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参数资料
| 型号： | DS2731E+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC MANAGEMENT BACKUP 28-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 备份管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 10.8 V ~ 13.2 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
Rev 1; 1/09
Cache-Memory Battery-Backup Management IC
General Description
The DS2731 is a complete power-management solution
for modular backup applications. It is well-suited for 2.5V
and below memory bus voltages, with an input voltage of
12V. The DS2731 includes an internal MOSFET switching
power stage for charging a one-cell lithium chemistry bat-
tery. It has a fully integrated synchronous buck regulator
capable of supplying up to 450mA of cache backup sup-
ply current, and the necessary logic and power devices
for handling the switchover from system power to battery
power. The battery charging method of the DS2731 is
constant current/constant voltage (CCCV). Output voltage
can be margined from 3.8V to 4.6V using a resistor-
divider. Charge is terminated when the charging current
falls below 5% of full charge current. Switchover to battery
backup is initiated by an internal comparator and occurs
automatically when a sensed-input voltage drops below
2.93V. At light loads, the 2MHz internal synchronous buck
regulator operates in burst mode for maximum efficiency.
All nonessential functions of the DS2731 are disabled
Features
o Lithium Chemistry CCCV Charger
o Adjustable Regulated Charging Up to 1.5A DC
o Adjustable Charge Voltage from 3.8V to 4.6V
o External and Internal Thermal Protection
o Safety Timer Secondary Termination
o LED Indicator Outputs
o Detects Power Outage and Switches Between
Normal Power and Backup Battery
o Adjustable High-Efficiency Synchronous Buck
Regulator with Skip Mode at Light Loads
o Low-Power Consumption in Discharge Mode
Ordering Information
while supplying holdup current to the cache memory, and
the IC goes into very low-current dormant mode when the
battery voltage drops below a user-settable threshold.
The DS2731 keeps track of charge status and signals the
user through open-drain I/O pins that can be used to
PART
DS2731E+
TEMP RANGE
-20°C to +70°C
PIN-
PACKAGE
28 TSSOP-EP*
(173 mils)
TOP
MARK
DS2731
drive LEDs.
DS2731E+T&R -20°C to +70°C
28 TSSOP-EP*
(173 mils)
DS2731
Applications
RAID Controller Card
Typical Operating Circuit
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
*EP = Exposed pad.
Pin Configuration
TOP VIEW
MARGIN
STMR
1
2
28
27
THM
RSET
DS2731
CTG
3
26
BATT+
MAIN
POWER
AUXILIARY
POWER
SWITCH MODE
CHARGER
(CCCV)
POWER
MANAGEMENT
LITHIUM
BACKUP
CELL
AUX
CBIAS
VREG
CIN
LX
SGND
AGND
4
5
6
7
8
9
10
DS2731
25
24
23
22
21
20
19
SNS
CGATE
VIN
CHG1
CHG2
CGND1
CGND2
REF
LO_BATT
11
12
18
17
CHARGE
FAULT
SWITCHING
REGULATOR
CACHE
MEMORY
DIV
ENS
13
14
*EP
16
15
DONE
ENC
TSSOP
*EXPOSED PAD
________________________________________________________________ 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2731EVKIT+ | 制造商:Maxim Integrated Products 功能描述:12V A DC/DC CONVERTER - Boxed Product (Development Kits) |
| DS2731K | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| DS2733E+ | 功能描述:电池管理 BBU Power IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2733E+T&R | 制造商:Maxim Integrated Products 功能描述:BBU POWER IC 20-TSSOP T&R LF - Tape and Reel |
| DS2733E+T&R | 功能描述:电池管理 BBU Power IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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