- 您现在的位置：买卖IC网 > PDF目录15155 > MAX1524EUT+T (Maxim Integrated Products)IC REG CTRLR BST FLYBK SOT23-6 PDF资料下载
参数资料
| 型号： | MAX1524EUT+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/14页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 90% |
| 电源电压： | 1.5 V ~ 5.5 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | SOT-6 |
| 包装： | 带卷 (TR) |
Simple SOT23 Boost Controllers
INPUT
3.3V ± 10%
R3
10 ?
C1
10 μ F
6.3V
L1
33 μ H
CR43-3R3
OUTPUT
C3
0.1 μ F
6 V CC
EXT
5
Q1
FDC633N
D1
CRS01
R1
100k ?
C FF
100pF
C2
33 μ F
10TPA33M
5V
1%
3
SET
MAX1524
FB
2
R2
OFF
ON
4
SHDN
GND
1
33.2k ?
1%
Figure 2. MAX1524 Standard Operating Circuit
V IN ( TYP ) × t ON ( TYP )
0 . 3 × I PEAK
I LOAD ( MAX ) × t ON
0 . 005 × V OUT
I LOAD ( MAX ) × t SS
Inductor Selection
For CCM, the ideal inductor value is given by:
L IDEAL =
If L IDEAL is not a standard value, choose the next-clos-
est value, either higher or lower. Nominal values within
50% are acceptable. Values lower than ideal will have
slightly higher peak inductor current; values greater
than ideal will have slightly lower peak inductor current.
Due to the MAX1522/MAX1523/MAX1524s’ high switch-
ing frequencies, inductors with a ferrite core or equiva-
lent are recommended. Powdered iron cores are not
recommended due to their high losses at frequencies
over 50kHz.
The saturation rating of the selected inductor should
C OUT ( MIN ) =
To properly control peak inductor current during the
3.2ms soft-start, the output bulk capacitance should be
less than:
C OUT ( MAX ) =
V OUT
where t SS = 3.2ms.
Because the MAX1522/MAX1523/MAX1524 are volt-
age-mode devices (and therefore do not require an
expensive current-sense resistor), cycle-to-cycle stabil-
ity is obtained from the output capacitor’s equivalent
series resistance (ESR). Choose an output capacitor
with actual ESR greater than:
meet or exceed the calculated value for I PEAK ,
although most coil types can be operated up to 20%
over their saturation rating without difficulty. In addition
ESR COUT >
L
C OUT
×
I LOAD ( MAX )
V IN ( MIN )
to the saturation criteria, the inductor should have as
low a series resistance as possible. The power loss in
the inductor resistance is approximately given by:
Additionally, to control peak inductor current during soft-
start, the output capacitor ’s ESR should be greater
than:
? I
+ V ) ?
× ( V
P LR ? ? LOAD OUT D ? × RL
? V IN ?
2
ESR COUT > 60 × 10 ? 3 ×
V FB
I PEAK
Usually, this prevents the use of ceramic capacitors in
Output Capacitor Selection
In CCM, to provide stable operation and to control out-
put sag to less than 0.5%, the output bulk capacitance
should be greater than:
CCM applications. Alternatives include tantalum, elec-
trolytic, and organic types such as Sanyo’s POSCAP.
The output capacitor must also be rated to withstand
the output voltage and the output ripple current, which
is equivalent to I PEAK . Since output ripple in boost DC-
DC designs is dominated by capacitor ESR, a capaci-
8
_______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1522EUT+T | IC REG CTRLR BST FLYBK SOT23-6 |
| MAX1954CEUB+T | IC REG CTRLR BUCK PWM CM 10-UMAX |
| CAT1162WI45 | IC SUPERVSR CPU 16K EEPROM 8SOIC |
| MAX1954BEUB+T | IC REG CTRLR BUCK PWM CM 10-UMAX |
| ISL88003IE46Z-T7A | IC VOLT SUPERVISOR 4.64V SC70-3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1526ETM | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1526ETM+ | 制造商:Maxim Integrated Products 功能描述:HIGHLY INTEGRATED LINEAR BATTERY CHARGER - Rail/Tube |
| MAX1526ETM+G104 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1526ETM+T | 制造商:Maxim Integrated Products 功能描述:HIGHLY INTEGRATED LINEAR BATTERY CHARGER - Tape and Reel |
| MAX1526ETM-G104 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
发布紧急采购，3分钟左右您将得到回复。