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参数资料
型号： MAX1845
厂商： Maxim Integrated Products, Inc.
英文描述： Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit
中文描述： 双路、高效率、降压型控制器，带有精确限流
文件页数： 5/27页
文件大小： 543K
代理商： MAX1845
M
Dual, High-Efficiency, Step-Down
Controller with Accurate Current Limit
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
DD
= V
CC
= 5V,
SKIP
= AGND, V+ = 15V,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted.) (Note 5)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
PWM CONTROLLERS
V+
Battery voltage, V+
V
CC
, V
DD
2
28
5.5
1.827
1.523
1.015
2.537
1.015
5.5
0.15
Input Voltage Range
V
CC
/V
DD
4.5
1.773
1.477
0.985
2.463
0.985
1
0.05
V
FB1 to AGND
FB1 to V
CC
FB1 to OUT1
FB2 to AGND
FB2 to OUT2
D C O utp ut V ol ag e, O U T1 ( N ote 2)
V
OUT1
V+ = 2V to 28V,
SKIP
= V
CC
,
I
LOAD
= 0 to 10A
V
D C O utp ut V ol ag e, O U T2 ( N ote 2)
V
OUT2
V+ = 2V to 28V,
SKIP
= V
CC
,
I
LOAD
= 0 to 10A
OUT1, OUT2
OVP, FB_
V
Output Voltage Adjust Range
Dual-Mode Threshold (Low)
V
V
OVP, ILIM_
V
CC
-
1.5
V
CC
-
0.4
Dual-Mode Threshold (High)
FB_
V
OUT1
= 1.5V
V
OUT2
= 2.5V
1.9
75
100
-0.1
120
153
217
308
160
205
295
422
125
125
125
125
2.1
V
R
OUT1
R
OUT2
I
FB
OUT_ Input Resistance
k
FB_ Input Bias Current
0.1
153
195
272
390
204
263
371
534
145
145
145
145
500
1500
5
70
2.02
0.01
μA
TON = AGND
TON = REF
TON = float
TON = V
CC
TON = AGND
TON = REF
TON = float
TON = V
CC
TON = AGND
TON = REF
TON = float
TON = V
CC
On-Time, Side 1 (Note 3)
t
ON1
V+ = 24V, V
OUT1
= 2V
ns
On-Time, Side 2 (Note 3)
t
ON2
V+ = 24V, V
OUT2
= 2V
ns
On-Time Tracking (Note 3)
On-time 2, with
respect to on-time 1
%
Minimum Off-Time (Note 3)
Quiescent Supply Current (V
CC
)
Quiescent Supply Current (V
DD
)
Quiescent Supply Current (V+)
Reference Voltage
Reference Load Regulation
t
OFF
I
CC
I
DD
I+
V
REF
ns
μA
μA
μA
V
V
FB forced above the regulation point
FB forced above the regulation point
Measured at V+
V
CC
= 4.5V to 5.5V, no external REF load
I
REF
= 0 to 50uA
OVP = GND, with respect to FB_ regulation
point, no load
1.98
Overvoltage Trip Threshold
(Fixed-Threshold Mode)
112
117
%
Output Undervoltage Threshold
UVP = V
CC
, with respect to FB_ regulation
point, no load
65
75
%
Current-Limit Threshold (Fixed)
AGND - V
CS
_, ILIM_ = V
CC
35
65
mV
相关PDF资料
PDF描述
MAX1845EEI Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit
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MAX1845EEI+ 功能描述:电流型 PWM 控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX1845EEI+T 功能描述:电流型 PWM 控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
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