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| 型号： | DS2731E+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/20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： | 1 |
| 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： | 管件 |
| 产品目录页面： | 1436 (CN2011-ZH PDF) |
Cache-Memory Battery-Backup Management IC
Buck-Regulator Operation
Overview
VREG is the feedback pin for the 2MHz PWM switching
regulator cache-memory supply. The switching node
uses this voltage reference feedback to regulate the
output voltage to the value specified by DIV. The
switching power-supply high-side and low-side FETs
drive LX. The output inductor is connected to this node.
During normal operation, the switching frequency
observed on the LX pin is approximately 2MHz. The
exact switching frequency and duty factor varies based
on load and inductor selection. The SGND pin con-
nects to the source of the internal low-side switch. This
pin should be routed from the DS2731 to the negative
terminal of the output capacitor. There are fast transient
currents in this connection caused by the commutation
of the body-drain diode of the low-side switch when the
high-side switch turns on. Considerations should be
taken during layout to minimize EMI. The buck regulator
is equipped with an internal temperature-shutdown cir-
cuit that turns off the regulator if the circuit temperature
reaches 165°C. Regulation resumes once the tempera-
ture has cooled 15°C below 165°C.
MEMORY BUCK EFFICIENCY
92.0
91.5
91.0
90.5
90.0
89.5
89.0
88.5
88.0
87.5
87.0
86.5
10
30
50
70
90
110
130
150
170
190
210
230
250
LOAD (mA)
NOTE: THE INDUCTOR USED FOR EFFICIENCY MEASUREMENT WAS 2.2 μ H ± 20%. CURRENT RATING: 250mA for 30% INDUCTANCE DROOP AND 260mA FOR WIRE
CSA LIMIT OF 300 CIRCULAR MILS PER AMP.
Figure 7a. Memory Buck Regulator Efficiency with 2.2μH Inductor
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2731E+ | 功能描述:电池管理 Cache-Memory Battery-Backup 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 |
| DS2731E+T&R | 制造商:Maxim Integrated Products 功能描述:CACHEMEM BAT BCKUP MGMT TSSOP28 T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MANAGEMENT BACKUP 28-TSSOP |
| DS2731E+T&R | 功能描述:电池管理 Cache-Memory Battery-Backup 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 |
| DS2731E+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Cache-Memory Battery-Backup Management IC |
| DS2731EVKIT+ | 制造商:Maxim Integrated Products 功能描述:12V A DC/DC CONVERTER - Boxed Product (Development Kits) |
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