Datasheet > MAX1865UEEP-T

MAX1865UEEP-T

更新时间： 2024-11-06 19:46:03

品牌	Logo	应用领域
美信 - MAXIM		信息通信管理开关光电二极管
页数	文件大小	规格书
25页	378K
描述
Switching Controller, Current-mode, 0.5A, 120kHz Switching Freq-Max, BICMOS, PDSO20, 0.150 INCH, 0.025 INCH PITCH, QSOP-20

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MAX1865UEEP-T 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	QSOP
包装说明：	0.150 INCH, 0.025 INCH PITCH, QSOP-20	针数：	20
Reach Compliance Code：	not_compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.69
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：	28 V
最小输入电压：	4.5 V	标称输入电压：	12 V
JESD-30 代码：	R-PDSO-G20	JESD-609代码：	e0
长度：	8.65 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	20
最高工作温度：	85 °C	最低工作温度：	-40 °C
最大输出电流：	0.5 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	SSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	245
认证状态：	Not Qualified	座面最大高度：	1.73 mm
表面贴装：	YES	切换器配置：	PUSH-PULL
最大切换频率：	120 kHz	技术：	BICMOS
温度等级：	INDUSTRIAL	端子面层：	TIN LEAD
端子形式：	GULL WING	端子节距：	0.635 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	3.9 mm	Base Number Matches：	1

MAX1865UEEP-T 数据手册

19-2030; Rev 0; 4/01

xDSL/Cable Modem Triple/Quintuple Output

Power Supplies

General Description

Features

The MAX1864/MAX1865 power-supply controllers are

designed to address cost-conscious applications such

as cable modem Consumer Premise Equipment (CPE),

xDSL CPE, and set-top boxes. Operating off a low-cost,

unregulated DC supply (such as a wall adapter output),

the MAX1864 generates three positive outputs, and the

MAX1865 generates four positive outputs and one neg-

ative output to provide a cost-effective system power

supply.

ꢀ 4.5V to 28V Input Voltage Range

ꢀ Master DC-DC Step-Down Converter

Preset 3.3V or Adjustable (1.236V to 0.8 ✕ V )

Output Voltage

Fixed-Frequency (100kHz/200kHz) PWM

Controller

No Current-Sense Resistor

Adjustable Current Limit

95% Efficient

The MAX1864 includes a current-mode synchronous

step-down controller and two positive regulator gain

blocks. The MAX1865 has one additional positive gain

block and one negative regulator gain block. The main

synchronous step-down controller generates a

high-current output that is preset to 3.3V or adjustable

ꢀ Two (MAX1864)/Four (MAX1865) Analog

Gain Blocks

Positive Analog Blocks Drive Low-Cost PNP

Pass Transistors to Build Positive Linear

Regulators

from 1.236V to 0.8 ✕ V with an external resistive-

divider. The 100kHz/200kHz operating frequency

allows the use of low-cost aluminum-electrolytic capaci-

tors and low-cost power magnetics. Additionally, the

MAX1864/MAX1865 step-down controllers sense the

voltage across the low-side MOSFET’s on-resistance to

efficiently provide the current-limit signal, eliminating

the need for costly current-sense resistors.

Negative Analog Block (MAX1865) Drives a

Low-Cost NPN Pass Transistor to Build a

Negative Linear Regulator

ꢀ Power-Good Indicator

ꢀ Soft-Start Ramp for All Positive Regulators

The MAX1864/MAX1865 generate additional supply

rails at low cost. The positive regulator gain blocks use

an external PNP pass transistor to generate low-voltage

rails directly from the main step-down converter (such

as 2.5V or 1.8V from the main 3.3V output) or higher

voltages using coupled windings from the step-down

converter (such as 5V, 12V, or 15V). The MAX1865’s

negative gain block uses an external NPN pass transis-

tor in conjunction with a coupled winding to generate

-5V, -12V, or -15V.

Ordering Information

TEMP.

PIN-

OSC

PART

RANGE

PACKAGE

(kHz)

MAX1864TEEE

MAX1864UEEE

MAX1865TEEP

MAX1865UEEP

-40 C to +85 C

16 QSOP

20 QSOP

200

100

200

100

All output voltages are externally adjustable, providing

maximum flexibility. Additionally, the MAX1864/

MAX1865 feature soft-start for the step-down converter

and all the positive linear regulators, and have a power-

good output that monitors all of the output voltages.

Pin Configurations

TOP VIEW

POK

16 IN

COMP

OUT

15 VL

14 BST

Applications

xDSL, Cable, and ISDN Modems

Set-Top Boxes

MAX1864

13 DH

12 LX

11 DL

10 GND

FB2

Wireless Local Loop

FB3

ILIM

16 QSOP

Pin Configurations continued at end of data sheet.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...25

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与MAX1865UEEP-T相关器件

型号	品牌	获取价格	描述	数据表
MAX186ACAP	MAXIM	获取价格	Low-Power, 8-Channel, Serial 12-Bit ADCs
MAX186ACAP+	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 8 Channel, Serial Access, CMOS, PDSO20, SSO
MAX186ACAP+T	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 8 Channel, Serial Access, CMOS, PDSO20, SSO
MAX186ACAP-T	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 8 Channel, Serial Access, CMOS, PDSO20, SSO
MAX186ACPP	MAXIM	获取价格	Low-Power, 8-Channel, Serial 12-Bit ADCs
MAX186ACPP+	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 8 Channel, Serial Access, CMOS, PDIP20, PLA
MAX186ACWP	MAXIM	获取价格	Low-Power, 8-Channel, Serial 12-Bit ADCs
MAX186ACWP+T	MAXIM	获取价格	暂无描述
MAX186ACWP-T	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 8 Channel, Serial Access, CMOS, PDSO20, SO-
MAX186AEAP	MAXIM	获取价格	Low-Power, 8-Channel, Serial 12-Bit ADCs

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