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| 型号： | MAX1709EUI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BST 3.3/5V/ADJ 4A 28TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 3.3V，5V，可调 |
| 输入电压： | 0.7 V ~ 5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 350kHz ~ 1MHz |
| 电流 - 输出： | 4A |
| 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： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
19-1724; Rev 2; 4/07
ATION
EVALU
AVAILA
KIT
B LE
4A, Low-Noise, High-Frequency,
Step-Up DC-DC Converter
General Description
The MAX1709 sets a new standard of space savings for
high-power, step-up DC-DC conversion. It delivers up
to 20W at a fixed (3.3V or 5V) or adjustable (2.5V to
5.5V) output, using an on-chip power MOSFET from a
+0.7V to +5V supply.
Fixed-frequency PWM operation ensures that the
switching noise spectrum is constrained to the 600kHz
fundamental and its harmonics, allowing easy postfilter-
ing for noise reduction. External clock synchronization
capability allows for even tighter noise spectrum con-
trol. Quiescent power consumption is less than 1mW to
extend operating time in battery-powered systems.
Two control inputs (ONA, ONB ) allow simple push-on,
push-off control through a single momentary pushbut-
ton switch, as well as conventional on/off logic control.
The MAX1709 also features programmable soft-start
and current limit for design flexibility and optimum per-
formance with batteries.
The MAX1709 is supplied in both a high-power TSSOP
Features
o On-Chip 10A Power MOSFET
o 5V, 4A Output from a 3.3V Input
o Fixed 3.3V or 5V Output Voltage or
Adjustable (2.5V to 5.5V)
o Input Voltage Range Down to 0.7V
o Low Power Consumption
1mW Quiescent Power
1μA Current in Shutdown Mode
o Low-Noise, Constant Frequency Operation
(600kHz)
o Synchronizable Switching Frequency
(350kHz to 1000kHz)
Ordering Informations
package, which allows a 10A RMS switch current and a
4A output, and a narrow SO package, which supplies a
2.4A output with a switch rated at 6A RMS . Although the
narrow SO device has a lower RMS switch rating, it has
PART
MAX1709ESE
MAX1709EUI+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 Narrow SO
28 TSSOP-EP*
the same peak switch current rating as the TSSOP
device, and so can supply 4A loads intermittently. If
loads of 2A or less are required, refer to the MAX1708.
________________________Applications
Routers, Servers, Workstations, Card Racks
Local 2.5V to 3.3V or 5V Conversion
+Indicates lead(Pb)-free/RoHS-compliant package.
*Exposed pad.
Pin Configuration
TOP VIEW
Local 3.3V to 5V Conversion
3.6V or 5V RF PAs in Communications Handsets
ONA 1
LX 2
LX 3
28 ONB
27 CLK
26 3.3/5
INPUT
1V TO 5V
Typical Operating Circuit
1 μ H
LX 4
LX 5
LX 6
LX 7
LX 8
MAX1709
25 NC
24 NC
23 PGND
22 PGND
21 PGND
OFF ON
ONA
LX
OUTPUT
3.3V, 5V,
NC 9
20 PGND
SYNC
OR
INTERNAL
CLK
SS/LIM
MAX1709
GND
OR ADJ
UP TO 4A
NC 10
GND 11
SS/ILM 12
19 PGND
18 PGND
17 NC
REF
OUT
REF 13
GND 14
16 FB
15 OUT
TSSOP-EP*
________________________________________________________________ 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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| MAX170ACPA+ | 功能描述:模数转换器 - ADC 12-Bit 115ksps 5.25V- Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX170ACWE | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX170ACWE+ | 功能描述:模数转换器 - ADC Serial Output 5.6 Micro Seconds 12-Bit ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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