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UCC3588

更新时间: 2024-09-18 22:52:39
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
11页 182K
描述
5-Bit Programmable Output BiCMOS Power Supply Controller

UCC3588 数据手册

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UCC3588  
PRELIMINARY  
5-Bit Programmable Output BiCMOS Power Supply Controller  
FEATURES  
DESCRIPTION  
5-Bit Digital-to-Analog Converter  
(DAC) supports Intel Pentium II  
The UCC3588 synchronous step-down (Buck) regulator provides accurate  
high efficiency power conversion. Using few external components, the  
UCC1588 converts 5V to an adjustable output ranging from 3.5VDC to  
2.1VDC in 100mV steps and 2.05VDC to 1.3VDC in 50mV steps with 1%  
DC system accuracy. A high level of integration and novel design allow this  
16-pin controller to provide a complete control solution for today’s  
demanding microcontroller power requirements. Typical applications  
include on board or VRM based power conversion for Intel Pentium II  
microprocessors, as well as other processors from a variety of  
manufacturers. High efficiency is obtained through the use of synchronous  
rectification.  
Microprocessor VID Codes  
Compatible with 5V or 12V Systems  
1% Output Voltage Accuracy  
Guaranteed  
Drives 2 N-Channel MOSFETs  
Programmable Frequency to 800kHz  
Power Good OV / UV / OVP Voltage  
Monitor  
The softstart function provides a controlled ramp up of the system output  
voltage. Overcurrent circuitry detects a hard (or soft) short on the system  
output voltage and invokes a timed softstart/shutdown cycle to reduce the  
PWM controller on time to 5%.  
Undervoltage Lockout and Softstart  
Functions  
Short Circuit Protection  
Low Impedance MOSFET Drivers  
Chip Disable  
The oscillator frequency is externally programmed with RT and operates  
over a range of 50kHz to 800kHz. The gate drivers are low impedance to-  
tem pole output stages capable of driving large external MOSFETs. Cross  
conduction is eliminated by fixed delay times between turn off and turn on  
of the external high side and synchronous MOSFETs. The chip includes  
undervoltage lockout circuitry which assures the correct logic states at the  
outputs during power up and power down.  
(continued)  
APPLICATION DIAGRAM  
12V IN  
5V IN  
+
C15  
150µF  
C16  
10µF  
R1  
10K  
R4  
3Ω  
UCC3588  
Q1  
IRL3103  
VCC  
DRVHI  
15  
11  
4
13  
L1  
R6  
0.003Ω  
+
+
+
+
1.6µH  
DRVLO 14  
C8-C12 1500µF  
PWRGOOD  
D0  
VOUT  
C1-C4  
1500µF  
C1 C2 C3 C4  
R5  
3Ω  
D0  
D1  
D2  
D3  
D4  
ISNS  
2
Q2  
IRL3103  
D1  
VSENSE  
VFB  
5
1
10  
9
D2  
6
+
+
+
+
+
+
C6  
220pF  
R3  
200k  
D3  
COMP  
C14  
150µF  
7
C8  
C9  
C10  
C11  
C12  
D4  
C7 22pF  
8
D1 D2  
SS/ENBL  
GND  
3
12  
RT  
16  
R7  
15k  
R8  
20k  
C5  
33nF  
R2  
47k  
C13  
1nF  
RTN  
RTN  
UDG-98158  
SLUS311 - JULY 1999  

UCC3588 替代型号

型号 品牌 替代类型 描述 数据表
UCC3882-1 TI

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