Datasheet > MAX1820EUB

MAX1820EUB

更新时间： 2024-10-04 03:58:31

品牌	Logo	应用领域
美信 - MAXIM		光电二极管
页数	文件大小	规格书
21页	700K
描述
Switching Regulator, Current-mode, 1.55A, 1200kHz Switching Freq-Max, PDSO10, MO-187C-BA, MSOP-10

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MAX1820EUB 数据手册

19-2011; Rev 3; 4/05

WCDMA Cellular Phone 600mA

Buck Regulators

General Description

Features

The MAX1820/MAX1821 low-dropout, pulse-width-mod-

ulated (PWM) DC-DC buck regulators are optimized to

provide power to the power amplifier (PA) in WCDMA

cell phones; however, they may be applied in many

other applications where high efficiency is a priority. The

supply voltage range is from 2.6V to 5.5V, and the guar-

anteed output current is 600mA; 1MHz PWM switching

allows for small external components, while skip mode

reduces quiescent current to 180µA with light loads.

♦ Dynamically Adjustable Output from 0.4V to 3.4V

(MAX1820)

♦ Programmable Output from 1.25V to 5.5V

(MAX1821)

♦ SYNC to 13MHz External Clock (MAX1820X)

♦ SYNC to 19.8MHz External Clock (MAX1820Y)

♦ NO SYNC, Internal 1MHz Oscillator (MAX1820Z)

The MAX1820 is dynamically controlled to provide vary-

ing output voltages from 0.4V to 3.4V. The circuit is

designed such that the output voltage settles in <30µs

for a full-scale change in voltage and current. The

MAX1821 is set with external resistors to provide any

fixed output voltage in the 1.25V to 5.5V range.

♦ Low Quiescent Current

180µA (typ) in Skip Mode

0.1µA (typ) in Shutdown Mode

♦ No External Schottky Diode Required

♦ 600mA Guaranteed Output Current

♦ 0% to 100% Duty-Cycle Operation

The MAX1820/MAX1821 include a low on-resistance

internal MOSFET switch and synchronous rectifier to

maximize efficiency and minimize external component

count; 100% duty-cycle operation allows for low dropout

of only 150mV at 600mA load, including the external

inductor resistance. The devices are offered in 10-pin

♦ 150mV Dropout at 600mA Load (Including R

of External Inductor)

♦ µMAX or UCSP Packaging

µMAX and tiny 3 4 chip-scale (UCSP™) packages.

Typical Operating Circuits

________________________Applications

4.7µH

INPUT

2.6V TO

5.5V

DYNAMIC

OUTPUT

WCDMA Cell Phone Power Amplifiers

PDA, Palmtop, and Notebook Computers

Microprocessor Core Supplies

Digital Cameras

BATT

0.4V TO 3.4V

OUT

SHDN

4.7µF

PGND

MAX1820

13MHz

19.8MHz

PCMCIA and Network Cards

Hand-Held Instruments

COMP

GND

SYNC

OUT

CONTROL

DAC

REF

Typical Operating Circuits continued at end of data sheet.

Ordering Information continued at end of data sheet.

Pin Configurations appear at end of data sheet.

SKIP

UCSP is a trademark of Maxim Integrated Products, Inc.

µMAX is a registered trademark of Maxim Integrated Products, Inc.

Ordering Information

SYNC

PART

OUTPUT VOLTAGE

TEMP RANGE

PIN-PACKAGE

UCSP MARK

FREQ (MHz)

No Sync

19.8

MAX1820ZEBC*

MAX1820YEBC*

MAX1820XEBC*

MAX1820ZEUB

MAX1820YEUB

MAX1820XEUB

Dynamic

-40°C to +85°C

4 UCSP

AAB

AAL

AAM

—

No Sync

19.8

10 µMAX

—

*UCSP reliability is integrally linked to the user’s assembly methods, circuit board material, and environment. See the UCSP Reliability

Notice in the UCSP Reliability section of this data sheet for more information.

________________________________________________________________ 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...21

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与MAX1820EUB相关器件

型号	品牌	获取价格	描述	数据表
MAX1820EUB-T	MAXIM	获取价格	Switching Regulator, Current-mode, 1.55A, 1200kHz Switching Freq-Max, PDSO10, MO-187C-BA,
MAX1820EVKIT	MAXIM	获取价格	MAX1820 Evaluation Kit
MAX1820XEBC	MAXIM	获取价格	Analog IC
MAX1820XEBC+	MAXIM	获取价格	Switching Regulator, Current-mode, 1.55A, 1200kHz Switching Freq-Max, PBGA10, MICRO, CSP-1
MAX1820XEBC+T	MAXIM	获取价格	Switching Regulator, Current-mode, 1.55A, 1200kHz Switching Freq-Max, MICRO, CSP-12/10
MAX1820XEBC-T	MAXIM	获取价格	Switching Regulator, Current-mode, 1.55A, 1200kHz Switching Freq-Max, PBGA10, MICRO, CSP-1
MAX1820XEUB	MAXIM	获取价格	SMPS Controller
MAX1820XEUB+	ROCHESTER	获取价格	1.55A SWITCHING REGULATOR, 1200kHz SWITCHING FREQ-MAX, PDSO10, MICRO, SOP-10
MAX1820XEUB+T	ROCHESTER	获取价格	1.55A SWITCHING REGULATOR, 1200kHz SWITCHING FREQ-MAX, PDSO10, MO-187C-BA, MSOP-10
MAX1820XEUB-T	MAXIM	获取价格	Switching Regulator, Current-mode, 1.55A, 1200kHz Switching Freq-Max, PDSO10, MO-187C-BA,

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