参数资料
型号: MAX1956ETI+
厂商: Maxim Integrated Products
文件页数: 10/22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: 60
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:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 28-WFQFN 裸露焊盘
包装: 管件
1.6V to 5.5V Input, 0.5% Accurate, Dual
180° Out-of-Phase Step-Down Controllers
REF
AVDD
IN
VDD2
1.28V
BIAS
UVLO
GND
GND1
BOOST
CONTROL
LXB
PGND
COMP1
FB1
CONVERTER 1
BST1
DH1
CURRENT LIMIT
SOFT-
START DAC
EA
PWM
R
Q
LX1
AND
SHUTDOWN
S
Q
VDD1
DL1
VOLTAGE
EN
MARGINING
AND
SHUTDOWN
f SW
PGND1
SYNC
(2 x f SW )
OSCILLATOR
f SW
x0.15
5 μ A
SEQ
SEQUENCING
1V
4V
ILIM1
BST2
COMP2
FB2
CONVERTER 2
DH2
LX2
VDD2
DL2
PGND2
ILIM2
Figure 1. Functional Diagram
Detailed Description
The MAX1955/MAX1956 are dual-output, fixed-frequency,
voltage-mode, 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 con-
troller, which reduces input ripple current and the num-
ber of input capacitors. Figure 1 is the functional
diagram.
An on-chip step-up 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 condition and handles transient overloads
better than controllers using hiccup-mode short-circuit
protection.
10
______________________________________________________________________________________
相关PDF资料
PDF描述
MAX1639ESE+ IC REG CTRLR BUCK PWM CM 16-SOIC
MAX776ESA+ IC REG CTRLR INV PWM 8-SOIC
MAX5069DAUE+ IC REG CTRLR ISO PWM CM 16-TSSOP
MAX1745AUB+ IC REG CTRLR BUCK PWM 10-UMAX
SPD74-684M INDUCTOR SHIELDED 680.0UH SMD
相关代理商/技术参数
参数描述
MAX1956ETI+ 功能描述:DC/DC 开关控制器 Dual 180 Out Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX1956ETI+T 功能描述:DC/DC 开关控制器 Dual 180 Out Step-Down RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
MAX1956ETI-T 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
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