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参数资料
| 型号： | MAX1724EZK50-T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SYNC 5V .15A TSOT23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 0.8 V ~ 5.5 V |
| 电流 - 输出： | 150mA |
| 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： | SOT-23-5 细型，TSOT-23-5 |
| 包装： | 剪切带 (CT) |
| 供应商设备封装： | TSOT-23-5 |
| 其它名称： | MAX1724EZK50-TCT |
MAX1722/MAX1723/MAX1724
1.5μA I Q , Step-Up DC-DC Converters in TSOT
For maximum output current, choose the inductor value
so that the controller reaches the current-limit before
INPUT
0.8V TO V OUT
10 μ H
the maximum on-time is triggered:
10 μ F
BATT
LX
OUT
OUTPUT
2V TO 5.5V
L <
V BATT t ON ( MAX )
I LIM
where the maximum on-time is typically 5μs, and the
MAX1722
R2
10 μ F
current limit (I LIM ) is typically 500mA (see Electrical
Characteristics table).
FB
For larger inductor values, determine the peak inductor
GND
Figure 7. Adjustable Output Circuit
R1
current (I PEAK) by:
I PEAK =
V BATT t ON ( MAX )
L
Inductor Selection
The control scheme of the MAX1722/MAX1723/
INPUT
0.8V TO V OUT
10 μ H
MAX1724 permits flexibility in choosing an inductor. A
10μH inductor value performs well in most applications.
Smaller inductance values typically offer smaller physi-
cal size for a given series resistance, allowing the
smallest overall circuit dimensions. Circuits using larger
inductance values may start up at lower battery volt-
C1
10 μ F
BATT
MAX1724
LX
OUT
OUTPUT
V OUT (NOM)
C2
10 μ F
ages, provide higher efficiency, and exhibit less ripple,
but they may reduce the maximum output current. This
occurs when the inductance is sufficiently large to pre-
vent the maximum current limit (I LIM ) from being
ON
OFF
SHDN
GND
reached before the maximum on-time (t ON(MAX) )
expires.
Table 1. Suggested Inductors and
Suppliers
Figure 8. MAX1724 Standard Application Circuit
The inductor’s incremental saturation current rating should
MANUFACTURER
Coilcraft
Murata
Sumida
INDUCTOR
DO1608 Series
DO1606 Series
LQH4C Series
CDRH4D18 Series
CR32 Series
CMD4D06 Series
PHONE
WEBSITE
847-639-2361
www.coilcraft.com
770-436-1300
www.murata.com
847-545-6700
www.sumida.com
be greater than the peak switching current. However, it is
generally acceptable to bias the inductor into saturation
by as much as 20%, although this will slightly reduce effi-
ciency. Table 1 lists suggested inductors and suppliers.
Maximum Output Current
The maximum output current depends on the peak induc-
tor current, the input voltage, the output voltage, and the
overall efficiency ( η ):
I PEAK ? BATT ? η
Sumitomo/
Daidoo Electronics
Toko
CXLD140 Series
3DF Type
D412F Type
+81 (06) 6355-5733
www.daidoo.co.jp
847-297-0070
www.toko.com
I OUT ( MAX ) =
1
2
? V ?
? V OUT ?
Maxim Integrated
9
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| MAX1726EUK18 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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