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参数资料
| 型号： | MAX6439UTPQRD3-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | Low-Power, Single-/Dual-Level Battery Monitors with Hysteresis and Integrated µP Reset |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封装： | SOT-23, 6 PIN |
| 文件页数： | 13/14页 |
| 文件大小： | 235K |
| 代理商： | MAX6439UTPQRD3-T |
MAX6439–MAX6442
has stabilized before power-converter or microproces-
sor activity is enabled.
These devices also have an independent P supervisor
that monitors VCC and provides an active-low reset out-
put. A manual reset function is available to allow the
user to reset the P with a push-button.
Low-Battery Output
The low-battery outputs are available in active-low
(LBO, LBOL, LBOH, LBOLH), open-drain configura-
tions. The low-battery outputs can be pulled to a volt-
age independent of VCC or VBATT, up to 5.5V. This
allows the device to monitor and operate from direct
battery voltage while interfacing to higher voltage
microprocessors.
The MAX6439/MAX6440 single-output voltage monitors
provide a single low-battery output, LBO. These fixed-
threshold devices assert LBO when VBATT drops below
VLTH and remain asserted for at least 150ms after
VBATT rises above VHTH (see Figure 2). The MAX6441/
MAX6442 triple-output voltage monitors provide three
low-battery outputs: LBOH, LBOL, and LBOLH. LBOH
asserts when VBATT drops below VHTH- and remains
asserted for at least 150ms after VBATT rises above
VHTH+. LBOL asserts when VBATT drops below VLTH-
and remains asserted for at least 150ms after VBATT
rises above VLTH+. LBOLH asserts when VBATT drops
below VLTH- and remains asserted for at least 150ms
after VBATT rises above VHTH+ (see Figure 3). For fast-
rising VBATT input, the LBOL timeout period must com-
plete before the LBOH/LBOLH timeout period begins.
Reset Output
The MAX6439–MAX6442 provide an active-low reset
output (RESET). RESET is asserted when the voltage at
VCC falls below the reset threshold level. Reset remains
asserted for the reset timeout period after VCC exceeds
the threshold. If VCC goes below the reset threshold
before the reset timeout period is completed, the inter-
nal timer restarts. The MAX6439/MAX6441 have open-
drain reset outputs, while the MAX6440/MAX6442 have
push-pull reset outputs (see Figure 4).
Low-Power, Single-/Dual-Level Battery Monitors
with Hysteresis and Integrated P Reset
8
_______________________________________________________________________________________
5%
HYST
LTH
DETECT
VTH
DETECT
5%
HYST
HTH
DETECT
VBATT
VCC
1.23V
LBO
TIMEOUT
PERIOD
RESET
TIMEOUT
PERIOD
VCC
LBOL
LBOH
LBOLH
RESET
MR
MAX6441
Figure 1b. Functional Diagram
MAX6440
LTH
DETECT
HTH
DETECT
R
S
Q
LBO TIMEOUT
PERIOD
RESET
TIMEOUT
PERIOD
VTH
DETECT
VCC
VBATT
LBO
RESET
VCC
1.23V
Q
MR
Figure 1a. Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6439UTPQRD7 | 制造商:Maxim Integrated Products 功能描述:LOW-POWERSINGLE/DUAL-LEVEL BATTERY - Rail/Tube |
| MAX6439UTPQRD7+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 2.3V 6PIN SOT-23 - Rail/Tube |
| MAX6439UTPQRD7+T | 功能描述:电池管理 Single Battery Monitor 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 |
| MAX6439UTPQRD7-T | 功能描述:电池管理 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 |
| MAX6439UTPQSD3 | 制造商:Maxim Integrated Products 功能描述:LOW-POWERSINGLE/DUAL-LEVEL BATTERY - Rail/Tube |
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