CXSD62398采用电压模式反馈工作，并具有前馈输入电压补偿，可即时响应输入电压变化。内部700mV参考电压被调至1%，提供准确的输出电压。时钟频率、软启动和过电流限制都很容易由单个外部组件编程。过电压保护（OVP）可以通过设置外部电阻进行调整。实现输入欠压闭锁。
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产品概述 返回TOP
The CXSD62398 is a flexible asynchronous buck controller with a built in 200mA driver for P-channel FETs. The input voltage is up to 27V. The CXSD62398 operates with voltage-mode feedback and has feed-forward input-voltage compensation that responds instantly to input voltage change. The internal 700mV reference is trimmed to 1%, giving accurate output voltages. Clock frequency, soft-start, and overcurrent limit are each easily programmed by a single, external component. Over voltage protection (OVP) can be adjusted by setting the external resistors. Input under-voltage lockout is implemented. The CXSD62398 is available in 10-pin MSOP exposed pad package.
产品特点 返回TOP
„ Input Voltage: 4.5V to 27V
„ Output Voltage (700mV to 90% VIN)
„ 200mA Internal P-Channel FET Driver
„ Voltage Feed-Forward Compensation
„ Undervoltage Lockout
„ Hiccup Overcurrent Fault Recovery
„ Programmable Fixed Frequency (35~500KHz) Operation
„ Programmable Short Circuit Protection
„ 700 mV 1% Reference Voltage
„ Programmable Closed Loop Soft Start
„ Disable Function Available
„ Programmable Over-Voltage Protection
„ MSOP-10 with Exposed Pad Package Available
应用范围 返回TOP
„ Telecom
„ DSL/Cable Modems
„ Scanners
„ Power Applications
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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Synchronous Step Down Controller |
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|
Part NO. |
Vin(V) min |
Vin(V) max |
IOUT (A) |
FSW (kHz) |
FB (V) |
Duty max(%) |
VOUT (ms) |
Note |
Package |
|
2.5 |
5.5 |
-- |
300 |
1 |
100 |
15 |
EXT, VDD, GND, CE, FB, Voltage Mode |
SOT-23-5 |
|
|
5 |
12 |
OCSET |
300 |
0.8 |
-- |
14 |
BST, DH, GND, DL, VCC, FB, OC, LX |
SOP-8 |
|
|
-- |
24 |
OCSET |
300 |
0.8 |
-- |
8 |
BST, DH, GND, DL, VCC, FB, OC, LX |
SOP-8 |
|
|
10 |
28 |
-- |
400 |
0.8 |
80 |
3 |
VCC, DL, GND, DH, BST, LX, VIN, FB |
TSOT-23-8 |
|
|
5 |
23 |
OCSET |
400 |
0.8 |
80 |
8 |
DH, LX, DL, GND, FB, OC, VCC, BST |
SOP-8 |
|
|
4.5 |
27 |
RSENSE |
ADJ |
0.7 |
93 |
ADJ |
Asynchronous Voltage Mode Controller |
MSOP-10(FD) |
|
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