参数资料
型号: MAX1634AEAI+T
厂商: Maxim Integrated Products
文件页数: 8/29页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 28-SSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,000
PWM 型: 电流模式,混合
输出数: 2
频率 - 最大: 330kHz
占空比: 99%
电源电压: 4.2 V ~ 30 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-SSOP(0.209",5.30mm 宽)
包装: 带卷 (TR)
Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
INPUT
ON/OFF
+5V ALWAYS ON
C3
10 Ω
0.1 μ F
0.1 μ F
4.7 μ F
V+ SHDN SECFB VL
4.7 μ F
BST5
SYNC
BST3
0.1 μ F
Q1
0.1 μ F
DH5
DH3
0.1 μ F
Q3
0.1 μ F
+5V OUTPUT
R1
L1
LX5
LX3
L2
R2
+3.3V OUTPUT
C1
*
Q2
DL5 MAX1631A
MAX1634A DL3
Q4
*
C2
PGND
CSH5
CSL5
CSH3
CSL3
FB3
FB5
RESET
RESET OUTPUT
5V ON/OFF
3.3V ON/OFF
TIME/ON5
RUN/ON3
SKIP
STEER
GND
REF
SEQ
+2.5V ALWAYS ON
1 μ F
*1A SCHOTTKY DIODE REQUIRED
FOR THE MAX1631A (SEE OUTPUT
OVERVOLTAGE PROTECTION SECTION).
Figure 1. Standard 3.3V/5V Application Circuit (MAX1631A/MAX1634A)
_______Standard Application Circuit
The basic MAX1631A/MAX1634A dual-output 3.3V/5V
buck converter (Figure 1) is easily adapted to meet a
wide range of applications with inputs up to 28V by
substituting components from Table 1. These circuits
represent a good set of tradeoffs between cost, size,
and efficiency, while staying within the worst-case
specification limits for stress-related parameters, such
as capacitor ripple current. Do not change the frequen-
cy of these circuits without first recalculating compo-
nent values (particularly inductance value at maximum
battery voltage). Adding a Schottky rectifier across
each synchronous rectifier improves the efficiency of
these circuits by approximately 1%, but this rectifier is
otherwise not needed because the MOSFETs required
for these circuits typically incorporate a high-speed sili-
con diode from drain to source. Use a Schottky rectifier
rated at a DC current equal to at least 1/3 of the load
current.
8
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MAX1634CAI 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
MAX1634CAI+ 功能描述:DC/DC 开关控制器 Multi-Out Low-Noise Power-Supply Ctlr 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
MAX1634CAI+T 功能描述:DC/DC 开关控制器 Multi-Out Low-Noise Power-Supply Ctlr 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
MAX1634CAI-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
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