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参数资料
| 型号： | MAX1705 |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | DC/DC变换器 |
| 英文描述： | 1- to 3-Cell, High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator |
| 中文描述： | 1至3节电池、大电流、低噪声、升压型DC-DC转换器，带有线性稳压器 |
| 文件页数： | 4/20页 |
| 文件大小： | 215K |
| 代理商： | MAX1705 |
M
1- to 3-Cell, High-Current, Low-Noise,
Step-Up DC-DC Converters with Linear Regulator
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
OUT
= V
POUT
= V
LBP
= 3.6V, CLK/SEL = FB = LBN = LBO = ONA =
ONB
= TRACK = GND, REF = open (bypassed with 0.22μF),
LX = open,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS
(V
OUT
= V
POUT
= V
LBP
= 3.6V, CLK/SEL = FB = LBN = LBO = ONA =
ONB
= TRACK = GND, REF = open (bypassed with 0.22μF),
LX = open,
T
A
= -40°C to +85°C,
unless otherwise noted, Note 4.)
PARAMETER
SYMBOL
CONDITIONS
PARAMETER
SYMBOL
MIN
260
TYP
300
MAX
340
UNITS
kHz
Minimum CLK/SEL Pulse
Internal Oscillator Frequency
200
ns
Maximum CLK/SEL
Rise/Fall Time
100
ns
CONDITIONS
CLK/SEL = OUT
Supply Current in
Low-Power Mode
I
OUT
190
μA
CLK/SEL = 0V, FB = FBLDO = 1.5V, no load
Supply Current in Shutdown
I
OUT
20
μA
ONA = 0V,
ONB
= OUT, measure I
OUT
OUT Voltage in Track Mode
V
LDO
+
0.2
V
LDO
+
0.4
V
TRACK = OUT, V
LDO
> 2.3V
250
570
MAX1706
MAX1706
MAX1705
CLK/SEL = OUT
CLK/SEL = OUT
CLK/SEL = 0V
MAX1705
CLK/SEL = 0V
0.28
0.50
Switch On-Resistance
0.45
N-channel, I
LX
= 100mA
550
250
950
570
N-Channel MOSFET
Current Limit
I
LIM
1000
1700
mA
CLK/SEL = OUT
CLK/SEL = 0V
P-channel, I
LX
= 100mA
MIN
TYP
MAX
P-Channel Synchronous-
Rectifier Turn-Off Current
UNITS
20
120
mA
Start-Up to Normal Mode
Transition Voltage
2.0
2.3
V
FB Regulation Voltage
1.215
1.251
V
CLK/SEL = OUT
Reference Output Voltage
DC-DC CONVERTER
1.235
1.265
V
I
REF
= 0μA
Oscillator Maximum Duty Cycle
80
86
90
%
External Oscillator
Synchronization Range
200
400
kHz
Supply Current in
Low-Noise Mode
I
OUT
360
μA
CLK/SEL = OUT, V
FB
= V
FBLDO
= 1.5V,
no load
DC-DC CONVERTER
REFERENCE
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