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参数资料
| 型号： | LTC3880IUJ#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/112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
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage
V IN
I Q
V UVLO
Control Loop
V OUT1R0
V OUT1R1
V OUT0R0
V OUT0R1
V LINEREG
V LOADREG
g m0,1
I ISENSE0,1
V SENSERIN0
V SENSERIN1
V IlLIMIT
Input Voltage Range
Input Voltage Supply Current
Normal Operation
Undervoltage Lockout Threshold
when V IN > 4.3V
Full-Scale Voltage Range 0
Set Point Accuracy (0.6V to 5V)
Resolution
LSB Step Size
Full-Scale Voltage Range 1
Set Point Accuracy (0.6V to 2.5V)
Resolution
LSB Step Size
Full-Scale Voltage Range 0
Set Point Accuracy (0.6V to 4.096V)
Resolution
LSB Step Size
Full-Scale Voltage Range 1
Set Point Accuracy (0.6V to 2.5V)
Resolution
LSB Step Size
Line Regulation
Load Regulation
Error Amplifier g m
Input Current
V SENSE Input Resistance to Ground
V SENSE Input Resistance to Ground
Resolution
V ILIMMAX
(Note 12)
(Note 14)
V RUN0,1 = 3.3V, No Caps on TG and BG
V RUN0,1 = 0V
V INTVCC /V EXTVCC Falling
V INTVCC /V EXTVCC Rising
VOUT_COMMAND(1) = 5.500V (Note 9)
VOUT_COMMAND(1) = 2.75V (Note 9)
VOUT_COMMAND(0) = 4.095V (Note 9)
VOUT_COMMAND(0) = 2.75V (Note 9)
6V < V IN < 24V
? V ITH = 1.35V – 0.7V
? V ITH = 1.35V – 2.0V
I TH0,1 =1.22V
V ISENSE = 5.5V
0V ≤ V PIN ≤ 5.5V
0V ≤ V PIN ≤ 5.5V
Hi Range
Lo Range
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
4.5
5.4
–0.5
2.7
–0.5
4.0
–0.5
2.7
–0.5
68
44
25
20
3.7
3.95
12
1.375
12
0.6875
12
1.375
12
0.6875
0.01
–0.01
3
±1
41
37
3
75
50
24
5.6
0.5
2.8
0.5
4.2
0.5
2.8
0.5
±0.02
0.1
–0.1
±3
82
56
V
mA
mA
V
V
V
%
Bits
mV
V
%
Bits
mV
V
%
Bits
mV
V
%
Bits
mV
%/V
%
%
mmho
μA
kΩ
kΩ
bits
mV
mV
V ILMMIN
Hi Range
Lo Range
37.5
25
mV
mV
Gate Drivers
TG0,1 TG Transition Time:
t r Rise Time
t f Fall Time
BG0,1 BG Transition Time:
t r Rise Time
t f Fall Time
TG/BG t 1D Top Gate Off to Bottom Gate On Delay Time
BG/TG t 2D Bottom Gate Off to Top Gate On Delay Time
t ON(MIN) Minimum On-Time
OV/UV Output Voltage Supervisor Channel 0
(Note 4)
C LOAD = 3300pF
C LOAD = 3300pF
(Note 4)
C LOAD = 3300pF
C LOAD = 3300pF
(Note 4) C LOAD = 3300pF Each Driver
(Note 4) C LOAD = 3300pF Each Driver
30
30
30
30
30
30
90
ns
ns
ns
ns
ns
ns
ns
N
Resolution
8
Bits
V0 RANGE0
V0 RANGE1
V0 OUSTP0
V0 OUSTP1
Voltage Monitoring Range
Voltage Monitoring Range
Threshold Programming Step
Threshold Programming Step
Range Value = 0
Range Value = 1
Range Value = 0
Range Value = 1
1
0.5
22
11
4.096
2.7
V
V
mV
mV
3880fb
For more information www.linear.com/LTC3880
5
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