参数资料
型号: MAX1897ETP+
厂商: Maxim Integrated Products
文件页数: 29/33页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM 20-TQFN
标准包装: 60
系列: Quick-PWM™
PWM 型: 控制器
输出数: 1
频率 - 最大: 550kHz
电源电压: 4.5 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: 0°C ~ 85°C
封装/外壳: 20-WQFN 裸露焊盘
包装: 管件
Quick-PWM Slave Controllers for
Multiphase, Step-Down Supplies
Typical Operating Circuit
5V BIAS
SUPPLY
REF
V DD
(V CC )*
(POL)*
SHDN
V+
BST
DH
LX
INPUT
OUTPUT
(MASTER)
ILIM
MAX1887
DL
FLOAT
(300kHz)
ILIM
(MASTER)
(MAX1897)*
(TON)*
LIMIT
PGND
CS+
CS-
FB
(MASTER)
COMP
GND
CM+
CM-
TRIG
MASTER CURRENT
SENSE RESISTOR
MASTER LOW-SIDE GATE DRIVER
( )* MAX1897 PINS ONLY
V DD bypass capacitor go; the master ’ s analog
ground plane where sensitive analog components,
the master ’ s GND pin and V CC bypass capacitor
go; and the slave ’ s analog ground plane where the
Pin Configurations (continued)
TOP VIEW
slave ’ s GND pin, and V CC bypass capacitor go.
The master ’ s GND plane must meet the PGND
plane only at a single point directly beneath the IC.
Similarly, the slave ’ s GND plane must meet the
ILIM 1
TRIG 2
CM+ 3
16 LIMIT
15 V+
14 BST
PGND plane only at a single point directly beneath
the IC. The respective master and slave ground
planes should connect to the high-power output
ground with a short metal trace from PGND to the
source of the low-side MOSFET (the middle of the
CM- 4
CS- 5
CS+ 6
COMP 7
MAX1887
13 LX
12 DH
11 V DD
10 DL
star ground). This point must also be very close to
the output capacitor ground terminal.
5) Connect the output power planes (V CORE and sys-
GND 8
QSOP
9
PGND
tem ground planes) directly to the output filter
capacitor positive and negative terminals with multi-
ple vias. Place the entire DC-DC converter circuit
as close to the CPU as is practical.
TRANSISTOR COUNT: 1422
PROCESS: BiCMOS
Chip Information
______________________________________________________________________________________
29
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MAX1897ETP+ 功能描述:电流型 PWM 控制器 Integrated Circuits (ICs) 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
MAX1897ETP+T 功能描述:电流型 PWM 控制器 Integrated Circuits (ICs) 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
MAX1897ETP-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
MAX1898EUB41 功能描述:电池管理 Linear Charger for 1-Cell Li+ Battery RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel
MAX1898EUB41+ 功能描述:电池管理 Linear Charger for 1-Cell Li+ Battery RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel