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| 型号： | MAX1724EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT STEP-UP MAX1722-MAX1724 |
| 产品培训模块： | Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步升 |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 3.3V，3.6V |
| 电流 - 输出： | 100mA |
| 输入电压： | 0.91 ~ 3.3 V |
| 稳压器拓扑结构： | 升压 |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX1722，MAX1723，MAX1724 |
MAX1722/MAX1723/MAX1724
1.5μA I Q , Step-Up DC-DC Converters in TSOT
Table 2. Suggested Surface-Mount Capacitors and Manufacturers (C1 and C2)
MANUFACTURER
AVX
Kemet
Sanyo
Taiyo Yuden
TDK
Vishay Sprague
CAPACITOR
VALUE
1 μ F to 10 μ F
10 μ F to 330 μ F
1 μ F to 22 μ F
10 μ F to 330 μ F
68 μ F to 330 μ F
33 μ F to 330 μ F
33 μ F to 330 μ F
1 μ F to 10 μ F
10 μ F to 330 μ F
DESCRIPTION
X7R Ceramic
TAJ Tantalum Series
TPS Tantalum Series
X5R/X7R Ceramic
T494 Tantalum Series
T520 Tantalum Series
TPC Polymer Series
X5R/X7R Ceramic
X7R Ceramic
594D Tantalum Series
595D Tantalum Series
PHONE
WEBSITE
843-448-9411
www.avxcorp.com
864-963-6300
www.kemet.com
408-749-9714
www.secc.co.jp
800-368-2496
www.t-yuden.org
847-803-6100
www.tdk.com
203-452-5664
www.vishay.com
For most applications, the peak inductor current equals
the current limit. However, for applications using large
inductor values or low input voltages, the maximum on-
time limits the peak inductor current (see Inductor
Selection section).
Capacitor Selection
Choose input and output capacitors to supply the input
and output peak currents with acceptable voltage rip-
ple. The input filter capacitor (C IN ) reduces peak cur-
rents drawn from the battery and improves efficiency.
Low equivalent series resistance (ESR) capacitors are
recommended. Ceramic capacitors have the lowest
ESR, but low ESR tantalum or polymer capacitors offer
a good balance between cost and performance.
Output voltage ripple has two components: variations
in the charge stored in the output capacitor with each
LX pulse, and the voltage drop across the capacitor’s
ESR caused by the current into and out of the capaci-
tor:
where I PEAK is the peak inductor current (see Inductor
Selection section). For ceramic capacitors, the output
voltage ripple is typically dominated by V RIPPLE(C) . For
example, a 10μF ceramic capacitor and a 10μH induc-
tor typically provide 75mV of output ripple when step-
ping up from 3.3V to 5V at 50mA. Low input-to-output
voltage differences (i.e. two cells to 3.3V) require high-
er output capacitor values.
Capacitance and ESR variation of temperature should
be considered for best performance in applications
with wide operating temperature ranges. Table 2 lists
suggested capacitors and suppliers.
PC Board Layout Considerations
Careful PC board layout is important for minimizing
ground bounce and noise. Keep the IC’s GND pin and
the ground leads of the input and output capacitors
less than 0.2in (5mm) apart using a ground plane. In
addition, keep all connections to FB
V RIPPLE RIPPLE ( C ) + V RIPPLE ( ESR )
V RIPPLE ( ESR ) ≈ I PEAK ESR ( COUT )
(MAX1722/MAX1723 only) and LX as short as possible.
= V
R
2 ? ( OUT - V BATT ) C OUT ? ?
( I PEAK OUT 2 )
10
V RIPPLE ( C ) ≈
1 ? L ?
? V
2 - I
Maxim Integrated
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相关代理商/技术参数 |
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| MAX1724EZK27 | 制造商:Maxim Integrated Products 功能描述:1.5UA IQ STEP-UP DC-DC CONVERTERS - Cut Tape Product |
| MAX1724EZK27+ | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP UP 5PIN TSOT-23 - Rail/Tube |
| MAX1724EZK27+T | 功能描述:直流/直流开关转换器 1.5uA IQ Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1724EZK27-T | 功能描述:直流/直流开关转换器 1.5uA IQ Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1724EZK30 | 制造商:Maxim Integrated Products 功能描述:1.5UA IQ STEP-UP DC-DC CONVERTERS - Rail/Tube |
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