參數(shù)資料
型號(hào)： LTC3728LIUH-1#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 3 A DUAL SWITCHING CONTROLLER, 590 kHz SWITCHING FREQ-MAX, PQCC32
封裝： 5 X 5 MM, PLASTIC, MO-220WHHD, QFN-32
文件頁數(shù)： 27/32頁
文件大?。?/td> 475K
代理商： LTC3728LIUH-1#TR
LTC3728L-1
4
3728l1fc
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IPLLFLTR
Phase Detector Output Current
Sinking Capability
Sourcing Capability
fPLLIN < fOSC
fPLLIN > fOSC
–15
15
μA
3.3V Linear Regulator
V3.3OUT
3.3V Regulator Output Voltage
No Load
●
3.2
3.35
3.45
V
V3.3IL
3.3V Regulator Load Regulation
I3.3 = 0 to 10mA
0.5
2
%
V3.3VL
3.3V Regulator Line Regulation
6V < VIN < 30V
0.05
0.2
%
I3.3LEAK
Leakage Current in Shutdown
VRUN/SS1 = 0V; VRUN/SS2 = 0V, VIN = 3V
●
10
50
μA
PGOOD Output
VPGL
PGOOD Voltage Low
IPGOOD = 2mA
0.1
0.3
V
IPGOOD
PGOOD Leakage Current
VPGOOD = 5V
±1
μA
VPG
PGOOD Trip Level, Either Controller
VOSENSE with Respect to Set Output Voltage
VOSENSE Ramping Negative
VOSENSE Ramping Positive
–6
6
–7.5
7.5
– 9.5
9.5
%
Efciency vs Output Current
and Mode (Figure 13)
Efciency vs Output Current
(Figure 13)
Efciency vs Input Voltage
(Figure 13)
TYPICAL PERFORMANCCE CHARACTERISTICS
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: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
LTC3728LUH-1: TJ = TA + (PD 34°C/W)
LTC3728LGN-1: TJ = TA + (PD 95°C/W)
Note 3: The IC is tested in a feedback loop that servos VITH1, 2 to a
specied voltage and measures the resultant VOSENSE1, 2.
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 5: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 6: The minimum on-time condition is specied for an inductor
peak-to-peak ripple current ≥ 40% of IMAX (see minimum on-time
considerations in the Applications Information section).
Note 7: The LTC3728LE-1 are guaranteed to meet performance
specications from 0°C to 85°C. Specications over the –40°C to 85°C
operating temperature range are assured by design, characterization
and correlation with statistical process controls. The LTC3728LI-1 is
guaranteed to meet performance specications over the full –40°C to 85°C
operating temperature range
OUTPUT CURRENT (A)
0.001
0
EFFICIENCY
(%)
10
30
40
50
100
70
0.01
0.1
1
3728L1 G01
20
80
90
60
10
FORCED
CONTINUOUS
MODE (PWM)
CONSTANT
FREQUENCY
(BURST DISABLE)
Burst Mode
OPERATION
VIN = 15V
VOUT = 5V
f = 250kHz
OUTPUT CURRENT (A)
0.001
EFFICIENCY
(%)
70
80
10
3728L1 G02
60
50
0.01
0.1
1
100
90
VIN = 10V
VIN = 15V
VIN = 7V
VIN = 20V
VOUT = 5V
f = 250kHz
INPUT VOLTAGE (V)
5
EFFICIENCY
(%)
70
80
3728L1 G03
60
50
15
25
35
100
VOUT = 5V
IOUT = 3A
f = 250kHz
90
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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