CXSD62365通过消除传统电流模式PWMs中的电流感应电阻，以较低的成本实现了高效率。单级降压转换允许这些设备直接降压高压电池，以获得尽可能高的效率。内置5V LDO支持内部电路20毫安。
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产品概述 返回TOP
The CXSD62365 CXSD62366 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. The built-in 5V LDO supports 20mA for internal circuits. The GCXSD62365 CXSD62366is intended for the main power supply of LCD TV, Notebook Computer, or other low-voltage supplies as low as 0.75V. The CXSD62365 CXSD62366is available in QFN4X4-28 package.CXSD62365 CXSD62366is a 8A, synchronous DC/DC buck converter with integrated 20mΩ N-channel high-side MOSFET and 20mΩ N-channel low-side MOSFET. It uses constant on-time control scheme to handle wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency.
产品特点 返回TOP
„ Ultra-High Efficiency
„ Integrated 20mΩ at Vcc=5V N-Channel MOSFET for Low Side
„ Integrated 20mΩ at Vcc=5V N-Channel MOSFET for High Side
„ No Current-Sense Resistor (Lossless ILIMIT)
„ Quasi-PWM with 100ns Load-Step Response
„ 1% VOUT Accuracy Over Line and Load
„ Programmable Switching Frequency
„ Adjustable Output Range from 0.75V
„ 4.5V to 28V Adapter or Battery Input Range
„ Integrated Boost Switch
„ OVP & UVP
„ Over Temperature Protection (non-latch)
„ 3.3ms Soft-Start
„ Power-Good Indicator
„ Fixed 5V, 20mA Linear Regulator
应用范围 返回TOP
„ LCD Monitor/LCD TV
„ Notebook Computers
„ I/O Supply
„ Chipset/RAM Supply as Low as 0.75V
„ Networking Power Supply
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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Point Of Load(Synchronous Quasi-PWM Step Down Converter) |
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Part NO. |
Vin(V) min. |
Vin(V) max. |
Ilimit (V) |
FSW (kHz) |
FB(V) |
HSRON (mohm) |
LSRON (mohm) |
Note |
Package |
|
4.5 |
28 |
10 |
ADJ |
0.75 |
20 |
8.5 |
With 5V Supply, EN, PGOOD |
QFN4X4-28 QFN5X5-32 |
|
|
4.5 |
28 |
10 |
ADJ |
0.75 |
20 |
8.5 |
EN, PGOOD, ILMIT set by R |
QFN4X4-28 |
|
|
4.5 |
28 |
8 |
ADJ |
0.75 |
20 |
20 |
With 5V Supply, EN, PGOOD |
QFN4X4-28 QFN5X5-32 |
|
|
4.5 |
28 |
6 |
ADJ |
0.75 |
20 |
20 |
EN, PGOOD, ILMIT set by R |
QFN4X4-28 |
|
|
4.5 |
28 |
8 |
ADJ |
0.9 |
30 |
15 |
With 5V Supply, EN, PGOOD, Low Iq |
QFN3X3-21 |
|
|
4.5 |
28 |
4 |
ADJ |
0.9 |
30 |
30 |
With 5V Supply, EN, PGOOD, Low Iq |
QFN3X3-21 |
|
|
4.5 |
28 |
10 |
ADJ |
0.8 |
20 |
8.5 |
EN, PGOOD, MLCC, Soft Start adjustable |
QFN4X4-23 2 Thermal Pads |
|
|
5.5 |
28 |
8 |
ADJ |
5.05 |
20 |
17 |
5V System Power Rail,LDO5 Switchover5V,ON5, ENL,PGOOD,Low Iq,MLCC,Ultrasonic with VCLK |
QFN4X4-28 2 Thermal Pads |
|
|
5.5 |
28 |
10 |
ADJ |
5.05 |
20 |
8.5 |
5V System Power Rail, LDO5 Switchover5V, ON5 ENL,PGOOD,Low Iq,MLCC,Ultrasonic with VCLK |
QFN4X4-28, 2 Thermal Pads |
|
|
5.5 |
28 |
8 |
ADJ |
3.33 |
20 |
17 |
3V System Power Rail, LDO3 Switchover3V, ON3, ENL,PGOOD,Low Iq,MLCC,Ultrasonic with VCLK |
QFN4X4-28 2 Thermal Pads |
|
|
3 |
28 |
8 |
ADJ |
0.75 |
30 |
15 |
EN, PGOOD, Low Iq, MLCC |
QFN3X3-24 2 Thermal Pads |
|
|
5.5 |
28 |
8 |
ADJ |
0.9 |
30 |
15 |
With 5V Supply, EN, PGOOD, Low Iq, MLCC |
QFN3X3-24 2 Thermal Pads |
|
|
5.5 |
28 |
4 |
ADJ |
0.9 |
30 |
30 |
With 5V Supply, EN, PGOOD, Low Iq, MLCC |
QFN3X3-24 2 Thermal Pads |
|
|
3 |
28 |
10 |
ADJ |
0.75 |
20 |
8.5 |
EN, PGOOD, Low Iq, MLCC |
QFN4X4-28 2 Thermal Pads |
|
|
3 |
28 |
8 |
ADJ |
0.75 |
30 |
15 |
EN, PGOOD, Low Iq, MLCC |
QFN4X4-28 2 Thermal Pads |
|
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