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参数资料
| 型号： | MAX1700-MAX1701 |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | DC/DC变换器 |
| 英文描述： | 1-Cell to 3-Cell, High-Power 1A, Low-Noise, Step-Up DC-DC Converters |
| 中文描述： | 1节至3节电池，大功率1A中，低噪声，升压型DC - DC转换器 |
| 文件页数： | 5/16页 |
| 文件大小： | 248K |
| 代理商： | MAX1700-MAX1701 |
Input High Voltage (Note 7)
Logic Input Current
Internal Oscillator Frequency
Oscillator Maximum Duty Cycle
M
1-Cell to 3-Cell, High-Power (1A),
Low-Noise, S tep-Up DC-DC Converters
_______________________________________________________________________________________
5
Note 1:
Operating voltage. Since the regulator is bootstrapped to the output, once started it will operate down to 0.7V input.
Note 2:
Start-up is tested with the circuit of Figure 2.
Note 3:
In low-power mode (CLK/SEL = GND), the output voltage regulates 1% higher than low-noise mode (CLK/SEL = OUT or
synchronized).
Note 4:
The regulator is in start-up mode until this voltage is reached. Do not apply full load current.
Note 5:
Load regulation is measured from no-load to full load where full load is determined by the N-channel switch current limit.
Note 6:
Supply current from the 3.30V output is measured between the 3.30V output and the OUT pin. This current correlates
directly to the actual battery supply current, but is reduced in value according to the step-up ratio and efficiency. Set V
OUT
= 3.6V to keep the internal switch open when measuring the current into the device.
Note 7:
ONA and
ONB
have hysteresis of approximately 0.15xV
OUT
.
Note 8:
Specifications to -40°C are guaranteed by design and not production tested.
ELECTRICAL CHARACTERISTICS (continued)
(CLK/SEL = ONA =
ONB
= FB = PGND = GND, OUT = POUT, V
OUT
= 3.6V, MAX1701: AIN = LBN = GND, LBP = REF,
T
A
= -40°C to +85°C, unless otherwise noted.) (Note 8)
CONDITIONS
PARAMETER
LOGIC AND CONTROL INPUTS
2.5V < V
OUT
< 5.5V, CLK/SEL
1.2V < V
OUT
< 5.5V, ONA and
ONB
2.5V < V
OUT
< 5.5V, CLK/SEL
1.2V < V
OUT
< 5.5V, ONA and
ONB
0.2V
OUT
V
0.2V
OUT
Input Low Voltage (Note 7)
0.8V
OUT
0.8V
OUT
Input High Voltage (Note 7)
ONA,
ONB
, and CLK/SEL
CLK/SEL = OUT
μA
kHz
%
-1
260
80
1
V
340
92
UNITS
MIN
TYP
MAX
kHz
200
400
External Clock Frequency
Range
Typic al Operating Charac teristic s
(T
A
= +25°C, unless otherwise noted.)
100
90
40
0.1
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 3.3V)
50
M
LOAD CURRENT (mA)
E
60
70
80
PFM
PWM
V
IN
= 0.9V
V
IN
= 1.2V
V
IN
= 2.4V
M
100
90
40
30
0.1
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 5V)
50
LOAD CURRENT (mA)
E
60
70
80
V
IN
= 1.2V
V
IN
= 2.4V
V
IN
= 3.6V
PFM
PWM
0
2.0
1.0
4.0
3.0
6.0
5.0
7.0
0
2
3
1
4
5
6
MAX1701
SHUTDOWN CURRENT
vs. INPUT VOLTAGE (V)
M
INPUT VOLTAGE (V)
S
μ
A
T = 85°C
T = 25°C
T = -40°C
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