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| 型号： | MAX1557ETB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.6A 10TDFN |
| 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： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.75 V ~ 5.5 V |
| 输入电压： | 2.6 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 600mA |
| 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： | 10-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
19-3336; Rev 3; 1/11
ATION
EVALU
AVAIL
KIT
ABLE
16μA I Q , 1.2A PWM
Step-Down DC-DC Converters
General Description
The MAX1556/MAX1556A/MAX1557 are low-operating-
current (16μA), fixed-frequency step-down regulators.
High efficiency, 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/MAX1556A/MAX1557 contain a low-on-
resistance internal MOSFET switch and synchronous
Features
o Up to 97% Efficiency
o 95% Efficiency at 1mA Load Current
o Low 16 μ A Quiescent Current
o 1MHz PWM Switching
o Tiny 3.3 μ H Inductor
o Selectable 3.3V, 2.5V, 1.8V, 1.5V, 1.3V, 1.2V, 1.0V,
and Adjustable Output
o 1.2A Guaranteed Output Current
(MAX1556/MAX1556A)
o Voltage Positioning Optimizes Load-Transient
Response
rectifier to maximize efficiency and dropout perfor-
mance while minimizing external component count. A
proprietary topology offers the benefits of a high fixed-
frequency operation while still providing excellent effi-
o
o
o
Low 27 μ A Quiescent Current in Dropout
Low 0.1 μ A Shutdown Current
No External Schottky Diode Required
ciency at both light and full loads. A 1MHz PWM
switching frequency keeps components small. Both
devices also feature an adjustable soft-start to minimize
battery transient loading.
The MAX1556/MAX1556A/MAX1557 are available in a
o Analog Soft-Start with Zero Overshoot Current
o Small, 10-Pin, 3mm x 3mm TDFN Package
Ordering Information
tiny 10-pin TDFN (3mm x 3mm) package.
Applications
PDAs and Palmtop Computers
Cell Phones and Smart Phones
PART
MAX1556 ETB+
MAX1556ETB/V+T
TEMP RANGE PIN-PACKAGE
-40 ° C to +85 ° C 10 TDFN-EP*
-40 ° C to +85 ° C 10 TDFN-EP*
TOP
MARK
ACQ
AWS
Digital Cameras and Camcorders
Portable MP3 and DVD Players
Hand-Held Instruments
MAX1556A ETB+ -40 ° C to +85 ° C 10 TDFN-EP*
MAX1557 ETB+ -40 ° C to +85 ° C 10 TDFN-EP*
*EP = Exposed paddle.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
T = Tape and reel.
AUJ
ACR
Typical Operating Circuit
Pin Configuration
INPUT
2.6V TO 5.5V
INP
LX
OUTPUT
0.75V TO V IN
TOP VIEW
MAX1556
IN
1
10
D1
IN
MAX1556A
MAX1557
PGND
GND
SS
2
3
MAX1556
9
8
INP
LX
VOLTAGE
SELECT
ON
D1
D2
OUT
SS
OUT
SHDN
4
5
MAX1556A
MAX1557
7
6
PGND
D2
OFF
SHDN
GND
TDFN
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
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| 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 |
| MAX1558ETB | 制造商:Maxim Integrated Products 功能描述:DUAL 3MM X 3MM 1.2A/PROGRAMMABLE-C - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX1558ETB+ | 制造商:Maxim Integrated Products 功能描述:USB PWR SW DUAL 2.75V TO 5.5V 2A 10TDFN EP - Bulk |
| MAX1558ETB+T | 功能描述:电源开关 IC - USB Dual 1.2A/Prog-Crnt USB Switch w/Autorst RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
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