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LTM4601HV 데이터시트 PDF




Linear Technology에서 제조한 전자 부품 LTM4601HV은 전자 산업 및 응용 분야에서
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부품번호 LTM4601HV 기능
기능 DC/DC uModule Regulator
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LTM4601HV 데이터시트, 핀배열, 회로
LTM4601HV
12A 28VIN DC/DC µModule
Regulator with PLL, Output
Tracking and Margining
FEATURES
DESCRIPTION
n Complete Switch Mode Power Supply
n Wide Input Voltage Range: 4.5V to 28V
n 12A DC Typical, 14A Peak Output Current
n 0.6V to 5V Output Voltage
n Output Voltage Tracking and Margining
n Parallel Multiple µModule® Regulators for Current
Sharing
n Differential Remote Sensing for Precision Regulation
n PLL Frequency Synchronization
n ±1.5% Regulation
n Current Foldback Protection (Disabled at Start-Up)
n RoHS Compliant with Pb-Free Finish,
Gold Finish LGA (e4) or SAC 305 BGA (e1)
n Ultrafast Transient Response
n Current Mode Control
n Up to 95% Efficiency at 5VIN, 3.3VOUT
n Programmable Soft-Start
n Output Overvoltage Protection
n Small Footprint, Low Profile
(15mm × 15mm × 2.82mm) Surface Mount LGA and
(15mm × 15mm × 3.42mm) BGA Packages
APPLICATIONS
n Telecom and Networking Equipment
n Servers
n Industrial Equipment
n Point of Load Regulation
The LTM®4601HV is a complete 12A step-down switch
mode DC/DC power supply with onboard switching control-
ler, MOSFETs, inductor and all support components. The
µModule regulator is housed in small surface mount 15mm
× 15mm × 2.82mm LGA and 15mm × 15mm × 3.42mm
BGA packages. Operating over an input voltage range of
4.5V to 28V, the LTM4601HV supports an output voltage
range of 0.6V to 5V as well as output voltage tracking
and margining. The high efficiency design delivers 12A
continuous current (14A peak). Only bulk input and output
capacitors are needed to complete the design.
The low profile and light weight package easily mounts
in unused space on the back side of PC boards for high
density point of load regulation. The µModule regulator
can be synchronized with an external clock for reducing
undesirable frequency harmonics and allows PolyPhase®
operation for high load currents.
A high switching frequency and adaptive on-time current
mode architecture deliver a very fast transient response
to line and load changes without sacrificing stability. An
onboard differential remote sense amplifier can be used
to accurately regulate an output voltage independent of
load current.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase 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, 6580258, 6304066, 6476589, 6774611, 6677210.
TYPICAL APPLICATION
2.5V/12A Power Supply with 4.5V to 28V Input
VIN
4.5V TO 28V
CIN
CLOCK SYNC
TRACK/SS CONTROL
ON/OFF
R1
392k
VIN
PGOOD
PLLIN TRACK/SS
VOUT
VFB
RUN MARG0
COMP
INTVCC
LTM4601HV MARG1
VOUT_LCL
DRVCC
MPGM
DIFFVOUT
VOSNS+
VOSNS–
SGND PGND fSET
5% MARGIN
100pF
MARGIN
CONTROL
VOUT
2.5V
12A
COUT
RSET
19.1k
4601HV TA01a
Efficiency and Power Loss
vs Load Current
95
90 12VIN
85
80 24VIN
75 EFFICIENCY
6
5
4
70 3
65 24VIN
60
12VIN
2
55
POWER LOSS
1
50
45 0
0 2 4 6 8 10 12 14
LOAD CURRENT (A)
4601HV TA01b
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LTM4601HV pdf, 반도체, 판매, 대치품
LTM4601HV
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the –40°C to 85°C
temperature range
RSET = 40.2k.
(Note
2),
otherwise
specifications
are
at
TA
=
25°C,
VIN
=
12V,
per
typical
application
(front
page)
configuration,
SYMBOL
PARAMETER
CONDITIONS
MIN TYP
MAX UNITS
Remote Sense Amp (Note 3)
VOSNS+, VOSNS– Common Mode Input Voltage Range VIN = 12V, RUN > 2V
CM Range
0
INTVCC – 1
V
DIFFVOUT
Range
Output Voltage Range
VIN = 12V, DIFFVOUT Load = 100k
0
INTVCC – 1
V
VOS Input Offset Voltage Magnitude
AV Differential Gain
GBP Gain Bandwidth Product
1.25 mV
1 V/V
3 MHz
SR Slew Rate
2 V/µs
RIN
CMRR
Input Resistance
Common Mode Rejection Mode
VOSNS+ to GND
20 kW
100 dB
Control Stage
VFB
Error Amplifier Input Voltage
Accuracy
IOUT = 0A, VOUT = 1.5V
l 0.594 0.6
0.606
V
VRUN
ITRACK/SS
tON(MIN)
tOFF(MIN)
RPLLIN
RUN Pin On/Off Threshold
Soft-Start Charging Current
Minimum On Time
Minimum Off Time
PLLIN Input Resistance
VTRACK/SS = 0V
(Note 4)
(Note 4)
1 1.5
–1.0 –1.5
50
250
50
1.9
–2.0
100
400
V
µA
ns
ns
kΩ
IDRVCC
RFBHI
VMPGM
VMARG0,
VMARG1
PGOOD Output
Current into DRVCC Pin
Resistor Between VOUT_LCL and VFB
Margin Reference Voltage
VOUT = 1.5V, IOUT = 1A, DRVCC = 5V
MARG0, MARG1 Voltage Thresholds
60.098
18
60.4
1.18
1.4
25
60.702
mA
kΩ
V
V
ΔVFBH
ΔVFBL
ΔVFB(HYS)
