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参数资料
| 型号： | LTC1629IG#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/28页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 28-SSOP |
| 标准包装： | 2,000 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 360kHz |
| 占空比： | 99.5% |
| 电源电压： | 4 V ~ 36 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 包装： | 带卷 (TR) |
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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 T A = 25 ° C. V IN = 15V, V RUN/SS1, 2 = 5V unless otherwise noted.
SYMBOL
V OS
PARAMETER
Input Offset Voltage
CONDITIONS
Op Amp Mode; V CM = 2.5V; LTC1629 Only
MIN
TYP
MAX
6
UNITS
mV
V DIFFOUT = 5V; I DIFFOUT = 1mA
I B
A OL
Input Bias Current
Open Loop DC Gain
Op Amp Mode; LTC1629 Only
Op Amp Mode; 0.7V ≤ V DIFFOUT < 10V; LTC1629 Only
30
5000
200
nA
V/mV
V CM
CMRR OA
PSRR OA
I CL
V OMAX
GBW
SR
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; LTC1629 Only
Op Amp Mode; 0V < V CM < 3V; LTC1629 Only
Op Amp Mode; 6V < V IN < 30V; LTC1629 Only
Op Amp Mode; V DIFFOUT = 0V; LTC1629 Only
Op Amp Mode; I DIFFOUT = 1mA; LTC1629 Only
Op Amp Mode; I DIFFOUT = 1mA; LTC1629 Only
Op Amp Mode; R L = 2k; LTC1629 Only
0
70
70
10
10
90
90
35
11
2
5
3
V
dB
dB
mA
V
MHz
V/ μ s
Note 1: Absolute Maximum Ratings are those values beyond which the
life of a device may be impaired.
Note 2: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formulas:
LTC1629/LTC1629-PG: T J = T A + (P D ? 95 ° C/W)
Note 3: The LTC1629/LTC1629-PG are tested in a feedback loop that
servos V ITH to a specified voltage and measures the resultant V EAIN .
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 I MAX (see Minimum On-Time
Considerations in the Applications Information section).
TYPICAL PERFOR A CE CHARACTERISTICS
100
Efficiency vs Output Current
(Figure 12)
100
Efficiency vs Output Current
(Figure 12)
100
Efficiency vs Input Voltage
(Figure 12)
80
60
V IN = 5V
V IN = 8V
V IN = 12V
90
80
V EXTVCC = 5V
V EXTVCC = 0V
90
V OUT = 3.3V
V EXTVCC = 5V
I OUT = 20A
V IN = 20V
40
70
80
20
V OUT = 3.3V
V EXTVCC = 5V
I OUT = 20A
60
V OUT = 3.3V
0
0.1
1
10
100
50
1
10
100
70
5
10
15
20
4
OUTPUT CURRENT (A)
1629 G01
OUTPUT CURRENT (A)
1629 G02
V IN (V)
1629 G03
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