参数资料
| 型号： | MAX1821EUB+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK WCDMA 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 转换器，WCDMA 功率放大器应用 |
| 输入电压： | 2.6 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 1.25 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 管件 |
19-2011; Rev 3; 4/05
ATION
ILABLE
EVALU
AVA
KIT
WCDMA Cellular Phone 600mA
Buck Regulators
General Description
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.
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.
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
μMAX ? and tiny 3 ? 4 chip-scale (UCSP?) packages.
________________________Applications
Features
? 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)
? 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
? 150mV Dropout at 600mA Load (Including R DC
of External Inductor)
? μMAX or UCSP Packaging
Typical Operating Circuits
WCDMA Cell Phone Power Amplifiers
PDA, Palmtop, and Notebook Computers
Microprocessor Core Supplies
INPUT
2.6V TO
5.5V
BATT
SHDN
LX
OUT
PGND
4.7 μ H
DYNAMIC
OUTPUT
0.4V TO 3.4V
4.7 μ F
Digital Cameras
PCMCIA and Network Cards
Hand-Held Instruments
13MHz
OR
19.8MHz
MAX1820
SYNC COMP
Typical Operating Circuits continued at end of data sheet.
V OUT CONTROL
DAC
REF
SKIP
GND
Ordering Information continued at end of data sheet.
Pin Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Ordering Information
PART
MAX1820 ZEBC*
MAX1820YEBC*
MAX1820XEBC*
MAX1820ZEUB
MAX1820YEUB
MAX1820XEUB
SYNC
FREQ (MHz)
No Sync
19.8
13
No Sync
19.8
13
OUTPUT VOLTAGE
Dynamic
Dynamic
Dynamic
Dynamic
Dynamic
Dynamic
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
3 ? 4 UCSP
3 ? 4 UCSP
3 ? 4 UCSP
10 μMAX
10 μMAX
10 μMAX
UCSP MARK
AAB
AAL
AAM
—
—
—
*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.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1821EUB+ | 功能描述:直流/直流开关调节器 WCDMA 600mA Buck Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1821EUB+T | 功能描述:直流/直流开关调节器 WCDMA 600mA Buck Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1821EUB-T | 功能描述:直流/直流开关调节器 WCDMA 600mA Buck Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1821EUB-TG069 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1821XEBC | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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