參數(shù)資料
型號： MAX1845EEI
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit
中文描述： DUAL SWITCHING CONTROLLER, 620 kHz SWITCHING FREQ-MAX, PDSO28
封裝： 0.150 INCH, 0.025 INCH PITCH, MO-137AD, QSOP-28
文件頁數(shù)： 3/27頁
文件大?。?/td> 543K
代理商： MAX1845EEI
M
Dual, High-Efficiency, Step-Down
Controller with Accurate Current Limit
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
DD
= V
CC
= 5V,
SKIP
= AGND, V+ = 15V,
T
A
= 0
°
C to +85
°
C
, typical values are at +25
°
C, unless otherwise
noted.)
PARAMETER
SYMBOL
CONDITIONS
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
MIN
120
153
222
316
160
205
301
432
125
125
125
125
TYP
137
174
247
353
182
234
336
483
135
135
135
135
400
1100
<1
25
<1
1
<1
MAX
153
195
272
390
204
263
371
534
145
145
145
145
500
1500
5
70
5
5
5
UNITS
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+)
t
OFF
I
CC
I
DD
I+
ns
μA
μA
μA
FB_ forced above the regulation point
FB_ forced above the regulation point
Measured at V+
ON1 = ON2 = AGND, OVP = V
CC
or AGND
ON1 = ON2 = AGND, V
OVP
= 1.8V
ON1 = ON2 = AGND
Shutdown Supply Current (V
CC
)
μA
Shutdown Supply Current (V
DD
)
μA
Shutdown Supply Current (V+)
ON1 = ON2 = AGND, measured at V+,
V
CC
= AGND or 5V
V
CC
= 4.5V to 5.5V, no external REF load
I
REF
= 0 to 50μA
REF in regulation
Falling edge, hysteresis = 40mV
<1
5
μA
Reference Voltage
Reference Load Regulation
REF Sink Current
REF Fault Lockout Voltage
V
REF
1.98
2
2.02
0.01
V
V
μA
V
10
1.6
Overvoltage Trip Threshold
(Fixed-Threshold Mode)
OVP = AGND, with respect to error-
comparator trip threshold
112
114
117
%
1V < V
OVP
< 1.8V, external feedback,
measured at FB_ with respect to V
OVP
-28
0
28
mV
Overvoltage Comparator Offset
(Adjustable-Threshold Mode)
1V < V
OVP
< 1.8V, internal feedback,
measured at OUT_ with respect to OUT_
regulation point
-3.5
0
+3.5
%
OVP Input Leakage Current
1V < V
OVP
< 1.8V
-100
<1
100
nA
Overvoltage Fault Propagation
Delay
FB_ forced 2% above trip threshold
1.5
μs
Output Undervoltage Threshold
UVP = V
CC
, with respect to error-comparator
trip threshold
65
70
75
%
Output Undervoltage Protection
Blanking Time
From ON_ signal going high
10
30
ms
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相關代理商/技術參數(shù)
參數(shù)描述
MAX1845EEI+ 功能描述:電流型 PWM 控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX1845EEI+T 功能描述:電流型 PWM 控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX1845EEI-T 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX1845EEI-TG05 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX1845EEI-TG068 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
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