參數(shù)資料
型號(hào)： MAX1774EEI
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Dual, High-Efficiency, Step-Down Converter with Backup Battery Switchover
中文描述： 3 A SWITCHING CONTROLLER, 1250 kHz SWITCHING FREQ-MAX, PDSO28
封裝： 0.150 INCH, 0.025 INCH PITCH, QSOP-28
文件頁數(shù)： 6/21頁
文件大小： 398K
代理商： MAX1774EEI
M
Dual, High-Effic ienc y, S tep-Down
Converter with Bac kup Battery S witc hover
6
_______________________________________________________________________________________
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
CORE REGULATOR
Input Voltage Range
V
INC
2.6
2.39
2.29
5.5
2.55
2.45
V
V
INC
rising
V
INC
falling
INC Undervoltage Lockout
V
Core Output Voltage Adjust
Range
1.0
5.0
V
Maximum Core Load Current
V
CORE
= 1.8V (Note 1)
V
INC
= +2.5 to +5.5V,
I
OUTC
= 0 to 200mA
V
FBC
= +1.3V
I
OUTC
= 400mA
V
INC
= +5.5V, V
LXC
= 0 to +5.5V
1
A
FBC Regulation Threshold
V
FBC
0.97
1.03
V
FBC Input Current
Dropout Voltage
LXC Leakage Current
I
FBC
-0.1
0.1
0.25
10
μA
V
μA
I
LXC
-10
LXC P-Channel, N-Channel
On-Resistance
0.5
LXC P-Channel Current Limit
LXC P-Channel Minimum
Current
LXC N-Channel Valley Current
LXC N-Channel Zero-Crossing
Current
Max Duty Cycle
Minimum On-Time
Minimum Off-Time
BACKUP REGULATOR
Backup Battery Input Voltage
LXB N-Channel On Resistance
LXB Current Limit
LXB Leakage Current
1200
3010
mA
100
420
mA
880
2450
mA
40
170
mA
100
160
170
%
ns
ns
700
690
V
BBATT
0.9
5.5
3.5
600
1
V
mA
μA
V
CS-
= +3.3V, I
LXB
= 50mA
200
V
LXB
= +5.5V, V
FBM
= +1.3V
V
BIN
= +5.5V, CS- =
BKOFF
=
SHDNC
=
SHDNM
= GND
BIN Leakage Current
I
BIN
1
μA
BIN, CS- Switch Resistance
V
CS-
= +3.3V,
BKOFF
= GND,
SHDNC
= CVL
15
BIN Switch Zero-Crossing
Threshold
V
BIN
= +2.5V,
BKOFF
=
SHDNC
=
SHDNM
= CVL
35
mV
LXB Maximum On-Time
REFERENCE
Reference Voltage
Reference Load Regulation
Reference Line Regulation
Reference Sink Current
2.8
9.2
μs
V
REF
1.220
1.275
10
5
V
I
REF
= 0 to 50μA
V
CS-
= +2.5V to +5.5V, I
REF
= 50μA
mV
mV
μA
10
ELECTRICAL CHARACTERISTICS (continued)
(Figure 1, V
IN
= V
INS
= +12V, V
INC
= V
CS+
= V
CS-
= +3.3V, V
CORE
= +1.8V,
T
A
= -40
°
C to +85
°
C,
unless otherwise noted.) (Note 2)
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MAX1774EEI+ 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Dual Step-Down w/Switchover RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1774EEI+T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Dual Step-Down w/Switchover RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1774EEI-T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1774EGJ 制造商:Maxim Integrated Products 功能描述:
MAX1774EMJ 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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