Datasheet > UC2870QTR-2

UC2870QTR-2

更新时间： 2024-11-01 20:10:51

品牌	Logo	应用领域
德州仪器 - TI		开关
页数	文件大小	规格书
10页	354K
描述
1A SWITCHING CONTROLLER, 300kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20

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技术参数
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UC2870QTR-2 技术参数

生命周期：	Obsolete	零件包装代码：	QLCC
包装说明：	QCCJ,	针数：	20
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.76
模拟集成电路 - 其他类型：	SWITCHING CONTROLLER	控制模式：	CURRENT-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	24 V
最小输入电压：	12 V	标称输入电压：	12 V
JESD-30 代码：	S-PQCC-J20	长度：	8.965 mm
功能数量：	1	端子数量：	20
最高工作温度：	85 °C	最低工作温度：	-25 °C
最大输出电流：	1 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	QCCJ	封装形状：	SQUARE
封装形式：	CHIP CARRIER	认证状态：	Not Qualified
座面最大高度：	4.57 mm	表面贴装：	YES
切换器配置：	PUSH-PULL	最大切换频率：	300 kHz
温度等级：	OTHER	端子形式：	J BEND
端子节距：	1.27 mm	端子位置：	QUAD
宽度：	8.965 mm	Base Number Matches：	1

UC2870QTR-2 数据手册

UC1870 -1/ -2

UC2870 -1/ -2

UC3870 -1/ -2

High Efficiency, Synchronous, Step-down (Buck) Controllers

FEATURES

DESCRIPTION

Not Recommended for New Designs.

• Operation to 36V Input Voltage

The UC3870 family of synchronous step-down (Buck) regulators provides

high efficiency power conversion from an input voltage range of 4.5 to 36

volts. The UC3870 is tailored for battery powered applications such as lap-

top computers, consumer products, communications systems, and aero-

space which demand high performance and long battery life. The

synchronous regulator replaces the catch diode in the standard buck regu-

lator with a low Rds(on) N-channel MOSFET switch allowing for significant

efficiency improvements. The high side N-channel MOSFET switch is

driven out of phase from the low side N-channel MOSFET switch by an

on-chip bootstrap circuit which requires only a single external capacitor to

develop the regulated gate drive. Fixed frequency, average current mode

control provides the regulator with inherent slope compensation, tight regu-

lation of the output voltage, and superior load and line transient response.

Switching frequencies up to 300kHz are possible.

• Fixed Frequency Average Current

Mode Control

• 2V to 3.5V Output Voltage when

Combined with UC3910 Precision

Reference/DAC

• Drives External N-Channel MOSFETs

for Highest Efficiency

• Sleep Mode Current <75mA

• Complementary 1 Amp Outputs with

Regulated Gate Drive Voltage

• LDO (Low Drop Out) Virtual 100%

The UC3870-1,-2 is designed to interface directly with precision references

like the UC3910. When combined with the UC3910, output voltages be-

tween 2V to 3.5V in 100mV increments and ± 1% accuracy are attainable.

This makes the UC3870-1,-2 ideal for powering high performance micro-

processors like the Intel Pentium Pro and others.

Duty Cycle Operation

• Non-Overlapping Gate Drives

(continued)

BLOCK DIAGRAM

UDG-96158

Pin Numbers refer to the DIL-18 Package.

8/98

12 3 4 5 6 7...10

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与UC2870QTR-2相关器件

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UC2871J	ETC	获取价格	Resonant-Mode SMPS Controller
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UC2871Q	TI	获取价格	FLUORESCENT LIGHT CONTROLLER, 78kHz SWITCHING FREQ-MAX, PQCC20, GREEN, PLASTIC, LCC-20
UC2871QG3	TI	获取价格	FLUORESCENT LIGHT CONTROLLER, 78kHz SWITCHING FREQ-MAX, PQCC20, GREEN, PLASTIC, LCC-20

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