参数资料
型号: ISL8033IRZ
厂商: Intersil
文件页数: 2/18页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 3A DL 24QFN
标准包装: 75
类型: 降压(降压)
输出类型: 可调式
输出数: 2
输出电压: 0.8 V ~ 6 V
输入电压: 2.85 V ~ 6 V
PWM 型: 电流模式
频率 - 开关: 1.1MHz
电流 - 输出: 3A
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: 24-VFQFN 裸露焊盘
包装: 管件
供应商设备封装: 24-QFN(4x4)
ISL8033, ISL8033A
Typical Application Circuit
INPUT 2.85V TO 6V
VIN1, 2
LX1
L1
1.5μH
C2
OUTPUT1
1.8V/3A
C1
2x22μF
VDD
ISET
ISL8033
PGND
2x22μF
R2
124k
C3
12pF
EN1
FB1
R3
PG1
SGND
100k
SYNC
LX2
L2
1.5μH
OUTPUT2
1.8V/3A
EN2
PGND
C4
2x22μF
C5
R5
12pF
PG2
124k
FB2
R6
100k
SGND
FIGURE 2. TYPICAL APPLICATION DIAGRAM - DUAL INDEPENDENT OUTPUTS
TABLE 1. ISL8033 COMPONENT VALUE SELECTION
V OUT
C1
C2 (or C4)
C3 (or C5)
L1 (or L2)
R2 (or R5)
R3 (or R6)
0.8V
2x22μF
2x22μF
12pF
1.0μH~2.2μH
0
100k
1.2V
2x22μF
2x22μF
12pF
1.0μH~2.2μH
50k
100k
1.5V
2x22μF
2x22μF
12pF
1.0μH~2.2μH
87.5k
100k
1.8V
2x22μF
2x22μF
12pF
1.0μH~3.3μH
124k
100k
2.5V
2x22μF
2x22μF
12pF
1.0μH~3.3μH
212.5k
100k
3.3V
2x22μF
2x22μF
12pF
1.0μH~4.7μH
312.5k
100k
TABLE 2. ISL8033A COMPONENT VALUE SELECTION
V OUT
C1
C2 (or C4)
C3 (or C5)
L1 (or L2)
R2 (or R5)
R3 (or R6)
0.8V
2x22μF
2x22μF
12pF
0.47~1.5μH
0
100k
1.2V
2x22μF
2x22μF
12pF
0.47~1.5μH
50k
100k
1.5V
2x22μF
2x22μF
12pF
0.47~1.5μH
87.5k
100k
1.8V
2x22μF
2x22μF
12pF
0.47~1.5μH
124k
100k
2.5V
2x22μF
2x22μF
12pF
1.0~2.2μH
212.5k
100k
3.3V
2x22μF
2x22μF
12pF
1.0~3.3μH
312.5k
100k
NOTE: The minimum output capacitor value is given for different output voltage to make sure the whole converter system is stable. Output capacitance
should increase to support faster load transient requirement.
TABLE 3. SUMMARY OF DIFFERENCES
PART NUMBER
ISL8033
ISL8033A
SWITCHING FREQUENCY
Internally fixed switching frequency F SW = 1MHz
Internally fixed switching frequency F SW = 2.5MHz
2
FN6854.2
March 24, 2011
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