MAX777LC/D

更新时间： 2024-11-03 22:22:59

品牌	Logo	应用领域
美信 - MAXIM		转换器稳压器开关式稳压器或控制器电源电路开关式控制器
页数	文件大小	规格书
12页	119K
描述
Low-Voltage Input, 3V/3.3V/5V/ Adjustable Output, Step-Up DC-DC Converters

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技术参数
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MAX777LC/D 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	DIE	包装说明：	DIE,
针数：	15	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.79	Is Samacsys：	N
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	控制模式：	CURRENT-MODE
控制技术：	PULSE FREQUENCY MODULATION	最大输入电压：	4.5 V
最小输入电压：	1.1 V	标称输入电压：	2.5 V
JESD-30 代码：	R-XUUC-N15	JESD-609代码：	e0
功能数量：	1	端子数量：	15
最高工作温度：	70 °C	最低工作温度：
最大输出电流：	1 A	封装主体材料：	UNSPECIFIED
封装代码：	DIE	封装形状：	RECTANGULAR
封装形式：	UNCASED CHIP	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	表面贴装：	YES
切换器配置：	BOOST	最大切换频率：	150 kHz
温度等级：	COMMERCIAL	端子面层：	TIN LEAD
端子形式：	NO LEAD	端子位置：	UPPER
处于峰值回流温度下的最长时间：	NOT SPECIFIED	Base Number Matches：	1

MAX777LC/D 数据手册

19-0186; Rev 2; 7/96

Lo w -Vo lt a g e In p u t , 3 V/3 .3 V/5 V/

Ad ju s t a b le Ou t p u t , S t e p -Up DC-DC Co n ve rt e rs

8/MAX79L

_______________Ge n e ra l De s c rip t io n

____________________________Fe a t u re s

♦ 1V to 4.5V Input Guarantees Start-Up Under Load

♦ Up to 210mA Output

The MAX777L/MAX778L/MAX779L are pulse-skipping DC-DC

converters that step up from low-voltage inputs (1V guaran-

teed). They require only three external components—an induc-

tor (typically 22µH) and two capacitors. The MAX777L delivers

a 5V output, the MAX778L generates pin-selectable voltages of

3.0V or 3.3V, and the MAX779L output can be adjusted from

2.5V to 6V through an external resistive divider.

♦ Load Fully Disconnected in Shutdown

♦ 82% Efficiency

♦ Output in Regulation with Input Voltage above

The devices include an Active Rectifier^TMthat eliminates the

need for an external catch diode, and permits regulation even

when the input is greater than the output. Also, unlike those in

other step-up converters, the MAX777L/MAX778L/MAX779L’s

Active Rectifier^TMturns off in the shutdown mode, disconnect-

ing the output from the source. This eliminates the current drain

associated with conventional step-up converters when off or in

shutdown.

Output Voltage

♦ Internal 1A Power Switch and Active Rectifier

♦ Adjustable Current Limit Allows Low-Cost

Inductors

♦ 190µA No Load Supply Current

♦ 20µA Shutdown Supply Current

High-frequency operation (up to 150kHz) allows the use of

small, surface-mount inductors with values of 10µH or less.

Supply current is 190µA under no load and only 20µA in stand-

by mode; supply voltage can range from 1V to 4.5V (1 to 3

cells). With a 2V input, the devices typically deliver 200mA at

5V, or 300mA at 3V.

♦ 3V/3.3V (MAX778L), 5V (MAX777L), and

Adjustable (MAX779L) Output Voltage

______________Ord e rin g In fo rm a t io n

PART

TEMP. RANGE

0°C to +70°C

PIN-PACKAGE

8 Plastic DIP

8 SO

For fully specified devices designed for step-up/step-down

applications (where the input can be above or below the out-

put), refer to the MAX877L/MAX878L/MAX879L data sheet.

MAX777LCPA

MAX777LCSA

MAX777LC/D

MAX777LEPA

MAX777LESA

MAX777LMJA

0°C to +70°C

Dice*

________________________Ap p lic a t io n s

-40°C to +85°C

-55°C to +125°C

8 Plastic DIP

8 SO

Single Battery-Cell (1V), Step-Up Voltage Conversion

Efficient, High-Power Step-Up Regulation from

Low Input Voltages

8 CERDIP**

Ordering Information continued at end of data sheet.

* Dice are specified at T = +25°C, DC parameters only.

Pagers

**Contact factory for availability and processing to MIL-STD-883.

Portable Instruments & Hand-Held Terminals

Notebook and Palmtop Computers

__________________P in Co n fig u ra t io n

__________Typ ic a l Op e ra t in g Circ u it

INPUT

1V TO 4.5V

TOP VIEW

22µF

22µH

ILIM

N.C. (MAX777L)

SHDN

OUT

MAX777L

ILIM

SHDN

MAX777L

MAX778L

MAX779L

AGND

PGND

OUTPUT

ON/OFF

OUT

100µF

PGND

AGND

DIP/SO

* SEL FOR MAX778L, FB FOR MAX779L.

Active Rectifier is a trademark of Maxim Integrated Products.

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

12 3 4 5 6 7...12

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与MAX777LC/D相关器件

型号	品牌	获取价格	描述	数据表
MAX777LCPA	MAXIM	获取价格	Low-Voltage Input, 3V/3.3V/5V/ Adjustable Output, Step-Up DC-DC Converters
MAX777LCSA	MAXIM	获取价格	Low-Voltage Input, 3V/3.3V/5V/ Adjustable Output, Step-Up DC-DC Converters
MAX777LCSA+	MAXIM	获取价格	暂无描述
MAX777LEPA	MAXIM	获取价格	Low-Voltage Input, 3V/3.3V/5V/ Adjustable Output, Step-Up DC-DC Converters
MAX777LESA	MAXIM	获取价格	Low-Voltage Input, 3V/3.3V/5V/ Adjustable Output, Step-Up DC-DC Converters
MAX777LESA+	MAXIM	获取价格	Switching Regulator, Current-mode, 1A, 150kHz Switching Freq-Max, PDSO8, 0.150 INCH, SOIC-
MAX777LMJA	MAXIM	获取价格	Low-Voltage Input, 3V/3.3V/5V/ Adjustable Output, Step-Up DC-DC Converters
MAX777MJA	MAXIM	获取价格	Voltage-Mode SMPS Controller
MAX77801	ADI	获取价格	5.5V输入，2A 高效率升/降压稳压器
MAX77812	ADI	获取价格	20A、用户可配置、四相、Buck转换器

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