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参数资料
| 型号： | MAX1635EAI |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | Multi-Output, Low-Noise Power-Supply Controllers for Notebook Computers |
| 中文描述： | SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封装： | 5.30 MM, 0.65 MM PITCH, SSOP-28 |
| 文件页数： | 1/28页 |
| 文件大小： | 237K |
| 代理商： | MAX1635EAI |
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
________________General Desc ription
The MAX1630–MAX1635 are buck-topology, step-down,
switch-mode, power-supply controllers that generate
logic-supply voltages in battery-powered systems. These
high-performance, dual/triple-output devices include on-
board power-up sequencing, power-good signaling with
delay, digital soft-start, secondary winding control, low-
dropout circuitry, internal frequency-compensation net-
works, and automatic bootstrapping.
Up to 96% efficiency is achieved through synchronous
rectification and Maxim’s proprietary Idle Mode control
scheme. Efficiency is greater than 80% over a 1000:1
load-current range, which extends battery life in system-
suspend or standby mode. Excellent dynamic response
corrects output load transients caused by the latest
dynamic-clock CPUs within five 300kHz clock cycles.
Strong 1A on-board gate drivers ensure fast external
N-channel MOSFET switching.
These devices feature a logic-controlled and synchroniz-
able, fixed-frequency, pulse-width-modulation (PWM)
operating mode. This reduces noise and RF interference
in sensitive mobile communications and pen-entry appli-
cations. Asserting the
SKIP
pin enables fixed-frequency
mode, for lowest noise under all load conditions.
The MAX1630–MAX1635 include two PWM regulators,
adjustable from 2.5V to 5.5V with fixed 5.0V and 3.3V
modes. All these devices include secondary feedback
regulation, and the MAX1630/MAX1632/MAX1633/
MAX1635 each contain 12V/120mA linear regulators. The
MAX1631/MAX1634 include a secondary feedback input
(SECFB), plus a control pin (STEER) that selects which
PWM (3.3V or 5V) receives the secondary feedback sig-
nal. SECFB provides a method for adjusting the sec-
ondary winding voltage regulation point with an external
resistor divider, and is intended to aid in creating auxiliary
voltages other than fixed 12V.
The MAX1630/MAX1631/MAX1632 contain internal out-
put overvoltage and undervoltage protection features.
________________________Applic ations
Notebook and Subnotebook Computers
PDAs and Mobile Communicators
Desktop CPU Local DC-DC Converters
____________________________Features
o
96% Efficiency
o
+4.2V to +30V Input Range
o
2.5V to 5.5V Dual Adjustable Outputs
o
Selectable 3.3V and 5V Fixed or Adjustable
Outputs (Dual Mode)
o
12V Linear Regulator
o
Adjustable Secondary Feedback
(MAX1631/MAX1634)
o
5V/50mA Linear Regulator Output
o
Precision 2.5V Reference Output
o
Programmable Power-Up Sequencing
o
Power-Good (RESET) Output
o
Output Overvoltage Protection
(MAX1630/MAX1631/MAX1632)
o
Output Undervoltage Shutdown
(MAX1630/MAX1631/MAX1632)
o
200kHz/300kHz Low-Noise, Fixed-Frequency
Operation
o
Low-Dropout, 99% Duty-Factor Operation
o
2.5mW Typical Quiescent Power (+12V input, both
SMPSs on)
o
4μA Typical Shutdown Current
o
28-Pin SSOP Package
M
Multi-Output, Low-Noise Power-S upply
Controllers for Notebook Computers
________________________________________________________________ Maxim Integrated Products
1
5V
LINEAR
12V
LINEAR
POWER-UP
SEQUENCE
POWER-
GOOD
3.3V
SMPS
5V
SMPS
RESET
ON/OFF
+5V (RTC)
+3.3V
INPUT
+5V
+12V
________________Func tional Diagram
19-0480; Rev 3; 4/97
EVALUATION KIT
AVAILABLE
PART
MAX1630
CAI
MAX1630EAI
Ordering Information continued on last page.
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
28 SSOP
28 SSOP
_______________Ordering Information
Pin Configurations and Selector Guide appear at end of data
sheet.
Idle Mode and Dual Mode are trademarks of Maxim Integrated
Products.
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| MAX1639ESE | High-Speed Step-Down Controller with Synchronous Rectification for CPU Power |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1635EAI+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1635EAI-T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1636CPUEVKIT | 制造商:Maxim Integrated Products 功能描述:LOW VOLTAGE, PRECISION STEP DOWN CONTROLLER F - Bulk |
| MAX1636EAP | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1636EAP+ | 功能描述:DC/DC 开关控制器 Precision Step-Down for Portable CPU Pwr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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