参数资料
| 型号： | LTC3412IFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 16TSSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 5 V |
| 输入电压： | 2.63 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 950kHz |
| 电流 - 输出： | 2.5A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-TSSOP-EP |
LTC3412
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V IN = 3.3V unless otherwise specified.
SYMBOL
f OSC
PARAMETER
Switching Frequency
Switching Frequency Range
CONDITIONS
R OSC = 309k Ω
(Note 6)
MIN
0.88
0.3
TYP
0.95
MAX
1.1
4
UNITS
MHz
MHz
f SYNC
R PFET
R NFET
I LIMIT
SYNC Capture Range
R DS(ON) of P-Channel FET
R DS(ON) of N-Channel FET
Peak Current Limit
(Note 6)
I SW = 1A (Note 7)
I SW = –1A (Note 7)
0.3
4
85
65
5.4
4
110
90
MHz
m Ω
m Ω
A
V UVLO
I LSW
V RUN
I RUN
Undervoltage Lockout Threshold
SW Leakage Current
RUN Threshold
RUN/SS Leakage Current
V RUN = 0V, V IN = 5.5V
2.375
0.5
2.500
0.1
0.65
2.625
1
0.8
1
V
μ A
V
μ A
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3412E is guaranteed to meet performance specifications
from 0 ° C to 85 ° C. Specifications over the – 40 ° C to 85 ° C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3412I is guaranteed to meet
specified performance over the – 40 ° C to 85 ° C temperature range.
Note 3: The LTC3412 is tested in a feedback loop that adjusts V FB to
achieve a specified error amplifier output voltage (I TH ).
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: T J is calculated from the ambient temperature T A and power
dissipation as follows: LTC3412: T J = T A + P D (37.6 ° C/W).
Note 6: 4MHz operation is guaranteed by design and not production tested.
Note 7: Switch on resistance is guaranteed by design and test correlation
in the UF package and by production test in the FE package.
TYPICAL PERFOR A CE CHARACTERISTICS
100
Efficiency vs Load Current
100
90
Efficiency vs Load Current
100
90
Efficiency vs Load Current
80
Burst Mode OPERATION
80
70
V IN = 3.3V
V IN = 5V
80
70
V IN = 3.3V
V IN = 5V
60
40
FORCED CONTINUOUS
60
50
40
30
60
50
40
30
V OUT = 2.5V
10
20
0
0.001
0.01
V IN = 3.3V
V OUT = 2.5V
0.1 1 10
20
1MHz
Burst Mode OPERATION
0
0.001 0.01 0.1 1
10
20
10
0
0.001
0.01
V OUT = 2.5V
1MHz
FORCED CONTINUOUS
0.1 1 10
LOAD CURRENT (A)
3412 G01
LOAD CURRENT (A)
3412 G02
LOAD CURRENT (A)
3412 G03
3412fb
3
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