
V
mV
mV
ms
V
V
μA
μA
μA
mV
V
V
μA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
The LTM4641 SW absolute maximum rating of 40V is verified in ATE by
regulating VOUT while at 40VIN, in a controlled manner guaranteed to not
affect device reliability or lifetime. Static testing of SW leakage current at
40VIN is performed at control IC wafer level only.
Note 2: The LTM4641 is tested under pulsed load conditions such that
TJ ≈ TA. The LTM4641E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the
–40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LTM4641I is guaranteed over the –40°C to 125°C operating junction
temperature range. The LTM4641MP is tested and guaranteed over the
full –55°C to 125°C operating temperature range. Note that the maximum
ambient temperature consistent with these specifications is determined by
specific operating conditions in conjunction with board layout, the rated
package thermal impedance and other environmental factors.
Note 3: See output current derating curves for different VIN, VOUT and TA.
Note 4: 100% tested at wafer level only.
For more information www.linear.com/LTM4641
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