参数资料
型号: MAX1708
厂商: Maxim Integrated Products, Inc.
元件分类: DC/DC变换器
英文描述: High-Frequency, High-Power, Low-Noise, Step-Up DC-DC Converter
中文描述: 高频、大功率、低噪声、升压型DC-DC转换器
文件页数: 4/13页
文件大小: 332K
代理商: MAX1708
Note 1:
Output voltage is specified at 0.5A switch current I
SW
, which is equivalent to approximately 0.5A
(V
IN
/ V
OUT
) of load cur-
rent.
Note 2:
Load regulation is measured by forcing specified switch current and straight-line calculation of change in output voltage in
external feedback mode. Note that the equivalent load current is approximately I
SW
(V
IN
/ V
OUT
).
Note 3:
Until undervoltage lockout is reached, the device remains in startup mode. Do not apply full load until this voltage is
reached.
Note 4:
Startup is tested with Figure 1
s circuit. Output current is measured when both the input and output voltages are applied.
Note 5:
Minimum operating voltage. The MAX1708 is bootstrapped and will operate down to a 0.7V input once started.
Note 6:
Supply current is measured from the output voltage (+3.3V) to the OUT pin. This correlates directly with actual input supply
current but is reduced in value according to the step-up ratio and efficiency.
Note 7:
ONA and
ONB
inputs have approximately 0.15V hysteresis.
Note 8:
Guaranteed by design, not production tested.
Note 9:
Specifications to -40
°
C are guaranteed by design, not production tested.
M
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
OUT
= V
CLK
= +3.6V, ONA =
ONB
= FB = GND,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted.) (Note 9)
PARAMETER
CONDITIONS
MIN
MAX
UNITS
ONA,
ONB
,
3.3
/5, 1.2V < V
OUT
< 5.5V
0.2
V
OUT
Input Low Level (Note 7)
CLK, 2.7V < V
OUT
< 5.5V
0.2
V
OUT
V
ONA,
ONB
,
3.3
/5, 1.2V < V
OUT
< 5.5V
0.8
V
OUT
Input High Level
CLK, 2.7V < V
OUT
< 5.5V
ONA,
ONB
, CLK,
3.3
/5 = 0, 5.5V
0.8
V
OUT
-1
500
80
350
100
V
Logic Input Current
Internal Oscillator Frequency
Maximum Duty Cycle
External Clock Frequency Range
CLK Pulse Width
CLK Rise/Fall Time
1
μA
kHz
%
kHz
ns
ns
700
95
1000
(Note 8)
(Note 8)
50
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