MAX8653ETI+T [MAXIM]
Switching Regulator/Controller;
| 型号： | MAX8653ETI+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Switching Regulator/Controller 调节器 开关 |
| 文件： | 总1页 (文件大小：110K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
XX-XXXX; Rev 0; 7/07
Dual, 5A, 1.5MHz Step-Down
Regulator with Integrated High-Side Switches
General Description
Features
, High-Side MOSFETs
The MAX8653 dual-output, synchronous, step-down reg-
♦ Integrated 80mΩ R
DS(ON)
ulator contains low R
integrated high-side
DS(ON)
♦ Adjustable Hiccup-Mode Short-Circuit Current-
Limit Protection
♦ ±±1 Output Accuracꢀ oꢁer Load, Line, and
Temperature
♦ 9V to ±4V Input Supplꢀ Range
♦ Adjustable Output Down to 0.6V
♦ Digital Soft-Start Reduces Inrush Supplꢀ Current
♦ 300kHz to ±.5MHz Adjustable Switching
Frequencꢀ
♦ External Frequencꢀ Sꢀnchronization
♦ Compatible with Ceramic, Polꢀmer, and
Electrolꢀtic Capacitors
MOSFET switches for ease of layout and achieving small
footprints. Each output delivers up to 5A. The output
voltage is adjustable down to 0.6V and operates from a
9V to 14V input voltage. The MAX8653 uses a proprietary
high-bandwidth, constant-frequency, peak-voltage-mode
control architecture and operates at an adjustable switch-
ing frequency between 300kHz to 1.5MHz. The architec-
ture is suitable for use with a wide range of output
capacitor technologies such as aluminum electrolytic,
POSCAPs, and ceramic capacitors for flexible design.
The simple compensation scheme achieves fast
response under both line and load transients.
The switching frequency is adjustable using a single
external resistor. The output channels operate 180° out-
of-phase to reduce the input ripple current, thus reduc-
ing the required input capacitance. The high operating
frequency minimizes the size of external components.
The external reference input (REFIN) enables imple-
mentation of tracking applications such as DDR power
supplies. The MAX8653 utilizes internal digital soft-start
and features a lossless (cycle-by-cycle) current sens-
ing. It includes adjustable, hiccup-mode current-limit
and short-circuit protection for minimum power dissipa-
tion under fault conditions. Each output contains an
enable (EN_) input along with a power-good (POK_)
signal for easy sequencing. The MAX8653 is available
in a 28-pin, 5mm x 5mm Thin QFN package.
♦ ±80° Out-of-Phase Operation
♦ Enable and POK for Each Output
♦ REFIN Feature for Tracking Applications
♦ 28-Lead 5mm x 5mm Thin QFN Package
Ordering Information
TEMP
RANGE*
PKG
CODE
PART
PIN-PACKAGE
28 Thin QFN-EP**
(5mm x 5mm)
MAX8653ETI+ -40°C to +85°C
T2855-5
+Denotes lead-free package.
Applications
*The MAX8653 is specified in the extended temperature range.
**EP = Exposed pad.
Telecom
Network Equipment
Storage
DDR Memories
DSL
Pin Configuration appears at end of data sheet.
Set-Top Box
Cable Modem
Servers
Typical Operating Circuit
V+
IN1
INPUT
IN2
9V TO 14V
POK1
BST1
POK2
BST2
LX1
DL1
LX2
DL2
OUTPUT2
3.3V, 2A
OUTPUT
1.5V, 5A
MAX8653
FB1
FB2
ILIM1
ILIM2
________________________________________________________________ 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.
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