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MAX16975

更新时间： 2023-12-20 18:46:13
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
17页 782K
描述
28V、1.2A汽车应用降压型转换器，具有低工作电流

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MAX16975 数据手册

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MAX16975  
28V, 1.2A Automotive Step-Down Converter  
with Low Operating Current  
General Description  
Features  
The MAX16975 is a 1.2A current-mode step-down con-  
verter with an integrated high-side switch. The device  
operates with input voltages from 3.5V to 28V while using  
only 45FA quiescent current at no load. The switching  
frequency is adjustable from 220kHz to 1.0MHz by using  
an external resistor, and can be synchronized to an exter-  
nal clock. The device’s output voltage is pin-selectable to  
a fixed 5V or adjustable from 1V to 10V using external  
resistors. The wide input voltage range makes the device  
ideal for automotive and industrial applications.  
S Wide 3.5V to 28V Input Voltage Range  
S 42V Input Transient Tolerance  
S 5V Fixed or 1V to 10V Adjustable Output Voltage  
S Integrated 1.2A High-Side Switch  
S 220kHz to 1.0MHz Adjustable Switching Frequency  
S Frequency Synchronization Input  
S Internal Boost Diode  
S 45µA Skip-Mode Operating Current  
The device operates in skip mode for reduced current  
consumption in light-load conditions. An adjustable  
reset threshold helps keep microcontrollers alive down  
to the lowest specified input voltage. Protection features  
include cycle-by-cycle current limit, soft-start, overvolt-  
age, and thermal shutdown with automatic recovery.  
The device also features a power-good monitor to ease  
power-supply sequencing.  
S Less than 10µA Shutdown Current  
S Adjustable Power-Good Output Level and Timing  
S 3.3V Logic Level to 42V Compatible Enable Input  
S Current-Limit, Thermal Shutdown, and  
Overvoltage Protection  
S -40°C to +125°C Automotive Temperature Range  
Applications  
The device is available in 16-pin QSOP and thermally  
enhanced QSOP-EP packages. It operates over the  
-40°C to +125°C automotive temperature range.  
Automotive  
Industrial  
Ordering Information appears at end of data sheet.  
Typical Application Circuit  
3.5V TO 28V  
C
47µF  
C
4.7µF  
C
IN3  
0.1µF  
IN1  
IN2  
C
0.1µF  
BST  
SUP  
SUPSW  
BST  
L1  
10µH  
V
= 1.25V AT  
OUT  
EN  
1.2A AT 400kHz  
LX  
FSYNC  
COMP  
V
OUT  
R
C
47µF  
C
OUT2  
47µF  
FB1  
OUT1  
D1  
25kI  
C
COMP1  
OUT  
5600pF  
C
COMP2  
OPEN  
MAX16975  
RESETI  
R
FOSC  
R
COMP  
12kI  
61.9kI  
V
BIAS  
FOSC  
R
FB2  
FB  
R
RES  
100kI  
10kI  
BIAS  
RES  
C
BIAS  
1µF  
CRES  
GND  
C
PLACE C (0.1µF) RIGHT NEXT TO SUP.  
IN3  
CRES  
1nF  
For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAX16975.related  
For pricing, delivery, and ordering information, please contact Maxim Direct  
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.  
19-5673; Rev 1; 10/13  
1234567...17

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