参数资料
型号: MAX758AEWE+T
厂商: Maxim Integrated Products
文件页数: 11/16页
文件大小: 0K
描述: IC REG BUCK ADJ 0.75A 16SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1,000
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 1.25 V ~ 16 V
输入电压: 4 V ~ 16 V
PWM 型: 电流模式
频率 - 开关: 160kHz
电流 - 输出: 750mA
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: 16-SOIC(0.295",7.50mm 宽)
包装: 带卷 (TR)
供应商设备封装: 16-SOIC W
Adjustable, Step-Down,
Current-Mode PWM Regulators
MAX750A: 4.0V TO 11.0V
MAX758A: 4.0V TO 16.0V
8
C2
1μF
C3 *
OPTIONAL LOWPASS OUTPUT FILTER
1
SHDN
V+
LX
7
D1
OUTPUT
L2
25μF
FILTER
OUTPUT
IN5817
L1 *
C7
R1
510k
MAX750A
MAX758A
I.C.
5
OUTPUT
5V
2.2μF
3
SS
CC
4
C5
330pF
R2
40.2k
C4 *
C1
0.1μF
GND
6
REF
2
C6
0.01μF
R3
13.0k
PART
MAX750A
MAX758A
INPUT SUPPLY RANGE
(V)
6.0 to 11.0
6.0 to 16.0
10.2 to 16.0
GUARANTEED OUTPUT CURRENT AT 5V OUTPUT
(mA)
450
450
750
NOTE: PIN NUMBERS REFER TO 8-PIN PACKAGES.
* SEE TABLE 2 FOR EXTERNAL COMPONENT SUPPLIERS.
Figure 3. Standard Step-Down Circuit
and GND pins as possible . Also, place the output
capacitor as close to the inductor and the GND pin as
possible. The traces connecting the input and output
filter capacitors and the catch diode must be short to
minimize inductance and capacitance. For this reason,
avoid using sockets, and solder the IC directly to the
PC board. Use an uninterrupted ground plane if possi-
ble; otherwise, use a star ground connection.
Output-Ripple Filtering
A simple lowpass pi-filter (Figure 3) can be added to
the output to reduce output ripple to about 5mVp-p.
The cutoff frequency with the values shown is 21kHz.
Since the filter inductor is in series with the circuit out-
put, its resistance should be kept to a minimum so the
voltage drop across it is not excessive.
______________________________________________________________________________________
11
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