參數(shù)資料
型號(hào)： DS21Q48
廠商： DALLAS SEMICONDUCTOR
元件分類(lèi)： Digital Transmission Interface
英文描述： DATACOM, PCM TRANSCEIVER, PBGA144
封裝： BGA-144
文件頁(yè)數(shù)： 1/14頁(yè)
文件大?。?/td> 318K
代理商： DS21Q48
19-3995; Rev 0; 3/06
MAX8627
Low VBATT, 20A IQ, 1MHz Synchronous
Boost Converter with True Shutdown
EVALUATION KIT AVAILABLE
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
General Description
The MAX8627 step-up converter is a high-efficiency,
low-quiescent current, synchronous boost converter
with True Shutdown and inrush current limiting. The
MAX8627 generates any boosted output voltage from
3V to 5V from either a 2-cell NiMH/NiCd or a single-cell
Li+/Li polymer battery.
Quiescent current is only 20A (typ), and at light loads
the converter pulses only as needed for best efficiency.
At higher loads, PWM mode maintains fixed 1MHz
operation for lowest noise and ripple.
The MAX8627 includes an internal soft-start to limit
inrush current to a maximum of 500mA. Additional fea-
tures include True Shutdown, internal compensation,
and adjustable current limit. The MAX8627 is available
in a tiny 3mm x 3mm TDFN package and is ideal for
use in handheld devices such as DSCs, PDAs, and
smartphones.
Applications
DSC Motors and Backup Power
Microprocessor/DSP Core Power
Cellphones, PDAs, MP3 Players
Portable Handheld Devices
Features
o 1MHz PWM Switching Frequency
o True Shutdown Output
o Up to 95% Efficiency
o 1.0A Guaranteed Output Current
o Soft-Start Eliminates Inrush Current
o 20A (typ) Quiescent Current
o 0.1A Logic-Controlled Shutdown
o Internal Synchronous Rectifier
o Internal Compensation
o Adjustable Current Limit
o Low-Noise Antiringing Feature
o Tiny 14-Pin, 3mm x 3mm, TDFN Package
MAX8627ETD+
TDFN 3mm x 3mm
+
TOP VIEW
24
5
13
11
10
ILIM
PG
FB
BATT
1
14
OUTS
GND
3
12
AGND
ON
6
9
LX
POUT
7
8
LX
POUT
Pin Configuration
Ordering Information
Note: The device operates in the -40
°C to +85°C extended oper-
ating temperature range.
*
EP = Exposed pad.
+
Denotes lead-free package.
PART
PIN-
PACKAGE
PKG
CODE
TOP
MARK
MAX8627ETD+
14 TDFN-EP*
3mm x 3mm
T1433-2
AAQ
True Shutdown is a trademark of Maxim Integrated Products, Inc.
MAX8627
BATT
ON
ILIM
GND
LX
POUT
OUTS
FB
INPUT BATTERY
2.5V TO 4.2V
OUTPUT
3V TO 5V
UP TO 1A
ON
C2
C3
R1
R2
R3
R4
C4
L1
OFF
4, 5
3
AGND
12
1
13
2
PGND
10, 11
14
6,7
8, 9
C1
Typical Operating Circuit
product patent marking information.
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DS21Q48NB 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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