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| 型号： | LTC3605EUF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/22页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 5A 24QFN |
| 标准包装： | 91 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 14.9 V |
| 输入电压： | 4 V ~ 15 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 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： | 24-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 24-QFN（4x4） |
| 产品目录页面： | 1335 (CN2011-ZH PDF) |
LTC3605
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C.
SYMBOL
PV IN
I Q
PARAMETER
V IN Supply Range
Input DC Supply Current
Active
Shutdown
CONDITIONS
(Note 3)
Mode = 0, R T = 162k
V IN =12V, RUN = 0
MIN
4
TYP
2
11
MAX
15
5
40
UNITS
V
mA
μA
V FB
D V FB(LINE)
D V FB(LOAD)
Feedback Reference Voltage
Feedback Voltage Line
Regulation
Feedback Voltage Load
Regulation
ITH =1.2V (Note 4) –40°C to 85°C
ITH =1.2V (Note 4) –40°C to 125°C
V IN = 4V to 15V, ITH = 1.2V, –40°C to 85°C
V IN = 4V to 15V, ITH = 1.2V, –40°C to 125°C
ITH = 0.8V to 1.6V, –40°C to 85°C
ITH = 0.8V to 1.6V, –40°C to 125°C
l
l
l
l
l
l
0.594
0.592
0.600
0.600
0.001
0.04
0.1
0.1
0.606
0.608
0.02
0.1
0.2
0.3
V
V
%/V
%/V
%
%
I FB
Feedback Pin Input Current
±30
nA
g m (EA)
Error Amplifier Transconductance
ITH = 1.2V
1.15
1.35
1.6
mS
t ON(MIN)
t OFF(MIN)
Minimum On-Time
Minimum Off-Time
40
70
ns
ns
I LIM
R TOP
R BOTTOM
V UVLO
V RUN
V INTVCC
D V INTVCC
OV
UV
D V FB(HYS)
R PGOOD
Positive Inductor Valley Current Limit
Top Power NMOS On-Resistance
Bottom Power NMOS On-Resistance
INTV CC Undervoltage Lockout
Threshold
Run Threshold 2 (I Q = 2mA)
Run Threshold 1 (I Q = 400μA)
Internal V CC Voltage
INTV CC Load Regulation
Output Overvoltage
PGOOD Upper Threshold
Output Undervoltage
PGOOD Lower Threshold
PGOOD Hysteresis
PGOOD Pull-Down Resistance
V FB = 0.57V
INTV CC = 3.3V
INTV CC = 3.3V
INTV CC Falling
INTV CC Hysteresis (Rising)
RUN Rising
RUN Rising
4V < V IN < 15V
I LOAD = 0mA to 20mA
V FB Rising
V FB Falling
V FB Returning
1mA Load
5
2.4
1.2
0.45
3.2
7
–13
6
70
35
2.6
0.25
1.25
0.6
3.3
0.5
10
–10
1.5
12
7.5
150
55
2.8
1.3
0.75
3.4
13
–7
25
A
m W
m W
V
V
V
V
V
%
%
%
%
W
I PGOOD
I TRACK/SS
PGOOD Leakage
TRACK Pull-Up Current
0.54V < V FB < 0.66V
2.5
2
4
μA
μA
f OSC
Oscillator Frequency
R T = 162k
l
0.85
1
1.2
MHz
CLKIN
CLKIN Threshold
0.7
V
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. Absolute Maximum Ratings are those values beyond
which the life of a device may be impaired.
Note 2: The LTC3605E 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 LTC3605I is guaranteed over the full
–40°C to 125°C operating temperature range.
Note 3: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 4: The LTC3605 is tested in a feedback loop that adjusts V FB to
achieve a specified error amplifier output voltage (ITH).
Note 5: T J is calculated from the ambient temperature T A and
power dissipation as follows: T J = T A + P D ? (37°C/W). See Thermal
Considerations section.
Note 6: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
3605fc
3
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