LTC1629-6 データシートの表示（PDF） - Linear Technology
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LTC1629-6 Datasheet PDF : 28 Pages
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LTC1629-6
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS = 5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Differential Amplifier Gain Block (Note 5)
ADA
CMRRDA
RIN
Gain
Common Mode Rejection Ratio
Input Resistance
0V < VCM < 5V
Measured at VOS+ Input
0.995
1
1.005
V/V
46
55
dB
80
kΩ
Note 1: Absolute Maximum Ratings are those values beyond which the
life of a device may be impaired.
Note 2: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
TJ = TA + (PD • 95°C/W)
Note 3: The I.C. is tested in a feedback loop that servos VITH to a
specified voltage and measures the resultant VEAIN.
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 5: The minimum on-time condition corresponds to the on inductor
peak-to-peak ripple current ≥ 40% of IMAX (see Minimum On-Time
Considerations in the Applications Information section).
Note 6: The LTC1629EG-6 is guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the – 40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency vs Output Current
(Figure 12)
100
80
60
40
20
0
0.1
VIN = 5V
VIN = 8V
VIN = 12V
VIN = 20V
VOUT = 3.3V
VEXTVCC = 5V
IOUT = 20A
1
10
OUTPUT CURRENT (A)
100
1629 G01
Efficiency vs Output Current
(Figure 12)
100
VEXTVCC = 5V
90
VEXTVCC = 0V
80
70
60
VOUT = 3.3V
50
1
10
100
OUTPUT CURRENT (A)
1629 G02
Efficiency vs Input Voltage
(Figure 12)
100
VOUT = 3.3V
VEXTVCC = 5V
IOUT = 20A
90
80
70
5
10
15
VIN (V)
20
1629 G03
16296f
4
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