收藏本站
参数资料
型号： MAX1858EEG
厂商： MAXIM INTEGRATED PRODUCTS INC
元件分类： 稳压器
英文描述： Dual 180∑ Out-of-Phase PWM Step-Down Controller with Power Sequencing and POR
中文描述： DUAL SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO24
封装： 0.150 INCH, QSOP-24
文件页数： 8/22页
文件大小： 553K
代理商： MAX1858EEG
M
With dual, synchronized, out-of-phase operation, the
MAX1858A/MAX1875A/MAX1876As
’
high-side MOSFETs
turn on 180
°
out-of-phase. The instantaneous input cur-
rent peaks of both regulators no longer overlap, resulting
in reduced RMS ripple current and input voltage ripple.
This reduces the required input capacitor ripple-current
rating, allowing fewer or less expensive capacitors, and
reduces shielding requirements for EMI. The Out-of-
Phase Waveforms in the
Typical Operating Charac-
teristics
demonstrate synchronized 180
°
out-of-phase
operation.
Internal 5V Linear Regulator (V
L
)
All MAX1858A/MAX1875A/MAX1876A functions are
internally powered from an on-chip, low-dropout 5V
regulator. The maximum regulator input voltage (V+) is
23V. Bypass the regulator
’
s output (V
L
) with a 4.7μF
ceramic capacitor to PGND. The V
L
dropout voltage is
typically 500mV, so when V+ is greater than 5.5V, V
L
is
typically 5V. The MAX1858A/MAX1875A/MAX1876A
also employs an undervoltage lockout circuit that dis-
ables both regulators when V
L
falls below 4.2V. V
L
should also be bypassed to GND with a 0.1μF capaci-
tor. When V
L
falls and UVLO is tripped, the device is
latched and V
L
must be discharged below 2.5V before
normal operation can resume.
Dual 180° Out-of-Phase Buck Controllers with
Sequencing/Prebias Startup and POR
8
_______________________________________________________________________________________
V+
BST1
DH1
LX1
DL1
V
L
BST2
DH2
LX2
DL2
FB1
COMP1
*IRF7811W
**OPTIONAL
FB2
COMP2
PGND
REF
GND
OSC
SYNC
CKO
ILIM1
ILIM2
EN
OFF
ON
RESET OUTPUT
CLOCK OUTPUT
V
L
RST (MAX1858A/
MAX1876A ONLY)
MAX1858A
MAX1875A
MAX1876A
C
V+
0.22
μ
F
C
IN1
2
×
10
μ
F
C
OUT1
4
×
220
μ
F
N
H1*
N
L1*
L1
1.1
μ
H
OUTPUT1
V
OUT
= 1.8V
V
IN
6V - 23V
C
BST1
0.1
μ
F
R1A
8.06k
R1B
10k
10k
R
5.9k
C
COMP1A
0.01
μ
F
C
COMP1B
100pF
C
REF
0.22
μ
F
C
COMP2A
6800pF
C
COMP2B
100pF
R
8.2k
R2B
10k
96.5k
140k
R2A
15k
4.7
4.7
R
V+
4.7
N
L2*
**
**
N
H2*
L2
1.1
μ
H
CMPSH-3A
C
OUT2
4
220
μ
F
C
IN2
2
×
10
μ
F
OUTPUT2
V
OUT
= 2.5V
C
BST2
0.1
μ
F
C
VL
4.7
μ
F
0.1
μ
F
118k
D3
CMSSH-3
84.5k
D2
CMSSH-3
Figure 1. Standard 600kHz Application Circuit
相关PDF资料
PDF描述
MAX1858A-MAX1876A Dual 180∑ Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR
MAX1858A Dual 180?Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR
MAX1875A Dual 180?Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR
MAX1876A Dual 180?Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR
MAX1858AEEG Dual 180∑ Out-of-Phase Buck Controllers with Sequencing/Prebias Startup and POR
相关代理商/技术参数
参数描述
MAX1858EEG+ 功能描述:电压模式 PWM 控制器 Dual 180 Out Buck Controllers RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel
MAX1858EEG+T 功能描述:电压模式 PWM 控制器 Dual 180 Out Buck Controllers RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel
MAX1858EEG-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
MAX1858EVKIT 功能描述:DC/DC 开关控制器 Evaluation Kit for the MAX1858 MAX1875 MAX1876 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
MAX185ACNG 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
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*