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| 型号： | MAX1956ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/22页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 660kHz |
| 占空比： | 97% |
| 电源电压： | 1.6 V ~ 5.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
19-2623; Rev 0; 1/03
ATION
EVALU
AVAIL
KIT
ABLE
1.6V to 5.5V Input, 0.5% Accurate, Dual
180° Out-of-Phase Step-Down Controllers
General Description
The MAX1955/MAX1956 are dual-output, fixed-frequency,
voltage-mode, pulse-width modulated (PWM) step-down
controllers with 0.5% output accuracy. Each controller
switches at a constant 600kHz and is 180° out-of-phase
with the other controller, reducing input ripple current
and the number of input capacitors.
An on-chip bias supply generates a 5V gate drive to
deliver up to 25A output current per phase with low-cost
N-channel MOSFETs at up to 93% efficiency. Lossless
adjustable current limit eliminates expensive current-
sense resistors and improves efficiency. Foldback current
limit reduces power dissipation during short-circuit
conditions and handles transient overloads better than
controllers using hiccup-mode short-circuit protection.
Output voltage margining shifts output voltage by
±4% from the nominal value to simplify system test.
Outputs also can be powered up and down in select-
able sequences to meet core and logic supply-rail
requirements.
Features
o Operates from a 1.6V to 5.5V Supply (MAX1956)
o 0.5% Output Accuracy
o 0.8V to 0.9V IN Output Range
o Up to 25A per Phase Output Current
o On-Chip Boost Regulator Provides 5V Gate Drive
o Up to 93% Efficiency
o 180° Out-of-Phase Operation
o ±4% Voltage Margining
o Lossless, Foldback Current Limit
o Selectable Voltage Sequencing
o Synchronizable to External Clock
o Digital Soft-Start and Soft-Stop
o Small 28-Pin, 5mm ? 5mm Thin QFN Package
Ordering Information
The MAX1955/MAX1956 are available in a 28-lead thin
QFN package with exposed pad.
Applications
Base Stations
Telecom and Network Equipment
PART
MAX1955 ETI
MAX1956 ETI
* EP = Exposed pad.
TEMP RANGE
-40 ° C to +85 ° C
-40 ° C to +85 ° C
PIN-PACKAGE
28 Thin QFN-EP*
28 Thin QFN-EP*
Servers
Pin Configuration appears at end of data sheet.
DSP, ASIC, μP, and FPGA Supplies
Typical Operating Circuit
INPUT
1.6V TO 5.5V
IN
VDD
V DD
LXB
BST2
OUTPUT 2
OUTPUT 1
0.8V TO 0.9V IN
UP TO 25A
BST1
DH1
LX1
MAX1956
DH2
LX2
DL2
0.8V TO 0.9V IN
UP TO 25A
DL1
PGND
FB1
COMP1
FB2
COMP2
REF
SEQ
GND
SYNCHRONIZATION
ILIM1
ON/OFF
CLOCK
SYNC
EN
ILIM2
AV DD
VDD
VOLTAGE
MARGINING
________________________________________________________________ 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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|---|---|
| MAX1957EUB | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1957EUB+ | 功能描述:电流型 PWM 控制器 High-f Current-Mode PWM Buck Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1957EUB+T | 功能描述:电流型 PWM 控制器 High-f Current-Mode PWM Buck Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1957EUB-T | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX19586ETN | 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 |
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