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參數資料
| 型號： | DS2148TN |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Digital Transmission Interface |
| 英文描述： | DATACOM, PCM TRANSCEIVER, PQFP44 |
| 封裝： | TQFP-44 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 603K |
| 代理商： | DS2148TN |
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.
General Description
The MAX8625A PWM step-up/down regulator is intend-
ed to power digital logic, hard disk drives, motors, and
other loads in portable, battery-powered devices such
as PDAs, cell phones, digital still cameras (DSCs), and
MP3 players. The MAX8625A provides either a fixed
3.3V or adjustable output voltage (1.25V to 4V) at up to
0.8A from a 2.5V to 5.5V input. The MAX8625A utilizes
a 2A peak current limit.
Maxim’s proprietary H-bridge topology provides a
seamless transition through all operating modes without
the glitches commonly seen with other devices. Four
internal MOSFETs (two switches and two synchronous
rectifiers) with internal compensation minimize external
components. A
SKIP input selects a low-noise, fixed-
frequency PWM mode, or a high-efficiency skip mode
where the converter automatically switches to PFM
mode under light loads for best light-load efficiency.
The internal oscillator operates at 1MHz to allow for a
small external inductor and capacitors.
The MAX8625A features current-limit circuitry that shuts
down the IC in the event of an output overload. In addi-
tion, soft-start circuitry reduces inrush current during
startup. The IC also features True Shutdown
TM, which
disconnects the output from the input when the IC is
disabled. The MAX8625A is available in a 3mm x 3mm,
14-pin TDFN package.
Applications
PDAs and Smartphones
DSCs and Camcorders
MP3 Players and Cellular Phones
Battery-Powered Hard Disk Drive (HDD)
Features
Four Internal MOSFET True H-Bridge Buck/Boost
Glitch-Free, Buck-Boost Transitions
Minimal Output Ripple Variation on Transitions
Up to 92% Efficiency
37A (typ) Quiescent Current in Skip Mode
2.5V to 5.5V Input Range
Fixed 3.3V or Adjustable Output
1A (max) Logic-Controlled Shutdown
True Shutdown
Output Overload Protection
Internal Compensation
Internal Soft-Start
1MHz Switching Frequency
Thermal-Overload Protection
Small 3mm x 3mm, 14-Pin TDFN Package
MAX8625A
High-Efficiency, Seamless Transition,
Step-Up/Down DC-DC Converter
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
MAX8625A
SKIP
IN
GND
FB
OUT
LX1
LX2
ON
INPUT
2.7V TO 5.5V
OUTPUT
3.3V
OFF
ON
PWM
SKIP
REF
Typical Operating Circuit
19-1006; Rev 4; 4/09
True Shutdown is a trademark of Maxim Integrated Products, Inc.
EVALUATION
KIT
AVAILABLE
Note: The device is specified over the -40°C to +85°C extended
temperature range.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
**
EP = Exposed pad.
PART
PIN-
PACKAGE
TOP MARK
MAX8625AETD+
14 TDFN-EP**
ABQ
MAX8625A
TDFN-EP
TOP VIEW
24
5
13
11
10
IN
GND
OUT
LX1
LX2
ON
1
+
14
IN
LX1
3
12
GND
LX2
6
9
OUT
SKIP
7
8
REF
FB
EP
EP = EXPOSED PAD.
Pin Configuration
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| DS2151QB | DATACOM, FRAMER, PQCC44 |
| DS2152LN | DATACOM, FRAMER, PQFP100 |
| DS2152L | DATACOM, FRAMER, PQFP100 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DS2148TN+ | 功能描述:網絡控制器與處理器 IC 5V E1/T1/J1 Line Interface RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS2148TNB | 功能描述:網絡控制器與處理器 IC RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS2148TNC | 功能描述:網絡控制器與處理器 IC RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS2148TN-W | 功能描述:網絡控制器與處理器 IC RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS2149 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:5V T1/J1 Line Interface Unit |
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