參數(shù)資料
型號： MAX1830-MAX1831
廠商： Maxim Integrated Products, Inc.
英文描述： 3A, 1MHz, Low-Voltage, Step-Down Regulators with Synchronous Rectification and Internal Switches
中文描述： 第3A，1MHz的，低電壓，降壓型穩(wěn)壓器與同步整流和內部開關
文件頁數(shù)： 1/13頁
文件大小： 278K
代理商： MAX1830-MAX1831
M
3A, 1MHz, Low-Voltage, Step-Down Regulators with
Synchronous Rectification and Internal Switches
________________________________________________________________
Maxim Integrated Products
1
19-2198; Rev 0; 10/01
General Description
The MAX1830/MAX1831 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
necessary 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 45m
PMOS power switch and 55m
NMOS synchronous-rec-
tifier switch easily deliver continuous load currents up to
3A. The MAX1830 produces preset +2.5V, +1.8V, or
+1.5V output voltage or an adjustable output from +1.1V
to V
IN
. The MAX1831 produces preset +3.3V, +2.5V, and
+1.5V output voltages and an adjustable output from
+1.1V to V
IN.
They achieve efficiencies as high as 94%.
The MAX1830/MAX1831 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
architecture sets switching frequencies up to 1MHz,
allowing the user to optimize performance trade-
offs between efficiency, output switching noise, compo-
nent size, and cost. Both devices are designed for con-
tinuous output currents up to 3A, an internal digital
soft-start to limit surge currents during startup, a 100%
duty cycle mode for low-dropout operation, and a
low-power shutdown mode that disconnects the input
from the output and reduces supply current below
1μA.The MAX1830/MAX1831 are available in 16-pin
QSOP packages.
For similar devices that provide continuous output
currents of 1A to 3A, refer to the MAX1644, MAX1623,
and MAX1742/MAX1842/MAX1843 data sheets.
Applications
5V or 3.3V to Low-Voltage Conversion
CPU I/O Supplies
Chipset Supplies
Notebook and Subnotebook Computers
Features
o
±1.5% Output Accuracy
o
94% Efficiency
o
Internal PMOS/NMOS Switches
45m
/55m
On-Resistance at V
IN
= +4.5V
50m
/55m
On-Resistance at V
IN
= +3V
o
Output Voltages
+3.3V, +2.5V, or +1.5V Pin Selectable (MAX1831)
+2.5V, +1.8V, or +1.5V Pin Selectable (MAX1830)
+1.1V to V
IN
Adjustable (Both Devices)
o
+3V to +5.5V Input Voltage Range
o
750μA (max) Operating Supply Current
o
<1μA Shutdown Supply Current
o
Programmable Constant-Off-Time Operation
o
Up to 1MHz Switching Frequency
o
Idle Mode Operation at Light Loads
o
Thermal Shutdown
o
Internal Digital Soft-Start Inrush Current Limiting
o
100% Duty Cycle During Low-Dropout Operation
o
Output Short-Circuit Protection
o
16-Pin QSOP Package
Idle Mode is a trademark of Maxim Integrated Products, Inc.
Typical Configuration
TOFF
COMP
V
CC
FBSEL
SHDN
IN
PGND
GND
REF
LX
FB
MAX1830
MAX1831
OUTPUT
+1.1V TO
V
IN
INPUT
+3V TO
+5.5V
EVALUATION KIT
AVAILABLE
Pin Configuration appears at end of data sheet.
PART
MAX1830
EEE
MAX1831
EEE
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
16 QSOP
16 QSOP
Ordering Information
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.
相關PDF資料
PDF描述
MAX1830 Replaced by TMS320BC52 :
MAX1831EEE 3A, 1MHz, Low-Voltage, Step-Down Regulators with Synchronous Rectification and Internal Switches
MAX1833ETT30-T High-Efficiency Step-Up Converters with Reverse Battery Protection
MAX1834 High-Efficiency Step-Up Converters with Reverse Battery Protection
MAX1832EUT-T High-Efficiency Step-Up Converters with Reverse Battery Protection
相關代理商/技術參數(shù)
參數(shù)描述
MAX1831EEE 功能描述:直流/直流開關調節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
MAX1831EEE+ 功能描述:直流/直流開關調節(jié)器 3A 1MHz Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
MAX1831EEE+T 功能描述:直流/直流開關調節(jié)器 3A 1MHz Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
MAX1831EEE-T 功能描述:直流/直流開關調節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
MAX1832EUT 制造商:Maxim Integrated Products 功能描述:HIGH-EFFICIENCY STEP-UP CONVERTER - Rail/Tube
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