参数资料
型号: MAX1714AEEP+T
厂商: Maxim Integrated Products
文件页数: 11/24页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 20-QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 600kHz
占空比: 100%
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: -40°C ~ 85°C
封装/外壳: 20-SSOP(0.154",3.90mm 宽)
包装: 带卷 (TR)
High-Speed Step-Down Controller
for Notebook Computers
IN
2V TO 28V
V+
I LIM
TOFF
MAX1714
+5V
TON
ON-TIME
COMPUTE
FROM
OUT
Q
1-SHOT
TRIG
9R
R
BST
TON
S
Q
TRIG
1-SHOT
Q
R
CURRENT
LIMIT
DH
ERROR
Σ
LX
SKIP
SHDN
REF
AMP
ZERO CROSSING
V DD
+5V
OUTPUT
DL
S
R
Q
(MAX1714B ONLY)
PGND
(GND)
MAX1714A ONLY
x2
OUT
+5V
REF
-6%
PGOOD
REF
+12%
S1
REF
-30%
FEEDBACK
MUX
(SEE FIGURE 9)
CHIP
SUPPLY
2V
REF
V CC
REF
OVP/UVLO
Q
S2
TIMER
(GND)
AGND
LATCH
FB
NOTE: IN THE MAX1714B, AGND AND PGND ARE INTERNALLY CONNECTED TO THE GND PIN.
Figure 2. MAX1714 Functional Diagram
( ) ARE FOR THE MAX1714B ONLY.
On-Time One-Shot (TON)
The heart of the PWM core is the one-shot that sets the
high-side switch on-time. This fast, low-jitter, adjustable
one-shot includes circuitry that varies the on-time in
response to battery and output voltage. The high-side
switch on-time is inversely proportional to the battery
voltage as measured by the V+ input, and proportional
to the output voltage. This algorithm results in a nearly
constant switching frequency despite the lack of a fixed-
frequency clock generator. The benefits of a constant
switching frequency are twofold: first, the frequency can
be selected to avoid noise-sensitive regions such as the
455kHz IF band; second, the inductor ripple-current
operating point remains relatively constant, resulting in
easy design methodology and predictable output volt-
age ripple.
On-Time = K (V OUT + 0.075V) / V IN
______________________________________________________________________________________
11
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相关代理商/技术参数
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MAX1714AEEP-TG068 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX1714AEVKIT 功能描述:电流型 PWM 控制器 Evaluation Kit for the MAX1714A 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
MAX1714BEEE 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
MAX1714BEEE+ 功能描述:电流型 PWM 控制器 Step-Down Controller for Notebook 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
MAX1714BEEE+T 功能描述:电流型 PWM 控制器 Step-Down Controller for Notebook 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