LTC1629C 데이터 시트보기 (PDF) - Linear Technology
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LTC1629C Datasheet PDF : 28 Pages
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LTC1629/LTC1629-PG
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/SS1, 2 = 5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VOS
IB
AOL
VCM
CMRROA
PSRROA
ICL
VOMAX
GBW
SR
Input Offset Voltage
Input Bias Current
Open Loop DC Gain
Common Mode Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Maximum Output Current
Maximum Output Voltage
Gain-Bandwidth Product
Slew Rate
Op Amp Mode; VCM = 2.5V; LTC1629 Only
VDIFFOUT = 5V; IDIFFOUT = 1mA
Op Amp Mode; LTC1629 Only
Op Amp Mode; 0.7V ≤ VDIFFOUT < 10V; LTC1629 Only
Op Amp Mode; LTC1629 Only
Op Amp Mode; 0V < VCM < 3V; LTC1629 Only
Op Amp Mode; 6V < VIN < 30V; LTC1629 Only
Op Amp Mode; VDIFFOUT = 0V; LTC1629 Only
Op Amp Mode; IDIFFOUT = 1mA; LTC1629 Only
Op Amp Mode; IDIFFOUT = 1mA; LTC1629 Only
Op Amp Mode; RL = 2k; LTC1629 Only
6
mV
30
200
nA
5000
V/mV
0
3
V
70
90
dB
70
90
dB
10
35
mA
10
11
V
2
MHz
5
V/µs
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:
LTC1629/LTC1629-PG: TJ = TA + (PD • 95°C/W)
Note 3: The LTC1629/LTC1629-PG are 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: When the AMPMD pin is high, the IC pins are connected directly to
the internal op amp inputs. When the AMPMD pin is low, internal MOSFET
switches connect four 40k resistors around the op amp to create a
standard unity-gain differential amp.
Note 6: 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).
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
4
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