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参数资料
| 型号： | MAX16023LTAM12+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/17页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY BACKUP 1.2V 8TDFN-EP |
| 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： | 所有电池类型 |
| 电源电压： | 1.53 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
Battery-Backup Circuits with
Regulated Output Voltage
Detailed Description
The Typical Applications Circuit shows a typical con-
nection using the MAX16024. OUT powers the SRAM. If
V CC is higher than the reset threshold (V TH ), or if V CC is
lower than V TH but higher than V BATT , the regulator is
powered from V CC . If V CC < V TH , V CC < V BATT , and the
regulator is in dropout, the regulator is powered from
BATT (see the Functional Diagrams). OUT supplies up
to 100mA from V CC .
Backup-Battery Switchover
In a brownout or power failure, it may be necessary to
preserve the contents of the RAM. With a backup-bat-
tery installed at BATT, the MAX16023/MAX16024 auto-
matically switch the RAM to backup power when V CC
falls. The MAX16024 has a BATT ON output that goes
high when in battery-backup mode. Three conditions
must be met for these devices to switch to battery
backup mode:
1) V CC is lower than the reset threshold.
2) V CC is lower than V BATT .
3) The regulator is in dropout (except for the 1.2V out-
put version).
Chip-Enable Signal Gating (MAX16024)
The MAX16024 provides internal gating of CE signals to
prevent erroneous data from being written to CMOS
RAM in the event of a power failure or brownout. During
normal operation, the CE gate enables and passes all
CE transitions. When the reset output asserts, this path
becomes disabled, preventing erroneous data from cor-
rupting the CMOS RAM and CE OUT is pulled up to OUT
through an internal current source. The 1.5ns propaga-
tion delay from CE IN to CE OUT allows the devices to
be used with most μPs and high-speed DSPs.
During normal operation (reset not asserted), CE IN is
connected to CE OUT through a low on-resistance
transmission gate. If CE IN is high when a reset asserts,
CE OUT remains high regardless of any subsequent
transition on CE IN during the reset event.
If CE IN is low when reset asserts, CE OUT is held low for
12μs to allow completion of the read/write operation.
After the 12μs delay expires, CE OUT goes high and
stays high regardless of any subsequent transitions on
CE IN during the reset event. When CE OUT is discon-
nected from CE IN, CE OUT is actively pulled up to OUT.
The propagation delay through the chip-enable circuitry
depends on both the source impedance of the drive to
CE IN and the capacitive loading at CE OUT. Minimize
the capacitive load at CE OUT to minimize propagation
delay, and use a low-output-impedance driver.
V CC
RESET THRESHOLD V TH
CEIN
CEOUT
RESET-TO-CEOUT DELAY (12 μ s)
t RD
t RD
*
RESET
t RP
t RP
* IF CEIN GOES HIGH BEFORE RESET ASSERTS,
CEOUT GOES HIGH WITHOUT DELAY AS
CEIN GOES HIGH.
Figure 1. Reset and Chip-Enable Timing
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16023LTAM18+T | 功能描述:电池管理 Battery Backup 1.8V-Ep 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 |
| MAX16023LTAM25+T | 功能描述:电池管理 Battery Backup 3.3V-Ep 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 |
| MAX16023LTAM33+T | 功能描述:电池管理 Battery Backup 3.3V-Ep 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 |
| MAX16023LTAR12+T | 功能描述:电池管理 Battery Backup 1.2V-Ep 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 |
| MAX16023LTAR18+T | 功能描述:电池管理 Battery Backup 1.8V-Ep 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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