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| 型号： | MAX8640ZEXT18+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1.8V .5A SC70-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.8V |
| 输入电压： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 4MHz |
| 电流 - 输出： | 500mA |
| 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： | 6-TSSOP，SC-88，SOT-363 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | SC-70-6 |
ATION
EVALU
AVAILA
19-3997; Rev 4; 2/09
KIT
B LE
Tiny 500mA, 4MHz/2MHz Synchronous
Step-Down DC-DC Converters
General Description
Features
The MAX8640Y/MAX8640Z step-down converters are
optimized for applications where small size, high effi-
ciency, and low output ripple are priorities. They utilize
a proprietary PWM control scheme that optimizes the
switching frequency for high efficiency with small exter-
nal components and maintains low output ripple volt-
age at all loads. The MAX8640Z switches at up to
4MHz to allow a tiny 1μH inductor and 2.2μF output
capacitor. The MAX8640Y switches at up to 2MHz for
higher efficiency while still allowing small 2.2μH and
4.7μF components. Output current is guaranteed up to
500mA, while typical quiescent current is 28μA.
Factory-preset output voltages from 0.8V to 2.5V elimi-
nate external feedback components.
Internal synchronous rectification greatly improves effi-
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Tiny SC70 and μ DFN Packages
500mA Guaranteed Output Current
4MHz or 2MHz PWM Switching Frequency
Tiny External Components: 1 μ H/2.2 μ F or
2.2 μ H/4.7 μ F
28 μ A Quiescent Current
Factory Preset Outputs from 0.8V to 2.5V
±1% Initial Accuracy
Low Output Ripple at All Loads
Ultrasonic Skip Mode Down to 1mA Loads
Ultra-Fast Line- and Load-Transient Response
Fast Soft-Start Eliminates Inrush Current
Ordering Information
ciency and replaces the external Schottky diode
required in conventional step-down converters. Internal
fast soft-start eliminates inrush current so as to reduce
input capacitor requirements.
The MAX8640Y/MAX8640Z are available in the tiny 6-
pin, SC70 (2.0mm x 2.1mm) and μDFN (1.5mm x
1.0mm) packages. Both packages are lead-free.
Applications
Microprocessor/DSP Core Power
I/O Power
Cell Phones, PDAs, DSCs, MP3s
PART*
MAX8640Y EXT08+T
MAX8640YEXT10+T
MAX8640YEXT11+T
MAX8640YEXT12+T
MAX8640YEXT13+T
MAX8640YEXT15+T
MAX8640YEXT16+T
MAX8640YEXT18+T
MAX8640YEXT19+T
PIN-
PACKAGE
6 SC70
6 SC70
6 SC70
6 SC70
6 SC70
6 SC70
6 SC70
6 SC70
6 SC70
TOP MARK
ACQ
ADF
ACR
ACS
ACG
ADD
ADB
ACI
ACH
Other Handhelds Where Space Is Limited
Typical Operating Circuit
MAX8640YEXT82+T 6 SC70 ADJ
*Contact factory for availability of each version. For 2.85V output
(82 version), request application note that includes limitations
and typical operating characteristics.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Note: All devices are specified over the -40°C to +85°C
operating temperature range.
Ordering Information continued and Selector Guide appears
at end of data sheet.
Pin Configurations
LX
INPUT
2.7V TO 5.5V
C1
2.2 μ F
IN
MAX8640Y
LX
L1
1 μ H OR 2.2 μ H
OUTPUT
0.8V TO 2.5V
UP TO 500mA
LX
GND
1
2
+
MAX8640Y
MAX8640Z
6
5
TOP VIEW
IN
GND
GND
+
1
2
MAX8640Y
MAX8640Z
6
5
IN
GND
GND MAX8640Z OUT
ON/OFF
SHDN
C2
2.2 μ F OR
4.7 μ F
OUT
3
SC70
4
SHDN
OUT
3
μ DFN
4
SHDN
2.0mm x 2.1mm
1.5mm x 1.0mm
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8640ZEXT19+T | 功能描述:直流/直流开关转换器 500mA 4/2MHz Synch Step-Down DC/DC Conv 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 |
| MAX8640ZEXT25+ | 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP DOWN 6PIN SC-70 - Cut Tape Product |
| MAX8640ZEXT25+T | 功能描述:直流/直流开关转换器 500mA 4/2MHz Synch Step-Down DC/DC Conv 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 |
| MAX8643AETG/V+ | 功能描述:直流/直流开关调节器 3A 2MHz Step-Down Regulator w/Switch RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX8643AETG/V+T | 功能描述:直流/直流开关调节器 3A 2MHz Step-Down Regulator w/Switch RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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