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| 型号： | MAX1673ESA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/8页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHD CAP INV ADJ 8SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 切换式电容器（充电泵），反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | -1.5 V ~ -5.5 V |
| 输入电压： | 2 V ~ 5.5 V |
| 频率 - 开关： | 350kHz |
| 电流 - 输出： | 125mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 8-SOIC |
| 产品目录页面： | 1410 (CN2011-ZH PDF) |
Regulated, 125mA-Output,
Charge-Pump DC-DC Inverter
V RIPPLE(ESR) = 8 ?? IN ? OUT ? ?? ?? 2
? ? ?
COUT
? f OSC ? ?
C FLY
?
? ?
R
??
V – V ESR
OUT
?
?
?
where C OUT is the output capacitor value, and f MIN is
the minimum oscillator frequency (250kHz). See Table
1 for a list of suggested capacitor suppliers.
Layout Considerations
V RIPPLE(ESR) = 2 ?? IN ? OUT ? ?? ??
? ? ? ?
?
1
? f OSC ? ? R OUT (C FLY + C OUT ) ??
The expression for the ripple component predominantly
due to charge transfer is:
V – V
? ? ? ?
where C FLY and C OUT are their respective capacitance
values, ESR COUT is the equivalent series resistance of
C OUT , R OUT is the MAX1673 open-loop output imped-
ance (typically 3.5 ? , and f OSC is the MAX1673 switch-
ing frequency (typically 350kHz). If ESR COUT is very
small, as is likely when ceramic capacitors are used,
V RIPPLE (TRANSFER) dominates. If ESR is relatively
large, as with low-cost tantalum capacitors, then V RIP-
PLE (ESR) dominates.
When operating in LIN mode, use the following equa-
tion to approximate peak-to-peak output voltage ripple:
The MAX1673’s high oscillator frequency requires good
layout technique, which ensures stability and helps
maintain the output voltage under heavy loads. Take
the following steps to ensure good layout:
? Mount all components as close together as possible.
? Place the feedback resistors R1 and R2 close to the
FB pin, and minimize the PC trace length at the FB
circuit node.
? Keep traces short to minimize parasitic inductance
and capacitance.
? Use a ground plane.
___________________Chip Information
TRANSISTOR COUNT: 386
SUBSTRATE CONNECTED TO: IN
I
2f C
V RIPPLE =
OUT
OSC
OUT
+ 2I OUT ESR COUT
where C OUT is the output capacitor value, ESR COUT is
the output capacitor’s ESR, and f OSC is the MAX1673
oscillator frequency (typically 350kHz).
To ensure LIN mode stability over the entire tempera-
ture range, choose a low-ESR (no more than 100m ? )
output capacitance using the following equation:
COUT = 75 x 10 - 6 ?
?
? R1 ?
? R1 + R2 ?
I OUT
Table 1. Partial Listing of Capacitor Vendors
PRODUCTION METHOD
Surface-Mount Tantalum
Surface-Mount Ceramic
MANUFACTURER
AVX
Matsuo
Sprague
AVX
Matsuo
SERIES
TPS
267
593D, 595D
X7R
X7R
PHONE
(803) 946-0690
(714) 969-2491
(603) 224-1961
(803) 946-0590
(714) 969-2491
FAX
(803) 448-2170
(714) 960-6492
(603) 224-1430
(803) 626-3123
(714) 960-6492
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
? 1998 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1673ESA+ | 功能描述:电荷泵 Regulated 125mA Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX1673ESA+T | 功能描述:电荷泵 Regulated 125mA Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX1673ESA-T | 功能描述:电荷泵 Regulated 125mA Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| MAX1674EUA | 功能描述:直流/直流开关转换器 Compact 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 |
| MAX1674EUA+ | 功能描述:直流/直流开关转换器 Compact 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 |
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