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Hysteresis
VFB Rising
VFB Falling
VFB Returning
7 10
–7 –10
1.5
13
–13
%
%
%
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.
Note 2: The LTM4601HV is tested under pulsed load conditions such
that TJ ≈ TA. The LTM4601HVE is guaranteed to meet performance
specifications from 0°C to 85°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization
and correlation with statistical process controls. The LTM4601HVI is
guaranteed over the –40°C to 85°C temperature range.
Note 3: Remote sense amplifier recommended for ≤3.3V output.
Note 4: 100% tested at wafer level only.
Note 5: See output current derating curves for different VIN, VOUT and TA.
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LTM4601HV 전자부품, 판매, 대치품
LTM4601HV
PIN FUNCTIONS (See Package Description for Pin Assignment)
VIN (Bank 1): Power Input Pins. Apply input voltage be-
tween these pins and PGND pins. Recommend placing
input decoupling capacitance directly between VIN pins
and PGND pins.
VOUT (Bank 3): Power Output Pins. Apply output load
between these pins and PGND pins. Recommend placing
output decoupling capacitance directly between these pins
and PGND pins. See Figure 17.
PGND (Bank 2): Power ground pins for both input and
output returns.
VOSNS– (Pin M12): (–) Input to the Remote Sense Ampli-
fier. This pin connects to the ground remote sense point.
The remote sense amplifier is used for VOUT ≤3.3V. Tie to
INTVCC if not used.
VOSNS+ (Pin J12): (+) Input to the Remote Sense Ampli-
fier. This pin connects to the output remote sense point.
The remote sense amplifier is used for VOUT ≤3.3V. Tie to
ground if not used.
DIFFVOUT (Pin K12): Output of the Remote Sense Ampli-
fier. This pin connects to the VOUT_LCL pin. Leave floating
if remote sense amplifier is not used.
DRVCC (Pin E12): This pin normally connects to INTVCC
for powering the internal MOSFET drivers. This pin can be
biased up to 6V from an external supply with about 50mA
capability, or an external circuit as shown in Figure 18.
This improves efficiency at the higher input voltages by
reducing power dissipation in the module.
INTVCC (Pin A7): This pin is for additional decoupling of
the 5V internal regulator.
PLLIN (Pin A8): External Clock Synchronization Input
to the Phase Detector. This pin is internally terminated
to SGND with a 50k resistor. Apply a clock with a high
level above 2V and below INTVCC. See the Applications
Information section.
TRACK/SS (Pin A9): Output Voltage Tracking and Soft-
Start Pin. When the module is configured as a master
output, then a soft-start capacitor is placed on this pin
to ground to control the master ramp rate. A soft-start
capacitor can be used for soft-start turn on of a stand
alone regulator. Slave operation is performed by putting
a resistor divider from the master output to ground, and
connecting the center point of the divider to this pin. See
the Applications Information section.
MPGM (Pin A12): Programmable Margining Input. A re-
sistor from this pin to ground sets a current that is equal
to 1.18V/R. This current multiplied by 10kΩ will equal a
value in millivolts that is a percentage of the 0.6V refer-
ence voltage. See Applications Information. To parallel
LTM4601HVs, each requires an individual MPGM resistor.
Do not tie MPGM pins together.
fSET (Pin B12): Frequency Set Internally to 850kHz. An
external resistor can be placed from this pin to ground
to increase frequency. See the Applications Information
section for frequency adjustment.
VFB (Pin F12): The Negative Input of the Error Amplifier.
Internally, this pin is connected to VOUT_LCL pin with a
60.4k precision resistor. Different output voltages can be
programmed with an additional resistor between VFB and
SGND pins. See the Applications Information section.
MARG0 (Pin C12): This pin is the LSB logic input for the
margining function. Together with the MARG1 pin it will
determine if margin high, margin low or no margin state
is applied. The pin has an internal pull-down resistor of
50k. See the Applications Information section.
MARG1 (Pin D12): This pin is the MSB logic input for the
margining function. Together with the MARG0 pin it will
determine if margin high, margin low or no margin state
is applied. The pin has an internal pull-down resistor of
50k. See the Applications Information section.
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LTM4601HV

DC/DC uModule Regulator

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