参数资料
型号: MAX1716EEG+
厂商: Maxim Integrated Products
文件页数: 30/33页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 24-QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 50
PWM 型: 电流模式
输出数: 1
频率 - 最大: 550kHz
占空比: 100%
电源电压: 2 V ~ 28 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: 24-SSOP(0.154",3.90mm 宽)
包装: 管件
High-Speed, Adjustable, Synchronous Step-Down
Controllers with Integrated Voltage Positioning
+5V INPUT
BIAS SUPPLY
C5
1 μ F
R3
10 ?
C4
1 μ F
BATTERY (V BATT )
7V TO 24V
C IN
(4) 10 μ F
Q1: IRF7811
INTERNATIONAL RECTIFIER
Q2: (2) IRF7811
R4
INTERNATIONAL RECTIFIER
POWER-GOOD
INDICATOR
ON OFF
100k ?
V CC
VGATE
SHDN
V DD
V+
BST
D1
D1: CMPSH-3
CENTRAL SEMICONDUCTOR
D2: CMSH2-60
CENTRAL SEMICONDUCTOR
R6
100k ?
C1
0.22 μ F
R5
300k ?
C2
47pF
ILIM
REF
CC
SKIP
MAX1716
MAX1854
MAX1855
DH
LX
DL
C3
0.1 μ F
Q1
Q2
L1
1.0 μ H
D2
1.3V OUTPUT
UP TO 12A
C OUT
(4) 220 μ F
D0
CS
D1
D2
PGND
R SENSE
3.5m ?
R1
1k ?
R2
TO V CC
MAX1716 DAC CODE SHOWN
D3
D4
GND
VPS
FB
TON
FLOAT (300kHz)
2k ?
Figure 11. Low-Current Application (Circuit #2)
3) Group the gate-drive components (BST diode and
capacitor, V DD bypass capacitor) together near the
controller IC.
4) Make the DC-DC controller ground connections as
shown in Figure 1. This diagram can be viewed as
having three separate ground planes: output ground,
where all the high-power components go; the GND
plane, where the GND pin and V DD bypass capaci-
tors go; and an analog ground plane where sensitive
analog components go. The analog ground plane
and GND plane must meet only at a single point
directly beneath the IC. These two planes are then
connected to the high-power output ground with a
short connection from GND to the source of the low-
side MOSFET (the middle of the 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-
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.
___________________Chip Information
TRANSISTOR COUNT: 3729
30
______________________________________________________________________________________
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MAX1716EEG-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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