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LTM4639 데이터시트(PDF) 4 Page - Linear Technology

부품명 LTM4639
상세설명  Ultrathin, Triple Output, Step-Down 關Module Regulator for DDR-QDR4 Memory
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제조업체  LINER [Linear Technology]
홈페이지  http://www.linear.com
Logo LINER - Linear Technology

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LTM4632
4
4632fc
For more information www.linear.com/LTM4632
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 LTM4632 is tested under pulsed load conditions such that
TJ ≈ TA. The LTM4632E 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 LTM4632I is guaranteed to meet specifications over the
full –40°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.
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications that apply over the specified internal
operating temperature range (Note 2). Specified as each individual output channel at TA = 25°C (Note 2), VIN = 12V, unless otherwise
noted, per the typical application in Figure 19
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Control Section
VFB1
Voltage at VFB1 Pin
IOUT = 0A, VOUT1 = 1.3V
l
0.593
0.600
0.607
V
IFB1
Current at VFB1 Pin
(Note 4)
±30
nA
RFBHI1
Resistor Between VOUT1 and
VFB1 Pins
60.00
60.40
60.80
VTTR
VTTR Voltage Reference
VDDQIN = 1.3V,
IVTTR = ±10mA, CVTTR < 10nF
l
0.492x
VDDQIN
0.50x
VDDQIN
0.508x
VDDQIN
V
VRUN1, VRUN2
RUN Pin On Threshold
RUN Threshold Rising
RUN Threshold Falling
1.18
0.95
1.28
1.01
1.39
1.05
V
V
IRUN1, IRUN2
RUN Pin Leakage Current
0
±1
µA
ITRACK/SS1
TRACK/SS1 Pin Soft-Start Pull-Up
Current
TRACK/SS1 = 0V
1.2
µA
tON(MIN)
Minimum On-Time
(Note 4)
20
ns
tOFF(MIN)
Minimum Off-Time
(Note 4)
45
ns
VPGOOD
PGOOD Trip Level
VFB With Respect to 0.6V
VOUT2 With Respect to VDDQIN/2 (Note 4)
Ramping Negative
Ramping Positive
–8
8
–14
14
%
%
RPGOOD
PGOOD Pull-Down Resistance
1mA Load
15
Ω
VINTVCC
Internal VCC Voltage
VIN = 3.6V to 15V
3.1
3.3
3.5
V
VINTVCC Load Reg
INTVCC Load Regulation
ICC = 0 to 50mA
1.3
%
fOSC
Oscillator Frequency
1
MHz
SYNC
SYNC Threshold Voltage
0.95
V
ISYNC/MODE
MODE Input Current
SYNC/MODE = INTVCC
–1.5
µA
Note 3. See output current derating curves for different VIN, VOUT and TA.
Note 4. 100% tested at wafer level.
Note 5. This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.


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