參數(shù)資料
型號(hào)： MAX1557ETB
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： 16レA IQ, 1.2A PWM Step-Down DC-DC Converters
中文描述： 2.25 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, DSO10
封裝： 3 X 3 MM, 0.80 MM HEIGHT, MO-229WEED-3, TDFN-10
文件頁(yè)數(shù)： 1/12頁(yè)
文件大?。?/td> 732K
代理商： MAX1557ETB
General Description
The MAX1556/MAX1557 are low-operating-current
(16μA), fixed-frequency step-down regulators. High effi-
ciency, low-quiescent operating current, low dropout,
and minimal (27μA) quiescent current in dropout make
these converters ideal for powering portable devices
from 1-cell Li-ion or 3-cell alkaline/NiMH batteries. The
MAX1556 delivers up to 1.2A; has pin-selectable 1.8V,
2.5V, and 3.3V outputs; and is also adjustable. The
MAX1557 delivers up to 600mA; has pin-selectable 1V,
1.3V, and 1.5V outputs; and is also adjustable.
The MAX1556/MAX1557 contain a low-on-resistance
internal MOSFET switch and synchronous rectifier to
maximize efficiency and dropout performance while
minimizing external component count. A proprietary
topology offers the benefits of a high fixed-frequency
operation while still providing excellent efficiency at
both light and full loads. A 1MHz PWM switching fre-
quency keeps components small. Both devices also
feature an adjustable soft-start to minimize battery tran-
sient loading.
The MAX1556/MAX1557 are available in a tiny 10-pin
TDFN (3mm x 3mm) package.
Applications
PDAs and Palmtop Computers
Cell Phones and Smart Phones
Digital Cameras and Camcorders
Portable MP3 and DVD Players
Hand-Held Instruments
Features
Up to 97% Efficiency
95% Efficiency at 1mA Load Current
Low 16μA Quiescent Current
1MHz PWM Switching
Tiny 3.3μH Inductor
Selectable 3.3V, 2.5V, 1.8V, 1.5V, 1.3V, 1.0V, and
Adjustable Output
1.2A Guaranteed Output Current (MAX1556)
Voltage Positioning Optimizes Load-Transient
Response
Low 27μA Quiescent Current in Dropout
Low 0.1μA Shutdown Current
No External Schottky Diode Required
Analog Soft-Start with Zero Overshoot Current
Small, 10-Pin, 3mm x 3mm TDFN Package
M
16μA I
Q
, 1.2A PWM
Step-Down DC-DC Converters
________________________________________________________________
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
TOP VIEW
LX
OUT
SHDN
6
7
8
9
10
INP
D1
3
2
1
SS
GND
IN
5
PGND
D2
4
TDFN
MAX1556/
MAX1557
Pin Configuration
Ordering Information
LX
SS
ON
OFF
SHDN
GND
INPUT
2.6V TO 5.5V
VOLTAGE
SELECT
OUTPUT
0.75V TO V
IN
PGND
OUT
INP
IN
D1
D2
MAX1556/
MAX1557
Typical Operating Circuit
19-3336; Rev 0; 7/04
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
PIN-PACKAGE
TOP
MARK
MAX1556
ETB
-40
°
C to +85
°
C
10 TDFN-EP*
(T1033-1)
10 TDFN-EP*
(T1033-1)
ACQ
MAX1557
ETB
-40
°
C to +85
°
C
ACR
*
EP = Exposed paddle.
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1557ETB+ 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP DOWN 10TDFN EP - Rail/Tube
MAX1557ETB+T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 16uA IQ 1.2A PWM Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1557ETB-T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 16uA IQ 1.2A PWM Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX15588GTL+ 制造商:Maxim Integrated Products 功能描述:2-/1-PHASE+1 PHASE QUICKTUNE-PWM CONTROLLER WITH I2C INTERFA - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC PWM CTLR I2C INTERFACE QFN
MAX15588GTL+T 制造商:Maxim Integrated Products 功能描述:2-/1-PHASE+1 PHASE QUICKTUNE-PWM CONTROLLER WITH I2C INTERFA - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC PWM CTLR I2C INTERFACE QFN
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