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参数资料
| 型号： | LTC3880IUJ#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/112页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 40-QFN |
| 软件下载： | LTpowerPlay™ |
| 标准包装： | 2,000 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1MHz |
| 电源电压： | 4.5 V ~ 24 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 ~ 125°C |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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LTC3880/LTC3880-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T A = 25°C. (Note 2) V IN = 12V, V RUN0,1 = 3.3V, f SYNC = 500kHz (externally
driven) unless otherwise specified.
SYMBOL PARAMETER
V0 THACC0 Threshold Accuracy 2V < V OUT0 < 4V
V0 THACC1 Threshold Accuracy 1V < V OUT0 < 2.5V
t PROPOV0 OV Comparator to GPIO Low Time
t PROPUV0 UV Comparator to GPIO Low Time
OV/UV Output Voltage Supervisor Channel 1
N
Resolution
CONDITIONS
Range Value = 0
Range Value = 1
V OD = 10% of Threshold
V OD = 10% of Threshold
l
l
MIN
TYP
8
MAX
±2
±2
35
100
UNITS
%
%
μs
μs
bits
V1 RANGE0 Voltage Range
V1 RANGE1 Voltage Range
V1 OUSTP0 Step Size
V1 OUSTP1 Step Size
V1 THACC0 Threshold Accuracy 2V < V OUT1 < 5V
V1 THACC1 Threshold Accuracy 1V < V OUT1 < 2.5V
t PROPOV1 OV Comparator to GPIO Low Time
t PROPUV1 UV Comparator to GPIO Low Time
V IN Voltage Supervisor
N Resolution
Range Value = 0
Range Value = 1
Range Value = 0
Range Value = 1
Range Value = 0
Range Value = 1
V OD = 10% of Threshold
V OD = 10% of Threshold
l
l
1
0.5
22
11
8
5.5
2.7
±2
±2
35
100
V
V
mV
mV
%
%
μs
μs
bits
V INRANGE
V INSTP
V INTHACC
V INTHACC\M
t PROPVIN
Full-Scale Voltage
Step Size
Threshold Accuracy 9.0V < V IN < 20V
Threshold Accuracy 4.5V < V IN ≤ 9V
Comparator Response Time
(VIN_ON and VIN_OFF)
V OD = 10% of Threshold
l
l
4.5
82
20
±2.5
±5
100
V
mV
%
%
μs
Output Voltag e Readback
N
Resolution
LSB Step Size
16
244
Bits
μV
V OFS Full-Scale Voltage
V OUT_TUE Total Unadjusted Error
V OS Zero-Code Offset Voltage
t CONVERT Conversion Time
V IN Voltage Readback
N Resolution
(Note 10) V RUN n = 0V (Note 8)
(Note 8) V OUT n > 0.6V
(Note 6)
(Note 5)
l
8
100
10
0.5
±500
V
%
μV
ms
Bits
V IFS
V IN_TUE
Full-Scale Voltage
Total Unadjusted Error
(Note 11)
V VIN > 4.5V (Note 8)
l
38.91
0.5
2
V
%
%
t CONVERT Conversion Time
Output Curren t Readback
(Note 6)
100
ms
N Resolution
LSB Step Size
I FS Full-Scale Current
I OUT_TUE Total Unadjusted Error
V OS Zero-Code Offset Voltage
t CONVERT Conversion Time
Input Current and Duty Cycle Readback
(Note 5)
0V ≤ |V ISENSE+ – V ISENSE– | < 16mV
16mV ≤ |V ISENSE+ – V ISENSE– | < 32mV
32mV ≤ |V ISENSE+ – V ISENSE– | < 63.9mV
63.9mV ≤ |V ISENSE+ – V ISENSE– | < 127.9mV
(Note 7) R ISENSE = 1mΩ
(Note 8) V ISENSE > 6mV (Note 15)
(Note 6)
l
10
15.625
31.25
62.5
125
±128
100
±1
±28
Bits
μV
μV
μV
μV
A
%
μV
ms
D_RES Resolution
10
Bits
D_TUE Total Unadjusted Error
16.3% Duty Cycle
–3
3
%
t CONVERT
Update Rate
(Note 6)
100
ms
3880fb
6
For more information www.linear.com/LTC3880
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