LTM4627 데이터 시트보기 (PDF) - Linear Technology
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LTM4627 Datasheet PDF : 32 Pages
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LTM4627
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified internal
operating temperature range, otherwise specifications are at TA = 25°C (Note 2), VIN = 12V, per the typical application in Figure 18.
SYMBOL
VOS
PARAMETER
Input Offset Voltage
CONDITIONS
VOSNS+ = VDIFF_OUT = 1.5V, IDIFF_OUT = 100µA
MIN TYP MAX UNITS
2
mV
AV
Differential Gain
(Note 7)
1
V/V
SR
Slew Rate
(Note 6)
2
V/µs
GBP
Gain Bandwidth Product
(Note 6)
3
MHz
CMRR
Common Mode Rejection (Note 7)
60
dB
IDIFF_OUT
PSRR
DIFF_OUT Current
Power Supply Rejection
Ratio
Sourcing
5V < VIN < 20V (Note 7)
2
mA
100
dB
RIN
Input Resistance
VOSNS+ to GND
80
kΩ
VPGOOD
VPGL
PGOOD Trip Level
PGOOD Voltage Low
VFB With Respect to Set Output
VFB Ramping Negative
VFB Ramping Positive
IPGOOD = 2mA
–10
%
10
%
0.1
0.3
V
INTVCC Linear Regulator
VINTVCC
Internal VCC Voltage
VINTVCC Load Reg INTVCC Load Regulation
VEXTVCC
External VCC Switchover
6V < VIN < 20V
ICC = 0 to 50mA
EXTVCC Ramping Positive
4.8
5
5.2
V
0.5
%
l
4.5
4.7
V
VLDO Ext
EXTVCC Voltage Drop
ICC = 25mA, VEXTVCC = 5V
50
100
mV
Oscillator and Phase-Locked Loop
fSYNC
Frequency Sync Capture
Range
MODE_PLLIN Clock Duty Cycle = 50%
250
800
kHz
fNOM
Nominal Frequency
VfSET = 1.2V
fLOW
Lowest Frequency
VfSET = 1V
fHIGH
Highest Frequency
VfSET ≥ 2.4V
450 500 550
kHz
350 400 450
kHz
700 770 850
kHz
IFREQ
Frequency Set Current
9
10
11
µA
RMODE_PLLIN
MODE_PLLIN Input
Resistance
250
kΩ
VIH_MODE_PLLIN
VIL_MODE_PLLIN
Clock Input Level High
Clock Input Level Low
2.0
V
0.8
V
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 LTM4627 is tested under pulsed load conditions such that
TJ ≈ TA. The LTM4627E is guaranteed to meet performance specifications
over the 0°C to 125°C internal operating temperature range. Specifications
over the –40°C to 125°C internal operating temperature range are assured
by design, characterization and correlation with statistical process
controls. The LTM4627I is guaranteed to meet specifications over the
–40°C to 125°C internal operating temperature range. The LTM4627MP
is guaranteed and tested over the –55°C to 125°C internal 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
resistance and other environmental factors.
Note 3: The minimum on-time condition is specified for a peak-to-peak
inductor ripple current of ~40% of IMAX Load. (See the Applications
Information section)
Note 4: See output current derating curves for different VIN, VOUT and TA.
Note 5: Limit current into the RUN pin to less than 2mA.
Note 6: Guaranteed by design.
Note 7: 100% tested at wafer level.
4627fc
4
For more information www.linear.com/LTM4627
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