- 您现在的位置：买卖IC网 > PDF目录13533 > MAX1742EEE+T (Maxim Integrated Products)IC REG BUCK SYNC 1A 16QSOP PDF资料下载
参数资料
| 型号： | MAX1742EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1A 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 1.5V，1.8V，2.5V，可调 |
| 输入电压： | 3 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QSOP |
ATION
ILABLE
19-1760; Rev 2; 9/05
KIT
EVALU
AVA
1A/2.7A, 1MHz, Step-Down Regulators with
Synchronous Rectification and Internal Switches
General Description
The MAX1742/MAX1842 constant-off-time, pulse-width-
modulated (PWM) step-down DC-DC converters are ideal
for use in 5V and 3.3V to low-voltage conversion neces-
sary in notebook and subnotebook computers. These
devices feature internal synchronous rectification for high
efficiency and reduced component count. They require
no external Schottky diode. The internal 90m Ω PMOS
power switch and 70m Ω NMOS synchronous-rectifier
switch easily deliver continuous load currents up to 1A.
The MAX1742/MAX1842 produce a preset 2.5V, 1.8V, or
1.5V output voltage or an adjustable output from 1.1V to
V IN . They achieve efficiencies as high as 95%.
The MAX1742/MAX1842 use a unique current-mode,
constant-off-time, PWM control scheme, which includes
Idle Mode? to maintain high efficiency during light-load
operation. The programmable constant-off-time architec-
ture sets switching frequencies up to 1MHz, allowing the
user to optimize performance trade-offs between effi-
ciency, output switching noise, component size, and
cost. Both devices are designed for continuous output
currents up to 1A. The MAX1742 uses a peak current
limit of 1.3A (min) and is suitable for applications requir-
ing small external component size and high efficiency.
The MAX1842 has a higher current limit of 3.1A (min)
and is intended for applications requiring an occasional
burst of output current up to 2.7A. Both devices also fea-
ture an adjustable soft-start to limit surge currents during
Features
? ±1% Output Accuracy
? 95% Efficiency
? Internal PMOS and NMOS Switches
90mΩ On-Resistance at V IN = 4.5V
110mΩ On-Resistance at V IN = 3V
? Output Voltage
2.5V, 1.8V, or 1.5V Pin Selectable
1.1V to V IN Adjustable
? 3V to 5.5V Input Voltage Range
? 600μA (max) Operating Supply Current
? <1μA Shutdown Supply Current
? Programmable Constant-Off-Time Operation
? 1MHz (max) Switching Frequency
? Idle-Mode Operation at Light Loads
? Thermal Shutdown
? Adjustable Soft-Start Inrush Current Limiting
? 100% Duty Cycle During Low-Dropout Operation
? Output Short-Circuit Protection
? 16-Pin QSOP Package
Ordering Information
startup, a 100% duty cycle mode for low-dropout opera-
tion, and a low-power shutdown mode that disconnects
the input from the output and reduces supply current
below 1μA. The MAX1742/MAX1842 are available in 16-
pin QSOP packages.
For similar devices that provide continuous output cur-
PART
MAX1742 EEE
MAX1742EEE+
MAX1842 EEE
MAX1842EEE+
TEMP RANGE
-40 ° C to +85 ° C
-40 ° C to +85 ° C
-40 ° C to +85 ° C
-40 ° C to +85 ° C
PIN-PACKAGE
16 QSOP
16 QSOP
16 QSOP
16 QSOP
rents up to 2A and 3A, refer to the MAX1644 and
MAX1623 data sheets.
Applications
5V or 3.3V to Low-Voltage Conversion
+ Denotes lead-free package.
Typical Configuration
CPU I/O Ring
Chipset Supplies
Notebook and Subnotebook Computers
INPUT
3V TO
5.5V
10 Ω
IN
LX
MAX1742 FB
MAX1842
OUTPUT
1.1V TO
V IN
V CC
PGND
Pin Configuration appears at end of data sheet.
2.2 μ F
470pF
SHDN
COMP
TOFF
GND
FBSEL
REF
Idle Mode is a trademark of Maxim Integrated Products.
SS
0.01 μ F
1 μ F
________________________________________________________________ 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
相关PDF资料 |
PDF描述 |
|---|---|
| MAX860ISA+ | IC REG SWITCHD CAP DBL INV 8SOIC |
| MAX4391CPA+ | IC REG INV ADJ 0.15A 8DIP |
| UPJ1E101MED | CAP ALUM 100UF 25V 20% RADIAL |
| VI-24Y-EV-F4 | CONVERTER MOD DC/DC 3.3V 99W |
| SC73B-270 | INDUCTOR SMD 27UH 0.94A 2.52MHZ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1742EVKIT | 功能描述:直流/直流开关调节器 Evaluation Kit for the MAX1742 MAX1842 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 |
| MAX17434GTL+ | 制造商:Maxim from Components Direct 功能描述:THE MAXIM MAX17434GTL+ IS A PWM REGULATOR. - Rail/Tube 制造商:Maxim 功能描述:The Maxim MAX17434GTL+ is a PWM Regulator. |
| MAX17435ETG+ | 功能描述:电池管理 High f SMBus Battery Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX17435ETG+T | 功能描述:电池管理 High f SMBus Battery Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX17435EVKIT+ | 功能描述:电池管理 High Frequency SMBus Battery Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。