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4.5V至24V电池输入PWM控制器恒导通控制方案CXSD62358驱动同步整流器FET恒定的开关频率
| 产品型号： | CXSD62358 |
| 产品类型： | DC-DC转换器 |
| 产品系列： | Buck降压型芯片 |
| 产品状态： | 量产 |
| 浏览次数： | 41 次 |
产品简介
技术参数
| 输入电压范围 (VIN) | ≤ 4.5~24V |
|---|---|
| 输出电压 (VOUT) | 0.75~3.6V |
| 输出电流 (IOUT) | 3.5AA |
| 工作频率 | ADJHz |
| 转换效率 | 96%% |
| 封装类型 | TQFN3X3-16 |
| Topology | Buck降压型芯片 |
| Control method | PWM/PFM |
| Switching frequency | ADJ |
| Protection | 过流/过压/过温 |
| Operating temp | -40℃~125℃ |
| Reference design | 反馈电压FB(V):0.75 |
产品详细介绍
目录
7.相关产品
产品概述 返回TOP
CXSD62358 PWM controller 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. The CXSD62358 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous rectifier MOSFETs. Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size. The CXSD62358 is intended for CPU core, chipset, DRAM, or other low-voltage supplies as low as 0.75V. CXSD62358 LDO controller can drive an external NMOSFET to provide a second output voltage from PWM output or other power source. It is adjusted output from 0.75V. The independent enable input, open-drain power good indicator, under-voltage protection and soft-start are provided for system application. The CXSD62358 is available in 16-pin TQFN (3X3) package
产品特点 返回TOP
--PWM Controller
„ Ultra-High Efficiency
„ No Current-Sense Resistor (Lossless ILIMIT)
„ Quasi-PWM with 100ns Load-Step Response
„ 1% VOUT Accuracy Over Line and Load
„ 0.75V to 3.6V Adjustable Output Range
„ 4.5V to 24V Battery Input Range
„ OVP & UVP
„ 1.7ms Soft-Start
„ Drives Large Synchronous-Rectifier FETs
„ Power-Good Indicator
--LDO Controller
„ 1.5% Accuracy Over Line and Load
„ Adjustable Output down to 0.75V
„ Independent Enable and Power Good Indicator
„ Drives N-channel MOSFET within Rail to Rail Controller Voltage
„ MLCC and POSCAP Stable
应用范围 返回TOP
„ Notebook Computers
„ CPU Core Supply
„ Chipset/RAM Supply as Low as 0.75V
„ 1.8V and 2.5V I/O Supply
„ 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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Synchronous (Quasi-PWM) Step Down Controller |
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|
Part NO. |
Vin(V) min. |
Vin(V) max. |
VOUT (V) |
FSW (k Hz) |
FB (V) |
Note |
Package |
|
3 |
28 |
0.7~1.8 |
300/400 |
0.8 |
EN, SS, PGOOD, OVP, UVP, OCP, VTTREF, Built-in BST diode, DDR1/2/3/3L, 2A LDO for VTT |
TQFN3X3-20 |
|
|
4.5 |
28 |
0.7~2.6 |
ADJ |
0.7 |
EN, PGOOD, OVP, UVP, OCP, VOUT Adjustable,1.5ms VOUT Servo Soft Start, 4700ppm/°C RON Coefficient |
TDFN3X3-10 |
|
|
4.5 |
28 |
0.5~3.3 |
ADJ |
0.5 |
EN, PGOOD, OVP, UVP, OCP, VOUT Adjustable, 1.5ms VOUT Servo Soft Start, 4700ppm/°C RON Coefficient |
TQFN2X2-12 |
|
|
4.5 |
24 |
0.75~3.6 |
ADJ |
0.75 |
EN, SS, PGOOD, OVP, UVP, OCP, Built-in BST diode |
TQFN3X3-16 |
|
|
4.5 |
24 |
0.75~3.6 |
ADJ |
0.75 |
EN, SS, PGOOD, OVP, UVP, OCP, Built-in BST diode |
TQFN3X3-16 |
|
|
4.5 |
24 |
0.75~3.6 |
ADJ |
0.75 |
EN, SS, PGOOD, OVP, UVP, OCP, Built-in BST diode |
TQFN3X3-16/TQFN3.5X3.5-14 |
|
|
2 |
24 |
0.75~3.6 |
400/ADJ |
0.75 |
EN, SS, PGOOD, OVP, UVP, OCP, VTTREF, Built-in BST diode, DDR1/2/3/3L, 3A/2A LDO for VTT |
TQFN4X4-24/TQFN3X3-20 |
|
|
4.5 |
24 |
0.75~3.6 |
ADJ |
0.75 |
EN, PGOOD, OVP, UVP, OCP, Built-in BST diode, SS, G0 & G1 Controls VOUT |
TQFN3X3-16 |
|
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