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| 型号： | LTC3414EFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 20TSSOP |
| 标准包装： | 74 |
| 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： | 2.25 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 4A |
| 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： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 20-TSSOP-EP |
| 产品目录页面： | 1334 (CN2011-ZH PDF) |
LTC3414
ABSOLUTE
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
Input Supply Voltage ................................... –0.3V to 6V
I TH , RUN/SS, V FB ,
SYNC/MODE Voltages .................................. –0.3 to V IN
PGND 1
RT 2
SYNC/MODE 3
RUN/SS 4
TOP VIEW
20 PGND
19 V FB
18 I TH
17 PGOOD
ORDER PART
NUMBER
LTC3414EFE
SW Voltages ................................. –0.3V to (V IN + 0.3V)
Peak SW Sink and Source Current ......................... 9.5A
Operating Temperature Range (Note 2)
E, I Grades .............................................. – 40 ° C to 85 ° C
MP Grade ............................................. – 55 ° C to 125 ° C
Junction Temperature (Notes 5, 6) ....................... 125 ° C
Storage Temperature Range ................. – 65 ° C to 150 ° C
Lead Temperature (Soldering, 10 sec).................. 300 ° C
SGND 5 16 SV IN
21
NC 6 15 NC
PV IN 7 14 PV IN
SW 8 13 SW
SW 9 12 SW
PGND 10 11 PGND
FE PACKAGE
20-LEAD PLASTIC TSSOP
EXPOSED PAD (PIN 21), MUST BE SOLDERED TO PCB
T JMAX = 125 ° C, θ JA = 38 ° C/W, θ JC = 10 ° C/W
Order Options Tape and Reel: Add #TR
LTC3414IFE
LTC3414MPFE
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
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
V IN
I FB
PARAMETER
Input Voltage Range
Feedback Pin Input Current
CONDITIONS
(Note 3)
●
MIN
2.25
TYP
MAX
5.5
0.2
UNITS
V
μ A
V FB
Δ V FB
V LOADREG
Regulated Feedback Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
E, I Grade (Note 3)
MP Grade
V IN = 2.7V to 5.5V (Note 3)
Measured in Servo Loop, V ITH = 0.36V
Mesured in Servo Loop, V ITH = 0.84V
●
●
●
●
0.784
0.780
0.800
0.800
0.04
0.02
–0.02
0.816
0.816
0.2
0.2
–0.2
V
V
%V
%
%
Δ V PGOOD
R PGOOD
Power Good Range
Power Good Resistance
± 7.5
120
± 9
200
%
Ω
I Q
Input DC Bias Current
Active Current
Sleep
Shutdown
(Note 4)
V FB = 0.75V, V ITH = 1.2V
V FB = 1V, V ITH = 0V, V SYNC/MODE = 0V
V RUN = 0V
250
64
0.02
330
100
1
μ A
μ A
μ A
f OSC
f SYNC
R PFET
R NFET
I LIMIT
Switching Frequency
Switching Frequency Range
SYNC Capture Range
R DS(ON) of P-Channel FET
R DS(ON) of N-Channel FET
Peak Current Limit
R OSC = 294k
I SW = 300mA
I SW = –300mA
0.88
0.3
0.3
6
1.00
67
50
8
1.12
4
4
100
100
MHz
MHz
MHz
m Ω
m Ω
A
V UVLO
I LSW
V RUN
Undervoltage Lockout Threshold
SW Leakage Current
RUN Threshold
V RUN = 0V, V IN = 5.5V
1.75
0.5
2.00
0.1
0.65
2.25
1.0
0.8
V
μ A
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.
Note 2: The LTC3414E 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 LTC3414I is guaranteed over the full
–40 ° C to 85 ° C operating temperature range. The LTC3414MP is
guaranteed over the full –55 ° C to 125 ° C operating tempaerature range.
Note 3: The LTC3414 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 P D as follows: T J =T A + (P D )(38 ° C/W)
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 reliabability.
3414fb
2
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