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参数资料
| 型号： | LTC3416EFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 20TSSOP |
| 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 |
| 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： | 带卷 (TR) |
| 供应商设备封装： | 20-TSSOP-EP |
LTC3416
APPLICATIO S I FOR ATIO
I RMS 1 = 4 A ?
– 1 = 1 . 99 A RMS
? 1 . 8 V ? 3 . 3 V
? 3 . 3 V ? 1 . 8 V
I RMS 2 = 4 A ?
– 1 = 1 . 71 A RMS
? 2 . 5 V ? 3 . 3 V
? 3 . 3 V ? 2 . 5 V
R 4 = R 3 ?
– 1 ?
2 . 5 V = 0 . 8 V ? 1 +
? R 4 + R 5 ?
?
?
?
C IN1 and C IN2 should be sized for a maximum current
rating of:
?
?
Decoupling the PV IN and SV IN pins with two 100 μ F capaci-
tors on both switching regulators is adequate for most
applications.
The resitor values for the voltage divider on V OUT1 can be
calculated by using the following equation:
Setting R1 to 200k results in a value of 255k for R2. To
calculate the resistor values for the voltage divider on
V OUT2 , we can use the following equations:
? 2 . 5 V ?
? 1 . 8 V ?
R 3
Setting R3 to 205k gives the following results: R4 = 78.7k
and R5 = 357k. Figure 6 shows the complete schematic for
this design example.
1 . 8 V = 0 . 8 V ? 1 +
?
?
?
R 2 ?
R 1 ?
V IN
3.3V
C IN2 **
100 μ F
2 ×
PGOOD
R SS
2.2M
C SS
1000pF
R PG2
100k
R OSC2
7
14
16
4
17
3
2
PV IN
PV IN
SV IN
RUN
LTC3416
PGOOD
TRACK
R T
SW
SW
SW
SW
V FB
NC
NC
8
9
12
13
19
6
15
L2*
0.47 μ H
C FF2
22pF
X7R
R5
357k
R4
78.7k
R3
205k
C OUT2 **
100 μ F
2 ×
V OUT2
2.5V
4A
294k
5
1
10
SGND
PGND
PGND
I TH
PGND
PGND
18
20
11
R ITH2
5.9k
C ITH2
C C2
22pF
X7R
680pF
X7R
V IN
3.3V
PGOOD
C IN1 **
100 μ F
2 ×
R PG1
100k
R OSC1
7
14
16
4
17
3
2
PV IN
PV IN
SV IN
RUN
LTC3416
PGOOD
TRACK
R T
SW
SW
SW
SW
V FB
NC
NC
8
9
12
13
19
6
15
L1*
0.47 μ H
C FF1
22pF
X7R
R2
255k
R1
200k
C OUT1 **
100 μ F
2 ×
V OUT1
1.8V
4A
294k
5
1
10
SGND
PGND
PGND
I TH
PGND
PGND
18
20
11
R ITH1
5.9k
C ITH1
C C1
22pF
X7R
680pF
X7R
* TOKO FDVO630-R47M
3416 F06
** TDK C4532X5R0J107M
Figure 6. 1.8V and 2.5V, 4A Voltage Tracking Regulators at 1MHz
3416fa
13
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