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| 型号： | MAX1685EEE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/14页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 3.3V/ADJ 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 降压（降压） |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 3.3V，1.25 V ~ 14 V |
| 输入电压： | 2.7 V ~ 14 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 600kHz |
| 电流 - 输出： | 1A |
| 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： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 16-QSOP |
| 产品目录页面： | 1410 (CN2011-ZH PDF) |
19-1454; Rev 2; 7/01
ATION
EVALU
AVAILA
KIT
BLE
Low-Noise, 14V Input, 1A, PWM
Step-Down Converters
General Description
The MAX1684/MAX1685 are high-efficiency, internal-
switch, pulse-width modulation (PWM) step-down switch-
ing regulators intended to power cellular phones,
communicating PDAs, and handy-terminals. These
devices deliver a guaranteed 1A output current from two
lithium-ion (Li+) batteries. Their wide-input voltage range
of 2.7V to 14V gives design flexibility and allows batteries
to charge from a wall cube, since the ICs operate at the
higher voltages that occur when the battery is removed.
The output voltage is preset to 3.3V or can be externally
adjusted from 1.25V to V IN .
The low on-resistance power switch and built-in synchro-
nous rectifier provide high efficiencies of up to 96%.
There are four modes of operation: fixed-frequency, nor-
mal, low-power, and shutdown. The fixed-frequency
PWM mode of operation offers excellent noise character-
istics. The normal mode maintains high efficiency at all
loads. The low-power mode is used to conserve power in
standby or when full load is not required. The shutdown
mode is used to power down the device for minimal cur-
rent draw.
The MAX1684 runs at 300kHz for applications that
require highest efficiency. The MAX1685 runs at
600kHz to allow the use of smaller external compo-
nents. These devices can also be synchronized to an
external clock. Other features include a 100% duty
Features
o Up to 96% Efficiency
o 1A Guaranteed Output Current
o 100% Duty Cycle in Dropout
o 2.7V to 14V Input Range (15V Absolute Max)
o ±1% Accurate Reference Output
o 0.24 ? P-Channel On-Resistance
o Synchronizable Switching Frequency
o Fixed-Frequency PWM Operation
300kHz (MAX1684)
600kHz (MAX1685)
o 150μA Normal-Mode Quiescent Current
o 25μA Low-Power Mode Quiescent Current
o 2μA Shutdown Current
o Dual Mode? Fixed 3.3V (±1%) Output or
Adjustable Output (1.25V to V IN )
o Small 16-QSOP Package
o Auxiliary Output (CVL): 3V/5mA
Ordering Information
cycle for low-dropout applications, an auxiliary 3V/5mA
output, and a 1% accurate reference.
Both devices are available in a space-saving 16-QSOP
package. An evaluation kit is also available to help
PART
MAX1684 EEE
MAX1685 EEE
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 QSOP
16 QSOP
speed designs. For a similar device in a 10-pin μMAX
package with lower input voltage requirements (5.5V
max), refer to the MAX1692 data sheet.
Typical Operating Circuit
Applications
INPUT
OUTPUT
Cellular Phones
Two-Way Radios and Walkie-Talkies
Computer Peripherals
Personal Communicators
2.7V TO 14V
+
IN
AIN
SHDN
MAX1684
MAX1685
LX
GND
3.3V AT 1A
+
PDAs and Handy-Terminals
CVH
CVL
STBY
SYNC/PWM
BOOT
Pin Configuration appears at end of data sheet.
FB
CC
REF
Dual Mode is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas 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 |
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|---|---|
| MAX1685EEE+ | 功能描述:直流/直流开关转换器 14V 1A PWM Step-Down 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 |
| MAX1685EEE+T | 功能描述:直流/直流开关转换器 14V 1A PWM Step-Down 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 |
| MAX1685EEE-T | 功能描述:直流/直流开关转换器 14V 1A PWM Step-Down 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 |
| MAX1685EVKIT | 功能描述:电源管理IC开发工具 Evaluation Kit for the MAX1684 MAX1685 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX1686EUA | 功能描述:电荷泵 3-5V Regulating Chrg Pump For SIM Cards 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 |
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