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MD1422N PDF预览

MD1422N

更新时间: 2024-01-12 14:10:34
品牌 Logo 应用领域
新电元 - SHINDENGEN 转换器开关光电二极管DC-DC转换器
页数 文件大小 规格书
2页 41K
描述
high-efficiency step down DC-DC converter

MD1422N 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Obsolete零件包装代码:SSOP
包装说明:SSOP, SOP32,.4,32针数:32
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.73
Is Samacsys:N模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:40 V最小输入电压:8 V
标称输入电压:24 VJESD-30 代码:R-PDSO-G32
JESD-609代码:e0长度:13.6 mm
湿度敏感等级:2功能数量:1
端子数量:32最高工作温度:85 °C
最低工作温度:-30 °C最大输出电流:4 A
封装主体材料:PLASTIC/EPOXY封装代码:SSOP
封装等效代码:SOP32,.4,32封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, SHRINK PITCH峰值回流温度(摄氏度):240
认证状态:Not Qualified座面最大高度:2.5 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:BUCK最大切换频率:287.5 kHz
技术:CMOS温度等级:OTHER
端子面层:TIN LEAD端子形式:GULL WING
端子节距:0.8 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:7.5 mm
Base Number Matches:1

MD1422N 数据手册

 浏览型号MD1422N的Datasheet PDF文件第2页 
2 .5 V-1 2 V Output MD1422N  
14.1MAX  
Dimensions = mm  
DES CRIP TION  
13.6 +  
0.1  
The MD1422N is a high-efficiency step down DC-DC converter  
power integrated circuit with main MOSFET switch and synchronous  
rectification MOSFET. The MD1422N can deliver high efficiency over  
a wide input voltage range. This device has output voltage digitally  
selectable from 2.5V to 12V. With the MD1422N you can construct a  
complete DC-DC converter using only a few external components.  
Featuring an SSOP 32-pin surface mount package, the MD1422N  
allows you to incorporate a very small and thin power supply on your  
circuit board.  
32  
17  
Company Name  
Type No.  
SHINDENGEN  
MD1422N  
5038N  
1
16  
0.16  
Lot No.  
M
+
0.1  
0.35 –  
(0.8)  
0.8  
BLOCK DIAGRAM  
FEATURES  
High efficiency  
Vcc  
VG  
VDD  
Vref  
VB  
25  
Vboot  
8
18~21  
23  
28  
6
Wide input voltage load range  
8VDC to 40VDC  
R/C  
UVLO  
START = 7.2V  
STOP = 6.7V  
High side  
Vref=Vout+5.8V  
ON/OFF  
circuit  
BOOT Reference  
Vref=6.5V  
5
Up to 3ADC  
100˚C 150˚C  
High side  
Driver  
Reference  
High-Low MOS  
synchro-OFF  
Output voltage selectable function  
2.5V to 12V  
TSD  
+
Vref=5V 5%  
Error amp  
VOUT  
11~14  
PWM Comp  
+
High-Low MOS  
synchro-ON Prevention  
Internal Switching power device  
Main MOSFET for switch and  
synchronous rectification MOSFET  
Fixed 250kHz PWM frequency  
(Without external resistor and capacitor)  
Overcurrent protection  
+
Low side  
Vref=6.5V  
3V  
1V  
2.45V  
Low side  
Driver  
Q
OSC  
f=250kHz  
+
R
S
P.GND  
16  
CLM Vth=  
0.1~0.2V  
32  
amp–  
30  
1
2
3
OCLOCL+  
4,26  
GND  
9
ampOUT  
S/S  
VGL  
Thermal shutdown function  
Remote control ON/OFF  
P IN AS S IGNMENT  
30  
31  
32  
AmpOUT  
N/C  
Error Amp out  
P in #  
S ym b o l  
Fu n c t io n d e s c rip t io n  
Capacitor for softstart  
Non-connection  
Error Amp (-) input  
1
S/S  
OCL-  
OCL+  
GND  
R/C  
amp-  
2
Overcurrent protection (OCL) (-)  
Overcurrent protection (OCL) (+)  
Signal GND  
3
4
S/S : 1  
OCL: 2  
OCL+ : 3  
GND : 4  
R/C : 5  
VCC : 6  
N/C : 7  
Vboot : 8  
VGL : 9  
N/C : 10  
VOUT: 11  
VOUT: 12  
VOUT: 13  
VOUT: 14  
N/C : 15  
32 : amp-  
31 : N/C  
30 : ampOUT  
29 : N/C  
28 : Vref  
27 : VTS  
26 : GND  
25 : VB  
24 : N/C  
23 : VGH  
22: N/C  
21: VDD  
20: VDD  
19: VDD  
18 : VDD  
17 : N/C  
5
Remote ON/OFF control terminal  
Input voltage  
6
Vcc  
7
N/C  
Non-connection  
8
Vboot  
VGL  
High side drive supply for main MOS  
Low side MOSFET gate terminal  
Non-connection  
9
10  
11 ~ 14  
15  
16  
17  
18 ~ 21  
22  
23  
24  
25  
26  
27  
28  
29  
N/C  
VOUT  
N/C  
Power stage output  
Non-connection  
P.GND  
N/C  
Power GND  
P.GND : 16  
Non-connection  
VDD  
Drain of main MOS Switch  
Non-connection  
Vref - Temperature compensated internal voltage. You can pull 1mA  
N/C  
maximum for external circuit.  
VGH  
Main switch high side MOSFET gate terminal  
Non-connection  
OSC - MCD1422N uses internal oscillator without external component.  
N/C  
Frequency (Saw tooth wave form) is trimmed to 250kHz on chip.  
VB  
Bootstrap capacitor between VB and VOUT  
Signal GND  
Error Amp - Error Amp detects output voltage of DC-DC converter  
and controls PWM signal. You can adjust the loop gain when you  
connect feedback resistor and capacitor between AmpOUT and  
Amp (-). It will provide stable phase compensation.  
GND  
VTS  
Vref  
N/C  
Output voltage selectable terminal  
Internal voltage reference  
Non-connection  
Overcurrent protection - MD1422N uses pulse-by-pulse current  
protection. Current will be sensed voltage drop of external current  
sensing resistor. Threshold of OCL is 0.19V.  
1 - 8 0 0 - 6 3 4 - 3 6 5 4  

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