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| 型号： | MAX1701EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SYNC ADJ 0.8A 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.2 V ~ 5.5 V |
| 输入电压： | 0.7 V ~ 5.5 V |
| 频率 - 开关： | 300kHz |
| 电流 - 输出： | 800mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QSOP |
1-Cell to 3-Cell, High-Power (1A),
Low-Noise, Step-Up DC-DC Converters
0.7V TO 5.5V
POUT
REF
L1
MAX1701
CLK/SEL
LX
POUT
D1
LBO
MAX1701
LBN
R5
0.22 μ F
R3
ONA
ONB
OUT
10 ?
0.22 μ F
ARBITRARY
VOLTAGE
BATTERY
VOLTAGE
10k
LBP
GND
R6
LBP
POK
VOLTAGE MONITOR
R4
LBN LBO
REF AO
GND PGND FB AIN
LOW-BATTERY MONITOR
ARBITRARY VOLTAGE MONITOR
R5
Figure 7. Detecting Battery Voltages Below 1.25V (MAX1701)
R6
OUTPUT
P
10 ?
Figure 5. Detecting Battery Voltage Above 1.25V
C5
270k
C3
0.22 μ F
OUT
POUT
R3
POUT
C4
LBN
OUT
LBO
MAX1701
R4
MAX1701
R3
LBP
LBO
LBN
LBP
0.22 μ F
REF
GND
REF
R4
0.22 μ F
GND
Figure 8. Using the Low-Battery Comparator for Load Control
During Start-Up
Figure 6. Using the Low-Battery Comparator to Sense the
Output Voltage (MAX1701)
between the positive battery terminal and GND (Figure
5). The resistor values are then calculated as follows:
R3 = R4(V TH /V LBN -1)
where V TH is the desired input voltage trip threshold
and V LBN = V REF = 1.25V. Since the input bias current
into LBP is less than 20nA, R4 can be a large value
(such as 270k ? or less) without sacrificing accuracy.
The inputs have a common-mode input range from
0.5V to 1.5V and an input-referred hysteresis of 15mV.
The low-battery comparator can also be used to moni-
tor the output voltage, as shown in Figure 6.
To set the low-battery threshold to a voltage below the
1.25V reference, insert a resistor divider between REF
and LBN and connect the battery to the LBP input
through a 10k ? current-limiting resistor (Figure 7). The
equation for setting the resistors for the low-battery
threshold is then as follows:
R5 = R6(V REF /V LBP -1)
where V LBP is the desired voltage threshold. In Figures
5, 6, and 7, LBO goes low for a low-voltage input. The
low-battery comparator can be used to check the out-
put voltage or to control the load directly on P OUT dur-
ing start-up (Figure 8). Use the following equation to set
the resistor values:
R3 = R4(V OUTTH /V LBP - 1)
where V OUTTH is the desired output-voltage trip point
and V LBP is connected to the reference or 1.25V.
12
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| MAX17021EVKIT+ | 功能描述:电源管理IC开发工具 MAX17021 Eval Kit 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 |
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