参数资料
| 型号： | MAX769EEI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC PAGER SYSTEM 28-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 手持/移动设备 |
| 电流 - 电源： | 4µA |
| 电源电压： | 1.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-QSOP |
| 供应商设备封装： | 28-QSOP |
| 包装： | 管件 |
2 or 3-Cell, Step-Up/Down,
Two-Way Pager System IC
Table 5. V OUT Output Voltage
All DC-DC converter and charging circuitry is disabled
when the backup regulator is turned on, but all other
SERIAL-DATA BIT
V OUT
(V)
functions remain active. Activate BACKUP manually or by
serial command, or set it to trigger automatically via LBO.
OV4
OV3
OV2
OV1
OV0
Automatic Backup
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
Setting the LBO_Sets_BACKUP serial bit (Table 1) pro-
grams the IC so that when LBO goes low, the backup
regulator automatically turns on without instructions from
the microprocessor (μP). When the LBO_Sets_BACKUP
bit is 0, the backup regulator is turned on only by setting
the BACKUP bit. The BACKUP bit also overrides the
LBO_Sets_BACKUP bit. Figure 3 shows the logic for this
function.
If the main battery is depleted and the NiCd battery is
drained during backup, RSO goes low while the back-
up regulator is supplying OUT (if RSI is used to monitor
OUT or REG1). When RSO falls, the serial registers
reset to their POR states (with the DC-DC converter on
in Coast Mode and the backup regulator off, see
Tables 1, 2, and 3). This prevents the IC from getting
hung up with the DC-DC converter off when a new main
battery is inserted. This sequence is required because
if the MAX769 did not default to “DC-DC converter on”
when coming out of reset, the μP (still reset by RSO)
would not be able to provide the device with serial
instructions to turn on.
Serial Interface
The MAX769 has an SPI-compatible serial interface.
The serial-interface lines are Chip Select ( CS ), Serial
Clock (SCL), Serial Data In (SDI), and Serial Data Out
(SDO). Serial input data is arranged in 8-bit bytes. Most
bytes contain a 3-bit address pointer (R2, R1, R0)
along with 5 bits of input data (D4–D0). For common
operations such as selecting Run or Coast Mode, acti-
vating REG2 or REG3, or turning on DR1 or DR2, only
the 000 (R2, R1, R0) address register needs to be writ-
ten. The serial input data format for all MAX769 opera-
tions is outlined in Tables 1, 2, and 3.
15mA_CHG
TO
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
1
0
1
0
1
4.6
4.7
4.8
4.9
1mA_CHG
LBO
CHARGER
CONTROL
TO
BACKUP
LBO_SETS_BACKUP
BACKUP
REGULATOR
Figure 3. Logic for Charger Control and BACKUP and for
LBO_Sets_BACKUP Serial Input Bits
______________________________________________________________________________________
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX769EEI+ | 功能描述:PMIC 解决方案 2-3 Cell Step-Up/Dwn 2-Way Pgr System IC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX769EEI+T | 功能描述:PMIC 解决方案 2-3 Cell Step-Up/Dwn 2-Way Pgr System IC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX769EEI-T | 功能描述:PMIC 解决方案 2-3 Cell Step-Up/Dwn 2-Way Pgr System IC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX769EVKIT | 功能描述:电源管理IC开发工具 Evaluation Kit for the MAX769 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 |
| MAX7705CPA | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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