参数资料
型号: LTC3418EUHF#TRPBF
厂商: Linear Technology
文件页数: 6/20页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 8A 38QFN
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: 2.25 V ~ 5.5 V
PWM 型: 电流模式,混合
频率 - 开关: 1MHz
电流 - 输出: 8A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 38-WFQFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 38-QFN(5x7)
LTC3418
PIN FUNCTIONS
V REF (Pin 16): Reference Output. Decouple this pin with
a 2.2μF capacitor.
SV IN (Pin 24): Signal Input Supply. Decouple this pin to
SGND with a capacitor.
V FB (Pin 25): Feedback Pin. Receives the feedback voltage
from a resistive divider connected across the output.
I TH (Pin 26): Error Ampli?er Compensation Point. The
current comparator threshold increases with this control
voltage. Nominal voltage range for this pin is from 0.2V
to 1.4V with 0.4V corresponding to the zero-sense voltage
(zero current).
BLOCK DIAGRAM
SYNC/MODE (Pin 27): Mode Select and External Clock
Synchronization Input. To select Forced Continuous, tie
to SV IN . Connecting this pin to a voltage between 0V and
1V selects Burst Mode operation with the burst clamp set
to the pin voltage.
TRACK (Pin 35): Voltage Tracking Input. Feedback volt-
age will regulate to the voltage on this pin during start-up
power sequencing.
Exposed Pad (Pin 39): The Exposed Pad is PGND and must
be soldered to the PCB ground for electrical connection
and rated thermal performance.
24
8
26
PV IN
SV IN
SGND
I TH
3
29
16
V REF
VOLTAGE
4
28
REFERENCE
35
TRACK
ERROR
SLOPE
COMPENSATION
RECOVERY
PMOS CURRENT
COMPARATOR
9
10
23
22
25
V FB
+
AMPLIFIER
BURST
COMPARATOR
BCLAMP
+
SYNC/MODE
+
+
0.74V
+
OSCILLATOR
SLOPE
COMPENSATION
SW
1
2
+
LOGIC
11
20
30
12
21
31
0.86V
NMOS
CURRENT
COMPARATOR
7
RUN/SS
RUN
PGND
5
PGOOD
CURRENT
REVERSE
COMPARATOR
13
14
15
32
33
34
17
36
6
R T
27
SYNC/MODE
18
19
37
38
3418 BD
3418fb
6
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